GraphExecutable.java

/* 
 *
 * SchemaCrawler
 * http://sourceforge.net/projects/schemacrawler
 * Copyright (c) 2000-2012, Sualeh Fatehi.
 *
 * 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

package schemacrawler.tools.integration.graph;


import java.io.File;
import java.sql.Connection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import schemacrawler.schema.ColumnMap;
import schemacrawler.schema.Database;
import schemacrawler.schema.Schema;
import schemacrawler.schema.Table;
import schemacrawler.tools.analysis.associations.DatabaseWithAssociations;
import schemacrawler.tools.analysis.associations.SimpleWeakAssociationsCollector;
import schemacrawler.tools.executable.BaseExecutable;
import schemacrawler.tools.options.InfoLevel;
import sf.util.Utility;

/**
 * Main executor for the graphing integration.
 * 
 * @author Sualeh Fatehi
 */
public final class GraphExecutable
  extends BaseExecutable
{

  static final String COMMAND = "graph";

  public GraphExecutable()
  {
    super(COMMAND);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void executeOn(final Database db, final Connection connection)
    throws Exception
  {
    // Determine what decorators to apply to the database
    InfoLevel infoLevel;
    try
    {
      infoLevel = InfoLevel.valueOf(getSchemaCrawlerOptions()
        .getSchemaInfoLevel().getTag());
    }
    catch (final Exception e)
    {
      infoLevel = InfoLevel.unknown;
    }
    final Database database;
    if (infoLevel == InfoLevel.maximum)
    {
      database = new DatabaseWithAssociations(db);
    }
    else
    {
      database = db;
    }

    final List<Table> tables = new ArrayList<Table>();
    final Set<ColumnMap> weakAssociations = new HashSet<ColumnMap>();
    for (final Schema schema: database.getSchemas())
    {
      for (final Table table: schema.getTables())
      {
        tables.add(table);
        weakAssociations.addAll(Arrays.asList(SimpleWeakAssociationsCollector
          .getWeakAssociations(table)));
      }
    }

    // Create dot file
    final File dotFile = File.createTempFile("schemacrawler.", ".dot");
    final DotWriter dotWriter = new DotWriter(dotFile);
    dotWriter.open();
    dotWriter.print(database.getSchemaCrawlerInfo(),
                    database.getDatabaseInfo(),
                    database.getJdbcDriverInfo());
    dotWriter.print(tables, weakAssociations);
    dotWriter.close();

    // Create graph image
    final GraphGenerator dot = new GraphGenerator(dotFile,
                                                  outputOptions
                                                    .getOutputFormatValue(),
                                                  outputOptions.getOutputFile());
    try
    {
      dot.generateDiagram();
    }
    catch (final Exception e)
    {
      System.out.println(Utility.readResourceFully("/dot.error.txt"));
      throw e;
    }
  }

}