1 files changed, 137 insertions, 0 deletions
diff --git a/src/main/java/org/pdfbox/pdfparser/PDFObjectStreamParser.java b/src/main/java/org/pdfbox/pdfparser/PDFObjectStreamParser.java
new file mode 100644
index 0000000..6fb7563
--- /dev/null
+++ b/src/main/java/org/pdfbox/pdfparser/PDFObjectStreamParser.java
@@ -0,0 +1,137 @@
+/**
+ * Copyright (c) 2003-2004, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of pdfbox; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.pdfparser;
+
+import java.io.IOException;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.pdfbox.cos.COSBase;
+import org.pdfbox.cos.COSDocument;
+import org.pdfbox.cos.COSInteger;
+import org.pdfbox.cos.COSObject;
+import org.pdfbox.cos.COSStream;
+
+
+import org.apache.log4j.Logger;
+
+/**
+ * This will parse a PDF 1.5 object stream and extract all of the objects from the stream.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.4 $
+ */
+public class PDFObjectStreamParser extends BaseParser
+{
+    private static Logger log = Logger.getLogger(PDFObjectStreamParser.class);
+    private List streamObjects = null;
+    private List objectNumbers = null;
+    private COSStream stream;
+
+    /**
+     * Constructor.
+     *
+     * @param strm The stream to parse.
+     * @param doc The document for the current parsing.
+     *
+     * @throws IOException If there is an error initializing the stream.
+     */
+    public PDFObjectStreamParser( COSStream strm, COSDocument doc ) throws IOException
+    {
+       super( strm.getUnfilteredStream() );
+       setDocument( doc );
+       stream = strm;
+    }
+
+    /**
+     * This will parse the tokens in the stream.  This will close the
+     * stream when it is finished parsing.
+     *
+     * @throws IOException If there is an error while parsing the stream.
+     */
+    public void parse() throws IOException
+    {
+        if( log.isDebugEnabled() )
+        {
+            log.debug( "parse() start" );
+        }
+
+        try
+        {
+            //need to first parse the header.
+            int numberOfObjects = stream.getInt( "N" );
+            objectNumbers = new ArrayList( numberOfObjects );
+            streamObjects = new ArrayList( numberOfObjects );
+            for( int i=0; i<numberOfObjects; i++ )
+            {
+                int objectNumber = readInt();
+                int offset = readInt();
+                if( log.isDebugEnabled() )
+                {
+                    log.debug( "objNum:" + objectNumber + " offset:" + offset );
+                }
+                objectNumbers.add( new Integer( objectNumber ) );
+            }
+            COSObject object = null;
+            COSBase cosObject = null;
+            int objectCounter = 0;
+            while( (cosObject = parseDirObject()) != null )
+            {
+                object = new COSObject(cosObject);
+                object.setGenerationNumber( COSInteger.ZERO );
+                COSInteger objNum = 
+                    new COSInteger( ((Integer)objectNumbers.get( objectCounter)).intValue() );
+                object.setObjectNumber( objNum );
+                streamObjects.add( object );
+                objectCounter++;
+            }
+        }
+        finally
+        {
+            pdfSource.close();
+        }
+        if( log.isDebugEnabled() )
+        {
+            log.debug( "parse() end" );
+        }
+    }
+
+    /**
+     * This will get the objects that were parsed from the stream.
+     *
+     * @return All of the objects in the stream.
+     */
+    public List getObjects()
+    {
+        return streamObjects;
+    }
+}
+\ No newline at end of file