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/*
* Copyright 2003-2011 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.openapi.project.Project;
import com.intellij.psi.*;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
import java.util.List;
public class VariableSearchUtils {
private VariableSearchUtils() {
}
public static boolean variableNameResolvesToTarget(
@NotNull String variableName, @NotNull PsiVariable target,
@NotNull PsiElement context) {
final Project project = context.getProject();
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiResolveHelper resolveHelper = psiFacade.getResolveHelper();
final PsiVariable variable =
resolveHelper.resolveAccessibleReferencedVariable(
variableName, context);
return target.equals(variable);
}
public static boolean containsConflictingDeclarations(
PsiCodeBlock block, PsiCodeBlock parentBlock) {
final List<PsiCodeBlock> followingBlocks = new ArrayList();
collectFollowingBlocks(block.getParent().getNextSibling(),
followingBlocks);
final PsiStatement[] statements = block.getStatements();
final Project project = block.getProject();
final JavaPsiFacade facade = JavaPsiFacade.getInstance(project);
final PsiResolveHelper resolveHelper = facade.getResolveHelper();
for (final PsiStatement statement : statements) {
if (!(statement instanceof PsiDeclarationStatement)) {
continue;
}
final PsiDeclarationStatement declaration =
(PsiDeclarationStatement)statement;
final PsiElement[] variables =
declaration.getDeclaredElements();
for (PsiElement variable : variables) {
if (!(variable instanceof PsiLocalVariable)) {
continue;
}
final PsiLocalVariable localVariable =
(PsiLocalVariable)variable;
final String variableName = localVariable.getName();
final PsiVariable target =
resolveHelper.resolveAccessibleReferencedVariable(
variableName, parentBlock);
if (target != null) {
return true;
}
for (PsiCodeBlock codeBlock : followingBlocks) {
final PsiVariable target1 =
resolveHelper.resolveAccessibleReferencedVariable(
variableName, codeBlock);
if (target1 != null) {
return true;
}
}
}
}
return false;
}
/**
* Depth first traversal to find all PsiCodeBlock children.
*/
private static void collectFollowingBlocks(PsiElement element,
List<PsiCodeBlock> out) {
while (element != null) {
if (element instanceof PsiCodeBlock) {
out.add((PsiCodeBlock)element);
}
collectFollowingBlocks(element.getFirstChild(), out);
element = element.getNextSibling();
}
}
}
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