| // 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.webresources; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.tapestry5.ContentType; |
| import org.apache.tapestry5.annotations.Path; |
| import org.apache.tapestry5.internal.InternalConstants; |
| import org.apache.tapestry5.ioc.OperationTracker; |
| import org.apache.tapestry5.ioc.Resource; |
| import org.apache.tapestry5.ioc.internal.util.CollectionFactory; |
| import org.apache.tapestry5.ioc.internal.util.InternalUtils; |
| import org.apache.tapestry5.services.assets.ResourceDependencies; |
| import org.apache.tapestry5.services.assets.ResourceTransformer; |
| import org.mozilla.javascript.Context; |
| import org.mozilla.javascript.NativeObject; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.charset.Charset; |
| import java.util.List; |
| |
| public class CoffeeScriptCompiler implements ResourceTransformer |
| { |
| private final static Charset UTF8 = Charset.forName("utf-8"); |
| |
| private final RhinoExecutorPool executorPool; |
| |
| @Override |
| public ContentType getTransformedContentType() |
| { |
| return InternalConstants.JAVASCRIPT_CONTENT_TYPE; |
| } |
| |
| public CoffeeScriptCompiler(@Path("classpath:org/apache/tapestry5/webresources/internal/coffee-script.js") |
| Resource mainCompiler, |
| @Path("classpath:org/apache/tapestry5/webresources/internal/invoke-coffeescript.js") |
| Resource shim, |
| OperationTracker tracker) |
| { |
| |
| executorPool = new RhinoExecutorPool(tracker, toList(mainCompiler, shim)); |
| } |
| |
| private List<Resource> toList(Resource... resources) |
| { |
| List<Resource> list = CollectionFactory.newList(); |
| |
| for (Resource r : resources) |
| { |
| list.add(r); |
| } |
| |
| return list; |
| } |
| |
| |
| private static String getString(NativeObject object, String key) |
| { |
| return object.get(key).toString(); |
| } |
| |
| |
| @Override |
| public InputStream transform(Resource source, ResourceDependencies dependencies) throws IOException |
| { |
| InputStream is = null; |
| String content; |
| |
| try |
| { |
| is = source.openStream(); |
| content = IOUtils.toString(is, UTF8); |
| } finally |
| { |
| InternalUtils.close(is); |
| } |
| |
| RhinoExecutor executor = executorPool.get(); |
| |
| try |
| { |
| |
| NativeObject result = (NativeObject) executor.invokeFunction("compileCoffeeScriptSource", content, source.toString()); |
| |
| if (result.containsKey("exception")) |
| { |
| throw new RuntimeException(getString(result, "exception")); |
| } |
| |
| return IOUtils.toInputStream(getString(result, "output"), UTF8); |
| |
| } finally |
| { |
| executor.discard(); |
| } |
| |
| |
| } |
| } |