| /******************************************************************************* |
| * Copyright (c) 2000, 2017 IBM Corporation and others. |
| * 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.corext.refactoring.changes; |
| |
| import org.eclipse.core.resources.IWorkspaceRunnable; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.dltk.core.DLTKCore; |
| import org.eclipse.dltk.internal.core.manipulation.ScriptManipulationPlugin; |
| import org.eclipse.dltk.internal.corext.refactoring.RefactoringCoreMessages; |
| import org.eclipse.ltk.core.refactoring.Change; |
| import org.eclipse.ltk.core.refactoring.CompositeChange; |
| import org.eclipse.ltk.core.refactoring.RefactoringStatus; |
| |
| public class DynamicValidationStateChange extends CompositeChange implements WorkspaceTracker.Listener { |
| |
| private boolean fListenerRegistered = false; |
| private RefactoringStatus fValidationState = null; |
| private long fTimeStamp; |
| |
| // 30 minutes |
| private static final long LIFE_TIME = 30 * 60 * 1000; |
| |
| public DynamicValidationStateChange(Change change) { |
| super(change.getName()); |
| add(change); |
| markAsSynthetic(); |
| } |
| |
| public DynamicValidationStateChange(String name) { |
| super(name); |
| markAsSynthetic(); |
| } |
| |
| public DynamicValidationStateChange(String name, Change[] changes) { |
| super(name, changes); |
| markAsSynthetic(); |
| } |
| |
| @Override |
| public void initializeValidationData(IProgressMonitor pm) { |
| super.initializeValidationData(pm); |
| WorkspaceTracker.INSTANCE.addListener(this); |
| fListenerRegistered = true; |
| fTimeStamp = System.currentTimeMillis(); |
| } |
| |
| @Override |
| public void dispose() { |
| if (fListenerRegistered) { |
| WorkspaceTracker.INSTANCE.removeListener(this); |
| fListenerRegistered = false; |
| } |
| super.dispose(); |
| } |
| |
| @Override |
| public RefactoringStatus isValid(IProgressMonitor pm) throws CoreException { |
| if (fValidationState == null) { |
| return super.isValid(pm); |
| } |
| return fValidationState; |
| } |
| |
| @Override |
| public Change perform(IProgressMonitor pm) throws CoreException { |
| final Change[] result = new Change[1]; |
| IWorkspaceRunnable runnable = monitor -> result[0] = DynamicValidationStateChange.super.perform(monitor); |
| DLTKCore.run(runnable, pm); |
| return result[0]; |
| } |
| |
| @Override |
| protected Change createUndoChange(Change[] childUndos) { |
| DynamicValidationStateChange result = new DynamicValidationStateChange(getName()); |
| for (int i = 0; i < childUndos.length; i++) { |
| result.add(childUndos[i]); |
| } |
| return result; |
| } |
| |
| @Override |
| public void workspaceChanged() { |
| long currentTime = System.currentTimeMillis(); |
| if (currentTime - fTimeStamp < LIFE_TIME) |
| return; |
| fValidationState = RefactoringStatus |
| .createFatalErrorStatus(RefactoringCoreMessages.DynamicValidationStateChange_workspace_changed); |
| // remove listener from workspace tracker |
| WorkspaceTracker.INSTANCE.removeListener(this); |
| fListenerRegistered = false; |
| // clear up the children to not hang onto too much memory |
| Change[] children = clear(); |
| for (int i = 0; i < children.length; i++) { |
| final Change change = children[i]; |
| SafeRunner.run(new ISafeRunnable() { |
| @Override |
| public void run() throws Exception { |
| change.dispose(); |
| } |
| |
| @Override |
| public void handleException(Throwable exception) { |
| ScriptManipulationPlugin.log(exception); |
| } |
| }); |
| } |
| } |
| } |