Java tutorial
/******************************************************************************* * Copyright (c) 2007-2012 Red Hat, Inc. * Distributed under license by Red Hat, Inc. All rights reserved. * This program is 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 * * Contributors: * Red Hat, Inc. - initial API and implementation ******************************************************************************/ package org.jboss.tools.common.text.ext.hyperlink; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IPath; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.search.IJavaSearchConstants; import org.eclipse.jdt.core.search.IJavaSearchScope; 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.jdt.ui.JavaUI; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.IRegion; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.IStorageEditorInput; import org.eclipse.ui.IWorkbenchPage; import org.jboss.tools.common.text.ext.ExtensionsPlugin; import org.jboss.tools.common.text.ext.util.StructuredModelWrapper; import org.jboss.tools.common.text.ext.util.Utils; import org.w3c.dom.Attr; import org.w3c.dom.Document; import org.w3c.dom.Node; /** * @author Jeremy */ public abstract class ClassMethodHyperlink extends AbstractHyperlink { protected abstract String getMethodName(IRegion region); protected abstract String getClassName(IRegion region); /** * @see com.ibm.sse.editor.AbstractHyperlink#doHyperlink(org.eclipse.jface.text.IRegion) */ protected void doHyperlink(IRegion region) { try { String className = getClassName(region); String methodName = getMethodName(region); IJavaElement classMethod = null; if (className != null && className.trim().length() > 0) { classMethod = searchForClassMethod(className, methodName); } if (classMethod != null) { IEditorPart part = JavaUI.openInEditor(classMethod); if (part != null) { JavaUI.revealInEditor(part, classMethod); } else { // could not open editor openFileFailed(); } } else { openFileFailed(); } } catch (CoreException x) { openFileFailed(); } } protected IJavaElement searchForClassMethod(IJavaProject javaProject, String className, String methodName) { // Get the search pattern SearchPattern pattern = SearchPattern.createPattern(className + "." + methodName, //$NON-NLS-1$ IJavaSearchConstants.METHOD, IJavaSearchConstants.DECLARATIONS, SearchPattern.R_EXACT_MATCH | SearchPattern.R_CASE_SENSITIVE); // Get the search scope IJavaSearchScope scope = SearchEngine.createJavaSearchScope(new IJavaElement[] { javaProject }); final List<SearchMatch> matches = new ArrayList<SearchMatch>(); // Get the search requestor SearchRequestor requestor = new SearchRequestor() { public void acceptSearchMatch(SearchMatch match) throws CoreException { matches.add(match); } }; // Search SearchEngine searchEngine = new SearchEngine(); try { searchEngine.search(pattern, new SearchParticipant[] { SearchEngine.getDefaultSearchParticipant() }, scope, requestor, null); } catch (CoreException ex) { // ignore } for (Iterator i = matches.iterator(); i != null && i.hasNext();) { return (IJavaElement) ((SearchMatch) i.next()).getElement(); } return null; } protected IJavaElement searchForClassMethod(String className, String methodName) { IFile documentFile = getFile(); IJavaElement result = null; try { IProject project = null; if (documentFile == null) { IWorkbenchPage workbenchPage = ExtensionsPlugin.getDefault().getWorkbench() .getActiveWorkbenchWindow().getActivePage(); IEditorPart activeEditorPart = workbenchPage.getActiveEditor(); IEditorInput editorInput = activeEditorPart.getEditorInput(); if (editorInput instanceof IStorageEditorInput) { IStorageEditorInput moeInput = (IStorageEditorInput) editorInput; IPath p = moeInput.getStorage().getFullPath(); String s0 = p.segment(0); project = ResourcesPlugin.getWorkspace().getRoot().getProject(s0); } } else { project = documentFile.getProject(); } if (project != null && project.isOpen() && project.hasNature(JavaCore.NATURE_ID)) { IJavaProject javaProject = JavaCore.create(project); result = searchForClassMethod(javaProject, className, methodName); } } catch (CoreException x) { ExtensionsPlugin.getPluginLog() .logError("Error while looking for method " + methodName + " of class " + className, x); //$NON-NLS-1$ //$NON-NLS-2$ } return result; } protected String getAttributeValue(Node node, String attrName) { try { Attr attr = (Attr) node.getAttributes().getNamedItem(attrName); return Utils.getTrimmedValue(getDocument(), attr); } catch (BadLocationException x) { //ignore return null; } } protected String getAttributeValue(IRegion region, String attrName) { StructuredModelWrapper smw = new StructuredModelWrapper(); try { smw.init(getDocument()); Document xmlDocument = smw.getDocument(); if (xmlDocument == null) return null; Node n = Utils.findNodeForOffset(xmlDocument, region.getOffset()); if (n == null || !(n instanceof Attr)) return null; Node node = ((Attr) n).getOwnerElement(); Attr attr = (Attr) node.getAttributes().getNamedItem(attrName); return Utils.getTrimmedValue(getDocument(), attr); } catch (BadLocationException x) { //ignore return null; } finally { smw.dispose(); } } }