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
018package org.apache.commons.proxy2.interceptor;
019
020import org.apache.commons.lang3.Validate;
021import org.apache.commons.proxy2.Interceptor;
022import org.apache.commons.proxy2.Invocation;
023import org.apache.commons.proxy2.ObjectProvider;
024
025/**
026 * A {@link ObjectProviderInterceptor} merely returns the value returned from
027 * {@link org.apache.commons.proxy2.ObjectProvider#getObject()}.
028 */
029public class ObjectProviderInterceptor implements Interceptor
030{
031    private static final long serialVersionUID = 1L;
032
033    //******************************************************************************************************************
034    // Fields
035    //******************************************************************************************************************
036
037    private final ObjectProvider<?> provider;
038
039    //******************************************************************************************************************
040    // Constructors
041    //******************************************************************************************************************
042
043    public ObjectProviderInterceptor(ObjectProvider<?> provider)
044    {
045        this.provider = Validate.notNull(provider, "Provider cannot be null.");
046    }
047
048    //******************************************************************************************************************
049    // Interceptor Implementation
050    //******************************************************************************************************************
051
052    @Override
053    public Object intercept(Invocation invocation) throws Throwable
054    {
055        return provider.getObject();
056    }
057}