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/*
* 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);
}
}
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