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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* 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.contentstream.operator.graphics;
import java.io.IOException;
import java.util.List;
import org.apache.pdfbox.contentstream.operator.MissingOperandException;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.MissingResourceException;
import org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject;
import org.apache.pdfbox.pdmodel.graphics.form.PDTransparencyGroup;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
import org.apache.pdfbox.pdmodel.graphics.PDXObject;
import org.apache.pdfbox.contentstream.operator.Operator;
/**
* Do: Draws an XObject.
*
* @author Ben Litchfield
* @author John Hewson
*/
public final class DrawObject extends GraphicsOperatorProcessor
{
@Override
public void process(Operator operator, List operands) throws IOException
{
if (operands.size() < 1)
{
throw new MissingOperandException(operator, operands);
}
COSBase base0 = operands.get(0);
if (!(base0 instanceof COSName))
{
return;
}
COSName objectName = (COSName) base0;
PDXObject xobject = context.getResources().getXObject(objectName);
if (xobject == null)
{
throw new MissingResourceException("Missing XObject: " + objectName.getName());
}
else if (xobject instanceof PDImageXObject)
{
PDImageXObject image = (PDImageXObject)xobject;
context.drawImage(image);
}
else if (xobject instanceof PDTransparencyGroup)
{
getContext().showTransparencyGroup((PDTransparencyGroup) xobject);
}
else if (xobject instanceof PDFormXObject)
{
getContext().showForm((PDFormXObject) xobject);
}
}
@Override
public String getName()
{
return "Do";
}
}