001    // Copyright 2007 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;
016    
017    import org.apache.tapestry5.ioc.AnnotationProvider;
018    
019    /**
020     * Used to read or update the value associated with a property. A PropertyConduit provides access to the annotations on
021     * the underlying getter and/or setter methods.
022     */
023    public interface PropertyConduit extends AnnotationProvider
024    {
025        /**
026         * Reads the property from the instance.
027         *
028         * @param instance object containing the property
029         * @return the current value of the property
030         */
031        Object get(Object instance);
032    
033        /**
034         * Changes the current value of the property.
035         *
036         * @param instance object containing the property
037         * @param value    to change the property to
038         */
039        void set(Object instance, Object value);
040    
041        /**
042         * Returns the type of the property read or updated by the conduit.
043         */
044        Class getPropertyType();
045    }