org.eclipse.xtext.generator.trace.ITraceToBytecodeInstaller Java Examples

The following examples show how to use org.eclipse.xtext.generator.trace.ITraceToBytecodeInstaller. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: AbstractXtendInstallDebugInfoMojo.java From xtext-xtend with Eclipse Public License 2.0

6 votes

protected void installTrace(File traceFile, Collection<File> classFiles) throws FileNotFoundException, IOException {
	ITraceToBytecodeInstaller traceToBytecodeInstaller = createTraceToBytecodeInstaller();
	InputStream in = new FileInputStream(traceFile);
	try {
		AbstractTraceRegion traceRegion = traceRegionSerializer.readTraceRegionFrom(in);
		traceToBytecodeInstaller.setTrace(traceFileNameProvider.getJavaFromTrace(traceFile.getName()), traceRegion);
		if (getLog().isDebugEnabled())
			getLog().debug("Installing trace " + traceFile + " into:");
		for (File classFile : classFiles) {
			if (getLog().isDebugEnabled())
				getLog().debug("  " + classFile);
			byte[] bytecodeWithTraces = traceToBytecodeInstaller.installTrace(Files.toByteArray(classFile));
			if (bytecodeWithTraces != null)
				Files.write(bytecodeWithTraces, classFile);
		}
	} finally {
		in.close();
	}
}

Example #2

Source File: DebugSourceInstallingCompilationParticipant.java From xtext-eclipse with Eclipse Public License 2.0

4 votes

@Override
public void buildFinished(IJavaProject project) {
	StoppedTask task = Stopwatches.forTask("DebugSourceInstallingCompilationParticipant.install");
	try {
		task.start();
		super.buildFinished(project);
		if (files == null)
			return;
		for (BuildContext ctx : files) {
			try {
				IFile generatedJavaFile = ctx.getFile();

				// This may fail if there is no trace file.
				IEclipseTrace traceToSource = traceInformation.getTraceToSource(generatedJavaFile);
				if (traceToSource == null) {
					continue;
				}
				AbstractTraceRegion rootTraceRegion = findRootTraceRegion(traceToSource);
				if (rootTraceRegion == null)
					continue;

				SourceRelativeURI dslSourceFile = rootTraceRegion.getAssociatedSrcRelativePath();

				// OutputConfigurations are only available for folders targeted by Xtext's code generation.
				OutputConfiguration outputConfiguration = findOutputConfiguration(dslSourceFile, generatedJavaFile);
				if (outputConfiguration == null)
					continue;

				IJavaElement element = JavaCore.create(generatedJavaFile);
				if (element == null)
					continue;

				deleteTaskMarkers(generatedJavaFile);
				markerReflector.reflectErrorMarkerInSource(generatedJavaFile, traceToSource);

				ITraceToBytecodeInstaller installer = getInstaller(outputConfiguration);
				installer.setTrace(generatedJavaFile.getName(), rootTraceRegion);
				for (IFile javaClassFile : findGeneratedJavaClassFiles(element)) {
					InputStream contents = javaClassFile.getContents();
					try {
						byte[] byteCode = installer.installTrace(ByteStreams.toByteArray(contents));
						if (byteCode != null) {
							javaClassFile.setContents(new ByteArrayInputStream(byteCode), 0, null);
						} else {
							// we need to touch the class file to do a respin of the build
							// otherwise a needsRebuild request is ignored since no IResourceDelta is available
							javaClassFile.touch(null);
						}
					} finally {
						contents.close();
					}
				}
			} catch (Exception e) {
				String msg = "Could not process %s to install source information: %s";
				log.error(String.format(msg, ctx.getFile().getFullPath().toString(), e.getMessage()), e);
			}
		}
	} finally {
		files = null;
		task.stop();
	}
}