001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.wicket.injection;
018
019import java.lang.reflect.Field;
020
021/**
022 * Factory object used by injector to generate values for fields of the object being injected.
023 * 
024 * @author Igor Vaynberg (ivaynberg)
025 * 
026 */
027public interface IFieldValueFactory
028{
029        /**
030         * Returns the value the field will be set to
031         * 
032         * @param field
033         *            field being injected
034         * @param fieldOwner
035         *            instance of object being injected
036         * 
037         * @return new field value
038         */
039        Object getFieldValue(Field field, Object fieldOwner);
040
041        /**
042         * Returns true if the factory can generate a value for the field, false otherwise.
043         * 
044         * If this method returns false, getFieldValue() will not be called on this factory
045         * 
046         * @param field
047         *            field
048         * @return true if the factory can generate a value for the field, false otherwise
049         */
050        boolean supportsField(Field field);
051}