001package org.apache.commons.beanutils2.transformers;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.lang.reflect.ParameterizedType;
023import java.lang.reflect.Type;
024
025import org.apache.commons.beanutils2.Transformer;
026
027public abstract class AbstractTransformer<S, T>
028    implements Transformer<S, T>
029{
030
031    private final Type sourceType;
032
033    private final Type targetType;
034
035    public AbstractTransformer()
036    {
037        Type superclass = getClass().getGenericSuperclass();
038        if ( superclass instanceof Class )
039        {
040            throw new RuntimeException( "Missing type parameter." );
041        }
042        ParameterizedType parameterizedType = (ParameterizedType) superclass;
043        sourceType = parameterizedType.getActualTypeArguments()[0];
044        targetType = parameterizedType.getActualTypeArguments()[1];
045    }
046
047    public final Type getSourceType()
048    {
049        return sourceType;
050    }
051
052    public final Type getTargetType()
053    {
054        return targetType;
055    }
056
057}