org.sonar.erlang.checks.DoNotUseEmptyFlowControlCheck.java Source code

Introduction

Here is the source code for org.sonar.erlang.checks.DoNotUseEmptyFlowControlCheck.java

Source

/*
 * SonarQube Erlang Plugin
 * Copyright (C) 2012 Tamas Kende
 * kende.tamas@gmail.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  02
 */
package org.sonar.erlang.checks;

import com.google.common.base.Predicates;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableList;
import com.sonar.sslr.api.AstNode;

import org.sonar.squidbridge.checks.SquidCheck;
import org.sonar.check.BelongsToProfile;
import org.sonar.check.Cardinality;
import org.sonar.check.Priority;
import org.sonar.check.Rule;
import org.sonar.erlang.parser.ErlangGrammarImpl;
import org.sonar.sslr.parser.LexerlessGrammar;

import java.util.List;

@Rule(key = "DoNotUseEmptyFlowControl", priority = Priority.MINOR, cardinality = Cardinality.SINGLE)
@BelongsToProfile(title = CheckList.REPOSITORY_NAME, priority = Priority.MAJOR)
public class DoNotUseEmptyFlowControlCheck extends SquidCheck<LexerlessGrammar> {

    List<ErlangGrammarImpl> flowControls = ImmutableList.of(ErlangGrammarImpl.ifdefAttr,
            ErlangGrammarImpl.ifndefAttr, ErlangGrammarImpl.elseAttr, ErlangGrammarImpl.endifAttr);

    @Override
    public void init() {
        subscribeTo(ImmutableList
                .copyOf(Collections2.filter(flowControls,
                        Predicates.not(Predicates.equalTo(ErlangGrammarImpl.endifAttr))))
                .toArray(new ErlangGrammarImpl[flowControls.size() - 1]));

    }

    @Override
    public void visitNode(AstNode node) {
        if (flowControls.contains(node.getNextSibling().getType())) {
            getContext().createLineViolation(this, "Do not use empty flow control.", node);
        }

    }

}