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package org.pdfbox.pdmodel;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.pdfbox.cos.COSBase;
import org.pdfbox.cos.COSDictionary;
import org.pdfbox.cos.COSName;
import org.pdfbox.cos.COSStream;
import org.pdfbox.pdmodel.common.COSDictionaryMap;
import org.pdfbox.pdmodel.common.COSObjectable;
import org.pdfbox.pdmodel.font.PDFontFactory;
import org.pdfbox.pdmodel.graphics.PDExtendedGraphicsState;
import org.pdfbox.pdmodel.graphics.color.PDColorSpaceFactory;
import org.pdfbox.pdmodel.graphics.xobject.PDXObject;
import org.pdfbox.pdmodel.graphics.xobject.PDXObjectImage;
/**
* This represents a set of resources available at the page/pages/stream level.
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @version $Revision: 1.16 $
*/
public class PDResources implements COSObjectable
{
private COSDictionary resources;
/**
* Default constructor.
*/
public PDResources()
{
resources = new COSDictionary();
}
/**
* Prepopulated resources.
*
* @param resourceDictionary The cos dictionary for this resource.
*/
public PDResources( COSDictionary resourceDictionary )
{
resources = resourceDictionary;
}
/**
* This will get the underlying dictionary.
*
* @return The dictionary for these resources.
*/
public COSDictionary getCOSDictionary()
{
return resources;
}
/**
* Convert this standard java object to a COS object.
*
* @return The cos object that matches this Java object.
*/
public COSBase getCOSObject()
{
return resources;
}
/**
* This will get the map of fonts. This will never return null. The keys are string
* and the values are PDFont objects.
*
* @param fontCache A map of existing PDFont objects to reuse.
* @return The map of fonts.
*
* @throws IOException If there is an error getting the fonts.
*/
public Map getFonts( Map fontCache ) throws IOException
{
Map retval = null;
COSDictionary fonts = (COSDictionary)resources.getDictionaryObject( COSName.FONT );
if( fonts == null )
{
fonts = new COSDictionary();
resources.setItem( COSName.FONT, fonts );
}
Map actuals = new HashMap();
retval = new COSDictionaryMap( actuals, fonts );
Iterator fontNames = fonts.keyList().iterator();
while( fontNames.hasNext() )
{
COSName fontName = (COSName)fontNames.next();
COSBase font = fonts.getDictionaryObject( fontName );
//data-000174.pdf contains a font that is a COSArray, looks to be an error in the
//PDF, we will just ignore entries that are not dictionaries.
if( font instanceof COSDictionary )
{
COSDictionary fontDictionary = (COSDictionary)font;
actuals.put( fontName.getName(), PDFontFactory.createFont( fontDictionary, fontCache ) );
}
}
return retval;
}
/**
* This will get the map of fonts. This will never return null. The keys are string
* and the values are PDFont objects.
*
* @return The map of fonts.
*
* @throws IOException If there is an error getting the fonts.
*/
public Map getFonts() throws IOException
{
return getFonts( null );
}
/**
* This will get the map of PDXObjects that are in the resource dictionary.
*
* @return The map of xobjects.
*
* @throws IOException If there is an error creating the xobjects.
*/
public Map getXObjects() throws IOException
{
Map retval = null;
COSDictionary xobjects = (COSDictionary)resources.getDictionaryObject( "XObject" );
if( xobjects == null )
{
xobjects = new COSDictionary();
resources.setItem( "XObject", xobjects );
}
Map actuals = new HashMap();
retval = new COSDictionaryMap( actuals, xobjects );
Iterator imageNames = xobjects.keyList().iterator();
while( imageNames.hasNext() )
{
COSName objName = (COSName)imageNames.next();
COSBase cosObject = xobjects.getDictionaryObject(objName);
PDXObject xobject = PDXObject.createXObject( cosObject );
if( xobject !=null )
{
actuals.put( objName.getName(), xobject);
}
}
return retval;
}
/**
* This will get the map of images. An empty map will be returned if there
* are no underlying images.
