Java tutorial
/******************************************************************************* * Copyright (c) 2009-2011 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.seam.text.ext.hyperlink; import java.util.ArrayList; import java.util.List; import java.util.Set; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IResource; import org.eclipse.jdt.core.IAnnotatable; import org.eclipse.jdt.core.IAnnotation; import org.eclipse.jdt.core.ICodeAssist; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IMemberValuePair; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.internal.ui.javaeditor.EditorUtility; import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor; import org.eclipse.jdt.internal.ui.text.JavaWordFinder; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.IRegion; import org.eclipse.jface.text.ITextViewer; import org.eclipse.jface.text.hyperlink.AbstractHyperlinkDetector; import org.eclipse.jface.text.hyperlink.IHyperlink; import org.eclipse.ui.texteditor.ITextEditor; import org.jboss.tools.seam.core.IBijectedAttribute; import org.jboss.tools.seam.core.IRole; import org.jboss.tools.seam.core.ISeamComponent; import org.jboss.tools.seam.core.ISeamComponentDeclaration; import org.jboss.tools.seam.core.ISeamContextShortVariable; import org.jboss.tools.seam.core.ISeamContextVariable; import org.jboss.tools.seam.core.ISeamJavaComponentDeclaration; import org.jboss.tools.seam.core.ISeamProject; import org.jboss.tools.seam.core.ISeamXmlFactory; import org.jboss.tools.seam.core.SeamCorePlugin; import org.jboss.tools.seam.internal.core.SeamJavaComponentDeclaration; import org.jboss.tools.seam.internal.core.el.SeamELCompletionEngine; import org.jboss.tools.seam.text.ext.SeamExtPlugin; /** * * @author Victor Rubezhny * */ public class SeamComponentHyperlinkDetector extends AbstractHyperlinkDetector { /* * If the hyperlink is performed on the field name that is annotated as @In then * the hyperlink will open a correspondent Seam component * * (non-Javadoc) * @see org.eclipse.jface.text.hyperlink.IHyperlinkDetector#detectHyperlinks(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion, boolean) */ public IHyperlink[] detectHyperlinks(ITextViewer textViewer, IRegion region, boolean canShowMultipleHyperlinks) { ITextEditor textEditor = (ITextEditor) getAdapter(ITextEditor.class); if (region == null || // canShowMultipleHyperlinks || !(textEditor instanceof JavaEditor)) return null; int offset = region.getOffset(); IJavaElement input = EditorUtility.getEditorInputJavaElement(textEditor, false); if (input == null) return null; if (input.getResource() == null || input.getResource().getProject() == null) return null; ISeamProject seamProject = SeamCorePlugin.getSeamProject(input.getResource().getProject(), true); if (seamProject == null) { return null; } SeamELCompletionEngine engine = new SeamELCompletionEngine(); IDocument document = textEditor.getDocumentProvider().getDocument(textEditor.getEditorInput()); IRegion wordRegion = JavaWordFinder.findWord(document, offset); if (wordRegion == null) return null; IFile file = null; try { IResource resource = input.getCorrespondingResource(); if (resource instanceof IFile) file = (IFile) resource; } catch (JavaModelException e) { // It is probably because of Java element's resource is not found SeamExtPlugin.getDefault().logError(e); } int[] range = new int[] { wordRegion.getOffset(), wordRegion.getOffset() + wordRegion.getLength() }; IJavaElement[] elements = null; try { elements = ((ICodeAssist) input).codeSelect(wordRegion.getOffset(), wordRegion.getLength()); if (elements == null) return null; if (elements.length != 1) return null; ArrayList<IHyperlink> hyperlinks = new ArrayList<IHyperlink>(); if (elements[0] instanceof IAnnotatable) { IAnnotatable annotatable = (IAnnotatable) elements[0]; IAnnotation annotation = annotatable.getAnnotation("In"); if (annotation == null || !annotation.exists()) return null; String nameToSearch = elements[0].getElementName(); IMemberValuePair[] mvPairs = annotation.getMemberValuePairs(); if (mvPairs != null) { for (IMemberValuePair mvPair : mvPairs) { if ("value".equals(mvPair.getMemberName()) && mvPair.getValue() != null) { String name = mvPair.getValue().toString(); if (name != null && name.trim().length() != 0) { nameToSearch = name; break; } } } } if (nameToSearch == null && nameToSearch.trim().length() == 0) return null; ISeamJavaComponentDeclaration declaration = null; if (file != null) { Set<ISeamComponent> cs = seamProject.getComponentsByPath(file.getFullPath()); for (ISeamComponent c : cs) { ISeamJavaComponentDeclaration d = c.getJavaDeclaration(); if (d != null && file.getFullPath().equals(d.getSourcePath()) && !((SeamJavaComponentDeclaration) d).getImports().isEmpty()) { declaration = d; } } } Set<ISeamContextVariable> vars = seamProject.getVariables(declaration); if (vars != null) { for (ISeamContextVariable var : vars) { if (nameToSearch.equals(var.getName())) { while (var instanceof ISeamContextShortVariable) { var = ((ISeamContextShortVariable) var).getOriginal(); } if (var == null) continue; if (var instanceof ISeamXmlFactory) { ISeamXmlFactory xmlFactory = (ISeamXmlFactory) var; String value = xmlFactory.getValue(); if (value == null || value.trim().length() == 0) { value = xmlFactory.getMethod(); } if (value == null || value.trim().length() == 0) continue; List<IJavaElement> javaElements = null; try { javaElements = engine.getJavaElementsForExpression(seamProject, file, value, region.getOffset()); } catch (StringIndexOutOfBoundsException e) { SeamExtPlugin.getDefault().logError(e); } catch (BadLocationException e) { SeamExtPlugin.getDefault().logError(e); } if (javaElements != null) { for (IJavaElement javaElement : javaElements) { String resourceName = null; if (javaElement.getResource() != null) { resourceName = javaElement.getResource().getName(); } hyperlinks.add(new SeamComponentHyperlink(wordRegion, resourceName, javaElement, nameToSearch)); } } } else if (var instanceof ISeamComponent) { String resourceName = null; ISeamComponent comp = (ISeamComponent) var; Set<ISeamComponentDeclaration> decls = comp.getAllDeclarations(); for (ISeamComponentDeclaration decl : decls) { if (decl.getResource() != null) { resourceName = decl.getResource().getName(); break; } } hyperlinks.add(new SeamComponentHyperlink(wordRegion, resourceName, (ISeamComponent) var, nameToSearch)); } else if (var instanceof IRole) { String resourceName = null; if (var.getResource() != null) { resourceName = var.getResource().getName(); } hyperlinks.add(new SeamComponentHyperlink(wordRegion, resourceName, (IRole) var, nameToSearch)); } else if (var instanceof IBijectedAttribute) { String resourceName = null; if (var.getResource() != null) { resourceName = var.getResource().getName(); } IBijectedAttribute attr = (IBijectedAttribute) var; if (attr.getSourceMember() != null) { hyperlinks.add(new SeamComponentHyperlink(wordRegion, resourceName, (IBijectedAttribute) var, nameToSearch)); } } } } } } if (hyperlinks != null && !hyperlinks.isEmpty()) { return (IHyperlink[]) hyperlinks.toArray(new IHyperlink[hyperlinks.size()]); } } catch (JavaModelException jme) { SeamExtPlugin.getDefault().logError(jme); } return null; } }