# PDActionJavaScript.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.interactive.action;

    import org.apache.pdfbox.cos.COSBase;
    import org.apache.pdfbox.cos.COSDictionary;
    import org.apache.pdfbox.cos.COSName;
    import org.apache.pdfbox.cos.COSStream;
    import org.apache.pdfbox.cos.COSString;

    /**
     * This represents a JavaScript action.
     *
     * @author Michael Schwarzenberger
     */
    public class PDActionJavaScript extends PDAction
    {
        /**
         * This type of action this object represents.
         */
        public static final String SUB_TYPE = "JavaScript";

        /**
         * Constructor #1.
         */
        public PDActionJavaScript()
        {
            setSubType( SUB_TYPE );
        }

        /**
         * Constructor.
         *
         * @param js Some javascript code.
         */
        public PDActionJavaScript( String js )
        {
            this();
            setAction(js);
        }

        /**
         * Constructor #2.
         *
         *  @param a The action dictionary.
         */
        public PDActionJavaScript(COSDictionary a)
        {
            super(a);
        }

        /**
         * @param sAction The JavaScript.
         */
        public final void setAction(String sAction)
        {
            action.setString(COSName.JS, sAction);
        }

        /**
         * @return The Javascript Code.
         */
        public String getAction()
        {
            COSBase base = action.getDictionaryObject( COSName.JS );
            if (base instanceof COSString)
            {
                return ((COSString)base).getString();
            }
            else if (base instanceof COSStream)
            {
                return ((COSStream)base).toTextString();
            }
            else
            {
                return null;
            }
        }
    }