* So far the keys are COSName of the image
* and the value is the corresponding PDXObjectImage.
*
* @author By BM
* @return The map of images.
* @throws IOException If there is an error writing the picture.
*/
public Map getImages() throws IOException
{
Map retval = null;
COSDictionary images = (COSDictionary)resources.getDictionaryObject( "XObject" );
if( images == null )
{
images = new COSDictionary();
resources.setItem( "XObject", images );
}
Map actuals = new HashMap();
retval = new COSDictionaryMap( actuals, images );
Iterator imageNames = images.keyList().iterator();
while( imageNames.hasNext() )
{
COSName imageName = (COSName)imageNames.next();
COSStream image = (COSStream)(images.getDictionaryObject(imageName));
COSName subType =(COSName)image.getDictionaryObject(COSName.SUBTYPE);
if( subType.equals(COSName.IMAGE) )
{
PDXObjectImage ximage = (PDXObjectImage)PDXObject.createXObject( image );
if( ximage !=null )
{
actuals.put( imageName.getName(), ximage);
}
}
}
return retval;
}
/**
* This will set the map of fonts.
*
* @param fonts The new map of fonts.
*/
public void setFonts( Map fonts )
{
resources.setItem( COSName.FONT, COSDictionaryMap.convert( fonts ) );
}
/**
* This will get the map of colorspaces. This will return null if the underlying
* resources dictionary does not have a colorspace dictionary. The keys are string
* and the values are PDColorSpace objects.
*
* @return The map of colorspaces.
*
* @throws IOException If there is an error getting the colorspaces.
*/
public Map getColorSpaces() throws IOException
{
Map retval = null;
COSDictionary colorspaces = (COSDictionary)resources.getDictionaryObject( COSName.getPDFName( "ColorSpace" ) );
if( colorspaces != null )
{
Map actuals = new HashMap();
retval = new COSDictionaryMap( actuals, colorspaces );
Iterator csNames = colorspaces.keyList().iterator();
while( csNames.hasNext() )
{
COSName csName = (COSName)csNames.next();
COSBase cs = colorspaces.getDictionaryObject( csName );
actuals.put( csName.getName(), PDColorSpaceFactory.createColorSpace( cs ) );
}
}
return retval;
}
/**
* This will set the map of colorspaces.
*
* @param colorspaces The new map of colorspaces.
*/
public void setColorSpaces( Map colorspaces )
{
resources.setItem( COSName.getPDFName( "ColorSpace" ), COSDictionaryMap.convert( colorspaces ) );
}
/**
* This will get the map of graphic states. This will return null if the underlying
* resources dictionary does not have a graphics dictionary. The keys are the graphic state
* name as a String and the values are PDExtendedGraphicsState objects.
*
* @return The map of extended graphic state objects.
*/
public Map getGraphicsStates()
{
Map retval = null;
COSDictionary states = (COSDictionary)resources.getDictionaryObject( COSName.getPDFName( "ExtGState" ) );
if( states != null )
{
Map actuals = new HashMap();
retval = new COSDictionaryMap( actuals, states );
Iterator names = states.keyList().iterator();
while( names.hasNext() )
{
COSName name = (COSName)names.next();
COSDictionary dictionary = (COSDictionary)states.getDictionaryObject( name );
actuals.put( name.getName(), new PDExtendedGraphicsState( dictionary ) );
}
}
return retval;
}
/**
* This will set the map of graphics states.
*
* @param states The new map of states.
*/
public void setGraphicsStates( Map states )
{
Iterator iter = states.keySet().iterator();
COSDictionary dic = new COSDictionary();
while( iter.hasNext() )
{
String name = (String)iter.next();
PDExtendedGraphicsState state = (PDExtendedGraphicsState)states.get( name );
dic.setItem( COSName.getPDFName( name ), state.getCOSObject() );
}
resources.setItem( COSName.getPDFName( "ExtGState" ), dic );
}
}