| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.server.core.enumeration; |
| |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| |
| import javax.naming.NamingEnumeration; |
| import javax.naming.NamingException; |
| import javax.naming.directory.SearchControls; |
| |
| import org.apache.directory.server.core.entry.ServerSearchResult; |
| import org.apache.directory.server.core.interceptor.context.LookupOperationContext; |
| import org.apache.directory.server.core.partition.PartitionNexus; |
| import org.apache.directory.server.core.referral.ReferralLut; |
| import org.apache.directory.server.schema.registries.Registries; |
| import org.apache.directory.shared.ldap.codec.util.LdapURL; |
| import org.apache.directory.shared.ldap.codec.util.LdapURLEncodingException; |
| import org.apache.directory.shared.ldap.constants.SchemaConstants; |
| import org.apache.directory.shared.ldap.entry.EntryAttribute; |
| import org.apache.directory.shared.ldap.entry.Value; |
| import org.apache.directory.shared.ldap.exception.LdapReferralException; |
| import org.apache.directory.shared.ldap.name.LdapDN; |
| import org.apache.directory.shared.ldap.schema.OidNormalizer; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A wrapper enumeration which saves referral entries to be returned last. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$ |
| */ |
| public class ReferralHandlingEnumeration implements NamingEnumeration<ServerSearchResult> |
| { |
| private final Logger log = LoggerFactory.getLogger( ReferralHandlingEnumeration.class ); |
| private final List<ServerSearchResult> referrals = new ArrayList<ServerSearchResult>(); |
| private final NamingEnumeration<ServerSearchResult> underlying; |
| private final ReferralLut lut; |
| private final PartitionNexus nexus; |
| private final boolean doThrow; |
| private final int scope; |
| private ServerSearchResult prefetched; |
| private int refIndex = -1; |
| |
| /** |
| * The OIDs normalizer map |
| */ |
| private Map<String, OidNormalizer> normalizerMap; |
| |
| /** The global registries */ |
| private Registries registries; |
| |
| public ReferralHandlingEnumeration( |
| NamingEnumeration<ServerSearchResult> underlying, |
| ReferralLut lut, |
| Registries registries, |
| PartitionNexus nexus, |
| int scope, |
| boolean doThrow ) throws NamingException |
| { |
| normalizerMap = registries.getAttributeTypeRegistry().getNormalizerMapping(); |
| this.underlying = underlying; |
| this.doThrow = doThrow; |
| this.lut = lut; |
| this.scope = scope; |
| this.nexus = nexus; |
| this.registries = registries; |
| prefetch(); |
| } |
| |
| |
| public void prefetch() throws NamingException |
| { |
| while ( underlying.hasMore() ) |
| { |
| ServerSearchResult result = underlying.next(); |
| LdapDN dn = new LdapDN( result.getDn() ); |
| dn.normalize( normalizerMap ); |
| |
| if ( lut.isReferral( dn ) ) |
| { |
| referrals.add( result ); |
| continue; |
| } |
| |
| prefetched = result; |
| return; |
| } |
| |
| refIndex++; |
| prefetched = referrals.get( refIndex ); |
| if ( doThrow ) |
| { |
| doReferralExceptionOnSearchBase( registries ); |
| } |
| } |
| |
| |
| public ServerSearchResult next() throws NamingException |
| { |
| ServerSearchResult retval = prefetched; |
| prefetch(); |
| return retval; |
| } |
| |
| |
| public boolean hasMore() throws NamingException |
| { |
| return underlying.hasMore() || refIndex < referrals.size(); |
| } |
| |
| |
| public void close() throws NamingException |
| { |
| underlying.close(); |
| referrals.clear(); |
| prefetched = null; |
| refIndex = Integer.MAX_VALUE; |
| } |
| |
| |
| public boolean hasMoreElements() |
| { |
| try |
| { |
| return hasMore(); |
| } |
| catch ( NamingException e ) |
| { |
| log.error( "Naming enumeration failure. Closing enumeration early!", e ); |
| try |
| { |
| close(); |
| } |
| catch ( NamingException e1 ) |
| { |
| log.error( "Naming enumeration failure. Failed to properly close enumeration!", e1 ); |
| } |
| } |
| |
| return false; |
| } |
| |
| |
| public ServerSearchResult nextElement() |
| { |
| try |
| { |
| return next(); |
| } |
| catch ( NamingException e ) |
| { |
| log.error( "NamingEnumeration closed prematurely without returning elements.", e ); |
| } |
| |
| throw new NoSuchElementException( "NamingEnumeration closed prematurely without returning elements." ); |
| } |
| |
| |
| public void doReferralExceptionOnSearchBase( Registries registries ) throws NamingException |
| { |
| // the refs attribute may be filtered out so we might need to lookup the entry |
| EntryAttribute refs = prefetched.getServerEntry().get( SchemaConstants.REF_AT ); |
| |
| if ( refs == null ) |
| { |
| LdapDN prefetchedDn = new LdapDN( prefetched.getDn() ); |
| prefetchedDn.normalize( normalizerMap ); |
| refs = nexus.lookup( new LookupOperationContext( registries, prefetchedDn ) ).get( SchemaConstants.REF_AT ); |
| } |
| |
| if ( refs == null ) |
| { |
| throw new IllegalStateException( prefetched.getDn() |
| + " does not seem like a referral but we're trying to handle it as one." ); |
| } |
| |
| List<String> list = new ArrayList<String>( refs.size() ); |
| |
| for ( Value<?> value:refs ) |
| { |
| String val = (String)value.get(); |
| |
| // need to add non-ldap URLs as-is |
| if ( !val.startsWith( "ldap" ) ) |
| { |
| list.add( val ); |
| continue; |
| } |
| |
| // parse the ref value and normalize the DN according to schema |
| LdapURL ldapUrl = new LdapURL(); |
| try |
| { |
| ldapUrl.parse( val.toCharArray() ); |
| } |
| catch ( LdapURLEncodingException e ) |
| { |
| log |
| .error( "Bad URL (" + val + ") for ref in " + prefetched.getDn() |
| + ". Reference will be ignored." ); |
| } |
| |
| StringBuilder buf = new StringBuilder(); |
| buf.append( ldapUrl.getScheme() ); |
| buf.append( ldapUrl.getHost() ); |
| |
| if ( ldapUrl.getPort() > 0 ) |
| { |
| buf.append( ":" ); |
| buf.append( ldapUrl.getPort() ); |
| } |
| |
| buf.append( "/" ); |
| buf.append( ldapUrl.getDn() ); |
| buf.append( "??" ); |
| |
| switch ( scope ) |
| { |
| case ( SearchControls.SUBTREE_SCOPE ): |
| buf.append( "sub" ); |
| break; |
| |
| // if we search for one level and encounter a referral then search |
| // must be continued at that node using base level search scope |
| case ( SearchControls.ONELEVEL_SCOPE ): |
| buf.append( "base" ); |
| break; |
| |
| case ( SearchControls.OBJECT_SCOPE ): |
| buf.append( "base" ); |
| break; |
| |
| default: |
| throw new IllegalStateException( "Unknown recognized search scope: " + scope ); |
| } |
| |
| list.add( buf.toString() ); |
| } |
| |
| LdapReferralException lre = new LdapReferralException( list ); |
| throw lre; |
| } |
| } |