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/**********************************************************************
* This file is part of "Object Teams Development Tooling"-Software
*
* Copyright 2005, 2009 Fraunhofer Gesellschaft, Munich, Germany,
* for its Fraunhofer Institute for Computer Architecture and Software
* Technology (FIRST), Berlin, Germany and Technical University Berlin,
* Germany.
*
* 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
* $Id: RoleBindingChangedListener.java 23435 2010-02-04 00:14:38Z stephan $
*
* Please visit http://www.eclipse.org/objectteams for updates and contact.
*
* Contributors:
* Fraunhofer FIRST - Initial API and implementation
* Technical University Berlin - Initial API and implementation
**********************************************************************/
package org.eclipse.objectteams.otdt.internal.ui.callinmarkers;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.resources.IResource;
import org.eclipse.jdt.core.ElementChangedEvent;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IElementChangedListener;
import org.eclipse.jdt.core.IField;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaElementDelta;
import org.eclipse.jdt.core.IMember;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.IParent;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jface.action.IStatusLineManager;
import org.eclipse.objectteams.otdt.core.IMethodMapping;
import org.eclipse.objectteams.otdt.core.IOTType;
import org.eclipse.objectteams.otdt.core.IRoleType;
import org.eclipse.objectteams.otdt.core.OTModelManager;
import org.eclipse.objectteams.otdt.ui.OTDTUIPlugin;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPartSite;
/**
* This listener receives notification of changes to any java elements.
* It reacts upon:
* <ul>
* <li>changes to methods inside base classes;
* when a bound base method is removed or added
* a callin marker is removed or newly created respectively.
* <li>changes to a role class;
* these trigger that callin markers for its baseclass need to be re-computed.
* </ul>
*
* @author brcan
* @version $Id: RoleBindingChangedListener.java 23435 2010-02-04 00:14:38Z stephan $
*/
public class RoleBindingChangedListener implements IElementChangedListener
{
public void elementChanged(ElementChangedEvent event)
{
Set<ICompilationUnit> invalidatedCUs = new HashSet<ICompilationUnit>();
updateCallinMarkers(new IJavaElementDelta[] { event.getDelta() }, invalidatedCUs);
for (ICompilationUnit cu : invalidatedCUs)
OTDTUIPlugin.getDefault().getCallinMarkerCreator().invalidateBaseMarkable(new ResourceMarkable(cu.getResource()));
}
private void updateCallinMarkers(IJavaElementDelta[] deltas, Set<ICompilationUnit> invalidatedCUs)
{
if (deltas != null)
{
// if (deltas.length > 0)
// _CallinMarkerCreator2.reset();
Set<IOTType> invalidatedRoles = new HashSet<IOTType>();
Set<IMember> addedBaseMembers = new HashSet<IMember>();
ICompilationUnit curCU = null;
for (int idx = 0; idx < deltas.length; idx++)
{
IJavaElementDelta curDelta = deltas[idx];
final IJavaElement curElem = curDelta.getElement();
// check for nested deltas
if (curElem instanceof IParent)
{
// visit child's deltas recursively
updateCallinMarkers(curDelta.getAffectedChildren(), invalidatedCUs);
}
// addition/removal of role types:
if ( curElem instanceof IType
&& ( curDelta.getKind() == IJavaElementDelta.REMOVED
|| curDelta.getKind() == IJavaElementDelta.ADDED
|| curDelta.getFlags() == IJavaElementDelta.F_SUPER_TYPES))
{
IType roleType = (IType)curElem;
IOTType otType = OTModelManager.getOTElement(roleType);
if (otType != null && otType.isRole()) {
if (invalidatedRoles.add(otType)) // only if not already handled
invalidateRole((IRoleType)otType, roleType);
}
}
// changes of base methods & fields:
if (curElem instanceof IMethod || curElem instanceof IField)
{
handleDeltaKind(curDelta, (IMember)curElem, addedBaseMembers);
curCU = ((IMember)curElem).getCompilationUnit();
}
// any changes in method mappings:
if (curElem instanceof IMethodMapping) {
// changes in method mappings invalidate the current role's baseclass:
IJavaElement parent = curElem.getParent();
if (parent instanceof IRoleType) {
IRoleType roleParent = (IRoleType)parent;
if (invalidatedRoles.add(roleParent)) // only if not already handled
invalidateRole(roleParent, (IType) roleParent.getCorrespondingJavaElement());
}
}
}
if (!addedBaseMembers.isEmpty()) {
if (addedBaseMembers.size() < 3 && !invalidatedCUs.contains(curCU))
for (IMember baseMember : addedBaseMembers)
baseMemberAdded(baseMember);
else
invalidatedCUs.add(curCU);
}
}
}
private void invalidateRole(IRoleType otType, IType roleType) {
IType baseClass = null;
try {
baseClass = otType.getBaseClass();
} catch (JavaModelException e) {
/* ignore, proceed with null baseclass */
}
OTDTUIPlugin.getDefault().getCallinMarkerCreator().invalidateRole(roleType, baseClass);
}
private void handleDeltaKind(IJavaElementDelta delta, IMember baseMember, Set<IMember> addedBaseMembers)
{
if (delta.getKind() == IJavaElementDelta.ADDED)
{
// don't yet handle, first count how many additions we have
addedBaseMembers.add(baseMember);
}
else if (delta.getKind() == IJavaElementDelta.REMOVED)
{
baseMemberRemoved(baseMember, baseMember.getResource());
}
}
// when renaming a method/field, we apparently get first an add-event, then a remove event.
private void baseMemberAdded(IMember baseMember)
{
IStatusLineManager statusLine = null;
IWorkbenchPage page = OTDTUIPlugin.getActivePage();
if (page != null && page.getActivePart() != null)
{
IWorkbenchPartSite site = page.getActivePart().getSite();
if (site instanceof IViewSite)
statusLine = ((IViewSite) site).getActionBars().getStatusLineManager();
}
OTDTUIPlugin.getDefault().getCallinMarkerCreator().updateCallinMarker(baseMember, statusLine);
}
private void baseMemberRemoved(IMember baseMember, IResource resource)
{
CallinMarkerRemover.removeCallinMarker(baseMember, resource);
}
}
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