/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2010 The eXist Project
 *  http://exist-db.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 2
 *  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 library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *  $Id$
 */
package org.exist.ant;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;

import org.xmldb.api.base.XMLDBException;


/**
 * an ant task to list groups.
 *
 * @author  peter.klotz@blue-elephant-systems.com
 */
public class ListGroupsTask extends UserTask
{
    private String outputproperty = null;
    private String separator      = ",";

    /* (non-Javadoc)
     * @see org.apache.tools.ant.Task#execute()
     */
    public void execute() throws BuildException
    {
        super.execute();

        try {
            log( "Listing all groups", Project.MSG_DEBUG );
            final String[] groups = service.getGroups();

            if( groups != null ) {

                boolean       isFirst = true;
                final StringBuilder buffer  = new StringBuilder();

                for( final String group : groups ) {

                    // only insert separator for 2nd or later item
                    if( isFirst ) {
                        isFirst = false;
                    } else {
                        buffer.append( separator );
                    }

                    buffer.append( group );

                }

                if( buffer.length() > 0 ) {
                    log( "Setting output property " + outputproperty + " to " + buffer.toString(), Project.MSG_DEBUG );
                    getProject().setNewProperty( outputproperty, buffer.toString() );
                }
            }

        }
        catch( final XMLDBException e ) {
            final String msg = "XMLDB exception caught: " + e.getMessage();

            if( failonerror ) {
                throw( new BuildException( msg, e ) );
            } else {
                log( msg, e, Project.MSG_ERR );
            }
        }
    }


    public void setOutputproperty( String outputproperty )
    {
        this.outputproperty = outputproperty;
    }


    public void setSeparator( String separator )
    {
        this.separator = separator;
    }
}