de.fosd.jdime.strategy.ASTNodeStrategy.java Source code

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Here is the source code for de.fosd.jdime.strategy.ASTNodeStrategy.java

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/*
 * Copyright (C) 2013-2014 Olaf Lessenich
 * Copyright (C) 2014-2015 University of Passau, Germany
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301  USA
 *
 * Contributors:
 *     Olaf Lessenich <lessenic@fim.uni-passau.de>
 */
package de.fosd.jdime.strategy;

import java.io.IOException;

import org.apache.commons.lang3.ClassUtils;
import org.apache.log4j.Logger;

import de.fosd.jdime.common.ASTNodeArtifact;
import de.fosd.jdime.common.MergeContext;
import de.fosd.jdime.common.MergeTriple;
import de.fosd.jdime.common.NotYetImplementedException;
import de.fosd.jdime.common.operations.MergeOperation;
import de.fosd.jdime.merge.Merge;
import de.fosd.jdime.stats.Stats;

/**
 * @author Olaf Lessenich
 *
 */
public class ASTNodeStrategy extends MergeStrategy<ASTNodeArtifact> {

    private static final Logger LOG = Logger.getLogger(ClassUtils.getShortClassName(ASTNodeStrategy.class));
    /**
      *
      */
    private static Merge<ASTNodeArtifact> merge = null;

    /**
     * TODO: high-level documentation
     * @param operation
     * @param context
     *
     * @throws IOException
     * @throws InterruptedException
     */
    @Override
    public final void merge(final MergeOperation<ASTNodeArtifact> operation, final MergeContext context)
            throws IOException, InterruptedException {
        assert (operation != null);
        assert (context != null);

        MergeTriple<ASTNodeArtifact> triple = operation.getMergeTriple();

        assert (triple.isValid());

        ASTNodeArtifact left = triple.getLeft();
        ASTNodeArtifact base = triple.getBase();
        ASTNodeArtifact right = triple.getRight();
        ASTNodeArtifact target = operation.getTarget();

        ASTNodeArtifact[] revisions = { left, base, right };

        for (ASTNodeArtifact node : revisions) {
            assert (node.exists());
        }

        assert (target != null);

        if (merge == null) {
            merge = new Merge<>();
        }

        if (LOG.isTraceEnabled()) {
            LOG.trace("merge(operation, context)");
        }

        merge.merge(operation, context);
    }

    /*
     * (non-Javadoc)
     * 
     * @see de.fosd.jdime.strategy.MergeStrategy#toString()
     */
    @Override
    public final String toString() {
        return "astnode";
    }

    @Override
    public final Stats createStats() {
        return new Stats(new String[] { "nodes" });
    }

    @Override
    public final String getStatsKey(final ASTNodeArtifact artifact) {
        // FIXME: remove me when implementation is complete
        throw new NotYetImplementedException("ASTNodeStrategy: Implement me!");
    }

    @Override
    public final void dumpTree(final ASTNodeArtifact artifact, final boolean graphical) throws IOException {
        if (graphical) {
            dumpGraphVizTree(artifact);
        } else {
            System.out.println(artifact.dumpTree());
        }
    }

    /**
     * @param artifact
     *            artifact that should be printed
     */
    private void dumpGraphVizTree(final ASTNodeArtifact artifact) {
        StringBuilder sb = new StringBuilder();
        sb.append("digraph ast {").append(System.lineSeparator());
        sb.append("node [shape=ellipse];").append(System.lineSeparator());
        sb.append("nodesep=0.8;").append(System.lineSeparator());

        // nodes
        sb.append(artifact.dumpGraphvizTree(true));

        // footer
        sb.append("}");

        System.out.println(sb.toString());
    }

    @Override
    public void dumpFile(final ASTNodeArtifact artifact, final boolean graphical) throws IOException {
        System.out.println(artifact.prettyPrint());
    }
}