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    
015    package org.apache.tapestry5.internal.bindings;
016    
017    import org.apache.tapestry5.Asset;
018    import org.apache.tapestry5.Binding;
019    import org.apache.tapestry5.ComponentResources;
020    import org.apache.tapestry5.ioc.Location;
021    import org.apache.tapestry5.ioc.Resource;
022    import org.apache.tapestry5.services.AssetSource;
023    import org.apache.tapestry5.services.BindingFactory;
024    
025    /**
026     * Binding factory where the expression is a reference to an asset.
027     *
028     * @see org.apache.tapestry5.services.AssetSource
029     * @see org.apache.tapestry5.internal.bindings.ContextBindingFactory
030     */
031    public class AssetBindingFactory implements BindingFactory
032    {
033        private final AssetSource source;
034    
035        public AssetBindingFactory(AssetSource source)
036        {
037            this.source = source;
038        }
039    
040        public Binding newBinding(String description, ComponentResources container, ComponentResources component,
041                                  String expression, Location location)
042        {
043            Resource baseResource = container.getBaseResource();
044    
045            Asset asset = source.getAsset(baseResource, expression, container.getLocale());
046    
047            return new AssetBinding(location, description, asset);
048        }
049    }