org.sonar.plugins.scmactivity.BlameVersionSelector.java Source code

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Here is the source code for org.sonar.plugins.scmactivity.BlameVersionSelector.java

Source

/*
 * Sonar SCM Activity Plugin
 * Copyright (C) 2010 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.plugins.scmactivity;

import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.sonar.api.BatchExtension;
import org.sonar.api.batch.SensorContext;
import org.sonar.api.resources.InputFile;
import org.sonar.api.resources.ProjectFileSystem;
import org.sonar.api.resources.Resource;

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

public class BlameVersionSelector implements BatchExtension {
    private static final Logger LOG = LoggerFactory.getLogger(BlameVersionSelector.class);

    private final Blame blame;
    private final Sha1Generator sha1Generator;
    private final FileToResource fileToResource;
    private final ProjectFileSystem projectFileSystem;

    public BlameVersionSelector(Blame blame, Sha1Generator sha1Generator, FileToResource fileToResource,
            ProjectFileSystem projectFileSystem) {
        this.blame = blame;
        this.sha1Generator = sha1Generator;
        this.fileToResource = fileToResource;
        this.projectFileSystem = projectFileSystem;
    }

    public MeasureUpdate detect(InputFile inputFile, String previousSha1, SensorContext context) {
        File file = inputFile.getFile();

        try {
            Resource resource = fileToResource.toResource(inputFile, context);
            Charset charset = projectFileSystem.getSourceCharset();

            String fileContent = FileUtils.readFileToString(file, charset.name());

            String currentSha1 = sha1Generator.find(fileContent);
            if (currentSha1.equals(previousSha1)) {
                return fileNotChanged(file, resource);
            }

            String[] lines = fileContent.split("(\r)?\n|\r", -1);
            return fileChanged(file, resource, currentSha1, lines.length);
        } catch (IOException e) {
            LOG.error("Unable to get scm information: {}", file, e);
            return MeasureUpdate.NONE;
        }
    }

    private MeasureUpdate fileNotChanged(File file, Resource resource) {
        LOG.debug("File not changed since previous analysis: {}", file);

        return new CopyPreviousMeasures(resource);
    }

    private MeasureUpdate fileChanged(File file, Resource resource, String currentSha1, int lineCount) {
        LOG.debug("File changed since previous analysis: {}", file);

        return blame.save(file, resource, currentSha1, lineCount);
    }
}