001// Copyright 2007, 2008, 2009 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.internal.bindings;
016
017import org.apache.tapestry5.Asset;
018import org.apache.tapestry5.Binding;
019import org.apache.tapestry5.ComponentResources;
020import org.apache.tapestry5.ioc.Location;
021import org.apache.tapestry5.services.AssetSource;
022import org.apache.tapestry5.services.BindingFactory;
023
024/**
025 * Binding factory where the expression is a reference to an asset.
026 *
027 * @see org.apache.tapestry5.services.AssetSource
028 * @see org.apache.tapestry5.internal.bindings.ContextBindingFactory
029 */
030public class AssetBindingFactory implements BindingFactory
031{
032    private final AssetSource source;
033
034    public AssetBindingFactory(AssetSource source)
035    {
036        this.source = source;
037    }
038
039    public Binding newBinding(String description, ComponentResources container, ComponentResources component,
040                              String expression, Location location)
041    {
042        // There's some possibility this isn't quite right when it appears in a base class and a
043        // sub-class gets instantiated, because relative path for the asset should be relative to the
044        // base class, but will instead by relative to the subclass.
045
046        Asset asset = source.getComponentAsset(container, expression);
047
048        return new AssetBinding(location, description, asset);
049    }
050}