org.sonar.java.ast.visitors.LinesVisitor.java Source code

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Here is the source code for org.sonar.java.ast.visitors.LinesVisitor.java

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/*
 * SonarQube Java
 * Copyright (C) 2012 SonarSource
 * dev@sonar.codehaus.org
 *
 * 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.visitors;

import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.io.Files;
import com.sonar.sslr.api.AstNode;
import org.sonar.java.ast.api.JavaMetric;
import org.sonar.java.ast.api.JavaPunctuator;
import org.sonar.squid.api.SourceCode;

import java.io.IOException;
import java.nio.charset.Charset;

public class LinesVisitor extends JavaAstVisitor {

    private final Charset charset;

    public LinesVisitor(Charset charset) {
        this.charset = charset;
    }

    @Override
    public void init() {
        subscribeTo(JavaPunctuator.RWING);
    }

    @Override
    public void visitNode(AstNode astNode) {
        SourceCode sourceCode = getContext().peekSourceCode();
        Preconditions.checkState(sourceCode.getStartAtLine() != -1 && sourceCode.getEndAtLine() != -1);
        sourceCode.setMeasure(JavaMetric.LINES, sourceCode.getEndAtLine() - sourceCode.getStartAtLine() + 1);
    }

    /**
     * Workaround for SSLRSQBR-10
     */
    @Override
    public void leaveFile(AstNode astNode) {
        if (astNode == null) {
            // TODO do not compute number of lines, when not able to parse
            return;
        }
        try {
            String content = Files.toString(getContext().getFile(), charset);
            String[] lines = content.split("(\r)?\n|\r", -1);
            getContext().peekSourceCode().setMeasure(JavaMetric.LINES, lines.length);
        } catch (IOException e) {
            throw Throwables.propagate(e);
        }
    }

}