Parser Leave feedback

Inheritance: java.lang.Object

All Implemented Interfaces: java.io.Closeable

public class Parser implements Closeable

Represents the main class that controls text, images, container extraction and parsing functionality.

public Parser(URL url)

Initializes a new instance of the Parser class to extract data from an URL.

Parameters:

public Parser(URL url, LoadOptions loadOptions)

Initializes a new instance of the Parser class to extract data from an URL with loadOptions .

Parameters:

public Parser(URL url, ParserSettings parserSettings)

Initializes a new instance of the Parser class to extract data from an URL with parserSettings .

Parameters:

public Parser(URL url, LoadOptions loadOptions, ParserSettings parserSettings)

Initializes a new instance of the Parser class to extract data from an URL with loadOptions and parserSettings .

Parameters:

public Parser(Connection connection)

Initializes a new instance of the Parser class to extract data from a database.

Learn more:

• Extract data from databases

The following example shows how to extract data from Sqlite database:

// Create DbConnection object
 java.sql.Connection connection = java.sql.DriverManager.getConnection(String.format("jdbc:sqlite:%s", Constants.SampleDatabase));
 // Create an instance of Parser class to extract tables from the database
 try (Parser parser = new Parser(connection)) {
     // Check if text extraction is supported
     if (!parser.getFeatures().isText()) {
         System.out.println("Text extraction isn't supported.");
         return;
     }
     // Check if toc extraction is supported
     if (!parser.getFeatures().isToc()) {
         System.out.println("Toc extraction isn't supported.");
         return;
     }
     // Get a list of tables
     Iterable toc = parser.getToc();
     // Iterate over tables
     for(TocItem i : toc)
     {
         // Print the table name
         System.out.println(i.extractText());
         // Extract a table content as a text
         try(TextReader reader = parser.getText(i.getPageIndex().intValue()))
         {
             System.out.println(reader.readToEnd());
         }
     }
 }
 

Parameters:

public Parser(Connection connection, ParserSettings parserSettings)

Initializes a new instance of the Parser class to extract data from a database.

Learn more:

• Extract data from databases
• Logging

The following example shows how to extract data from Sqlite database:

// Create DbConnection object
 java.sql.Connection connection = java.sql.DriverManager.getConnection(String.format("jdbc:sqlite:%s", Constants.SampleDatabase));
 // Create an instance of Parser class to extract tables from the database
 try (Parser parser = new Parser(connection)) {
     // Check if text extraction is supported
     if (!parser.getFeatures().isText()) {
         System.out.println("Text extraction isn't supported.");
         return;
     }
     // Check if toc extraction is supported
     if (!parser.getFeatures().isToc()) {
         System.out.println("Toc extraction isn't supported.");
         return;
     }
     // Get a list of tables
     Iterable toc = parser.getToc();
     // Iterate over tables
     for(TocItem i : toc)
     {
         // Print the table name
         System.out.println(i.extractText());
         // Extract a table content as a text
         try(TextReader reader = parser.getText(i.getPageIndex().intValue()))
         {
             System.out.println(reader.readToEnd());
         }
     }
 }
 

Parameters:

public Parser(EmailConnection connection)

Initializes a new instance of the Parser class.

Learn more:

• Extract emails from remote server via POP, IMAP or Exchange Web Services protocols

The following example shows how to extract emails from Exchange Server:

// Create the connection object for Exchange Web Services protocol
 EmailConnection connection = new EmailEwsConnection(
         "https://outlook.office365.com/ews/exchange.asmx",
         "email@server",
         "password");
 // Create an instance of Parser class to extract emails from the remote server
 try (Parser parser = new Parser(connection)) {
     // Check if container extraction is supported
     if (!parser.getFeatures().isContainer()) {
         System.out.println("Container extraction isn't supported.");
         return;
     }
     // Extract email messages from the server
     Iterable emails = parser.getContainer();
     // Iterate over attachments
     for (ContainerItem item : emails) {
         // Create an instance of Parser class for email message
         try (Parser emailParser = item.openParser()) {
             // Extract the email text
             try (TextReader reader = emailParser.getText()) {
                 // Print the email text
                 System.out.println(reader == null ? "Text extraction isn't supported." : reader.readToEnd());
             }
         }
     }
 }
 

Parameters:

public Parser(EmailConnection connection, ParserSettings parserSettings)

Initializes a new instance of the Parser class.

Learn more:

• Extract emails from remote server via POP, IMAP or Exchange Web Services protocols
• Logging

The following example shows how to extract emails from Exchange Server:

// Create the connection object for Exchange Web Services protocol
 EmailConnection connection = new EmailEwsConnection(
         "https://outlook.office365.com/ews/exchange.asmx",
         "email@server",
         "password");
 // Create an instance of Parser class to extract emails from the remote server
 try (Parser parser = new Parser(connection)) {
     // Check if container extraction is supported
     if (!parser.getFeatures().isContainer()) {
         System.out.println("Container extraction isn't supported.");
         return;
     }
     // Extract email messages from the server
     Iterable emails = parser.getContainer();
     // Iterate over attachments
     for (ContainerItem item : emails) {
         // Create an instance of Parser class for email message
         try (Parser emailParser = item.openParser()) {
             // Extract the email text
             try (TextReader reader = emailParser.getText()) {
                 // Print the email text
                 System.out.println(reader == null ? "Text extraction isn't supported." : reader.readToEnd());
             }
         }
     }
 }
 

Parameters:

public Parser(String filePath)

Initializes a new instance of the Parser class.

Learn more:

• Load document from local disk

The following example shows how to load the document from the local disk:

// Set the filePath
 String filePath = Constants.SamplePdf;
 // Create an instance of Parser class with the filePath
 try (Parser parser = new Parser(filePath)) {
     // Extract a text into the reader
     try (TextReader reader = parser.getText()) {
         // Print a text from the document
         // If text extraction isn't supported, a reader is null
         System.out.println(reader == null ? "Text extraction isn't supported" : reader.readToEnd());
     }
 }
 

Parameters:

public Parser(String filePath, LoadOptions loadOptions)

Initializes a new instance of the Parser class with LoadOptions.

