/*

 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package com.sun.imageio.plugins.common;

import java.awt.color.ColorSpace;

/**

 * A dummy <code>ColorSpace</code> to enable <code>ColorModel</code>

 * for image data which do not have an innate color representation.

 */

public class BogusColorSpace extends ColorSpace {

    /**

     * Return the type given the number of components.

     *

     * @param numComponents The number of components in the

     * <code>ColorSpace</code>.

     * @exception IllegalArgumentException if <code>numComponents</code>

     * is less than 1.

     */

    private static int getType(int numComponents) {

        if(numComponents < 1) {

            throw new IllegalArgumentException("numComponents < 1!");

        }

        int type;

        switch(numComponents) {

        case 1:

            type = ColorSpace.TYPE_GRAY;

            break;

        default:

            // Based on the constant definitions TYPE_2CLR=12 through

            // TYPE_FCLR=25. This will return unknown types for

            // numComponents > 15.

            type = numComponents + 10;

        }

        return type;

    }

    /**

     * Constructs a bogus <code>ColorSpace</code>.

     *

     * @param numComponents The number of components in the

     * <code>ColorSpace</code>.

     * @exception IllegalArgumentException if <code>numComponents</code>

     * is less than 1.

     */

    public BogusColorSpace(int numComponents) {

        super(getType(numComponents), numComponents);

    }

    //

    // The following methods simply copy the input array to the

    // output array while otherwise attempting to adhere to the

    // specified behavior of the methods vis-a-vis exceptions.

    //

    public float[] toRGB(float[] colorvalue) {

        if(colorvalue.length < getNumComponents()) {

            throw new ArrayIndexOutOfBoundsException

                ("colorvalue.length < getNumComponents()");

        }

        float[] rgbvalue = new float[3];

        System.arraycopy(colorvalue, 0, rgbvalue, 0,

                         Math.min(3, getNumComponents()));

        return colorvalue;

    }

    public float[] fromRGB(float[] rgbvalue) {

        if(rgbvalue.length < 3) {

            throw new ArrayIndexOutOfBoundsException

                ("rgbvalue.length < 3");

        }

        float[] colorvalue = new float[getNumComponents()];

        System.arraycopy(rgbvalue, 0, colorvalue, 0,

                         Math.min(3, colorvalue.length));

        return rgbvalue;

    }

    public float[] toCIEXYZ(float[] colorvalue) {

        if(colorvalue.length < getNumComponents()) {

            throw new ArrayIndexOutOfBoundsException

                ("colorvalue.length < getNumComponents()");

        }

        float[] xyzvalue = new float[3];

        System.arraycopy(colorvalue, 0, xyzvalue, 0,

                         Math.min(3, getNumComponents()));

        return colorvalue;

    }

    public float[] fromCIEXYZ(float[] xyzvalue) {

        if(xyzvalue.length < 3) {

            throw new ArrayIndexOutOfBoundsException

                ("xyzvalue.length < 3");

        }

        float[] colorvalue = new float[getNumComponents()];

        System.arraycopy(xyzvalue, 0, colorvalue, 0,

                         Math.min(3, colorvalue.length));

        return xyzvalue;

    }

}