Initial import of release 2.2.REL-2.2@923

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

1 files changed, 207 insertions, 0 deletions

diff --git a/src/main/java/org/pdfbox/pdmodel/graphics/xobject/PDXObject.java b/src/main/java/org/pdfbox/pdmodel/graphics/xobject/PDXObject.java
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+/**

+ * Copyright (c) 2005, 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.pdmodel.graphics.xobject;

+

+import java.io.IOException;

+import java.util.List;

+

+import org.pdfbox.cos.COSBase;

+import org.pdfbox.cos.COSName;

+import org.pdfbox.cos.COSStream;

+

+import org.pdfbox.pdmodel.PDDocument;

+import org.pdfbox.pdmodel.common.COSObjectable;

+import org.pdfbox.pdmodel.common.PDMetadata;

+import org.pdfbox.pdmodel.common.PDStream;

+

+/**

+ * The base class for all XObjects in the PDF document.

+ * 

+ * @author Ben Litchfield (ben@benlitchfield.com)

+ * @author mathiak

+ * @author Marcel Kammer

+ * @version $Revision: 1.12 $

+ */

+public abstract class PDXObject implements COSObjectable 

+{

+    private PDStream xobject;

+    

+    /**

+     * Standard constuctor. 

+     * 

+     * @param xobj The XObject dictionary.

+     */

+    public PDXObject(COSStream xobj) 

+    {

+        xobject = new PDStream( xobj );

+    }

+    

+    /**

+     * Standard constuctor. 

+     * 

+     * @param xobj The XObject dictionary.

+     */

+    public PDXObject(PDStream xobj) 

+    {

+        xobject = xobj;

+    }

+    

+    /**

+     * Standard constuctor. 

+     * 

+     * @param doc The doc to store the object contents.

+     */

+    public PDXObject(PDDocument doc) 

+    {

+        xobject = new PDStream(doc);

+        xobject.getStream().setName( COSName.TYPE, "XObject" );

+    }

+    

+    /**

+     * Returns the stream. 

+     * @see org.pdfbox.pdmodel.common.COSObjectable#getCOSObject()

+     */

+    public COSBase getCOSObject() 

+    {

+        return xobject.getCOSObject();

+    }

+    

+    /**

+     * Returns the stream. 

+     * @return The stream for this object.

+     */

+    public COSStream getCOSStream() 

+    {

+        return xobject.getStream();

+    }

+    

+    /**

+     * Returns the stream. 

+     * @return The stream for this object.

+     */

+    public PDStream getPDStream() 

+    {

+        return xobject;

+    }

+    

+    /**

+     * Create the correct xobject from the cos base.

+     * 

+     * @param xobject The cos level xobject to create.

+     * 

+     * @return a pdmodel xobject

+     * @throws IOException If there is an error creating the xobject.

+     */

+    public static PDXObject createXObject( COSBase xobject ) throws IOException

+    {

+        PDXObject retval = null;

+        if( xobject == null )

+        {

+            retval = null;

+        }

+        else if( xobject instanceof COSStream )

+        {

+            COSStream xstream = (COSStream)xobject;

+            String subtype = xstream.getNameAsString( "Subtype" ); 

+            if( subtype.equals( PDXObjectImage.SUB_TYPE ) )

+            {

+                PDStream image = new PDStream( xstream );

+                // See if filters are DCT or JPX otherwise treat as Bitmap-like

+                // There might be a problem with several filters, but that's ToDo until

+                // I find an example 

+                List filters = image.getFilters();

+                if( filters != null && filters.contains( COSName.DCT_DECODE.getName() ) ) 

+                {

+                    return new PDJpeg(image);

+                } 

+                else if ( filters != null && filters.contains( COSName.CCITTFAX_DECODE.getName() ) )

+                {

+                    return new PDCcitt(image);

+                }

+                else if( filters != null && filters.contains(COSName.JPX_DECODE.getName()))

+                {

+                    //throw new IOException( "JPXDecode has not been implemented for images" );

+                    //JPX Decode is not really supported right now, but if we are just doing

+                    //text extraction then we don't want to throw an exception, so for now

+                    //just return a PDPixelMap, which will break later on if it is 

+                    //actually used, but for text extraction it is not used.

+                    return new PDPixelMap( image );

+                    

+                } 

+                else 

+                {

+                    retval = new PDPixelMap(image);

+                }

+            }

+            else if( subtype.equals( PDXObjectForm.SUB_TYPE ) )

+            {

+                retval = new PDXObjectForm( xstream );

+            }

+            else

+            {

+                throw new IOException( "Unknown xobject subtype '" + subtype + "'" );

+            }

+        }

+        else

+        {

+            throw new IOException( "Unknown xobject type:" + xobject.getClass().getName() );

+        }

+        

+        return retval;

+    }

+    

+    /**

+     * Get the metadata that is part of the document catalog.  This will 

+     * return null if there is no meta data for this object.

+     * 

+     * @return The metadata for this object.

+     */

+    public PDMetadata getMetadata()

+    {

+        PDMetadata retval = null;

+        COSStream mdStream = (COSStream)xobject.getStream().getDictionaryObject( "Metadata" );

+        if( mdStream != null )

+        {

+            retval = new PDMetadata( mdStream );

+        }

+        return retval;

+    }

+    

+    /**

+     * Set the metadata for this object.  This can be null.

+     * 

+     * @param meta The meta data for this object.

+     */

+    public void setMetadata( PDMetadata meta )

+    {

+        xobject.getStream().setItem( "Metadata", meta );

+    }

+}