/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pdfbox.util.operator;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSStream;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDResources;
import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObject;
import org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectForm;
import org.apache.pdfbox.util.PDFOperator;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
* Invoke named XObject.
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @author Mario Ivankovits
*
* @version $Revision: 1.9 $
*/
public class Invoke extends OperatorProcessor
{
//private Set inProcess = new TreeSet();
/**
* process : Do - Invoke a named xobject.
* @param operator The operator that is being executed.
* @param arguments List
*
* @throws IOException If there is an error processing this operator.
*/
public void process(PDFOperator operator, List<COSBase> arguments) throws IOException
{
COSName name = (COSName) arguments.get( 0 );
Map xobjects = context.getXObjects();
PDXObject xobject = (PDXObject) xobjects.get(name.getName());
if(xobject instanceof PDXObjectForm)
{
PDXObjectForm form = (PDXObjectForm)xobject;
COSStream invoke = (COSStream)form.getCOSObject();
PDResources pdResources = form.getResources();
PDPage page = context.getCurrentPage();
if(pdResources == null)
{
pdResources = page.findResources();
}
getContext().processSubStream( page, pdResources, invoke );
}
}
}