Java tutorial
/******************************************************************************* * Copyright (c) 2011 itemis AG (http://www.itemis.eu) and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html *******************************************************************************/ package org.eclipse.xtext.builder; import static com.google.common.collect.Maps.*; import static com.google.common.collect.Sets.*; import java.util.Map; import java.util.Set; import org.apache.log4j.Logger; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IFolder; import org.eclipse.core.resources.IMarker; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IStorage; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.OperationCanceledException; import org.eclipse.emf.common.util.URI; import org.eclipse.emf.common.util.WrappedException; import org.eclipse.emf.ecore.resource.Resource; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.xtext.generator.GeneratorContext; import org.eclipse.xtext.generator.GeneratorDelegate; import org.eclipse.xtext.generator.IFileSystemAccess; import org.eclipse.xtext.generator.IFileSystemAccess2; import org.eclipse.xtext.resource.IResourceDescription; import org.eclipse.xtext.resource.IResourceDescription.Delta; import org.eclipse.xtext.resource.IResourceServiceProvider; import org.eclipse.xtext.ui.resource.IStorage2UriMapper; import org.eclipse.xtext.util.CancelIndicator; import org.eclipse.xtext.util.IAcceptor; import org.eclipse.xtext.util.Pair; import com.google.inject.Inject; import com.google.inject.Provider; /** * @author Sven Efftinge - Initial contribution and API * @author Jan Koehnlein * @deprecated use {@link BuilderParticipant} instead */ @Deprecated public class JavaProjectBasedBuilderParticipant implements IXtextBuilderParticipant { private final static Logger logger = Logger.getLogger(JavaProjectBasedBuilderParticipant.class); @Inject private GeneratorDelegate generator; @Inject private Provider<EclipseResourceFileSystemAccess> fileAccessProvider; @Inject private IResourceServiceProvider resourceServiceProvider; @Inject private IStorage2UriMapper storage2UriMapper; private Map<URI, Set<String>> sourceTargetMap = newHashMap(); @Override public void build(IBuildContext context, IProgressMonitor monitor) throws CoreException { final IProject builtProject = context.getBuiltProject(); IJavaProject javaProject = JavaCore.create(builtProject); if (!javaProject.exists()) return; final IFolder srcGenFolder = getSrcGenFolder(builtProject); if (!srcGenFolder.exists()) return; if (!isValidOutputFolder(javaProject, srcGenFolder)) return; for (IResourceDescription.Delta delta : context.getDeltas()) { if (monitor.isCanceled()) { throw new OperationCanceledException(); } final Set<String> oldFiles = newHashSet(); if (sourceTargetMap.containsKey(delta.getUri())) { oldFiles.addAll(sourceTargetMap.get(delta.getUri())); } final Set<String> newFiles = newHashSet(); IFileSystemAccess fileSystemAccess = getConfiguredFileSystemAccess(srcGenFolder, new IAcceptor<String>() { @Override public void accept(String fileName) { oldFiles.remove(fileName); newFiles.add(fileName); } }); if (delta.getNew() == null) { handleDeletion(delta, context, fileSystemAccess); } else { try { handleChangedContents(delta, context, fileSystemAccess); } catch (Exception e) { logger.error("Error during compilation of '" + delta.getUri() + "'.", e); } } for (String removeFile : oldFiles) { fileSystemAccess.deleteFile(removeFile); } if (!newFiles.isEmpty()) { sourceTargetMap.put(delta.getUri(), newFiles); } } } /** * @since 2.0 */ protected boolean isValidOutputFolder(IJavaProject javaProject, final IFolder srcGenFolder) { return srcGenFolder != null && srcGenFolder.exists(); } /** * @since 2.0 */ protected IFolder getSrcGenFolder(final IProject builtProject) { return builtProject.getFolder("src-gen"); } protected IFileSystemAccess getConfiguredFileSystemAccess(IFolder srcGenFolder, IAcceptor<String> newFileAcceptor) { EclipseResourceFileSystemAccess access = fileAccessProvider.get(); access.setOutputPath(srcGenFolder.getFullPath().toString()); access.setNewFileAcceptor(newFileAcceptor); return access; } protected void handleChangedContents(Delta delta, IBuildContext context, IFileSystemAccess fileSystemAccess) { if (!resourceServiceProvider.canHandle(delta.getUri())) return; Resource resource = context.getResourceSet().getResource(delta.getUri(), true); if (shouldGenerate(resource, context)) { CancelIndicator cancelIndicator = CancelIndicator.NullImpl; if (fileSystemAccess instanceof EclipseResourceFileSystemAccess2) { cancelIndicator = new MonitorBasedCancelIndicator( ((EclipseResourceFileSystemAccess2) fileSystemAccess).getMonitor()); } GeneratorContext generatorContext = new GeneratorContext(); generatorContext.setCancelIndicator(cancelIndicator); generator.generate(resource, (IFileSystemAccess2) fileSystemAccess, generatorContext); context.needRebuild(); } } protected boolean shouldGenerate(Resource resource, IBuildContext context) { try { Iterable<Pair<IStorage, IProject>> storages = storage2UriMapper.getStorages(resource.getURI()); for (Pair<IStorage, IProject> pair : storages) { if (pair.getFirst() instanceof IFile && pair.getSecond().equals(context.getBuiltProject())) { return ((IFile) pair.getFirst()).findMaxProblemSeverity(null, true, IResource.DEPTH_INFINITE) != IMarker.SEVERITY_ERROR; } } return false; } catch (CoreException exc) { throw new WrappedException(exc); } } protected void handleDeletion(Delta delta, IBuildContext context, IFileSystemAccess fileSystemAccess) { } }