| /******************************************************************************* |
| * Copyright (c) 2019, 2020 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Red Hat Inc. - copied and modified to create core class |
| *******************************************************************************/ |
| /** |
| * |
| **/ |
| package org.eclipse.jdt.internal.corext.fix; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Hashtable; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IStatus; |
| |
| import org.eclipse.jdt.core.dom.CompilationUnit; |
| import org.eclipse.jdt.core.dom.ForStatement; |
| import org.eclipse.jdt.core.manipulation.ICleanUpFixCore; |
| |
| import org.eclipse.jdt.internal.corext.dom.GenericVisitor; |
| import org.eclipse.jdt.internal.corext.util.JavaModelUtil; |
| |
| public class ConvertLoopFixCore extends CompilationUnitRewriteOperationsFixCore { |
| |
| public final static class ControlStatementFinder extends GenericVisitor { |
| |
| private final List<ConvertLoopOperation> fResult; |
| private final Hashtable<ForStatement, String> fUsedNames; |
| private final boolean fFindForLoopsToConvert; |
| private final boolean fConvertIterableForLoops; |
| private final boolean fMakeFinal; |
| private final boolean fCheckIfLoopVarUsed; |
| private ConvertLoopOperation fParentOperation; |
| |
| public ControlStatementFinder(boolean findForLoopsToConvert, boolean convertIterableForLoops, boolean makeFinal, |
| boolean checkIfLoopVarUsed, List<ConvertLoopOperation> resultingCollection) { |
| fFindForLoopsToConvert= findForLoopsToConvert; |
| fConvertIterableForLoops= convertIterableForLoops; |
| fMakeFinal= makeFinal; |
| fCheckIfLoopVarUsed= checkIfLoopVarUsed; |
| fResult= resultingCollection; |
| fUsedNames= new Hashtable<>(); |
| fParentOperation= null; |
| } |
| |
| @Override |
| public boolean visit(ForStatement node) { |
| if (fFindForLoopsToConvert || fConvertIterableForLoops) { |
| ForStatement current= node; |
| ConvertLoopOperation operation= getConvertOperation(current); |
| if (fParentOperation != null) { |
| fParentOperation.setChildLoopOperation(operation); |
| } |
| fParentOperation= operation; |
| ConvertLoopOperation oldOperation= null; |
| while (operation != null) { |
| if (oldOperation == null) { |
| fResult.add(operation); |
| } else { |
| oldOperation.setBodyConverter(operation); |
| } |
| |
| if (current.getBody() instanceof ForStatement) { |
| current= (ForStatement)current.getBody(); |
| oldOperation= operation; |
| operation= getConvertOperation(current); |
| oldOperation.setChildLoopOperation(operation); |
| fParentOperation= operation; |
| } else { |
| operation= null; |
| } |
| } |
| current.getBody().accept(this); |
| return false; |
| } |
| |
| return super.visit(node); |
| } |
| |
| private ConvertLoopOperation getConvertOperation(ForStatement node) { |
| |
| Collection<String> usedNamesCollection= fUsedNames.values(); |
| String[] usedNames= usedNamesCollection.toArray(new String[usedNamesCollection.size()]); |
| ConvertLoopOperation convertForLoopOperation= new ConvertForLoopOperation(node, usedNames, fMakeFinal, fCheckIfLoopVarUsed); |
| if (convertForLoopOperation.satisfiesPreconditions().isOK()) { |
| if (fFindForLoopsToConvert) { |
| fUsedNames.put(node, convertForLoopOperation.getIntroducedVariableName()); |
| return convertForLoopOperation; |
| } |
| } else if (fConvertIterableForLoops) { |
| ConvertLoopOperation iterableConverter= new ConvertIterableLoopOperation(node, usedNames, fMakeFinal, fCheckIfLoopVarUsed); |
| if (iterableConverter.satisfiesPreconditions().isOK()) { |
| fUsedNames.put(node, iterableConverter.getIntroducedVariableName()); |
| return iterableConverter; |
| } |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public void endVisit(ForStatement node) { |
| if (fFindForLoopsToConvert || fConvertIterableForLoops) { |
| fUsedNames.remove(node); |
| } |
| super.endVisit(node); |
| } |
| |
| } |
| |
| public static ICleanUpFixCore createCleanUp(CompilationUnit compilationUnit, boolean convertForLoops, boolean convertIterableForLoops, |
| boolean makeFinal, boolean checkIfLoopVarUsed) { |
| if (!JavaModelUtil.is50OrHigher(compilationUnit.getJavaElement().getJavaProject())) |
| return null; |
| |
| if (!convertForLoops && !convertIterableForLoops) |
| return null; |
| |
| List<ConvertLoopOperation> operations= new ArrayList<>(); |
| ControlStatementFinder finder= new ControlStatementFinder(convertForLoops, convertIterableForLoops, makeFinal, checkIfLoopVarUsed, operations); |
| compilationUnit.accept(finder); |
| |
| if (operations.isEmpty()) |
| return null; |
| |
| CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[] ops= operations.toArray(new CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[operations.size()]); |
| return new ConvertLoopFixCore(FixMessages.ControlStatementsFix_change_name, compilationUnit, ops, null); |
| } |
| |
| public static ConvertLoopFixCore createConvertForLoopToEnhancedFix(CompilationUnit compilationUnit, ForStatement loop) { |
| ConvertLoopOperation convertForLoopOperation= new ConvertForLoopOperation(loop); |
| if (!convertForLoopOperation.satisfiesPreconditions().isOK()) |
| return null; |
| |
| return new ConvertLoopFixCore(FixMessages.Java50Fix_ConvertToEnhancedForLoop_description, compilationUnit, new CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[] {convertForLoopOperation}, null); |
| } |
| |
| public static ConvertLoopFixCore createConvertIterableLoopToEnhancedFix(CompilationUnit compilationUnit, ForStatement loop) { |
| ConvertIterableLoopOperation loopConverter= new ConvertIterableLoopOperation(loop); |
| IStatus status= loopConverter.satisfiesPreconditions(); |
| if (status.getSeverity() == IStatus.ERROR) |
| return null; |
| |
| return new ConvertLoopFixCore(FixMessages.Java50Fix_ConvertToEnhancedForLoop_description, compilationUnit, new CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[] {loopConverter}, status); |
| } |
| |
| private final IStatus fStatus; |
| |
| protected ConvertLoopFixCore(String name, CompilationUnit compilationUnit, CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[] fixRewriteOperations, IStatus status) { |
| super(name, compilationUnit, fixRewriteOperations); |
| fStatus= status; |
| } |
| |
| @Override |
| public IStatus getStatus() { |
| return fStatus; |
| } |
| |
| } |