Java tutorial
/******************************************************************************* * Copyright (c) 2012 Pivotal Software, Inc. * 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 * https://www.eclipse.org/legal/epl-v10.html * * Contributors: * Pivotal Software, Inc. - initial API and implementation *******************************************************************************/ package com.vmware.vfabric.ide.eclipse.tcserver.insight.internal.ui.link; import java.net.URL; import java.util.ArrayList; import java.util.HashSet; import java.util.List; import java.util.Set; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.eclipse.core.resources.IProject; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.core.runtime.Status; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IType; import org.eclipse.jdt.core.search.IJavaSearchConstants; import org.eclipse.jdt.core.search.SearchEngine; import org.eclipse.jdt.core.search.SearchMatch; import org.eclipse.jdt.core.search.SearchParticipant; import org.eclipse.jdt.core.search.SearchPattern; import org.eclipse.jdt.core.search.SearchRequestor; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.IRegion; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.progress.UIJob; import org.eclipse.ui.texteditor.IDocumentProvider; import org.eclipse.ui.texteditor.ITextEditor; import org.eclipse.wst.server.core.IModule; import org.eclipse.wst.server.core.IServer; import org.eclipse.wst.server.core.ServerUtil; import org.eclipse.wst.server.core.model.IURLProvider; import org.springsource.ide.eclipse.commons.core.JdtUtils; import org.springsource.ide.eclipse.commons.ui.SpringUIUtils; import com.vmware.vfabric.ide.eclipse.tcserver.insight.internal.ui.Activator; import com.vmware.vfabric.ide.eclipse.tcserver.insight.internal.ui.ILocationHandler; /** * {@link ILocationHandler} that opens {@link IJavaElement}s based on the given * string in the link parameter. * @author Christian Dupuis * @author Steffen Pingel * @since 2.2.0 */ public class JavaElementLocationHandler implements ILocationHandler { private static final Pattern PATTERN = Pattern.compile("(.*),(.*)/(.*)/(.*)"); /** * {@inheritDoc} */ public void handleLocation(String serverUrl, String parameter) { Matcher matcher = PATTERN.matcher(parameter); if (matcher.matches()) { final String contextRoot = serverUrl + matcher.group(1) + "/"; final String className = matcher.group(2); // final String methodName = matcher.group(3); final String lineNumber = matcher.group(4); UIJob job = new UIJob("Go to Source") { //$NON-NLS-1$ @Override public IStatus runInUIThread(IProgressMonitor monitor) { try { IProject[] projects = findProjects(contextRoot); String cleanClassName = cleanClassName(className); IType type = null; for (IProject project : projects) { type = JdtUtils.getJavaType(project, cleanClassName); if (type != null) { break; } } if (type == null) { type = findTypeInWorkspace(cleanClassName); } if (type == null) { MessageDialog.openInformation(Display.getDefault().getActiveShell(), "Type not found", "Could not find type '" + className + "' in workspace"); } else { IEditorPart editorPart = SpringUIUtils.openInEditor(type); int ln = Integer.valueOf(lineNumber); if (editorPart instanceof ITextEditor && ln >= 0) { ITextEditor textEditor = (ITextEditor) editorPart; IDocumentProvider provider = textEditor.getDocumentProvider(); provider.connect(editorPart.getEditorInput()); IDocument document = provider.getDocument(editorPart.getEditorInput()); try { IRegion line = document.getLineInformation(ln - 1); textEditor.selectAndReveal(line.getOffset(), line.getLength()); } catch (BadLocationException e) { } provider.disconnect(editorPart.getEditorInput()); } } } catch (CoreException e) { return new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Error finding class", e); } return Status.OK_STATUS; } }; job.setSystem(true); job.schedule(); } } private static String cleanClassName(final String className) { String cleanClassName = className; int ix = className.indexOf('$'); if (ix > 0) { cleanClassName = className.substring(0, ix); } return cleanClassName; } private static IProject[] findProjects(final String contextRoot) { Set<IProject> projects = new HashSet<IProject>(); IModule[] modules = ServerUtil.getModules("jst.web"); for (IModule module : modules) { IServer[] servers = ServerUtil.getServersByModule(module, new NullProgressMonitor()); for (IServer server : servers) { if (server.getServerState() == IServer.STATE_STARTED) { IURLProvider urlProvider = (IURLProvider) server.loadAdapter(IURLProvider.class, new NullProgressMonitor()); if (urlProvider != null) { URL url = urlProvider.getModuleRootURL(module); if (url.toString().equals(contextRoot)) { projects.add(module.getProject()); } } } } } return projects.toArray(new IProject[projects.size()]); } public static IType findTypeInWorkspace(String typeName) throws CoreException { IType[] types = findTypes(typeName, null); if (types.length > 0) { return types[0]; } return null; } private static IType[] findTypes(String typeName, IProgressMonitor monitor) throws CoreException { final List<IType> results = new ArrayList<IType>(); SearchRequestor collector = new SearchRequestor() { @Override public void acceptSearchMatch(SearchMatch match) throws CoreException { Object element = match.getElement(); if (element instanceof IType) { results.add((IType) element); } } }; SearchEngine engine = new SearchEngine(); SearchPattern pattern = SearchPattern.createPattern(typeName, IJavaSearchConstants.TYPE, IJavaSearchConstants.DECLARATIONS, SearchPattern.R_EXACT_MATCH); engine.search(pattern, new SearchParticipant[] { SearchEngine.getDefaultSearchParticipant() }, SearchEngine.createWorkspaceScope(), collector, monitor); return results.toArray(new IType[results.size()]); } }