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
015package org.apache.tapestry5.beanmodel;
016
017import org.apache.tapestry5.commons.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 */
023public 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}