org.commonjava.sjbi.sant.mapping.AntMappingReader.java Source code

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Here is the source code for org.commonjava.sjbi.sant.mapping.AntMappingReader.java

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/*
 *  Copyright (C) 2010 John Casey.
 *  
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *  
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.commonjava.sjbi.sant.mapping;

import static org.apache.commons.io.IOUtils.closeQuietly;

import org.commonjava.sjbi.BuildPhase;
import org.commonjava.sjbi.SJBIException;
import org.commonjava.sjbi.sant.SimpleAntContext;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

public class AntMappingReader {
    public static final String FILENAME = "sjbi.json";

    public AntMapping readMapping(final File projectDirectory, final SimpleAntContext context)
            throws SJBIException {
        final File f = new File(projectDirectory, FILENAME);
        if (!f.exists() || !f.isFile()) {
            return null;
        }

        FileReader in = null;
        try {
            in = new FileReader(f);

            final AntMapping mapping = newGson().fromJson(in, AntMapping.class);
            removeCommentedEntries(mapping);

            return mapping;
        } catch (final IOException e) {
            throw new SJBIException("Cannot read build-interface mappings from: %s. Reason: %s", e, FILENAME,
                    e.getMessage());
        } finally {
            closeQuietly(in);
        }
    }

    private void removeCommentedEntries(final AntMapping mapping) {
        if (isComment(mapping.getBuildFile())) {
            mapping.setBuildFile(null);
        }

        final Map<BuildPhase, String> phaseMap = mapping.getPhaseMappings();
        for (final Map.Entry<BuildPhase, String> entry : new HashMap<BuildPhase, String>(phaseMap).entrySet()) {
            if (isComment(entry.getValue())) {
                phaseMap.remove(entry.getKey());
            }
        }

        mapping.setPhaseMappings(phaseMap);

        final Collection<AntProjectMetadata> projects = mapping.getProjects();
        for (final AntProjectMetadata project : new ArrayList<AntProjectMetadata>(projects)) {
            boolean remove = false;
            if (isComment(project.getPom()) || isComment(project.getCoord())) {
                remove = true;
            } else {
                final Map<String, String> artifacts = project.getArtifacts();
                for (final Map.Entry<String, String> entry : new HashMap<String, String>(artifacts).entrySet()) {
                    if (isComment(entry.getKey()) || isComment(entry.getValue())) {
                        artifacts.remove(entry.getKey());
                    }
                }

                if (artifacts.isEmpty()) {
                    remove = true;
                }
            }

            if (remove) {
                projects.remove(project);
            }
        }

        mapping.setProjects(projects);
    }

    private boolean isComment(final String value) {
        return value != null && value.startsWith("//");
    }

    static Gson newGson() {
        return new GsonBuilder().create();
    }
}