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 */
017package org.apache.commons.jexl2;
018
019/**
020 * Wraps an Object as a Jexl context.
021 * @param <T> the wrapped object type to use
022 * @since 2.1
023 */
024public class ObjectContext<T> implements JexlContext {
025    /** The property solving jexl engine. */
026    private final JexlEngine jexl;
027    /** The object serving as context provider. */
028    private final T object;
029
030    /**
031     * Creates a new ObjectContext.
032     * @param engine the jexl engine to use to solve properties
033     * @param wrapped the object to wrap in this context
034     */
035    public ObjectContext(JexlEngine engine, T wrapped) {
036        this.jexl = engine;
037        this.object = wrapped;
038    }
039
040    /** {@inheritDoc} */
041    public Object get(String name) {
042        return jexl.getProperty(object, name);
043    }
044
045    /** {@inheritDoc} */
046    public void set(String name, Object value) {
047        jexl.setProperty(object, name, value);
048    }
049
050    /** {@inheritDoc} */
051    public boolean has(String name) {
052        return jexl.getUberspect().getPropertyGet(object, name, null) != null;
053    }
054}