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.enhance;
016
017import org.apache.hivemind.Location;
018import org.apache.tapestry.IBinding;
019import org.apache.tapestry.IComponent;
020import org.apache.tapestry.binding.BindingConstants;
021import org.apache.tapestry.binding.BindingSource;
022
023/**
024 * Encapsulates information needed to construct an initial value binding for a specified property
025 * (with an initial value).
026 * 
027 * @author Howard M. Lewis Ship
028 * @since 4.0
029 */
030public class InitialValueBindingCreator
031{
032    private BindingSource _bindingSource;
033
034    private String _description;
035
036    private String _initialValue;
037
038    private Location _location;
039
040    /**
041     * This method is just implemented for testing purposes.
042     */
043
044    public boolean equals(Object obj)
045    {
046        InitialValueBindingCreator c = (InitialValueBindingCreator) obj;
047
048        return _bindingSource == c._bindingSource && _description.equals(c._description)
049                && _initialValue.equals(c._initialValue) && _location.equals(c._location);
050    }
051
052    public InitialValueBindingCreator(BindingSource bindingSource, String description,
053            String initialValue, Location location)
054    {
055        _bindingSource = bindingSource;
056        _description = description;
057        _initialValue = initialValue;
058        _location = location;
059    }
060
061    public IBinding createBinding(IComponent component)
062    {
063        return _bindingSource.createBinding(component, _description, _initialValue, BindingConstants.OGNL_PREFIX, _location);
064    }
065}