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The Apache PDFBox library is an open source Java tool for working with PDF documents.
There is a newer version: 3.0.2
/*
 * 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.COSArray;
import org.apache.pdfbox.cos.COSName;

import java.awt.color.ColorSpace;
import java.awt.image.ColorModel;

import java.io.IOException;

/**
 * This class represents a Pattern color space.
 *
 * @author Ben Litchfield
 * @version $Revision: 1.4 $
 */
public class PDPattern extends PDColorSpace
{
    private COSArray array;

    /**
     * The name of this color space.
     */
    public static final String NAME = "Pattern";

    /**
     * Default constructor.
     */
    public PDPattern()
    {
        array = new COSArray();
        array.add( COSName.PATTERN );
    }

    /**
     * Constructor.
     *
     * @param pattern The pattern array.
     */
    public PDPattern( COSArray pattern)
    {
        array = pattern;
    }

    /**
     * This will return the name of the color space.
     *
     * @return The name of the color space.
     */
    public String getName()
    {
        return NAME;
    }

    /**
     * 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 int getNumberOfComponents() throws IOException
    {
        return -1;
    }

    /**
     * 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 ColorSpace createColorSpace() throws IOException
    {
        throw new IOException( "Not implemented" );
    }

    /**
     * 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 ColorModel createColorModel( int bpc ) throws IOException
    {
        throw new IOException( "Not implemented" );
    }
}