org.sonar.java.ast.parser.AstNodeSanitizer Maven / Gradle / Ivy
/*
* SonarQube Java
* Copyright (C) 2012 SonarSource
* [email protected]
*
* 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 02
*/
package org.sonar.java.ast.parser;
import com.sonar.sslr.api.AstNode;
import com.sonar.sslr.api.Token;
import java.util.List;
public class AstNodeSanitizer {
private int toIndex;
public void sanitize(AstNode astNode) {
toIndex = 0;
doSanitize(astNode);
}
private void doSanitize(AstNode astNode) {
List children = astNode.getChildren();
if (!children.isEmpty()) {
// Compound nodes
Token token = null;
int fromIndex = -1;
for (AstNode child : astNode.getChildren()) {
doSanitize(child);
if (token == null && child.hasToken()) {
token = child.getToken();
}
if (fromIndex == -1) {
fromIndex = child.getFromIndex();
}
}
AstNodeReflector.setToken(astNode, token);
astNode.setFromIndex(fromIndex);
astNode.setToIndex(toIndex);
} else if (astNode.hasToken()) {
// Token wrapper nodes
toIndex = astNode.getToIndex();
} else {
// Empty nodes
astNode.setFromIndex(toIndex);
astNode.setToIndex(toIndex);
}
}
}