alfresco-community-repo/source/java/org/alfresco/util/schemacomp/DbToXML.java

/*
 * Copyright (C) 2005-2011 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco 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.
 *
 * Alfresco 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 Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */
package org.alfresco.util.schemacomp;

import java.io.File;

import javax.xml.transform.stream.StreamResult;

import org.alfresco.util.schemacomp.model.Schema;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

/**
 * Tool to export a database schema to an XML file.
 * 
 * @author Matt Ward
 */
public class DbToXML
{
    private ApplicationContext context;
    private File outputFile;
    private String namePrefix = "alf_";
    
    /**
     * Constructor. Uses a default name prefix of 'alf_' during the export.
     */
    public DbToXML(ApplicationContext context, File outputFile)
    {
        this.context = context;
        this.outputFile = outputFile;
    }


    /**
     * Constructor. Allows specification of a name prefix, e.g. "jpbm_", that
     * will be used during the export.
     */
    public DbToXML(ApplicationContext context, File outputFile, String namePrefix)
    {
        this(context, outputFile);
        this.namePrefix = namePrefix;
    }
    
    
    public void execute()
    {
        ExportDb exporter = null;   
        try
        {
            exporter = new ExportDb(context);
            exporter.setNamePrefix(namePrefix);
            exporter.execute();
        }
        catch (Exception e)
        {
            System.err.println("Unable to read database schema.");
            e.printStackTrace();
            System.exit(1);
        }
        
        if (exporter != null)
        {
            Schema schema = exporter.getSchema();
            SchemaToXML schemaToXML = new SchemaToXML(schema, new StreamResult(outputFile));
            schemaToXML.execute();
        }
    }
    
    
    public static void main(String[] args)
    {
        if (args.length != 2)
        {
            System.err.println("Usage:");
            System.err.println("java " + DbToXML.class.getName() + " <context.xml> <output.xml>");
            System.exit(1);
        }
        String contextPath = args[0];
        File outputFile = new File(args[1]);
        
        // Create the Spring context
        FileSystemXmlApplicationContext context = new FileSystemXmlApplicationContext(contextPath);
        DbToXML dbToXML = new DbToXML(context, outputFile);
        
        dbToXML.execute();
        
        // Shutdown the Spring context
        context.close();
    }
}