org.sonar.javascript.checks.SwitchWithNotEnoughCaseCheck Maven / Gradle / Ivy
/*
* SonarQube JavaScript Plugin
* Copyright (C) 2011 SonarSource and Eriks Nukis
* [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.javascript.checks;
import com.sonar.sslr.api.AstNode;
import com.sonar.sslr.squid.checks.SquidCheck;
import org.sonar.check.BelongsToProfile;
import org.sonar.check.Priority;
import org.sonar.check.Rule;
import org.sonar.javascript.parser.EcmaScriptGrammar;
import org.sonar.sslr.parser.LexerlessGrammar;
@Rule(
key = "S1301",
priority = Priority.MINOR)
@BelongsToProfile(title = CheckList.SONAR_WAY_PROFILE, priority = Priority.MINOR)
public class SwitchWithNotEnoughCaseCheck extends SquidCheck {
@Override
public void init() {
subscribeTo(EcmaScriptGrammar.CASE_BLOCK);
}
@Override
public void visitNode(AstNode astNode) {
if (isLessThanThreeCases(astNode)) {
getContext().createLineViolation(this, "Replace this \"switch\" statement with \"if\" statements to increase readability.", astNode);
}
}
public static boolean isLessThanThreeCases(AstNode caseBlock) {
int numberOfCase = 0;
for (AstNode caseClauses : caseBlock.getChildren(EcmaScriptGrammar.CASE_CLAUSES)) {
numberOfCase += caseClauses.getChildren(EcmaScriptGrammar.CASE_CLAUSE).size();
}
if (caseBlock.getFirstChild(EcmaScriptGrammar.DEFAULT_CLAUSE) != null) {
numberOfCase++;
}
return numberOfCase < 3;
}
}