/*
 *  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.DatabaseManager;
import org.xmldb.api.base.Collection;
import org.xmldb.api.base.Resource;
import org.xmldb.api.base.XMLDBException;
import org.xmldb.api.modules.XUpdateQueryService;

/**
 * an ant task to update a collection or resource using XUpdate
 *
 * @author peter.klotz@blue-elephant-systems.com
 */
public class XMLDBXUpdateTask extends AbstractXMLDBTask {

    private String resource = null;
    private String commands = null;

    /* (non-Javadoc)
     * @see org.apache.tools.ant.Task#execute()
     */
    public void execute() throws BuildException {
        if (uri == null) {
            throw new BuildException("You have to specify an XMLDB collection URI");
        }

        log("XUpdate command is: " + commands, Project.MSG_DEBUG);
        registerDatabase();
        try {
            log("Get base collection: " + uri, Project.MSG_DEBUG);
            Collection base = DatabaseManager.getCollection(uri, user, password);

            if (base == null) {
                String msg = "Collection " + uri + " could not be found.";
                if (failonerror) {
                    throw new BuildException(msg);
                } else {
                    log(msg, Project.MSG_ERR);
                }

            } else {
                XUpdateQueryService service = (XUpdateQueryService) base.getService("XUpdateQueryService", "1.0");
                if (resource != null) {
                    log("Updating resource: " + resource, Project.MSG_INFO);
                    Resource res = base.getResource(resource);
                    if (res == null) {
                        String msg = "Resource " + resource + " not found.";
                        if (failonerror) {
                            throw new BuildException(msg);
                        } else {
                            log(msg, Project.MSG_ERR);
                        }
                    } else {
                        service.updateResource(resource, commands);
                    }

                } else {
                    log("Updating collection: " + base.getName(), Project.MSG_INFO);
                    service.update(commands);
                }
            }
            
        } catch (XMLDBException e) {
            String msg = "XMLDB exception during XUpdate: " + e.getMessage();
            if (failonerror) {
                throw new BuildException(msg, e);
            } else {
                log(msg, e, Project.MSG_ERR);
            }
        }
    }

    /**
     * @param resource
     */
    public void setResource(String resource) {
        this.resource = resource;
    }

    public void setCommands(String commands) {
        this.commands = commands;
    }
}