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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.color;
import org.apache.pdfbox.contentstream.operator.MissingOperandException;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.pdmodel.graphics.color.PDColor;
import org.apache.pdfbox.pdmodel.graphics.color.PDColorSpace;
import org.apache.pdfbox.contentstream.operator.Operator;
import org.apache.pdfbox.contentstream.operator.OperatorProcessor;
import java.io.IOException;
import java.util.List;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceColorSpace;
/**
* sc,scn,SC,SCN: Sets the color to use for stroking or non-stroking operations.
*
* @author John Hewson
*/
public abstract class SetColor extends OperatorProcessor
{
@Override
public void process(Operator operator, List arguments) throws IOException
{
PDColorSpace colorSpace = getColorSpace();
if (colorSpace instanceof PDDeviceColorSpace &&
arguments.size() < colorSpace.getNumberOfComponents())
{
throw new MissingOperandException(operator, arguments);
}
COSArray array = new COSArray();
array.addAll(arguments);
setColor(new PDColor(array, colorSpace));
}
/**
* Returns either the stroking or non-stroking color value.
* @return The stroking or non-stroking color value.
*/
protected abstract PDColor getColor();
/**
* Sets either the stroking or non-stroking color value.
* @param color The stroking or non-stroking color value.
*/
protected abstract void setColor(PDColor color);
/**
* Returns either the stroking or non-stroking color space.
* @return The stroking or non-stroking color space.
*/
protected abstract PDColorSpace getColorSpace();
}