Learn more:

• Load document from local disk
• Loading specific file formats
• Password-protected documents

The document password is passed by LoadOptions class:

try {
     String password = "123456";
     // Create an instance of Parser class with the password:
     try (Parser parser = new Parser(Constants.SamplePassword, new LoadOptions(password))) {
         // Check if text extraction is supported
         if (!parser.getFeatures().isText()) {
             System.out.println("Text extraction isn't supported.");
             return;
         }
         // Print the document text
         try (TextReader reader = parser.getText()) {
             System.out.println(reader.readToEnd());
         }
     }
 } catch (InvalidPasswordException ex) {
     // Print the message if the password is incorrect or empty
     System.out.println("Invalid password");
 }
 

Parameters:

public Parser(String filePath, ParserSettings parserSettings)

Initializes a new instance of the Parser class with ParserSettings.

Parameters:

public Parser(String filePath, LoadOptions loadOptions, ParserSettings parserSettings)

Initializes a new instance of the Parser class with LoadOptions and ParserSettings.

Learn more:

• Load document from local disk
• Loading specific file formats
• Password-protected documents
• Logging

The following example shows how to receive the information via ILogger interface:

try {
     // Create an instance of Logger class
     Logger logger = new Logger();
     // Create an instance of Parser class with the parser settings
     try (Parser parser = new Parser(Constants.SamplePassword, null, new ParserSettings(logger))) {
         // Check if text extraction is supported
         if (!parser.getFeatures().isText()) {
             System.out.println("Text extraction isn't supported.");
             return;
         }
         // Print the document text
         try (TextReader reader = parser.getText()) {
             System.out.println(reader.readToEnd());
         }
     }
 } catch (InvalidPasswordException | IOException ex) {
     ; // Ignore the exception
 }

 class Logger implements ILogger {
     public void error(String message, Exception exception) {
         // Print error message
         System.out.println("Error: " + message);
     }

     public void trace(String message) {
         // Print event message
         System.out.println("Event: " + message);
     }

     public void warning(String message) {
         // Print warning message
         System.out.println("Warning: " + message);
     }
 }
 

Parameters:

public Parser(InputStream document)

Initializes a new instance of the Parser class.

Learn more:

• Load document from stream

The following example shows how to load the document from the stream:

// Create the stream
 try (InputStream stream = new FileInputStream(Constants.SamplePdf)) {
     // Create an instance of Parser class with the stream
     try (Parser parser = new Parser(stream)) {
         // Extract a text into the reader
         try (TextReader reader = parser.getText()) {
             // Print a text from the document
             // If text extraction isn't supported, a reader is null
             System.out.println(reader == null ? "Text extraction isn't supported" : reader.readToEnd());
         }
     }
 }
 

Parameters:

public Parser(InputStream document, LoadOptions loadOptions)

Initializes a new instance of the Parser class with LoadOptions.

Learn more:

• Load document from stream
• Loading specific file formats
• Password-protected documents

In some cases it’s necessary to define FileFormat. Both for special cases (databases, email server) and for detecting file types by the content:

// Create an instance of Parser class for markdown document
 try (Parser parser = new Parser(stream, new LoadOptions(FileFormat.Markup))) {
     // Check if text extraction is supported
     if (!parser.getFeatures().isText()) {
         System.out.println("Text extraction isn't supported.");
         return;
     }
     try (TextReader reader = parser.getText()) {
         // Print the document text
         // Markdown is detected; text without special symbols is printed
         System.out.println(reader.readToEnd());
     }
 }
 

Parameters:

public Parser(InputStream document, ParserSettings parserSettings)

Initializes a new instance of the Parser class with ParserSettings.

Parameters:

public Parser(InputStream document, LoadOptions loadOptions, ParserSettings parserSettings)

Initializes a new instance of the Parser class with LoadOptions and ParserSettings.

Learn more:

• Load document from stream
• Loading specific file formats
• Password-protected documents
• Logging

The following example shows how to receive the information via ILogger interface:

try {
     // Create an instance of Logger class
     Logger logger = new Logger();
     // Create an instance of Parser class with the parser settings
     try (Parser parser = new Parser(Constants.SamplePassword, null, new ParserSettings(logger))) {
         // Check if text extraction is supported
         if (!parser.getFeatures().isText()) {
             System.out.println("Text extraction isn't supported.");
             return;
         }
         // Print the document text
         try (TextReader reader = parser.getText()) {
             System.out.println(reader.readToEnd());
         }
     }
 } catch (InvalidPasswordException | IOException ex) {
     ; // Ignore the exception
 }

 class Logger implements ILogger {
     public void error(String message, Exception exception) {
         // Print error message
         System.out.println("Error: " + message);
     }

     public void trace(String message) {
         // Print event message
         System.out.println("Event: " + message);
     }

     public void warning(String message) {
         // Print warning message
         System.out.println("Warning: " + message);
     }
 }
 

Parameters:

public static FileInfo getFileInfo(String filePath)

Returns the general information about a file.

The following code shows how to check whether a file is password-protected:

// Get a file info
 FileInfo info = Parser.getFileInfo(filePath);
 // Check IsEncrypted property
 System.out.println(info.isEncrypted() ? "Password is required" : "");

Parameters:

Returns: FileInfo - An instance of FileInfo class.

public static FileInfo getFileInfo(InputStream document)

Returns the general information about a file.

The following code shows how to check whether a file is password-protected:

// Get a file info
 FileInfo info = Parser.getFileInfo(filePath);
 // Check IsEncrypted property
 System.out.println(info.isEncrypted() ? "Password is required" : "");

Parameters:

Returns: FileInfo - An instance of FileInfo class.

public Features getFeatures()

Gets the supported features.

