/*
* 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.apache.tools.ant.taskdefs.condition.Condition;
import org.xmldb.api.DatabaseManager;
import org.xmldb.api.base.Collection;
import org.xmldb.api.base.Resource;
import org.xmldb.api.base.XMLDBException;
/**
* an ant task to check for the existance of a collection or resource
* to be used as a ant condition
*
* @author peter.klotz@blue-elephant-systems.com
*/
public class XMLDBExistTask extends AbstractXMLDBTask implements Condition {
private String resource = null;
/**
* @return returns true if the eval is successful.
* @throws BuildException
* @see org.apache.tools.ant.taskdefs.condition.Condition#eval()
*/
public boolean eval() throws BuildException {
boolean exist = false;
if (uri == null) {
throw new BuildException("You have to specify an XMLDB collection URI");
}
registerDatabase();
try {
log("Checking collection: " + uri, Project.MSG_INFO);
Collection base = DatabaseManager.getCollection(uri, user, password);
if (base != null) {
log("Base collection found", Project.MSG_DEBUG);
exist = true;
}
if (base != null && resource != null) {
log("Checking resource: " + resource, Project.MSG_INFO);
Resource res = base.getResource(resource);
if (res == null) {
log("Resource not found", Project.MSG_DEBUG);
exist = false;
}
}
} catch (XMLDBException e) {
// ignore is false already
log("Resource or collection cannot be retrieved", Project.MSG_DEBUG);
exist = false;
}
return exist;
}
/**
* @param resource
*/
public void setResource(String resource) {
this.resource = resource;
}
}