package com.tom_roush.pdfbox.pdfparser;
import android.util.Log;
import com.tom_roush.pdfbox.cos.COSBase;
import com.tom_roush.pdfbox.cos.COSDictionary;
import com.tom_roush.pdfbox.cos.COSDocument;
import com.tom_roush.pdfbox.cos.COSName;
import com.tom_roush.pdfbox.io.IOUtils;
import com.tom_roush.pdfbox.io.RandomAccessBuffer;
import com.tom_roush.pdfbox.io.RandomAccessFile;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
public class FDFParser extends COSParser
{
/**
* Constructs parser for given file using memory buffer.
*
* @param filename the filename of the pdf to be parsed
*
* @throws IOException If something went wrong.
*/
public FDFParser(String filename) throws IOException
{
this(new File(filename));
}
/**
* Constructs parser for given file using given buffer for temporary
* storage.
*
* @param file the pdf to be parsed
*
* @throws IOException If something went wrong.
*/
public FDFParser(File file) throws IOException
{
super(new RandomAccessFile(file, "r"));
fileLen = file.length();
init();
}
/**
* Constructor.
*
* @param input input stream representing the pdf.
* @throws IOException If something went wrong.
*/
public FDFParser(InputStream input) throws IOException
{
super(new RandomAccessBuffer(input));
fileLen = source.length();
init();
}
private void init() throws IOException
{
String eofLookupRangeStr = System.getProperty(SYSPROP_EOFLOOKUPRANGE);
if (eofLookupRangeStr != null)
{
try
{
setEOFLookupRange(Integer.parseInt(eofLookupRangeStr));
}
catch (NumberFormatException nfe)
{
Log.w("PdfBox-Android", "System property " + SYSPROP_EOFLOOKUPRANGE
+ " does not contain an integer value, but: '" + eofLookupRangeStr + "'");
}
}
document = new COSDocument(false);
}
/**
* The initial parse will first parse only the trailer, the xrefstart and all xref tables to have a pointer (offset)
* to all the pdf's objects. It can handle linearized pdfs, which will have an xref at the end pointing to an xref
* at the beginning of the file. Last the root object is parsed.
*
* @throws IOException If something went wrong.
*/
private void initialParse() throws IOException
{
COSDictionary trailer = null;
// parse startxref
long startXRefOffset = getStartxrefOffset();
if (startXRefOffset > 0)
{
trailer = parseXref(startXRefOffset);
}
else
{
trailer = rebuildTrailer();
}
COSBase rootObject = parseTrailerValuesDynamically(trailer);
// resolve all objects
// A FDF doesn't have a catalog, all FDF fields are within the root object
if (rootObject instanceof COSDictionary)
{
parseDictObjects((COSDictionary) rootObject, (COSName[]) null);
}
initialParseDone = true;
}
/**
* This will parse the stream and populate the COSDocument object. This will close
* the stream when it is done parsing.
*
* @throws IOException If there is an error reading from the stream or corrupt data
* is found.
*/
public void parse() throws IOException
{
// set to false if all is processed
boolean exceptionOccurred = true;
try
{
if (!parseFDFHeader())
{
throw new IOException( "Error: Header doesn't contain versioninfo" );
}
initialParse();
exceptionOccurred = false;
}
finally
{
if (exceptionOccurred && document != null)
{
IOUtils.closeQuietly(document);
document = null;
}
}
}
}