org.sonar.duplications.statement.matcher.BridgeTokenMatcher Maven / Gradle / Ivy
/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.duplications.statement.matcher;
import java.util.List;
import org.sonar.duplications.token.Token;
import org.sonar.duplications.token.TokenQueue;
/**
* Consumes everything between pair of tokens.
*/
public class BridgeTokenMatcher extends TokenMatcher {
private final String lToken;
private final String rToken;
public BridgeTokenMatcher(String lToken, String rToken) {
if (lToken == null || rToken == null) {
throw new IllegalArgumentException();
}
this.lToken = lToken;
this.rToken = rToken;
}
@Override
public boolean matchToken(TokenQueue tokenQueue, List matchedTokenList) {
if (!tokenQueue.isNextTokenValue(lToken)) {
return false;
}
int stack = 0;
while (tokenQueue.peek() != null) {
Token token = tokenQueue.poll();
if (lToken.equals(token.getValue())) {
stack++;
} else if (rToken.equals(token.getValue())) {
stack--;
}
matchedTokenList.add(token);
if (stack == 0) {
return true;
}
}
return false;
}
}