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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.pdmodel.graphics.color;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.pdmodel.common.COSObjectable;
import java.io.IOException;
import java.awt.color.ColorSpace;
import java.awt.image.ColorModel;
/**
* This class represents a color space in a pdf document.
*
* @author Ben Litchfield
* @version $Revision: 1.5 $
*/
public abstract class PDColorSpace implements COSObjectable
{
/**
* array for the given parameters.
*/
protected COSArray array;
/**
* Cached Java AWT color space.
*
* @see #getJavaColorSpace()
*/
private ColorSpace colorSpace = null;
/**
* This will return the name of the color space.
*
* @return The name of the color space.
*/
public abstract String getName();
/**
* This will get the number of components that this color space is made up of.
*
* @return The number of components in this color space.
*
* @throws IOException If there is an error getting the number of color components.
*/
public abstract int getNumberOfComponents() throws IOException;
/**
* Convert this standard java object to a COS object.
*
* @return The cos object that matches this Java object.
*/
public COSBase getCOSObject()
{
return COSName.getPDFName( getName() );
}
/**
* Returns the Java AWT color space for this instance.
*
* @return Java AWT color space
* @throws IOException if the color space can not be created
*/
public ColorSpace getJavaColorSpace() throws IOException {
if (colorSpace == null) {
colorSpace = createColorSpace();
}
return colorSpace;
}
/**
* Create a Java colorspace for this colorspace.
*
* @return A color space that can be used for Java AWT operations.
*
* @throws IOException If there is an error creating the color space.
*/
protected abstract ColorSpace createColorSpace() throws IOException;
/**
* Create a Java color model for this colorspace.
*
* @param bpc The number of bits per component.
*
* @return A color model that can be used for Java AWT operations.
*
* @throws IOException If there is an error creating the color model.
*/
public abstract ColorModel createColorModel( int bpc ) throws IOException;
/*
Don't just tell me its color type -- tell me its contents!
*/
/**
* {@inheritDoc}
*/
public String toString()
{
return getName() + "{ " + (array==null? "" : array.toString() ) + " }";
}
}