/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2008 Sun Microsystems, Inc.
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*/
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package org.opends.guitools.controlpanel.util;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Set;
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import javax.naming.NamingEnumeration;
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import javax.naming.directory.SearchControls;
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import javax.naming.directory.SearchResult;
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import javax.naming.ldap.InitialLdapContext;
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import org.opends.guitools.controlpanel.datamodel.CustomSearchResult;
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import org.opends.guitools.controlpanel.event.EntryReadErrorEvent;
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import org.opends.guitools.controlpanel.event.EntryReadEvent;
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import org.opends.guitools.controlpanel.event.EntryReadListener;
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import org.opends.server.types.AttributeType;
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import org.opends.server.types.Schema;
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/**
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* A class that reads an entry on the background. This is used in the LDAP
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* entries browser. When the entry is read it notifies to the EntryReadListener
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* objects that have been registered.
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*
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*/
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public class LDAPEntryReader extends BackgroundTask<CustomSearchResult>
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{
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private String dn;
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private InitialLdapContext ctx;
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private Schema schema;
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private Set<EntryReadListener> listeners = new HashSet<EntryReadListener>();
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private boolean isOver;
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/**
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* Constructor of the entry reader.
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* @param dn the DN of the entry.
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* @param ctx the connection to the server.
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* @param schema the schema of the server.
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*/
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public LDAPEntryReader(String dn, InitialLdapContext ctx, Schema schema)
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{
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this.dn = dn;
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this.ctx = ctx;
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this.schema = schema;
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}
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/**
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* {@inheritDoc}
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*/
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public CustomSearchResult processBackgroundTask() throws Throwable
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{
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isOver = false;
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try
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{
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SearchControls controls = new SearchControls();
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controls.setCountLimit(1);
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Set<String> operational = getAllOperationalAttributes();
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String[] attrs = new String[operational.size()+1];
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Iterator<String> it = operational.iterator();
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int i = 0;
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while (it.hasNext())
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{
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attrs[i] = it.next();
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i++;
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}
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attrs[attrs.length - 1] = "*";
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controls.setReturningAttributes(attrs);
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controls.setSearchScope(SearchControls.OBJECT_SCOPE);
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final String filter = "(|(objectclass=*)(objectclass=ldapsubentry))";
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NamingEnumeration en = ctx.search(Utilities.getJNDIName(dn), filter,
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controls);
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SearchResult sr = (SearchResult)en.next();
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return new CustomSearchResult(sr, dn);
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}
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finally
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{
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if (isInterrupted())
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{
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isOver = true;
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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public void backgroundTaskCompleted(CustomSearchResult sr,
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Throwable throwable)
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{
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if (!isInterrupted())
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{
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if (throwable == null)
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{
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notifyListeners(sr);
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}
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else
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{
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notifyListeners(throwable);
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}
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}
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isOver = true;
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}
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/**
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* Returns <CODE>true</CODE> if the read process is over and
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* <CODE>false</CODE> otherwise.
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* @return <CODE>true</CODE> if the read process is over and
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* <CODE>false</CODE> otherwise.
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*/
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public boolean isOver()
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{
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return isOver;
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}
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/**
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* Notifies listeners that a new entry was read.
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* @param sr the new entry in form of CustomSearchResult.
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*/
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private void notifyListeners(CustomSearchResult sr)
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{
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EntryReadEvent ev = new EntryReadEvent(this, sr);
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for (EntryReadListener listener : listeners)
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{
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listener.entryRead(ev);
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}
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}
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/**
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* Notifies the listeners that an error occurred reading an entry.
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* @param t the error that occurred reading an entry.
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*/
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private void notifyListeners(Throwable t)
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{
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EntryReadErrorEvent ev = new EntryReadErrorEvent(this, dn, t);
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for (EntryReadListener listener : listeners)
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{
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listener.entryReadError(ev);
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}
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}
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/**
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* Adds an EntryReadListener.
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* @param listener the listener.
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*/
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public void addEntryReadListener(EntryReadListener listener)
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{
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listeners.add(listener);
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}
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/**
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* Removes an EntryReadListener.
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* @param listener the listener.
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*/
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public void removeEntryReadListener(EntryReadListener listener)
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{
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listeners.remove(listener);
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}
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private Set<String> getAllOperationalAttributes()
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{
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HashSet<String> attrs = new HashSet<String>();
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// Do a best effort if schema could not be retrieved when creating
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// this object.
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if (schema != null)
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{
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for (AttributeType attr : schema.getAttributeTypes().values())
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{
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if (attr.isOperational())
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{
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attrs.add(attr.getNameOrOID());
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}
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}
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}
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return attrs;
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}
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}
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