Learn more:

• Get supported features

If the feature isn’t supported, the method returns null instead of the value. Some operations may consume significant time. So it’s not optimal to call the method to just check the support for the feature. For this purpose Features property is used:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleZip)) {
     // Check if text extraction is supported for the document
     if (!parser.getFeatures().isText()) {
         System.out.println("Text extraction isn't supported");
         return;
     }
     // Extract a text from the document
     try (TextReader reader = parser.getText()) {
         System.out.println(reader.readToEnd());
     }
 }
 

Returns: Features - An instance of Features class that represents the supported features.

public OutputStream getPagePreview(int pageIndex)

Generates a document page preview.

Parameters:

Returns: java.io.OutputStream - An instance of java.io.OutputStream containing an image of the document page; null if the page preview generation isn’t supported.

public OutputStream getPagePreview(int pageIndex, PagePreviewOptions options)

Generates a document page preview using customization options.

Parameters:

Returns: java.io.OutputStream - An instance of java.io.OutputStream containing an image of the document page; null if the page preview generation isn’t supported.

public void generatePreview(PreviewOptions previewOptions)

Get pages preview.

Parameters:

public IDocumentInfo getDocumentInfo()

Returns the general information about the document.

Learn more:

• Get document info
• Detect encoding

The following example shows how to get document info:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleDocx)) {
     // Get the document info
     IDocumentInfo info = parser.getDocumentInfo();
     // Print document information
     System.out.println(String.format("FileType: %s", info.getFileType()));
     System.out.println(String.format("PageCount: %d", info.getPageCount()));
     System.out.println(String.format("Size: %d", info.getSize()));
 }
 

Returns: IDocumentInfo - An instance of class that implements IDocumentInfo interface.

public TextReader getText()

Extracts a text from the document.

Learn more:

• Extract text from documents
• Extract text in Accurate Mode

The following example shows how to extract a text from a document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Extract a text into the reader
     try (TextReader reader = parser.getText()) {
         // Print a text from the document
         // If text extraction isn't supported, a reader is null
         System.out.println(reader == null ? "Text extraction isn't supported" : reader.readToEnd());
     }
 }
 

Returns: TextReader - An instance of TextReader class with the extracted text; null if text extraction isn’t supported.

public TextReader getText(TextOptions options)

Extracts a text page from the document using text options (to enable raw fast text extraction mode).

Learn more:

• Extract text in Raw Mode
• Extract text in Accurate Mode

The following example shows how to extract a raw text from a document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Extract a raw text into the reader
     try (TextReader reader = parser.getText(new TextOptions(true))) {
         // Print a text from the document
         // If text extraction isn't supported, a reader is null
         System.out.println(reader == null ? "Text extraction isn't supported" : reader.readToEnd());
     }
 }
 

Parameters:

Returns: TextReader - An instance of TextReader class with the extracted text; null if text extraction isn’t supported.

public TextReader getText(int pageIndex)

Extracts a text from the document page.

Learn more:

• Extract text in Accurate Mode

The following example shows how to extract a text from the document page:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Check if the document supports text extraction
     if (!parser.getFeatures().isText()) {
         System.out.println("Document isn't supports text extraction.");
         return;
     }
     // Get the document info
     IDocumentInfo documentInfo = parser.getDocumentInfo();
     // Check if the document has pages
     if (documentInfo.getPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Iterate over pages
     for (int p = 0; p < documentInfo.getPageCount(); p++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", p + 1, documentInfo.getPageCount()));
         // Extract a text into the reader
         try (TextReader reader = parser.getText(p)) {
             // Print a text from the document
             // We ignore null-checking as we have checked text extraction feature support earlier
             System.out.println(reader.readToEnd());
         }
     }
 }
 

Parameters:

Returns: TextReader - An instance of TextReader class with the extracted text; null if text page extraction isn’t supported.

public TextReader getText(int pageIndex, TextOptions options)

Extracts a text from the document page using text options (to enable raw fast text extraction mode).

Learn more:

• Extract text in Raw Mode
• Extract text in Accurate Mode

The following example shows how to extract a raw text from the document page:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Check if the document supports text extraction
     if (!parser.getFeatures().isText()) {
         System.out.println("Document isn't supports text extraction.");
         return;
     }
     // Get the document info
     DocumentInfo documentInfo = parser.getDocumentInfo() instanceof DocumentInfo
             ? (DocumentInfo) parser.getDocumentInfo()
             : null;
     // Check if the document has pages
     if (documentInfo == null || documentInfo.getRawPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Iterate over pages
     for (int p = 0; p < documentInfo.getRawPageCount(); p++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", p + 1, documentInfo.getPageCount()));
         // Extract a text into the reader
         try (TextReader reader = parser.getText(p, new TextOptions(true))) {
             // Print a text from the document
             // We ignore null-checking as we have checked text extraction feature support earlier
             System.out.println(reader.readToEnd());
         }
     }
 }
 

Parameters:

Returns: TextReader - An instance of TextReader class with the extracted text; null if text page extraction isn’t supported.

public TextReader getFormattedText(FormattedTextOptions options)

Extracts a formatted text from the document.

Learn more:

• Extract formatted text from document
• Extract a document text as HTML
• Extract a document text as Markdown
• Extract a document text as Plain text

The following example shows how to extract a document text as HTML text:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleDocx)) {
     // Extract a formatted text into the reader
     try (TextReader reader = parser.getFormattedText(new FormattedTextOptions(FormattedTextMode.Html))) {
         // Print a formatted text from the document
         // If formatted text extraction isn't supported, a reader is null
         System.out.println(reader == null ? "Formatted text extraction isn't suppported" : reader.readToEnd());
     }
 }
 

Parameters:

Returns: TextReader - An instance of TextReader class with the extracted text; null if formatted text extraction isn’t supported.

public TextReader getFormattedText(int pageIndex, FormattedTextOptions options)

Extracts a formatted text from the document page.

