| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.core; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.jdt.core.IBuffer; |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IJavaModelStatus; |
| import org.eclipse.jdt.core.IJavaModelStatusConstants; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| /** |
| * Commits the contents of a working copy compilation |
| * unit to its original element and resource, bringing |
| * the Java Model up-to-date with the current contents of the working |
| * copy. |
| * |
| * <p>It is possible that the contents of the |
| * original resource have changed since the working copy was created, |
| * in which case there is an update conflict. This operation allows |
| * for two settings to resolve conflict set by the <code>fForce</code> flag:<ul> |
| * <li>force flag is <code>false</code> - in this case an <code>JavaModelException</code> |
| * is thrown</li> |
| * <li>force flag is <code>true</code> - in this case the contents of |
| * the working copy are applied to the underlying resource even though |
| * the working copy was created before a subsequent change in the |
| * resource</li> |
| * </ul> |
| * |
| * <p>The default conflict resolution setting is the force flag is <code>false</code> |
| * |
| * A JavaModelOperation exception is thrown either if the commit could not |
| * be performed or if the new content of the compilation unit violates some Java Model |
| * constraint (e.g. if the new package declaration doesn't match the name of the folder |
| * containing the compilation unit). |
| */ |
| public class CommitWorkingCopyOperation extends JavaModelOperation { |
| /** |
| * Constructs an operation to commit the contents of a working copy |
| * to its original compilation unit. |
| */ |
| public CommitWorkingCopyOperation(ICompilationUnit element, boolean force) { |
| super(new IJavaElement[] {element}, force); |
| } |
| /** |
| * @exception JavaModelException if setting the source |
| * of the original compilation unit fails |
| */ |
| protected void executeOperation() throws JavaModelException { |
| try { |
| beginTask(Util.bind("workingCopy.commit"), 2); //$NON-NLS-1$ |
| WorkingCopy copy = (WorkingCopy)getCompilationUnit(); |
| ICompilationUnit original = (ICompilationUnit) copy.getOriginalElement(); |
| |
| |
| // creates the delta builder (this remembers the content of the cu) |
| if (!original.isOpen()) { |
| // force opening so that the delta builder can get the old info |
| original.open(null); |
| } |
| JavaElementDeltaBuilder deltaBuilder; |
| if (Util.isExcluded(original)) { |
| deltaBuilder = null; |
| } else { |
| deltaBuilder = new JavaElementDeltaBuilder(original); |
| } |
| |
| // save the cu |
| IBuffer originalBuffer = original.getBuffer(); |
| if (originalBuffer == null) return; |
| char[] originalContents = originalBuffer.getCharacters(); |
| boolean hasSaved = false; |
| try { |
| IBuffer copyBuffer = copy.getBuffer(); |
| if (copyBuffer == null) return; |
| originalBuffer.setContents(copyBuffer.getCharacters()); |
| original.save(fMonitor, fForce); |
| this.setAttribute(HAS_MODIFIED_RESOURCE_ATTR, TRUE); |
| hasSaved = true; |
| } finally { |
| if (!hasSaved){ |
| // restore original buffer contents since something went wrong |
| originalBuffer.setContents(originalContents); |
| } |
| } |
| // make sure working copy is in sync |
| copy.updateTimeStamp((CompilationUnit)original); |
| copy.makeConsistent(this); |
| worked(1); |
| |
| if (deltaBuilder != null) { |
| // build the deltas |
| deltaBuilder.buildDeltas(); |
| |
| // add the deltas to the list of deltas created during this operation |
| if (deltaBuilder.delta != null) { |
| addDelta(deltaBuilder.delta); |
| } |
| } |
| worked(1); |
| } finally { |
| done(); |
| } |
| } |
| /** |
| * Returns the compilation unit this operation is working on. |
| */ |
| protected ICompilationUnit getCompilationUnit() { |
| return (ICompilationUnit)getElementToProcess(); |
| } |
| /** |
| * Possible failures: <ul> |
| * <li>INVALID_ELEMENT_TYPES - the compilation unit supplied to this |
| * operation is not a working copy |
| * <li>ELEMENT_NOT_PRESENT - the compilation unit the working copy is |
| * based on no longer exists. |
| * <li>UPDATE_CONFLICT - the original compilation unit has changed since |
| * the working copy was created and the operation specifies no force |
| * <li>READ_ONLY - the original compilation unit is in read-only mode |
| * </ul> |
| */ |
| public IJavaModelStatus verify() { |
| ICompilationUnit cu = getCompilationUnit(); |
| if (!cu.isWorkingCopy()) { |
| return new JavaModelStatus(IJavaModelStatusConstants.INVALID_ELEMENT_TYPES, cu); |
| } |
| ICompilationUnit original= (ICompilationUnit)cu.getOriginalElement(); |
| IResource resource = original.getResource(); |
| if (!cu.isBasedOn(resource) && !fForce) { |
| return new JavaModelStatus(IJavaModelStatusConstants.UPDATE_CONFLICT); |
| } |
| // no read-only check, since some repository adapters can change the flag on save |
| // operation. |
| return JavaModelStatus.VERIFIED_OK; |
| } |
| } |