001    // Copyright 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.services.AssetSource;
022    import org.apache.tapestry5.services.BindingFactory;
023    
024    /**
025     * Specialization of {@link org.apache.tapestry5.internal.bindings.AssetBindingFactory} that is explicitly limited to
026     * context assets.
027     *
028     * @since 5.1.0.0
029     */
030    public class ContextBindingFactory implements BindingFactory
031    {
032        private final AssetSource source;
033    
034        public ContextBindingFactory(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            Asset asset = source.getContextAsset(expression, container.getLocale());
043    
044            return new AssetBinding(location, description, asset);
045        }
046    }