| /******************************************************************************* |
| * Copyright (c) 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Copied from /org.eclipse.jdt.ui/src/org/eclipse/jdt/ui/text/java/correction/ChangeCorrectionProposal.java |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Red Hat Inc. - copy and modify to be used as ChangeCorrectionProposalCore |
| *******************************************************************************/ |
| package org.eclipse.jdt.core.manipulation; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.NullProgressMonitor; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.ltk.core.refactoring.Change; |
| import org.eclipse.ltk.core.refactoring.IUndoManager; |
| import org.eclipse.ltk.core.refactoring.NullChange; |
| import org.eclipse.ltk.core.refactoring.RefactoringCore; |
| import org.eclipse.ltk.core.refactoring.RefactoringStatus; |
| |
| /** |
| * @since 1.11 |
| */ |
| public class ChangeCorrectionProposalCore { |
| protected Change fChange; |
| protected String fName; |
| protected int fRelevance; |
| |
| /** |
| * Constructs a change correction proposal. |
| * |
| * @param name the name that is displayed in the proposal selection dialog |
| * @param change the change that is executed when the proposal is applied or <code>null</code> |
| * if the change will be created by implementors of {@link #createChange()} |
| * @param relevance the relevance of this proposal |
| */ |
| public ChangeCorrectionProposalCore(String name, Change change, int relevance) { |
| if (name == null) { |
| throw new IllegalArgumentException("Name must not be null"); //$NON-NLS-1$ |
| } |
| fName= name; |
| fChange= change; |
| fRelevance= relevance; |
| } |
| |
| public void apply() throws CoreException { |
| performChange(); |
| } |
| |
| /** |
| * Performs the change associated with this proposal. |
| * <p> |
| * Subclasses may extend, but must call the super implementation. |
| * |
| * @throws CoreException |
| * when the invocation of the change failed |
| */ |
| protected void performChange() throws CoreException { |
| |
| Change change= null; |
| try { |
| change= getChange(); |
| if (change != null) { |
| |
| change.initializeValidationData(new NullProgressMonitor()); |
| RefactoringStatus valid= change.isValid(new NullProgressMonitor()); |
| if (valid.hasFatalError()) { |
| IStatus status = new Status(IStatus.ERROR, JavaManipulation.getPreferenceNodeId(), IStatus.ERROR, |
| valid.getMessageMatchingSeverity(RefactoringStatus.FATAL), null); |
| throw new CoreException(status); |
| } else { |
| IUndoManager manager= RefactoringCore.getUndoManager(); |
| Change undoChange; |
| boolean successful= false; |
| try { |
| manager.aboutToPerformChange(change); |
| undoChange= change.perform(new NullProgressMonitor()); |
| successful= true; |
| } finally { |
| manager.changePerformed(change, successful); |
| } |
| if (undoChange != null) { |
| undoChange.initializeValidationData(new NullProgressMonitor()); |
| manager.addUndo(getName(), undoChange); |
| } |
| } |
| } |
| } finally { |
| |
| if (change != null) { |
| change.dispose(); |
| } |
| change= null; |
| } |
| } |
| |
| @SuppressWarnings("unused") |
| public Object getAdditionalProposalInfo(IProgressMonitor monitor) { |
| StringBuilder buf= new StringBuilder(); |
| buf.append("<p>"); //$NON-NLS-1$ |
| try { |
| Change change= getChange(); |
| if (change != null) { |
| String name= change.getName(); |
| if (name.length() == 0) { |
| return null; |
| } |
| buf.append(name); |
| } else { |
| return null; |
| } |
| } catch (CoreException e) { |
| buf.append("Unexpected error when accessing this proposal:<p><pre>"); //$NON-NLS-1$ |
| buf.append(e.getLocalizedMessage()); |
| buf.append("</pre>"); //$NON-NLS-1$ |
| } |
| buf.append("</p>"); //$NON-NLS-1$ |
| return buf.toString(); |
| } |
| |
| /** |
| * Returns the name of the proposal. |
| * |
| * @return the name of the proposal |
| */ |
| public String getName() { |
| return fName; |
| } |
| |
| /** |
| * Returns the change that will be executed when the proposal is applied. |
| * This method calls {@link #createChange()} to compute the change. |
| * |
| * @return the change for this proposal, can be <code>null</code> in rare cases if creation of |
| * the change failed |
| * @throws CoreException when the change could not be created |
| */ |
| public Change getChange() throws CoreException { |
| synchronized (this) { |
| if (fChange == null) { |
| fChange = createChange(); |
| } |
| } |
| return fChange; |
| } |
| |
| /** |
| * Creates the change for this proposal. |
| * This method is only called once and only when no change has been passed in |
| * {#ChangeCorrectionProposal(String, Change, int, Image)}. |
| * |
| * Subclasses may override. |
| * |
| * @return the created change |
| * @throws CoreException if the creation of the change failed |
| */ |
| protected Change createChange() throws CoreException { |
| return new NullChange(); |
| } |
| |
| /** |
| * Sets the display name. |
| * |
| * @param name the name to set |
| */ |
| public void setDisplayName(String name) { |
| if (name == null) { |
| throw new IllegalArgumentException("Name must not be null"); //$NON-NLS-1$ |
| } |
| fName= name; |
| } |
| |
| public int getRelevance() { |
| return fRelevance; |
| } |
| |
| /** |
| * Sets the relevance. |
| * |
| * @param relevance the relevance to set |
| * |
| * @see #getRelevance() |
| */ |
| public void setRelevance(int relevance) { |
| fRelevance= relevance; |
| } |
| |
| } |