/* * 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 org.exist.EXistException; 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.Node; import java.util.Map; /** * Implements an XUpdate remove operation. * * @author Wolfgang Meier */ public class Remove extends Modification { /** * Constructor for Remove. * * * @param broker * @param docs * @param namespaces * @param variables * @param selectStmt */ public Remove(DBBroker broker, DocumentSet docs, String selectStmt, Map namespaces, Map variables) { super(broker, docs, selectStmt, namespaces, variables); } /** * @see org.exist.xupdate.Modification#process(org.exist.storage.txn.Txn) */ public long process(Txn transaction) throws PermissionDeniedException, LockException, EXistException, XPathException { try { StoredNode[] ql = selectAndLock(transaction); IndexListener listener = new IndexListener(ql); NotificationService notifier = broker.getBrokerPool() .getNotificationService(); NodeImpl parent; for (int i = 0; i < ql.length; i++) { StoredNode node = ql[i]; DocumentImpl doc = (DocumentImpl)node.getOwnerDocument(); if (!doc.getPermissions().validate(broker.getUser(), Permission.UPDATE)) throw new PermissionDeniedException( "permission to update document denied"); doc.getMetadata().setIndexListener(listener); parent = (NodeImpl) node.getParentNode(); if (parent == null || parent.getNodeType() != Node.ELEMENT_NODE) { throw new EXistException( "you cannot remove the document element. Use update " + "instead"); } else parent.removeChild(transaction, node); 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 "remove"; } }