| /* |
| * Copyright 2003-2013 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.psiutils; |
| |
| import com.intellij.psi.JavaTokenType; |
| import com.intellij.psi.PsiExpression; |
| import com.intellij.psi.PsiPolyadicExpression; |
| import com.intellij.psi.tree.IElementType; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| public class ComparisonUtils { |
| |
| private ComparisonUtils() {} |
| |
| private static final Set<IElementType> s_comparisonTokens = new HashSet<IElementType>(6); |
| |
| private static final Map<IElementType, String> s_swappedComparisons = new HashMap<IElementType, String>(6); |
| |
| private static final Map<IElementType, String> s_invertedComparisons = new HashMap<IElementType, String>(6); |
| |
| static { |
| s_comparisonTokens.add(JavaTokenType.EQEQ); |
| s_comparisonTokens.add(JavaTokenType.NE); |
| s_comparisonTokens.add(JavaTokenType.GT); |
| s_comparisonTokens.add(JavaTokenType.LT); |
| s_comparisonTokens.add(JavaTokenType.GE); |
| s_comparisonTokens.add(JavaTokenType.LE); |
| |
| s_swappedComparisons.put(JavaTokenType.EQEQ, "=="); |
| s_swappedComparisons.put(JavaTokenType.NE, "!="); |
| s_swappedComparisons.put(JavaTokenType.GT, "<"); |
| s_swappedComparisons.put(JavaTokenType.LT, ">"); |
| s_swappedComparisons.put(JavaTokenType.GE, "<="); |
| s_swappedComparisons.put(JavaTokenType.LE, ">="); |
| |
| s_invertedComparisons.put(JavaTokenType.EQEQ, "!="); |
| s_invertedComparisons.put(JavaTokenType.NE, "=="); |
| s_invertedComparisons.put(JavaTokenType.GT, "<="); |
| s_invertedComparisons.put(JavaTokenType.LT, ">="); |
| s_invertedComparisons.put(JavaTokenType.GE, "<"); |
| s_invertedComparisons.put(JavaTokenType.LE, ">"); |
| } |
| |
| public static boolean isComparison(@Nullable PsiExpression expression) { |
| if (!(expression instanceof PsiPolyadicExpression)) { |
| return false; |
| } |
| final PsiPolyadicExpression polyadicExpression = (PsiPolyadicExpression)expression; |
| final IElementType tokenType = polyadicExpression.getOperationTokenType(); |
| return isComparisonOperation(tokenType); |
| } |
| |
| public static boolean isComparisonOperation(IElementType tokenType) { |
| return s_comparisonTokens.contains(tokenType); |
| } |
| |
| public static String getFlippedComparison(IElementType tokenType) { |
| return s_swappedComparisons.get(tokenType); |
| } |
| |
| public static boolean isEqualityComparison(@NotNull PsiExpression expression) { |
| if (!(expression instanceof PsiPolyadicExpression)) { |
| return false; |
| } |
| final PsiPolyadicExpression polyadicExpression = (PsiPolyadicExpression)expression; |
| final IElementType tokenType = polyadicExpression.getOperationTokenType(); |
| return tokenType.equals(JavaTokenType.EQEQ) || tokenType.equals(JavaTokenType.NE); |
| } |
| |
| public static String getNegatedComparison(IElementType tokenType) { |
| return s_invertedComparisons.get(tokenType); |
| } |
| } |