001// Licensed under the Apache License, Version 2.0 (the "License");
002// you may not use this file except in compliance with the License.
003// You may obtain a copy of the License at
004//
005//     http://www.apache.org/licenses/LICENSE-2.0
006//
007// Unless required by applicable law or agreed to in writing, software
008// distributed under the License is distributed on an "AS IS" BASIS,
009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
010// See the License for the specific language governing permissions and
011// limitations under the License.
012
013package org.apache.tapestry5.internal.bindings;
014
015import org.apache.tapestry5.Asset;
016import org.apache.tapestry5.Binding;
017import org.apache.tapestry5.ComponentResources;
018import org.apache.tapestry5.ioc.Location;
019import org.apache.tapestry5.services.AssetSource;
020import org.apache.tapestry5.services.BindingFactory;
021
022/**
023 * Binding factory where the expression is a reference to an asset.
024 *
025 * @see org.apache.tapestry5.services.AssetSource
026 * @see org.apache.tapestry5.internal.bindings.ContextBindingFactory
027 */
028public class AssetBindingFactory implements BindingFactory
029{
030    private final AssetSource source;
031
032    public AssetBindingFactory(AssetSource source)
033    {
034        this.source = source;
035    }
036
037    public Binding newBinding(String description, ComponentResources container, ComponentResources component,
038                              String expression, Location location)
039    {
040        // There's some possibility this isn't quite right when it appears in a base class and a
041        // sub-class gets instantiated, because relative path for the asset should be relative to the
042        // base class, but will instead by relative to the subclass.
043
044        Asset asset = source.getComponentAsset(container, expression, container.getComponentModel().getLibraryName());
045
046        return new AssetBinding(location, description, asset);
047    }
048}