/*
* eXist Open Source Native XML Database Copyright (C) 2001-04 Wolfgang M. Meier
* wolfgang@exist-db.org 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.xupdate;
import java.util.Map;
import org.exist.EXistException;
import org.exist.collections.triggers.TriggerException;
import org.exist.dom.DocumentImpl;
import org.exist.dom.DocumentSet;
import org.exist.dom.NodeImpl;
import org.exist.dom.StoredNode;
import org.exist.security.Permission;
import org.exist.security.PermissionDeniedException;
import org.exist.storage.DBBroker;
import org.exist.storage.NotificationService;
import org.exist.storage.UpdateListener;
import org.exist.storage.txn.Txn;
import org.exist.util.LockException;
import org.exist.xquery.XPathException;
import org.w3c.dom.NodeList;
/**
* Implements an XUpdate insert-after or insert-before modification.
*
* @author Wolfgang Meier
*/
public class Insert extends Modification {
public final static int INSERT_BEFORE = 0;
public final static int INSERT_AFTER = 1;
private int mode = INSERT_BEFORE;
/**
* Constructor for Insert.
*
*
* @param broker
* @param docs
* @param namespaces
* @param variables
* @param selectStmt
*/
public Insert(DBBroker broker, DocumentSet docs, String selectStmt,
Map<String, String> namespaces, Map<String, Object> variables) {
super(broker, docs, selectStmt, namespaces, variables);
}
public Insert(DBBroker broker, DocumentSet docs, String selectStmt,
int mode, Map<String, String> namespaces, Map<String, Object> variables) {
this(broker, docs, selectStmt, namespaces, variables);
this.mode = mode;
}
/**
* @see org.exist.xupdate.Modification#process(org.exist.storage.txn.Txn)
*/
public long process(Txn transaction) throws PermissionDeniedException, LockException,
EXistException, XPathException, TriggerException {
final NodeList children = content;
if (children.getLength() == 0) {return 0;}
try {
final StoredNode[] ql = selectAndLock(transaction);
final IndexListener listener = new IndexListener(ql);
final NotificationService notifier = broker.getBrokerPool().getNotificationService();
NodeImpl parent;
final int len = children.getLength();
if (LOG.isDebugEnabled())
{LOG.debug("found " + len + " nodes to insert");}
for (int i = 0; i < ql.length; i++) {
final StoredNode node = ql[i];
final DocumentImpl doc = (DocumentImpl)node.getOwnerDocument();
doc.getMetadata().setIndexListener(listener);
if (!doc.getPermissions().validate(broker.getSubject(), Permission.WRITE)) {
throw new PermissionDeniedException("permission to update document denied");
}
parent = (NodeImpl) node.getParentNode();
switch (mode) {
case INSERT_BEFORE:
parent.insertBefore(transaction, children, node);
break;
case INSERT_AFTER:
parent.insertAfter(transaction, children, node);
break;
}
doc.getMetadata().clearIndexListener();
doc.getMetadata().setLastModified(System.currentTimeMillis());
modifiedDocuments.add(doc);
broker.storeXMLResource(transaction, doc);
notifier.notifyUpdate(doc, UpdateListener.UPDATE);
}
checkFragmentation(transaction, modifiedDocuments);
return ql.length;
} finally {
unlockDocuments(transaction);
}
}
/**
* @see org.exist.xupdate.Modification#getName()
*/
public String getName() {
return (mode == INSERT_BEFORE ? "insert-before" : "insert-after");
}
}