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.beanutils.converters; 018 019import org.apache.commons.beanutils.Converter; 020 021/** 022 * <p>Provides a facade for {@link Converter} implementations 023 * preventing access to any public API in the implementation, 024 * other than that specified by {@link Converter}. 025 * <p> 026 * This implementation can be used to prevent registered {@link Converter} 027 * implementations that provide configuration options from being 028 * retrieved and modified.</p> 029 * 030 * @version $Id$ 031 * @since 1.8.0 032 */ 033public final class ConverterFacade implements Converter { 034 035 private final Converter converter; 036 037 /** 038 * Construct a converter which delegates to the specified 039 * {@link Converter} implementation. 040 * 041 * @param converter The converter to delegate to 042 */ 043 public ConverterFacade(final Converter converter) { 044 if (converter == null) { 045 throw new IllegalArgumentException("Converter is missing"); 046 } 047 this.converter = converter; 048 } 049 050 /** 051 * Convert the input object into an output object of the 052 * specified type by delegating to the underlying {@link Converter} 053 * implementation. 054 * 055 * @param <T> The result type of the conversion 056 * @param type Data type to which this value should be converted 057 * @param value The input value to be converted 058 * @return The converted value. 059 */ 060 public <T> T convert(final Class<T> type, final Object value) { 061 return converter.convert(type, value); 062 } 063 064 /** 065 * Provide a String representation of this facade implementation 066 * sand the underlying {@link Converter} it delegates to. 067 * 068 * @return A String representation of this facade implementation 069 * sand the underlying {@link Converter} it delegates to 070 */ 071 @Override 072 public String toString() { 073 return "ConverterFacade[" + converter.toString() + "]"; 074 } 075 076}