# PDTransparencyGroup.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.form;

    import org.apache.pdfbox.cos.COSStream;
    import org.apache.pdfbox.pdmodel.PDDocument;
    import org.apache.pdfbox.pdmodel.ResourceCache;
    import org.apache.pdfbox.pdmodel.common.PDStream;

    /**
     * A transparency group.
     *
     * @author John Hewson
     */
    public class PDTransparencyGroup extends PDFormXObject
    {
        /**
         * Creates a Transparency Group for reading.
         * @param stream The XObject stream
         */
        public PDTransparencyGroup(PDStream stream)
        {
            super(stream);
        }

        /**
         * Creates a Transparency Group for reading.
         * @param stream The XObject stream
         */
        public PDTransparencyGroup(COSStream stream, ResourceCache cache)
        {
            super(stream, cache);
        }

        /**
         * Creates a Transparency Group for writing, in the given document.
         * @param document The current document
         */
        public PDTransparencyGroup(PDDocument document)
        {
            super(document);
            // todo: set mandatory fields
        }
    }