| PDFAnnotation | 
 This class represents a PDF annotation (like a hyperlink). 
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| PDFAnnotation.Link | 
 An inner class (and annotation subclass) to support hyperlinks. 
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| PDFBuffer | 
 This class is like a StringBuffer, but for creating PDF files instead of strings. 
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| PDFEncryptor | 
 The PDFEncyptor is a subclass of PDFSecurityHandler that is used
 to encrypt strings and streams for pdf output. 
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| PDFFile | 
 This class represents a PDF file. 
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| PDFImages | 
 This class handles writing images to a PDF file. 
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| PDFPage | 
 All drawing happens in PDFPage object. 
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| PDFPageBuffer | 
 This class is a subclass of PDFBuffer, that knows how to write an RMPage and its shapes. 
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| PDFPagesTree | 
 This class represents a pages tree in a PDF file. 
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| PDFStream | 
 This class represents a PDF stream object. 
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| PDFText | 
 This class generates PDF for an RMText. 
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| PDFText.FontEntry | 
 An inner class to store font info. 
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| PDFXEntry | 
 An inner class for XRef Table entries. 
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| PDFXTable | 
 This class represents a cross reference table in a PDF file. 
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