org.apache.commons.jexl.JexlHelper Maven / Gradle / Ivy
/*
* 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.commons.jexl;
import org.apache.commons.jexl.context.HashMapContext;
/**
* Helper to create a context. In the current implementation of JEXL, there
* is one implementation of JexlContext - {@link HashMapContext}, and there
* is no reason not to directly instantiate {@link HashMapContext} in your
* own application.
*
* @since 1.0
* @author Geir Magnusson Jr.
* @version $Id: JexlHelper.java 480412 2006-11-29 05:11:23Z bayard $
*/
public class JexlHelper {
/** singleton instance. */
protected static JexlHelper helper = new JexlHelper();
/** @return the single instance. */
protected static JexlHelper getInstance() {
return helper;
}
/**
* Returns a new {@link JexlContext}.
* @return a new JexlContext
*/
public static JexlContext createContext() {
return getInstance().newContext();
}
/**
* Creates and returns a new {@link JexlContext}.
* The current implementation creates a new instance of
* {@link HashMapContext}.
* @return a new JexlContext
*/
protected JexlContext newContext() {
return new HashMapContext();
}
}