001/*
002 *  Copyright 2010, 2011 Chris Pheby
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.jadira.bindings.core.general.binding;
017
018import org.jadira.bindings.core.api.Binding;
019import org.jadira.bindings.core.api.FromUnmarshaller;
020
021/**
022 * Binding that supports a from contract but not to
023 * @param <S> Source type for the conversion
024 * @param <T> Target type
025 */
026public class FromBinding<S, T> implements Binding<S, T> {
027
028    private final FromUnmarshaller<S, T> unmarshal;
029    
030        /**
031         * Create a new instance of a {@link Binding} wrapping the given {@link FromUnmarshaller} instance
032         * @param unmarshal The FromUnmarshaller to wrap
033         */
034    public FromBinding(FromUnmarshaller<S, T> unmarshal) {
035        
036        if (unmarshal == null) {
037            throw new IllegalStateException("Unmarshaller may not be null");
038        }
039        
040        this.unmarshal = unmarshal;
041    }
042
043        /**
044         * {@inheritDoc}
045         */
046        /* @Override */
047    public T marshal(S object) throws UnsupportedOperationException {
048        throw new UnsupportedOperationException("FromBinding does not support marshalling");
049    }
050
051        /**
052         * {@inheritDoc}
053         */
054        /* @Override */
055    public S unmarshal(T inputString) {
056        return unmarshal.unmarshal(inputString);
057    }
058
059        /**
060         * {@inheritDoc}
061         */
062        /* @Override */
063        public Class<S> getBoundClass() {
064                return unmarshal.getBoundClass();
065        }
066
067        /**
068         * {@inheritDoc}
069         */
070        /* @Override */
071        public Class<T> getTargetClass() {
072                return unmarshal.getTargetClass();
073        }
074}