Learn more:

• Extract formatted text from document page
• Extract a document text as HTML
• Extract a document text as Markdown
• Extract a document text as Plain text

The following example shows how to extract a document page text as Markdown text:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleDocx)) {
     // Check if the document supports formatted text extraction
     if (!parser.getFeatures().isFormattedText()) {
         System.out.println("Document isn't supports formatted text extraction.");
         return;
     }
     // Get the document info
     IDocumentInfo documentInfo = parser.getDocumentInfo();
     // Check if the document has pages
     if (documentInfo.getPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Iterate over pages
     for (int p = 0; p < documentInfo.getPageCount(); p++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", p + 1, documentInfo.getPageCount()));
         // Extract a formatted text into the reader
         try (TextReader reader = parser.getFormattedText(p, new FormattedTextOptions(FormattedTextMode.Markdown))) {
             // Print a formatted text from the document
             // We ignore null-checking as we have checked formatted text extraction feature support earlier
             System.out.println(reader.readToEnd());
         }
     }
 }
 

Parameters:

Returns: TextReader - An instance of TextReader class with the extracted text; null if formatted text page extraction isn’t supported.

public Iterable<SearchResult> search(String keyword)

Searches a keyword in the document.

Learn more:

• Search text
• Search text in Microsoft Office Word documents
• Search text in Microsoft Office Excel spreadsheets
• Search text in Microsoft Office PowerPoint presentations
• Search text in PDF documents
• Search text in Emails
• Search text in EPUB eBooks
• Search text in HTML documents
• Search text in Microsoft OneNote sections

The following example shows how to find a keyword in a document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Search a keyword:
     Iterable sr = parser.search("lorem");
     // Check if search is supported
     if (sr == null) {
         System.out.println("Search isn't supported");
         return;
     }
     // Iterate over search results
     for (SearchResult s : sr) {
         // Print an index and found text:
         System.out.println(String.format("At %d: %s", s.getPosition(), s.getText()));
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.SearchResult> - A collection of SearchResult objects; null if search isn’t supported.

public Iterable<SearchResult> search(String keyword, SearchOptions options)

Searches a keyword in the document using search options (regular expression, match case, etc.).

Learn more:

• Search text
• Search text in Microsoft Office Word documents
• Search text in Microsoft Office Excel spreadsheets
• Search text in Microsoft Office PowerPoint presentations
• Search text in PDF documents
• Search text in Emails
• Search text in EPUB eBooks
• Search text in HTML documents
• Search text in Microsoft OneNote sections

The following example shows how to search with a regular expression in a document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Search with a regular expression with case matching
     Iterable sr = parser.search("[0-9]+", new SearchOptions(true, false, true));
     // Check if search is supported
     if (sr == null) {
         System.out.println("Search isn't supported");
         return;
     }
     // Iterate over search results
     for (SearchResult s : sr) {
         // Print an index and found text:
         System.out.println(String.format("At %d: %s", s.getPosition(), s.getText()));
     }
 }
 

The following example shows how to search a text on pages:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Search a keyword with page numbers
     Iterable sr = parser.search("lorem", new SearchOptions(false, false, false, true));
     // Check if search is supported
     if (sr == null) {
         System.out.println("Search isn't supported");
         return;
     }
     // Iterate over search results
     for (SearchResult s : sr) {
         // Print an index, page number and found text:
         System.out.println(String.format("At %d (%d): %s", s.getPosition(), s.getPageIndex(), s.getText()));
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.SearchResult> - A collection of SearchResult objects; null if search isn’t supported.

public HighlightItem getHighlight(int position, boolean isDirect, HighlightOptions options)

Extracts a highlight from the document.

Learn more:

• Extract highlights

The following example shows how to extract a highlight that contains 3 words:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SamplePdf)) {
     // Extract a highlight:
     HighlightItem hl = parser.getHighlight(2, true, new HighlightOptions(10, 3));
     // Check if highlight extraction is supported
     if (hl == null) {
         System.out.println("Highlight extraction isn't supported");
         return;
     }
     // Print an extracted highlight
     System.out.println(String.format("At %d: %s", hl.getPosition(), hl.getText()));
 }
 

Parameters:

Returns: HighlightItem - An instance of HighlightItem class that represents the extracted highlight; null if highlight extraction isn’t supported.

public Iterable<TocItem> getToc()

Extracts a table of contents from the document.

Learn more:

• Extract table of contents
• Extract text by table of contents item
• Extract table of contents from Microsoft Office Word documents
• Extract table of contents from EPUB eBooks

The following example shows how to extract table of contents from EPUB file:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleEpub)) {
     // Check if text extraction is supported
     if (!parser.getFeatures().isText()) {
         System.out.println("Text extraction isn't supported.");
         return;
     }
     // Check if toc extraction is supported
     if (!parser.getFeatures().isToc()) {
         System.out.println("Toc extraction isn't supported.");
         return;
     }
     // Get table of contents
     Iterable toc = parser.getToc();
     // Iterate over items
     for (TocItem i : toc) {
         // Print the Toc text
         System.out.println(i.getText());
         // Check if page index has a value
         if (i.getPageIndex() == null) {
             continue;
         }
         // Extract a page text
         try (TextReader reader = parser.getText(i.getPageIndex())) {
             System.out.println(reader.readToEnd());
         }
     }
 }
 

Returns: java.lang.Iterable<com.groupdocs.parser.data.TocItem> - A collection of table of contents items; null if table of contents extraction isn’t supported.

public Iterable<MetadataItem> getMetadata()

Extracts metadata from the document.

Learn more:

• Extract metadata from documents
• Extract metadata from Microsoft Office Word documents
• Extract metadata from Microsoft Office Excel spreadsheets
• Extract metadata from Microsoft Office PowerPoint presentations
• Extract metadata from PDF documents
• Extract metadata from Emails

The following example shows how to extract metadata from a document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleDocx)) {
     // Extract metadata from the document
     Iterable metadata = parser.getMetadata();
     // Check if metadata extraction is supported
     if (metadata == null) {
         System.out.println("Metatada extraction isn't supported");
     }
     // Iterate over metadata items
     for (MetadataItem item : metadata) {
         // Print an item name and value
         System.out.println(String.format("%s: %s", item.getName(), item.getValue()));
     }
 }
 

Returns: java.lang.Iterable<com.groupdocs.parser.data.MetadataItem> - A collection of metadata items; null if metadata extraction isn’t supported.

public Iterable<ContainerItem> getContainer()

Extracts a container object from the document to work with formats that contain attachments, ZIP archives etc.

