/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-04 The eXist Project
*
* http://exist.sourceforge.net
*
* 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 program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xmldb;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.xmldb.api.base.CompiledExpression;
import org.exist.storage.DBBroker;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xmldb.api.DatabaseManager;
import org.xmldb.api.base.Collection;
import org.xmldb.api.base.Database;
import org.xmldb.api.base.ResourceSet;
import org.xmldb.api.modules.XMLResource;
import junit.framework.TestCase;
/**
* Tests the TreeLevelOrder function.
*
* @author Tobias Wunden
* @version 1.0
*/
public class TreeLevelOrderTest extends TestCase {
/** eXist database url */
static final String eXistUrl ="xmldb:exist://";
/** eXist configuration file */
static final String eXistConf = "conf.xml";
public static void main(String[] args) {
junit.textui.TestRunner.run(TreeLevelOrderTest.class);
}
static Method getTextContentMethod = null;
static {
try {
getTextContentMethod = Node.class.getMethod( "getTextContent", (Class[])null );
} catch (Exception ex) {
}
}
public static String textContent(Node n) {
if (getTextContentMethod!=null) {
try {
return (String)getTextContentMethod.invoke( n, (Object[])null );
} catch (IllegalArgumentException ex) {
ex.printStackTrace();
return null;
} catch (InvocationTargetException ex) {
ex.printStackTrace();
return null;
} catch (IllegalAccessException ex) {
ex.printStackTrace();
return null;
}
}
if (n.getNodeType()==Node.ELEMENT_NODE) {
StringBuffer builder = new StringBuffer();
Node current = n.getFirstChild();
while (current!=null) {
int type = current.getNodeType();
if (type==Node.CDATA_SECTION_NODE || type==Node.TEXT_NODE) {
builder.append(current.getNodeValue());
}
current = current.getNextSibling();
}
return builder.toString();
} else {
return n.getNodeValue();
}
}
/**
* Test for the TreeLevelOrder function. This test
* <ul>
* <li>Registers a database instance</li>
* <li>Writes a document to the database using the XQueryService</li>
* <li>Reads the document from the database using XmlDB</li>
* <li>Accesses the document using DOM</li>
* </ul>
*/
public final void testTreeLevelOrder()
{
Database eXist = null;
String document = "survey.xml";
XQueryService service = null;
try
{
eXist = registerDatabase();
assertNotNull(eXist);
// Obtain XQuery service
service = getXQueryService(eXist);
assertNotNull(service);
// create document
StringBuffer xmlDocument = new StringBuffer();
xmlDocument.append("<survey>");
xmlDocument.append("<date>2004/11/24 17:42:31 GMT</date>");
xmlDocument.append("<from><![CDATA[tobias.wunden@o2it.ch]]></from>");
xmlDocument.append("<to><![CDATA[tobias.wunden@o2it.ch]]></to>");
xmlDocument.append("<subject><![CDATA[Test]]></subject>");
xmlDocument.append("<field>");
xmlDocument.append("<name><![CDATA[homepage]]></name>");
xmlDocument.append("<value><![CDATA[-]]></value>");
xmlDocument.append("</field>");
xmlDocument.append("</survey>");
// write document to the database
store(xmlDocument.toString(), service, document);
// read document back from database
Node root = load(service, document);
assertNotNull(root);
//get node using DOM
String strTo = null;
NodeList rootChildren = root.getChildNodes();
for(int r=0; r < rootChildren.getLength(); r++)
{
if(rootChildren.item(r).getLocalName().equals("to"))
{
Node to = rootChildren.item(r);
//strTo = to.getTextContent();
strTo = textContent(to);
}
}
assertNotNull(strTo);
}
catch(Exception e)
{
fail(e.getMessage());
}
}
/**
* Stores the given xml fragment into the database.
*
* @param xml the xml document
* @param service the xquery service
* @param document the document name
*/
private final void store(String xml, XQueryService service, String document) {
try {
StringBuffer query = new StringBuffer();
query.append("xquery version \"1.0\";");
query.append("declare namespace xdb=\"http://exist-db.org/xquery/xmldb\";");
query.append("let $isLoggedIn := xdb:login('" + eXistUrl + DBBroker.ROOT_COLLECTION + "', 'admin', 'admin'),");
query.append("$doc := xdb:store(\"" + eXistUrl + DBBroker.ROOT_COLLECTION + "\", $document, $survey)");
query.append("return <result/>");
service.declareVariable("survey", xml);
service.declareVariable("document", document);
CompiledExpression cQuery = service.compile(query.toString());
service.execute(cQuery);
} catch (Exception e) {
fail(e.getMessage());
}
}
/**
* Loads the xml document identified by <code>document</code> from the database.
*
* @param service the xquery service
* @param document the document to load
*/
private final Node load(XQueryService service, String document) {
try {
StringBuffer query = new StringBuffer();
query.append("xquery version \"1.0\";");
query.append("let $survey := xmldb:document(concat('" + DBBroker.ROOT_COLLECTION + "', $document))");
query.append("return ($survey)");
service.declareVariable("document", document);
CompiledExpression cQuery = service.compile(query.toString());
ResourceSet set = service.execute(cQuery);
if (set != null && set.getSize() > 0) {
return ((XMLResource)set.getIterator().nextResource()).getContentAsDOM();
}
} catch (Exception e) {
fail(e.getMessage());
}
return null;
}
/**
* Registers a new database instance and returns it.
*/
private final Database registerDatabase() {
Class driver = null;
String driverName = "org.exist.xmldb.DatabaseImpl";
try {
driver = Class.forName(driverName);
Database database = (Database)driver.newInstance();
database.setProperty("create-database", "true");
// database.setProperty("configuration", eXistConf);
DatabaseManager.registerDatabase(database);
return database;
} catch (Exception e) {
fail(e.getMessage());
}
return null;
}
/**
* Retrieves the base collection and thereof returns a reference to the collection's
* xquery service.
*
* @param db the database
* @return the xquery service
*/
private final XQueryService getXQueryService(Database db) {
try {
Collection collection = DatabaseManager.getCollection(eXistUrl + DBBroker.ROOT_COLLECTION, "admin", "");
if (collection != null) {
XQueryService service = (XQueryService)collection.getService("XQueryService", "1.0");
collection.close();
return service;
}
} catch (Exception e) {
fail(e.getMessage());
}
return null;
}
}