/*******************************************************************************
* Copyright (c) 2010 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.cdi.text.ext.hyperlink;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.ISourceRange;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.ITypeRoot;
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.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.IFileEditorInput;
import org.eclipse.ui.texteditor.ITextEditor;
import org.jboss.tools.cdi.core.CDICoreNature;
import org.jboss.tools.cdi.core.CDIUtil;
import org.jboss.tools.cdi.core.IBean;
import org.jboss.tools.cdi.core.ICDIProject;
import org.jboss.tools.cdi.core.IClassBean;
import org.jboss.tools.cdi.core.IInjectionPoint;
import org.jboss.tools.cdi.core.IObserverMethod;
import org.jboss.tools.cdi.core.IParameter;
import org.jboss.tools.cdi.text.ext.CDIExtensionsPlugin;
public class EventAndObserverMethodHyperlinkDetector extends AbstractHyperlinkDetector{
protected IFile file;
public IHyperlink[] detectHyperlinks(ITextViewer textViewer,
IRegion region, boolean canShowMultipleHyperlinks) {
ITextEditor textEditor= (ITextEditor)getAdapter(ITextEditor.class);
if (region == null || !(textEditor instanceof JavaEditor))
return null;
if(textEditor.getEditorInput() instanceof IFileEditorInput){
file = ((IFileEditorInput)textEditor.getEditorInput()).getFile();
}
int offset= region.getOffset();
ITypeRoot input= EditorUtility.getEditorInputJavaElement(textEditor, true);
if (input == null)
return null;
IDocument document= textEditor.getDocumentProvider().getDocument(textEditor.getEditorInput());
IRegion wordRegion= JavaWordFinder.findWord(document, offset);
if (wordRegion == null)
return null;
IProject project = null;
project = input.getJavaProject().getProject();
if(project == null)
return null;
CDICoreNature cdiNature = CDIUtil.getCDINatureWithProgress(project);
if(cdiNature == null)
return null;
IJavaElement[] elements = null;
try {
elements = input.codeSelect(wordRegion.getOffset(), wordRegion.getLength());
if (elements == null)
return null;
if(elements.length != 1)
return null;
ArrayList<IHyperlink> hyperlinks = new ArrayList<IHyperlink>();
int position = 0;
if(elements[0] instanceof IType){
elements[0] = input.getElementAt(wordRegion.getOffset());
if(elements[0] == null)
return null;
if(elements[0] instanceof IMethod){
position = offset;
}
}
ICDIProject cdiProject = CDIUtil.getCDIProject(file, cdiNature, textEditor.isDirty());
if(cdiProject != null){
IInjectionPoint injectionPoint = findInjectedPoint(cdiProject, elements[0], position, input.getPath());
Set<IParameter> param = findObserverParameter(cdiProject, elements[0], offset, input.getPath());
if(injectionPoint != null){
Collection<IObserverMethod> observerMethods = cdiProject.resolveObserverMethods(injectionPoint);
if(observerMethods.size() == 1){
hyperlinks.add(new ObserverMethodHyperlink(region, observerMethods.iterator().next(), document));
}else if(observerMethods.size() > 0){
hyperlinks.add(new ObserverMethodListHyperlink(textViewer, region, observerMethods, document));
}
} else if(param != null) {
Set<IInjectionPoint> events = new HashSet<IInjectionPoint>();
for (IParameter p: param)
events.addAll(cdiProject.findObservedEvents(p));
if(events.size() == 1){
hyperlinks.add(new EventHyperlink(region, events.iterator().next(), document));
}else if(events.size() > 0){
hyperlinks.add(new EventListHyperlink(textViewer, region, events, document));
}
}
}
if (hyperlinks != null && !hyperlinks.isEmpty()) {
return (IHyperlink[])hyperlinks.toArray(new IHyperlink[hyperlinks.size()]);
}
} catch (JavaModelException jme) {
CDIExtensionsPlugin.getDefault().logError(jme);
}
return null;
}
private IInjectionPoint findInjectedPoint(ICDIProject cdiProject, IJavaElement element, int offset, IPath path){
return CDIUtil.findInjectionPoint(cdiProject.getBeans(path), element, offset);
}
private Set<IParameter> findObserverParameter(ICDIProject cdiProject, IJavaElement element, int offset, IPath path) throws JavaModelException {
HashSet<IParameter> result = new HashSet<IParameter>();
for (IBean bean: cdiProject.getBeans(path)) {
if(bean instanceof IClassBean) {
for (IObserverMethod bm: ((IClassBean)bean).getObserverMethods()) {
ISourceRange sr = bm.getMethod().getSourceRange();
if(sr.getOffset() <= offset && sr.getOffset() + sr.getLength() >= offset) {
IObserverMethod obs = (IObserverMethod)bm;
Collection<IParameter> ps = obs.getObservedParameters();
if(!ps.isEmpty()) {
result.add(ps.iterator().next());
}
}
}
}
}
return result;
}
}