001    // Copyright 2007, 2008, 2009, 2010 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.services;
016    
017    import org.apache.tapestry5.ValueEncoder;
018    import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
019    
020    /**
021     * A source for value encoders based on a property type.
022     */
023    @UsesMappedConfiguration(key=Class.class, value=ValueEncoderFactory.class)
024    public interface ValueEncoderSource
025    {
026        /**
027         * Gets or creates a value encoder for the indicated type.  ValueEncoders are cached.
028         *
029         * @param type type of value to be encoded and decoded
030         * @return the value encoder
031         */
032        <T> ValueEncoder<T> getValueEncoder(Class<T> type);
033    }