| /******************************************************************************* |
| * Copyright (c) 2021 Fabrice TIERCELIN 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: |
| * Fabrice TIERCELIN - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.corext.fix; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.CoreException; |
| |
| import org.eclipse.text.edits.TextEditGroup; |
| |
| import org.eclipse.jdt.core.dom.AST; |
| import org.eclipse.jdt.core.dom.ASTNode; |
| import org.eclipse.jdt.core.dom.ASTVisitor; |
| import org.eclipse.jdt.core.dom.CompilationUnit; |
| import org.eclipse.jdt.core.dom.Expression; |
| import org.eclipse.jdt.core.dom.IBinding; |
| import org.eclipse.jdt.core.dom.IVariableBinding; |
| import org.eclipse.jdt.core.dom.InfixExpression; |
| import org.eclipse.jdt.core.dom.MethodInvocation; |
| import org.eclipse.jdt.core.dom.Name; |
| import org.eclipse.jdt.core.dom.ThisExpression; |
| import org.eclipse.jdt.core.dom.rewrite.ASTRewrite; |
| import org.eclipse.jdt.core.dom.rewrite.TargetSourceRangeComputer; |
| import org.eclipse.jdt.core.manipulation.ICleanUpFixCore; |
| |
| import org.eclipse.jdt.internal.corext.dom.ASTNodeFactory; |
| import org.eclipse.jdt.internal.corext.dom.ASTNodes; |
| import org.eclipse.jdt.internal.corext.refactoring.structure.CompilationUnitRewrite; |
| |
| import org.eclipse.jdt.internal.ui.fix.MultiFixMessages; |
| |
| public class InvertEqualsFixCore extends CompilationUnitRewriteOperationsFixCore { |
| public static final class InvertEqualsFinder extends ASTVisitor { |
| private List<InvertEqualsFixOperation> fResult; |
| |
| public InvertEqualsFinder(List<InvertEqualsFixOperation> ops) { |
| fResult= ops; |
| } |
| |
| @Override |
| public boolean visit(final MethodInvocation visited) { |
| Expression expression= visited.getExpression(); |
| InfixExpression concatenation= ASTNodes.as(expression, InfixExpression.class); |
| |
| if (expression == null |
| || ASTNodes.is(expression, ThisExpression.class) |
| || isConstant(expression) |
| || concatenation != null && ASTNodes.hasOperator(concatenation, InfixExpression.Operator.PLUS) && ASTNodes.hasType(concatenation, String.class.getCanonicalName())) { |
| return true; |
| } |
| |
| if (ASTNodes.usesGivenSignature(visited, Object.class.getCanonicalName(), "equals", Object.class.getCanonicalName()) //$NON-NLS-1$ |
| || ASTNodes.usesGivenSignature(visited, String.class.getCanonicalName(), "equalsIgnoreCase", String.class.getCanonicalName())) { //$NON-NLS-1$ |
| Expression arg0= (Expression) visited.arguments().get(0); |
| InfixExpression concatenationArgument= ASTNodes.as(arg0, InfixExpression.class); |
| |
| if (isConstant(arg0) && arg0.resolveTypeBinding() != null && !arg0.resolveTypeBinding().isPrimitive() |
| || ASTNodes.is(arg0, ThisExpression.class) |
| || concatenationArgument != null && ASTNodes.hasOperator(concatenationArgument, InfixExpression.Operator.PLUS) && ASTNodes.hasType(concatenationArgument, String.class.getCanonicalName())) { |
| fResult.add(new InvertEqualsFixOperation(expression, arg0)); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| private static boolean isConstant(final Expression expression) { |
| if (expression != null && expression.resolveConstantExpressionValue() != null) { |
| return true; |
| } |
| |
| if (expression instanceof Name) { |
| IBinding binding= ((Name) expression).resolveBinding(); |
| |
| if (binding instanceof IVariableBinding) { |
| return ((IVariableBinding) binding).isEnumConstant(); |
| } |
| } |
| |
| return false; |
| } |
| } |
| |
| public static class InvertEqualsFixOperation extends CompilationUnitRewriteOperation { |
| private final Expression expression; |
| private final Expression arg0; |
| |
| public InvertEqualsFixOperation(final Expression expression, final Expression arg0) { |
| this.expression= expression; |
| this.arg0= arg0; |
| } |
| |
| @Override |
| public void rewriteAST(final CompilationUnitRewrite cuRewrite, final LinkedProposalModelCore linkedModel) throws CoreException { |
| ASTRewrite rewrite= cuRewrite.getASTRewrite(); |
| AST ast= cuRewrite.getRoot().getAST(); |
| TextEditGroup group= createTextEditGroup(MultiFixMessages.InvertEqualsCleanUp_description, cuRewrite); |
| rewrite.setTargetSourceRangeComputer(new TargetSourceRangeComputer() { |
| @Override |
| public SourceRange computeSourceRange(final ASTNode nodeWithComment) { |
| if (Boolean.TRUE.equals(nodeWithComment.getProperty(ASTNodes.UNTOUCH_COMMENT))) { |
| return new SourceRange(nodeWithComment.getStartPosition(), nodeWithComment.getLength()); |
| } |
| |
| return super.computeSourceRange(nodeWithComment); |
| } |
| }); |
| |
| |
| ASTNodes.replaceButKeepComment(rewrite, expression, ASTNodeFactory.parenthesizeIfNeeded(ast, ASTNodes.createMoveTarget(rewrite, arg0)), group); |
| ASTNodes.replaceButKeepComment(rewrite, arg0, ASTNodes.createMoveTarget(rewrite, ASTNodes.getUnparenthesedExpression(expression)), group); |
| } |
| } |
| |
| |
| public static ICleanUpFixCore createCleanUp(final CompilationUnit compilationUnit) { |
| List<InvertEqualsFixOperation> operations= new ArrayList<>(); |
| InvertEqualsFinder finder= new InvertEqualsFinder(operations); |
| compilationUnit.accept(finder); |
| |
| if (operations.isEmpty()) { |
| return null; |
| } |
| |
| CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[] ops= operations.toArray(new CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[0]); |
| return new InvertEqualsFixCore(FixMessages.InvertEqualsFix_invert, compilationUnit, ops); |
| } |
| |
| protected InvertEqualsFixCore(final String name, final CompilationUnit compilationUnit, final CompilationUnitRewriteOperationsFixCore.CompilationUnitRewriteOperation[] fixRewriteOperations) { |
| super(name, compilationUnit, fixRewriteOperations); |
| } |
| } |