| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.core; |
| |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IJavaElementDelta; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| /** |
| * Discards a working copy (decrement its use count and remove its working copy info if the use count is 0) |
| * and signal its removal through a delta. |
| */ |
| public class DiscardWorkingCopyOperation extends JavaModelOperation { |
| |
| public DiscardWorkingCopyOperation(IJavaElement workingCopy) { |
| super(new IJavaElement[] {workingCopy}); |
| } |
| protected void executeOperation() throws JavaModelException { |
| CompilationUnit workingCopy = getWorkingCopy(); |
| |
| int useCount = JavaModelManager.getJavaModelManager().discardPerWorkingCopyInfo(workingCopy); |
| if (useCount == 0) { |
| if (!workingCopy.isPrimary()) { |
| // report removed java delta for a non-primary working copy |
| JavaElementDelta delta = new JavaElementDelta(this.getJavaModel()); |
| delta.removed(workingCopy); |
| addDelta(delta); |
| removeReconcileDelta(workingCopy); |
| } else { |
| if (workingCopy.getResource().isAccessible()) { |
| // report a F_PRIMARY_WORKING_COPY change delta for a primary working copy |
| JavaElementDelta delta = new JavaElementDelta(this.getJavaModel()); |
| delta.changed(workingCopy, IJavaElementDelta.F_PRIMARY_WORKING_COPY); |
| addDelta(delta); |
| } else { |
| // report a REMOVED delta |
| JavaElementDelta delta = new JavaElementDelta(this.getJavaModel()); |
| delta.removed(workingCopy, IJavaElementDelta.F_PRIMARY_WORKING_COPY); |
| addDelta(delta); |
| } |
| } |
| } |
| } |
| /** |
| * Returns the working copy this operation is working on. |
| */ |
| protected CompilationUnit getWorkingCopy() { |
| return (CompilationUnit)getElementToProcess(); |
| } |
| /** |
| * @see JavaModelOperation#isReadOnly |
| */ |
| public boolean isReadOnly() { |
| return true; |
| } |
| } |