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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.migration;
import com.intellij.psi.*;
import java.util.*;
class IfStatementBranch {
private final Set<String> topLevelVariables = new HashSet<String>(3);
private final LinkedList<String> comments = new LinkedList<String>();
private final LinkedList<String> statementComments = new LinkedList<String>();
private final List<PsiExpression> conditions = new ArrayList<PsiExpression>(3);
private final PsiStatement statement;
private final boolean elseBranch;
public IfStatementBranch(PsiStatement branch, boolean elseBranch) {
statement = branch;
this.elseBranch = elseBranch;
calculateVariablesDeclared(statement);
}
public void addComment(String comment) {
comments.addFirst(comment);
}
public void addStatementComment(String comment) {
statementComments.addFirst(comment);
}
public void addCaseExpression(PsiExpression expression) {
conditions.add(expression);
}
public PsiStatement getStatement() {
return statement;
}
public List<PsiExpression> getConditions() {
return Collections.unmodifiableList(conditions);
}
public boolean isElse() {
return elseBranch;
}
public boolean topLevelDeclarationsConflictWith(
IfStatementBranch testBranch) {
final Set<String> topLevel = testBranch.topLevelVariables;
return intersects(topLevelVariables, topLevel);
}
private static boolean intersects(Set<String> set1,
Set<String> set2) {
for (final String s : set1) {
if (set2.contains(s)) {
return true;
}
}
return false;
}
public List<String> getComments() {
return comments;
}
public List<String> getStatementComments() {
return statementComments;
}
public void calculateVariablesDeclared(PsiStatement statement) {
if (statement == null) {
return;
}
if (statement instanceof PsiDeclarationStatement) {
final PsiDeclarationStatement declarationStatement =
(PsiDeclarationStatement)statement;
final PsiElement[] elements =
declarationStatement.getDeclaredElements();
for (PsiElement element : elements) {
final PsiVariable variable = (PsiVariable)element;
final String varName = variable.getName();
topLevelVariables.add(varName);
}
}
else if (statement instanceof PsiBlockStatement) {
final PsiBlockStatement block = (PsiBlockStatement)statement;
final PsiCodeBlock codeBlock = block.getCodeBlock();
final PsiStatement[] statements = codeBlock.getStatements();
for (PsiStatement statement1 : statements) {
calculateVariablesDeclared(statement1);
}
}
}
}
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