| package org.apache.tapestry5.internal.webresources; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.charset.Charset; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Arrays; |
| |
| 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.ClasspathResource; |
| 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.NativeObject; |
| |
| public class TypeScriptCompiler implements ResourceTransformer { |
| private final static Charset UTF8 = StandardCharsets.UTF_8; |
| |
| private final RhinoExecutorPool executorPool; |
| |
| @Override |
| public ContentType getTransformedContentType() |
| { |
| return InternalConstants.JAVASCRIPT_CONTENT_TYPE; |
| } |
| |
| public TypeScriptCompiler(final OperationTracker tracker, |
| @Path("classpath:org/apache/tapestry5/webresources/internal/typescript.js") final Resource typescript) |
| { |
| this.executorPool = new RhinoExecutorPool(tracker, Arrays.<Resource> asList(typescript, |
| new ClasspathResource("org/apache/tapestry5/webresources/internal/invoke-typescript.js"))); |
| |
| } |
| |
| private static String getString(final NativeObject object, final String key) |
| { |
| return object.get(key).toString(); |
| } |
| |
| @Override |
| public InputStream transform(final Resource source, final 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("transpile", content, source.toString()); |
| |
| if (result.containsKey("exception")) { |
| throw new RuntimeException(getString(result, "exception")); |
| } |
| |
| return IOUtils.toInputStream(getString(result, "output"), UTF8); |
| |
| } finally { |
| executor.discard(); |
| } |
| |
| } |
| } |