| // Copyright 2007, 2008 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.internal.services; |
| |
| import org.apache.tapestry5.Asset; |
| import org.apache.tapestry5.annotations.Path; |
| import org.apache.tapestry5.ioc.AnnotationProvider; |
| import org.apache.tapestry5.ioc.ObjectLocator; |
| import org.apache.tapestry5.ioc.ObjectProvider; |
| import org.apache.tapestry5.ioc.services.Builtin; |
| import org.apache.tapestry5.ioc.services.SymbolSource; |
| import org.apache.tapestry5.ioc.services.TypeCoercer; |
| import org.apache.tapestry5.services.AssetSource; |
| import org.apache.tapestry5.services.Core; |
| |
| /** |
| * Exposes assets (in the current locale). The Inject annotation must be supplemented by a {@link Path} annotation, to |
| * identify what asset to be injected. |
| */ |
| public class AssetObjectProvider implements ObjectProvider |
| { |
| private final AssetSource source; |
| |
| private final TypeCoercer typeCoercer; |
| |
| private final SymbolSource symbolSource; |
| |
| public AssetObjectProvider(@Core AssetSource source, |
| |
| @Builtin TypeCoercer typeCoercer, |
| |
| @Builtin SymbolSource symbolSource) |
| { |
| this.source = source; |
| this.typeCoercer = typeCoercer; |
| this.symbolSource = symbolSource; |
| } |
| |
| /** |
| * Provides the asset. If the expression does not identify an asset domain, with a prefix, it is assumed to be a |
| * path on the classpath, relative to the root of the classpath. |
| * |
| * @param objectType the type of object (which must be Object or Asset) |
| * @param locator not used |
| */ |
| public <T> T provide(Class<T> objectType, AnnotationProvider annotationProvider, ObjectLocator locator) |
| { |
| Path path = annotationProvider.getAnnotation(Path.class); |
| |
| if (path == null) return null; |
| |
| String expanded = symbolSource.expandSymbols(path.value()); |
| |
| Asset asset = source.getAsset(null, expanded, null); |
| |
| return typeCoercer.coerce(asset, objectType); |
| } |
| } |