| /* |
| * Copyright 2003-2007 Dave Griffith, Bas Leijdekkers |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.siyeh.ig.j2me; |
| |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.HardcodedMethodConstants; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.InspectionGadgetsFix; |
| import com.siyeh.ig.PsiReplacementUtil; |
| import com.siyeh.ig.psiutils.TypeUtils; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class SingleCharacterStartsWithInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "single.character.startswith.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "single.character.startswith.problem.descriptor"); |
| } |
| |
| @Override |
| @Nullable |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new SingleCharacterStartsWithFix(); |
| } |
| |
| private static class SingleCharacterStartsWithFix |
| extends InspectionGadgetsFix { |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message( |
| "single.character.startswith.quickfix"); |
| } |
| |
| @Override |
| protected void doFix(Project project, ProblemDescriptor descriptor) |
| throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| final PsiReferenceExpression methodExpression = |
| (PsiReferenceExpression)element.getParent(); |
| final PsiMethodCallExpression methodCall = |
| (PsiMethodCallExpression)methodExpression.getParent(); |
| final PsiElement qualifier = methodExpression.getQualifier(); |
| if (qualifier == null) { |
| return; |
| } |
| final PsiExpressionList argumentList = methodCall.getArgumentList(); |
| final PsiExpression[] expressions = argumentList.getExpressions(); |
| final PsiExpression expression = expressions[0]; |
| final String expressionText = expression.getText(); |
| String character = expressionText.substring(1, |
| expressionText.length() - 1); |
| if (character.equals("'")) { |
| character = "\\'"; |
| } |
| final String qualifierText = qualifier.getText(); |
| @NonNls final String newExpression; |
| final String referenceName = methodExpression.getReferenceName(); |
| if (HardcodedMethodConstants.STARTS_WITH.equals(referenceName)) { |
| newExpression = qualifierText + ".length() > 0 && " + |
| qualifierText + ".charAt(0) == '" + character + '\''; |
| } |
| else { |
| newExpression = qualifierText + ".length() > 0 && " + |
| qualifierText + ".charAt(" + qualifierText + |
| ".length() - 1) == '" + character + '\''; |
| } |
| PsiReplacementUtil.replaceExpression(methodCall, newExpression); |
| } |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new SingleCharacterStartsWithVisitor(); |
| } |
| |
| private static class SingleCharacterStartsWithVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitMethodCallExpression( |
| @NotNull PsiMethodCallExpression call) { |
| super.visitMethodCallExpression(call); |
| final PsiReferenceExpression methodExpression = |
| call.getMethodExpression(); |
| final String methodName = methodExpression.getReferenceName(); |
| if (!HardcodedMethodConstants.STARTS_WITH.equals(methodName) && |
| !HardcodedMethodConstants.ENDS_WITH.equals(methodName)) { |
| return; |
| } |
| final PsiExpressionList argumentList = call.getArgumentList(); |
| final PsiExpression[] args = argumentList.getExpressions(); |
| if (args.length != 1 && args.length != 2) { |
| return; |
| } |
| if (!isSingleCharacterStringLiteral(args[0])) { |
| return; |
| } |
| final PsiExpression qualifier = |
| methodExpression.getQualifierExpression(); |
| if (qualifier == null) { |
| return; |
| } |
| final PsiType type = qualifier.getType(); |
| if (!TypeUtils.isJavaLangString(type)) { |
| return; |
| } |
| registerMethodCallError(call); |
| } |
| |
| private static boolean isSingleCharacterStringLiteral( |
| PsiExpression arg) { |
| final PsiType type = arg.getType(); |
| if (!TypeUtils.isJavaLangString(type)) { |
| return false; |
| } |
| if (!(arg instanceof PsiLiteralExpression)) { |
| return false; |
| } |
| final PsiLiteralExpression literal = (PsiLiteralExpression)arg; |
| final String value = (String)literal.getValue(); |
| if (value == null) { |
| return false; |
| } |
| return value.length() == 1; |
| } |
| } |
| } |