Only parsing object streams if they are referenced by the xref table / stream
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                 Key: PDFBOX-1099
                 URL: https://issues.apache.org/jira/browse/PDFBOX-1099
             Project: PDFBox
          Issue Type: Improvement
          Components: Parsing
            Reporter: Thomas Chojecki


Some pdf documents have objects streams and don't reference them through the 
xref table / stream. To prevent the stream parser to dereference such object 
streams, we need to implement the type 2 part (case 2) inside the 
PDFXRefStreamParser and store the objects inside a map. This will take some 
load from the stream parser (see PDFBOX-1098) and causes less failures while 
parsing a document.

A sample pdf can be get from the issue PDFBOX-1098 and a patch is coming soon. 

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