001    // Copyright 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.ioc.services.TypeCoercer;
019    import org.apache.tapestry5.services.ValueEncoderFactory;
020    
021    /**
022     * Provides {@link org.apache.tapestry5.ValueEncoder} instances that are backed by the {@link
023     * org.apache.tapestry5.ioc.services.TypeCoercer} service.
024     */
025    public class TypeCoercedValueEncoderFactory implements ValueEncoderFactory<Object>
026    {
027        private final TypeCoercer typeCoercer;
028    
029        public TypeCoercedValueEncoderFactory(TypeCoercer typeCoercer)
030        {
031            this.typeCoercer = typeCoercer;
032        }
033    
034        public ValueEncoder<Object> create(final Class<Object> type)
035        {
036            return new ValueEncoder<Object>()
037            {
038                public String toClient(Object value)
039                {
040                    return typeCoercer.coerce(value, String.class);
041                }
042    
043                public Object toValue(String clientValue)
044                {
045                    return typeCoercer.coerce(clientValue, type);
046                }
047            };
048        }
049    }