001    // Copyright 2007, 2008 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.internal.services;
016    
017    import org.apache.tapestry5.ValueEncoder;
018    import org.apache.tapestry5.services.ValueEncoderFactory;
019    
020    /**
021     * An implementation of {@link ValueEncoderFactory} that returns a pre-wired instance of {@link ValueEncoder}. This is
022     * odd for a factory, because it doesn't actually create the returned instance, just stores it until the encoder is
023     * needed.
024     *
025     * @param <V>
026     */
027    public class GenericValueEncoderFactory<V> implements ValueEncoderFactory<V>
028    {
029        private final ValueEncoder<V> encoder;
030    
031        public GenericValueEncoderFactory(ValueEncoder<V> encoder)
032        {
033            this.encoder = encoder;
034        }
035    
036        public ValueEncoder<V> create(Class<V> type)
037        {
038            return encoder;
039        }
040    
041        public static <V> GenericValueEncoderFactory<V> create(ValueEncoder<V> encoder)
042        {
043            return new GenericValueEncoderFactory<V>(encoder);
044        }
045    }