Learn more:

• Extract data from attachments and ZIP archives
• Iterate through container items
• Extract attachments from PDF portfolios
• Extract attachments from Emails
• Extract emails from Outlook Storage
• Extract text from ZIP archive files

The following example shows how to extract a text from zip entities:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleZip)) {
     // Extract attachments from the container
     Iterable attachments = parser.getContainer();
     // Check if container extraction is supported
     if (attachments == null) {
         System.out.println("Container extraction isn't supported");
     }
     // Iterate over zip entities
     for (ContainerItem item : attachments) {
         // Print the file path
         System.out.println(item.getFilePath());
         try {
             // Create Parser object for the zip entity content
             try (Parser attachmentParser = item.openParser()) {
                 // Extract an zip entity text
                 try (TextReader reader = attachmentParser.getText()) {
                     System.out.println(reader == null ? "No text" : reader.readToEnd());
                 }
             }
         } catch (UnsupportedDocumentFormatException ex) {
             System.out.println("Isn't supported.");
         }
     }
 }
 

Returns: java.lang.Iterable<com.groupdocs.parser.data.ContainerItem> - A collection of container items; null if container extraction isn’t supported.

public Iterable<PageTextArea> getTextAreas()

Extracts text areas from the document.

Learn more:

• Extract text areas

The following example shows how to extract all text areas from the whole document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleImagesPdf)) {
     // Extract text areas
     Iterable areas = parser.getTextAreas();
     // Check if text areas extraction is supported
     if (areas == null) {
         System.out.println("Page text areas extraction isn't supported");
         return;
     }
     // Iterate over page text areas
     for (PageTextArea a : areas) {
         // Print a page index, rectangle and text area value:
         System.out.println(String.format("Page: %d, R: %s, Text: %s", a.getPage().getIndex(), a.getRectangle(), a.getText()));
     }
 }
 

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTextArea> - A collection of PageTextArea objects; null if text areas extraction isn’t supported.

public Iterable<PageTextArea> getTextAreas(PageTextAreaOptions options)

Extracts text areas from the document using customization options (regular expression, match case, etc.).

Learn more:

• Extract text areas

The following example shows how to extract only text areas with digits from the upper-left courner:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleImagesPdf)) {
     // Create the options which are used for text area extraction
     PageTextAreaOptions options = new PageTextAreaOptions("\\s[a-z]{2}\\s", new Rectangle(new Point(0, 0), new Size(300, 100)));
     // Extract text areas which contain only digits from the upper-left corner of a page:
     Iterable areas = parser.getTextAreas(options);
     // Check if text areas extraction is supported
     if (areas == null) {
         System.out.println("Page text areas extraction isn't supported");
         return;
     }
     // Iterate over page text areas
     for (PageTextArea a : areas) {
         // Print a page index, rectangle and text area value:
         System.out.println(String.format("Page: %d, R: %s, Text: %s", a.getPage().getIndex(), a.getRectangle(), a.getText()));
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTextArea> - A collection of PageTextArea objects; null if text areas extraction isn’t supported.

public Iterable<PageTextArea> getTextAreas(int pageIndex)

Extracts text areas from the document page.

Learn more:

• Extract text areas

To extract text areas from a document page the following method is used:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleImagesPdf)) {
     // Check if the document supports text areas extraction
     if (!parser.getFeatures().isTextAreas()) {
         System.out.println("Document isn't supports text areas extraction.");
         return;
     }
     // Get the document info
     IDocumentInfo documentInfo = parser.getDocumentInfo();
     // Check if the document has pages
     if (documentInfo.getPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Iterate over pages
     for (int pageIndex = 0; pageIndex < documentInfo.getPageCount(); pageIndex++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", pageIndex + 1, documentInfo.getPageCount()));
         // Iterate over page text areas
         // We ignore null-checking as we have checked text areas extraction feature support earlier
         for (PageTextArea a : parser.getTextAreas(pageIndex)) {
             // Print a rectangle and text area value:
             System.out.println(String.format("R: %s, Text: %s", a.getRectangle(), a.getText()));
         }
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTextArea> - A collection of PageTextArea objects; null if text areas extraction isn’t supported.

public Iterable<PageTextArea> getTextAreas(int pageIndex, PageTextAreaOptions options)

Extracts text areas from the document page using customization options (regular expression, match case, etc.).

Learn more:

• Extract text areas

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTextArea> - A collection of PageTextArea objects; null if text areas extraction isn’t supported.

public Iterable<PageImageArea> getImages()

Extracts images from the document.

Learn more:

• Extract images from documents
• Extract images to files
• Extract images from Microsoft Office Word documents
• Extract images from Microsoft Office Excel spreadsheets
• Extract images from Microsoft Office PowerPoint presentations
• Extract images from Emails
• Extract images from PDF documents

The following example shows how to extract all images from the whole document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleImagesPdf)) {
     // Extract images
     Iterable images = parser.getImages();
     // Check if images extraction is supported
     if (images == null) {
         System.out.println("Images extraction isn't supported");
         return;
     }
     // Iterate over images
     for (PageImageArea image : images) {
         // Print a page index, rectangle and image type:
         System.out.println(String.format("Page: %d, R: %s, Type: %s", image.getPage().getIndex(), image.getRectangle(), image.getFileType()));
     }
 }
 

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageImageArea> - A collection of PageImageArea objects; null if images extraction isn’t supported.

public Iterable<PageImageArea> getImages(PageAreaOptions options)

Extracts images from the document using customization options (to set the rectangular area that contains images).

