| /* |
| * Copyright 2003-2012 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.ipp.trivialif; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| |
| class ExpandBooleanPredicate implements PsiElementPredicate { |
| |
| public boolean satisfiedBy(PsiElement element) { |
| if (!(element instanceof PsiJavaToken)) { |
| return false; |
| } |
| final PsiStatement containingStatement = PsiTreeUtil.getParentOfType(element, PsiStatement.class); |
| if (containingStatement == null) { |
| return false; |
| } |
| return isBooleanReturn(containingStatement) || isBooleanAssignment(containingStatement) || isBooleanDeclaration(containingStatement); |
| } |
| |
| public static boolean isBooleanReturn(PsiStatement statement) { |
| if (!(statement instanceof PsiReturnStatement)) { |
| return false; |
| } |
| final PsiReturnStatement returnStatement = (PsiReturnStatement)statement; |
| final PsiExpression returnValue = returnStatement.getReturnValue(); |
| if (returnValue == null || returnValue instanceof PsiLiteralExpression) { |
| return false; |
| } |
| final PsiType returnType = returnValue.getType(); |
| return PsiType.BOOLEAN.equals(returnType); |
| } |
| |
| public static boolean isBooleanAssignment(PsiStatement statement) { |
| if (!(statement instanceof PsiExpressionStatement)) { |
| return false; |
| } |
| final PsiExpressionStatement expressionStatement = (PsiExpressionStatement)statement; |
| final PsiExpression expression = expressionStatement.getExpression(); |
| if (!(expression instanceof PsiAssignmentExpression)) { |
| return false; |
| } |
| final PsiAssignmentExpression assignment = (PsiAssignmentExpression)expression; |
| final PsiExpression rhs = assignment.getRExpression(); |
| if (rhs == null || rhs instanceof PsiLiteralExpression) { |
| return false; |
| } |
| final PsiType assignmentType = rhs.getType(); |
| return PsiType.BOOLEAN.equals(assignmentType); |
| } |
| |
| public static boolean isBooleanDeclaration(PsiStatement statement) { |
| if (!(statement instanceof PsiDeclarationStatement)) { |
| return false; |
| } |
| final PsiDeclarationStatement declarationStatement = (PsiDeclarationStatement)statement; |
| final PsiElement[] declaredElements = declarationStatement.getDeclaredElements(); |
| if (declaredElements.length != 1) { |
| return false; |
| } |
| final PsiElement element = declaredElements[0]; |
| if (!(element instanceof PsiLocalVariable)) { |
| return false; |
| } |
| final PsiLocalVariable variable = (PsiLocalVariable)element; |
| final PsiExpression initializer = variable.getInitializer(); |
| if (initializer == null || initializer instanceof PsiLiteralExpression) { |
| return false; |
| } |
| final PsiType type = initializer.getType(); |
| return PsiType.BOOLEAN.equals(type); |
| } |
| } |