    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements.  See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache License, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License.  You may obtain a copy of the License at
    008     *
    009     *     http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the License for the specific language governing permissions and
    015     * limitations under the License.
    016     */
    017    package org.apache.commons.scxml.env.jsp;
    018
    019    import javax.servlet.jsp.el.ELException;
    020    import javax.servlet.jsp.el.VariableResolver;
    021
    022    import org.apache.commons.scxml.Context;
    023    import org.apache.commons.scxml.env.SimpleContext;
    024
    025    /**
    026     * EL Context for SCXML interpreter.
    027     *
    028     */
    029    public class ELContext extends SimpleContext implements VariableResolver {
    030
    031        /** Serial version UID. */
    032        private static final long serialVersionUID = 1L;
    033
    034        /**
    035         * Constructor.
    036         *
    037         */
    038        public ELContext() {
    039            super();
    040        }
    041
    042        /**
    043         * Constructor.
    044         *
    045         * @param parent A parent Context, can be null
    046         */
    047        public ELContext(final Context parent) {
    048            super(parent);
    049        }
    050
    051        /**
    052         * Resolves the specified variable. Returns null if the variable is
    053         * not found.
    054         *
    055         * @param pName The variable to resolve
    056         * @return Object The value of the variable, or null, if it does not
    057         *                exist
    058         * @throws ELException While resolving the variable
    059         * @see javax.servlet.jsp.el.VariableResolver#resolveVariable(String)
    060         */
    061        public Object resolveVariable(final String pName) throws ELException {
    062            return get(pName);
    063        }
    064
    065    }
    066