Learn more:

• Extract images from documents
• Extract images to files
• Extract images from document page area
• Extract images from Microsoft Office Word documents
• Extract images from Microsoft Office Excel spreadsheets
• Extract images from Microsoft Office PowerPoint presentations
• Extract images from Emails
• Extract images from PDF documents

The following example shows how to extract only images from the upper-left courner:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleImagesPdf)) {
     // Create the options which are used for images extraction
     PageAreaOptions options = new PageAreaOptions(new Rectangle(new Point(340, 150), new Size(300, 100)));
     // Extract images from the upper-left corner of a page:
     Iterable images = parser.getImages(options);
     // Check if images extraction is supported
     if (images == null) {
         System.out.println("Page images extraction isn't supported");
         return;
     }
     // Iterate over images
     for (PageImageArea image : images) {
         // Print a page index, rectangle and image type:
         System.out.println(String.format("Page: %d, R: %s, Type: %s", image.getPage().getIndex(), image.getRectangle(), image.getFileType()));
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageImageArea> - A collection of PageImageArea objects; null if images extraction isn’t supported.

public Iterable<PageImageArea> getImages(int pageIndex)

Extracts images from the document page.

Learn more:

• Extract images from documents
• Extract images to files
• Extract images from document page
• Extract images from Microsoft Office Word documents
• Extract images from Microsoft Office Excel spreadsheets
• Extract images from Microsoft Office PowerPoint presentations
• Extract images from Emails
• Extract images from PDF documents

To extract images from a document page the following method is used:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleImagesPdf)) {
     // Check if the document supports images extraction
     if (!parser.getFeatures().isImages()) {
         System.out.println("Document isn't supports images extraction.");
         return;
     }
     // Get the document info
     IDocumentInfo documentInfo = parser.getDocumentInfo();
     // Check if the document has pages
     if (documentInfo.getPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Iterate over pages
     for (int pageIndex = 0; pageIndex < documentInfo.getPageCount(); pageIndex++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", pageIndex + 1, documentInfo.getPageCount()));
         // Iterate over images
         // We ignore null-checking as we have checked images extraction feature support earlier
         for (PageImageArea image : parser.getImages(pageIndex)) {
             // Print a rectangle and image type
             System.out.println(String.format("R: %s, Text: %s", image.getRectangle(), image.getFileType()));
         }
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageImageArea> - A collection of PageImageArea objects; null if images extraction isn’t supported.

public Iterable<PageImageArea> getImages(int pageIndex, PageAreaOptions options)

Extracts images from the document page using customization options (to set the rectangular area that contains images).

Learn more:

• Extract images from documents
• Extract images to files
• Extract images from document page
• Extract images from document page area
• Extract images from Microsoft Office Word documents
• Extract images from Microsoft Office Excel spreadsheets
• Extract images from Microsoft Office PowerPoint presentations
• Extract images from Emails
• Extract images from PDF documents

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageImageArea> - A collection of PageImageArea objects; null if images extraction isn’t supported.

public Iterable<PageHyperlinkArea> getHyperlinks()

Extracts hyperlinks from the document.

The following example shows how to extract all hyperlinks from the whole document:

// Create an instance of Parser class
 try (Parser parser = new Parser(filePath)) {
     // Check if the document supports hyperlink extraction
     if (!parser.getFeatures().isHyperlinks()) {
         System.out.println("Document isn't supports hyperlink extraction.");
         return;
     }
     // Extract hyperlinks from the document
     Iterable hyperlinks = parser.getHyperlinks();
     // Iterate over hyperlinks
     for (PageHyperlinkArea h : hyperlinks) {
         // Print the hyperlink text
         System.out.println(h.getText());
         // Print the hyperlink URL
         System.out.println(h.getUrl());
         System.out.println();
     }
 }
 

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageHyperlinkArea> - A collection of PageHyperlinkArea objects; null if hyperlinks extraction isn’t supported.

public Iterable<PageHyperlinkArea> getHyperlinks(int pageIndex)

Extracts hyperlinks from the document page.

The following example shows how to extract hyperlinks from the document page:

// Create an instance of Parser class
 try (Parser parser = new Parser(filePath)) {
     // Check if the document supports hyperlink extraction
     if (!parser.getFeatures().isHyperlinks()) {
         System.out.println("Document isn't supports hyperlink extraction.");
         return;
     }
     // Get the document info
     IDocumentInfo documentInfo = parser.getDocumentInfo();
     // Check if the document has pages
     if (documentInfo.getPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Iterate over pages
     for (int pageIndex = 0; pageIndex < documentInfo.getPageCount(); pageIndex++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", pageIndex + 1, documentInfo.getPageCount()));
         // Extract hyperlinks from the document page
         Iterable hyperlinks = parser.getHyperlinks(pageIndex);
         // Iterate over hyperlinks
         for (PageHyperlinkArea h : hyperlinks) {
             // Print the hyperlink text
             System.out.println(h.getText());
             // Print the hyperlink URL
             System.out.println(h.getUrl());
             System.out.println();
         }
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageHyperlinkArea> - A collection of PageHyperlinkArea objects; null if hyperlinks extraction isn’t supported.

public Iterable<PageHyperlinkArea> getHyperlinks(PageAreaOptions options)

Extracts hyperlinks from the document using customization options (to set the rectangular area that contains hyperlinks).

The following example shows how to extract hyperlinks from the document page area:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.HyperlinksPdf)) {
     // Check if the document supports hyperlink extraction
     if (!parser.getFeatures().isHyperlinks()) {
         System.out.println("Document isn't supports hyperlink extraction.");
         return;
     }
     // Create the options which are used for hyperlink extraction
     PageAreaOptions options = new PageAreaOptions(new Rectangle(new Point(380, 90), new Size(150, 50)));
     // Extract hyperlinks from the document page area
     Iterable hyperlinks = parser.getHyperlinks(options);
     // Iterate over hyperlinks
     for (PageHyperlinkArea h : hyperlinks) {
         // Print the hyperlink text
         System.out.println(h.getText());
         // Print the hyperlink URL
         System.out.println(h.getUrl());
         System.out.println();
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageHyperlinkArea> - A collection of PageHyperlinkArea objects; null if hyperlinks extraction isn’t supported.

public Iterable<PageHyperlinkArea> getHyperlinks(int pageIndex, PageAreaOptions options)

Extracts hyperlinks from the document page using customization options (to set the rectangular area that contains hyperlinks).

