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.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 */
024 public 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 }