org.sonar.flex.checks.TooManyLinesInCaseCheck.java Source code

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Here is the source code for org.sonar.flex.checks.TooManyLinesInCaseCheck.java

Source

/*
 * SonarQube Flex Plugin
 * Copyright (C) 2010 SonarSource
 * sonarqube@googlegroups.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.flex.checks;

import com.google.common.collect.Iterables;
import com.sonar.sslr.api.AstNode;
import org.sonar.check.BelongsToProfile;
import org.sonar.check.Priority;
import org.sonar.check.Rule;
import org.sonar.check.RuleProperty;
import org.sonar.flex.FlexGrammar;
import org.sonar.squidbridge.checks.SquidCheck;
import org.sonar.sslr.parser.LexerlessGrammar;

@Rule(key = "S1151", priority = Priority.MAJOR)
@BelongsToProfile(title = CheckList.SONAR_WAY_PROFILE, priority = Priority.MAJOR)
public class TooManyLinesInCaseCheck extends SquidCheck<LexerlessGrammar> {

    private static final int DEFAULT = 5;

    @RuleProperty(key = "max", defaultValue = "" + DEFAULT)
    int max = DEFAULT;

    @Override
    public void init() {
        subscribeTo(FlexGrammar.CASE_ELEMENT);
    }

    @Override
    public void visitNode(AstNode astNode) {
        AstNode lastLabelNode = Iterables.getLast(astNode.getChildren(FlexGrammar.CASE_LABEL));
        int lines = Math.max(astNode.getNextAstNode().getTokenLine() - lastLabelNode.getTokenLine(), 1);
        if (lines > max) {
            getContext().createLineViolation(this,
                    "Reduce this switch case number of lines from {0} to at most {1}, for example by extracting code into methods.",
                    lastLabelNode, lines, max);
        }
    }

}