The following example shows how to extract hyperlinks from the document page area using customization options:

// Create an instance of Parser class
 try (Parser parser = new Parser(filePath)) {
     // Check if the document supports hyperlink extraction
     if (!parser.getFeatures().isHyperlinks()) {
         System.out.println("Document isn't supports hyperlink extraction.");
         return;
     }
     // Get the document info
     IDocumentInfo documentInfo = parser.getDocumentInfo();
     // Check if the document has pages
     if (documentInfo.getPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Create the options which are used for hyperlink extraction
     PageAreaOptions options = new PageAreaOptions(new Rectangle(new Point(380, 90), new Size(150, 50)));
     // Iterate over pages
     for (int pageIndex = 0; pageIndex < documentInfo.getPageCount(); pageIndex++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", pageIndex + 1, documentInfo.getPageCount()));
         // Extract hyperlinks from the document page
         Iterable hyperlinks = parser.getHyperlinks(pageIndex, options);
         // Iterate over hyperlinks
         for (PageHyperlinkArea h : hyperlinks) {
             // Print the hyperlink text
             System.out.println(h.getText());
             // Print the hyperlink URL
             System.out.println(h.getUrl());
             System.out.println();
         }
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageHyperlinkArea> - A collection of PageHyperlinkArea objects; null if hyperlinks extraction isn’t supported.

public Iterable<PageBarcodeArea> getBarcodes()

Extracts barcodes from the document.

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageBarcodeArea> - A collection of PageBarcodeArea objects; null if barcodes extraction isn’t supported.

public Iterable<PageBarcodeArea> getBarcodes(int pageIndex)

Extracts barcodes from the document page.

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageBarcodeArea> - A collection of PageBarcodeArea objects; null if barcodes extraction isn’t supported.

public Iterable<PageBarcodeArea> getBarcodes(BarcodeOptions options)

Extracts barcodes from the document using customization options (to set the rectangular area that contains barcodes).

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageBarcodeArea> - A collection of PageBarcodeArea objects; null if barcodes extraction isn’t supported.\

public Iterable<PageBarcodeArea> getBarcodes(int pageIndex, BarcodeOptions options)

Extracts barcodes from the document page using customization options (to set the rectangular area that contains barcodes).

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageBarcodeArea> - A collection of PageBarcodeArea objects; null if barcodes extraction isn’t supported.

public Iterable<PageTableArea> getTables(PageTableAreaOptions options)

Extracts tables from the document.

The following example shows how to extract tables from the whole document:

// Create an instance of Parser class
 try (Parser parser = new Parser(filePath)) {
     // Check if the document supports table extraction
     if (!parser.getFeatures().isTables()) {
         System.out.println("Document isn't supports tables extraction.");
         return;
     }
     // Create the layout of tables
     TemplateTableLayout layout = new TemplateTableLayout(
             java.util.Arrays.asList(new Double[]{50.0, 95.0, 275.0, 415.0, 485.0, 545.0}),
             java.util.Arrays.asList(new Double[]{325.0, 340.0, 365.0, 395.0}));
     // Create the options for table extraction
     PageTableAreaOptions options = new PageTableAreaOptions(layout);
     // Extract tables from the document
     Iterable tables = parser.getTables(options);
     // Iterate over tables
     for (PageTableArea t : tables) {
         // Iterate over rows
         for (int row = 0; row < t.getRowCount(); row++) {
             // Iterate over columns
             for (int column = 0; column < t.getColumnCount(); column++) {
                 // Get the table cell
                 PageTableAreaCell cell = t.getCell(row, column);
                 if (cell != null) {
                     // Print the table cell text
                     System.out.print(cell.getText());
                     System.out.print(" | ");
                 }
             }
             System.out.println();
         }
         System.out.println();
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTableArea> - A collection of PageTableArea objects; null if tables extraction isn’t supported.

public Iterable<PageTableArea> getTables()

Extracts tables from the document, detecting them automatically.

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTableArea> - A collection of PageTableArea objects; null if tables extraction isn’t supported.

public Iterable<PageTableArea> getTables(int pageIndex, PageTableAreaOptions options)

Extracts tables from the document page.

The following example shows how to extract tables from the document page:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleInvoicePagesPdf)) {
     // Check if the document supports table extraction
     if (!parser.getFeatures().isTables()) {
         System.out.println("Document isn't supports tables extraction.");
         return;
     }
     // Create the layout of tables
     TemplateTableLayout layout = new TemplateTableLayout(
             java.util.Arrays.asList(new Double[]{50.0, 95.0, 275.0, 415.0, 485.0, 545.0}),
             java.util.Arrays.asList(new Double[]{325.0, 340.0, 365.0, 395.0}));
     // Create the options for table extraction
     PageTableAreaOptions options = new PageTableAreaOptions(layout);
     // Get the document info
     IDocumentInfo documentInfo = parser.getDocumentInfo();
     // Check if the document has pages
     if (documentInfo.getPageCount() == 0) {
         System.out.println("Document hasn't pages.");
         return;
     }
     // Iterate over pages
     for (int pageIndex = 0; pageIndex < documentInfo.getPageCount(); pageIndex++) {
         // Print a page number
         System.out.println(String.format("Page %d/%d", pageIndex + 1, documentInfo.getPageCount()));
         // Extract tables from the document page
         Iterable tables = parser.getTables(pageIndex, options);
         // Iterate over tables
         for (PageTableArea t : tables) {
             // Iterate over rows
             for (int row = 0; row < t.getRowCount(); row++) {
                 // Iterate over columns
                 for (int column = 0; column < t.getColumnCount(); column++) {
                     // Get the table cell
                     PageTableAreaCell cell = t.getCell(row, column);
                     if (cell != null) {
                         // Print the table cell text
                         System.out.print(cell.getText());
                         System.out.print(" | ");
                     }
                 }
                 System.out.println();
             }
             System.out.println();
         }
     }
 }
 

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTableArea> - A collection of PageTableArea objects; null if tables extraction isn’t supported.

public Iterable<PageTableArea> getTables(int pageIndex)

Extracts tables from the document page, detecting them automatically.

