001// Copyright 2005 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.tapestry.binding;
016
017import org.apache.hivemind.Location;
018import org.apache.hivemind.util.Defense;
019import org.apache.tapestry.coerce.ValueConverter;
020import org.apache.tapestry.services.InjectedValueProvider;
021
022/**
023 * A binding that accesses a HiveMind object. This is similar to injecting a HiveMind object as a
024 * property and referencing that property.
025 * 
026 * @author Howard M. Lewis Ship
027 * @since 4.0
028 */
029public class HiveMindBinding extends AbstractBinding
030{
031    private String _objectReference;
032
033    private InjectedValueProvider _provider;
034
035    public HiveMindBinding(String description, ValueConverter valueConverter, Location location,
036            String objectReference, InjectedValueProvider provider)
037    {
038        super(description, valueConverter, location);
039
040        Defense.notNull(objectReference, "objectReference");
041        Defense.notNull(provider, "provider");
042
043        _objectReference = objectReference;
044        _provider = provider;
045    }
046
047    public Object getObject()
048    {
049        return _provider.obtainValue(_objectReference, getLocation());
050    }
051
052}