    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.commons.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}