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.PageTableArea> - A collection of PageTableArea objects; null if tables extraction isn’t supported.

public Iterable<TemplateItem> generateAdjustmentFields(GenerateTemplateOptions options)

Generates a collection of adjustment TemplateItems for the document.

Java mirror of the C# Parser.GenerateAdjustmentFields(GenerateTemplateOptions) API (commits d4e691b / ae9e98c). Useful as a starting-point template that the user can then trim or rename.

1. Pick the page from options.getPageIndex() (default 0 ).
2. If the document supports text-area extraction, call #getTextAreas(int, com.groupdocs.parser.options.PageTextAreaOptions).getTextAreas(int, com.groupdocs.parser.options.PageTextAreaOptions) and emit one TemplateField per non-empty text area, named {prefix}_{n} (default prefix “Field” ). Each field gets a TemplateFixedPosition at the text area’s rectangle, with the page’s width recorded as pageWidth so subsequent template scaling works.
3. If the document does not support text areas, return null .

The C# implementation runs OCR over the page preview to derive fields when the document is image-only. Java’s OcrConnectorBase is user-supplied, so OCR-driven generation is only meaningful if a connector is configured AND the connector’s recognizeTextAreas(…) returns proper rectangles. When options.getOcrOptions() is set and a connector is available, the OCR pipeline is preferred.

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.templates.TemplateItem> - An iterable of generated TemplateItems, or null if not supported by this document format.

public Iterable<WorksheetInfo> getWorksheetInfo()

Extracts the info about all worksheets in the spreadsheet.

Returns: java.lang.Iterable<com.groupdocs.parser.data.WorksheetInfo> - A list of WorksheetInfo instances that contains info about all worksheets in the spreadsheet.

public WorksheetInfo getWorksheetInfo(int worksheetIndex)

Extracts the info about the worksheet.

Parameters:

Returns: WorksheetInfo - An instance of WorksheetInfo that contains the info about the worksheet.

public Iterable<WorksheetCell> getWorksheetCells(int worksheetIndex)

Extracts worksheet cells.

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.WorksheetCell> - A collection of WorksheetCell instances that contains the cell data.

public Iterable<WorksheetCell> getWorksheetCells(int worksheetIndex, WorksheetOptions options)

Extracts worksheet cells using customization options.

Parameters:

Returns: java.lang.Iterable<com.groupdocs.parser.data.WorksheetCell> - A collection of WorksheetCell instances that contains the cell data.

public DocumentData parseByTemplate(Template template)

Parses the document by the user-generated template.

Learn more:

• Parse data from documents
• Working with templates
• Working with data extracted by template
• Parse data from PDF documents

Parameters:

Returns: DocumentData - An instance of DocumentData class that contains the extracted data; null if parsing by template isn’t supported.

public DocumentData parseByTemplate(Template template, ParseByTemplateOptions options)

Parses the document by the user-generated template with the supplied options.

If options.getPageIndex() is set, only that page is parsed; otherwise all pages are parsed.

OCR support depends on the OcrConnectorBase configured in ParserSettings.

Parameters:

Returns: DocumentData - An instance of DocumentData class that contains the extracted data; null if parsing by template isn’t supported.

public DocumentData parseByTemplate(TemplateCollection templates, ParseByTemplateOptions options)

Parses the document by automatically selecting the best-matching template from a collection.

Mirror of the C# Parser.ParseByTemplate(TemplateCollection, ParseByTemplateOptions) introduced in commit 71f3f21.

Selection heuristic (Java port): each candidate template is applied via #parseByTemplate(Template, com.groupdocs.parser.options.ParseByTemplateOptions).parseByTemplate(Template, com.groupdocs.parser.options.ParseByTemplateOptions), and the template that yields the highest number of populated fields (non-null page areas with non-empty text) wins. The C# implementation uses hidden-marker matching against an OCR pass; that path is not yet available in Java because hidden-field markers and the OCR-driven TemplatePageOcrParser aren’t ported, so this populated-field count is used as a transparent fallback. Callers that need C#-identical behavior should plug in a custom selector once the OCR engine is wired.

Parameters:

Returns: DocumentData - The extracted data with DocumentData.getTemplate() set to the selected template, or null if the document does not support parsing-by-template or the collection is empty / produced no result.

public DocumentData parseForm()

Parses the document form.

Learn more:

• Extract data from PDF forms
• Working with data extracted by template
• Parse data from PDF documents

The following example shows how to parse a form of the document:

// Create an instance of Parser class
 try (Parser parser = new Parser(Constants.SampleFormsPdf)) {
     // Extract data from PDF document
     DocumentData data = parser.parseForm();
     // Check if form extraction is supported
     if (data == null) {
         System.out.println("Form extraction isn't supported.");
         return;
     }
     // Iterate over extracted data
     for (int i = 0; i < data.getCount(); i++) {
         System.out.print(data.get(i).getName() + ": ");
         PageTextArea area = data.get(i).getPageArea() instanceof PageTextArea
                 ? (PageTextArea) data.get(i).getPageArea()
                 : null;
         System.out.println(area == null ? "Not a template field" : area.getText());
     }
 }
 

Returns: DocumentData - An instance of DocumentData class that contains the extracted data; null if parsing by template isn’t supported.

public Document getStructure()

Extracts a structured text from the document.

Learn more:

• Extract text structure

Returns: org.w3c.dom.Document - An instance of org.w3c.dom.Document class with XML text structure; null if text structure extraction isn’t supported.

public void close()

Closes this resource, relinquishing any underlying resources.