# PDTristimulus.java

    /*
     * 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.COSBase;
    import org.apache.pdfbox.cos.COSFloat;
    import org.apache.pdfbox.cos.COSNumber;

    import org.apache.pdfbox.pdmodel.common.COSObjectable;

    /**
     * A tristimulus, or collection of three floating point parameters used for color operations.
     *
     * @author Ben Litchfield
     */
    public final class PDTristimulus implements COSObjectable
    {
        private final COSArray values;

        /**
         * Constructor. Defaults all values to 0, 0, 0.
         */
        public PDTristimulus()
        {
            values = new COSArray();
            values.add(new COSFloat(0.0f));
            values.add(new COSFloat(0.0f));
            values.add(new COSFloat(0.0f));
        }

        /**
         * Constructor from COS object.
         * @param array the array containing the XYZ values
         */
        public PDTristimulus(COSArray array)
        {
            values = array;
        }

        /**
         * Constructor from COS object.
         * @param array the array containing the XYZ values
         */
        public PDTristimulus(float[] array)
        {
            values = new COSArray();
            for(int i=0; i<array.length && i<3; i++)
            {
                values.add(new COSFloat(array[i]));
            }
        }

        /**
         * Convert this standard java object to a COS object.
         * @return the cos object that matches this Java object
         */
        @Override
        public COSBase getCOSObject()
        {
            return values;
        }

        /**
         * Returns the x value of the tristimulus.
         * @return the X value
         */
        public float getX()
        {
            return ((COSNumber)values.get(0)).floatValue();
        }

        /**
         * Sets the x value of the tristimulus.
         * @param x the x value for the tristimulus
         */
        public void setX(float x)
        {
            values.set(0, new COSFloat(x));
        }

        /**
         * Returns the y value of the tristimulus.
         * @return the Y value
         */
        public float getY()
        {
            return ((COSNumber)values.get(1)).floatValue();
        }

        /**
         * Sets the y value of the tristimulus.
         * @param y the y value for the tristimulus
         */
        public void setY(float y)
        {
            values.set(1, new COSFloat(y));
        }

        /**
         * Returns the z value of the tristimulus.
         * @return the Z value
         */
        public float getZ()
        {
            return ((COSNumber)values.get(2)).floatValue();
        }

        /**
         * Sets the z value of the tristimulus.
         * @param z the z value for the tristimulus
         */
        public void setZ(float z)
        {
            values.set(2, new COSFloat(z));
        }
    }