/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2014-2016 ForgeRock AS.
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*/
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package org.opends.server.extensions;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.LinkedHashSet;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Set;
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import org.forgerock.i18n.LocalizableMessage;
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import org.forgerock.opendj.config.server.ConfigChangeResult;
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import org.forgerock.opendj.config.server.ConfigException;
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import org.forgerock.opendj.ldap.ByteString;
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import org.forgerock.opendj.ldap.DN;
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import org.forgerock.opendj.ldap.ResultCode;
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import org.forgerock.opendj.ldap.SearchScope;
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import org.forgerock.opendj.config.server.ConfigurationChangeListener;
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import org.forgerock.opendj.server.config.server.ExactMatchIdentityMapperCfg;
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import org.forgerock.opendj.server.config.server.IdentityMapperCfg;
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import org.opends.server.api.LocalBackend;
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import org.opends.server.api.IdentityMapper;
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import org.opends.server.core.BackendConfigManager;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.protocols.internal.InternalClientConnection;
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import org.opends.server.protocols.internal.InternalSearchOperation;
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import org.opends.server.protocols.internal.SearchRequest;
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import static org.opends.server.protocols.internal.Requests.*;
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import org.forgerock.opendj.ldap.schema.AttributeType;
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import org.opends.server.types.*;
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import static org.opends.messages.ExtensionMessages.*;
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import static org.opends.server.core.BackendConfigManager.NamingContextFilter.PUBLIC;
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import static org.opends.server.core.BackendConfigManager.NamingContextFilter.TOP_LEVEL;
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import static org.opends.server.protocols.internal.InternalClientConnection.*;
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import static org.opends.server.util.CollectionUtils.*;
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/**
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* This class provides an implementation of a Directory Server identity mapper
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* that looks for the exact value provided as the ID string to appear in an
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* attribute of a user's entry. This mapper may be configured to look in one or
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* more attributes using zero or more search bases. In order for the mapping to
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* be established properly, exactly one entry must have an attribute that
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* exactly matches (according to the equality matching rule associated with that
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* attribute) the ID value.
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*/
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public class ExactMatchIdentityMapper
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extends IdentityMapper<ExactMatchIdentityMapperCfg>
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implements ConfigurationChangeListener<
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ExactMatchIdentityMapperCfg>
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{
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/** The set of attribute types to use when performing lookups. */
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private AttributeType[] attributeTypes;
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/** The DN of the configuration entry for this identity mapper. */
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private DN configEntryDN;
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/** The current configuration for this identity mapper. */
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private ExactMatchIdentityMapperCfg currentConfig;
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/** The set of attributes to return in search result entries. */
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private LinkedHashSet<String> requestedAttributes;
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/**
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* Creates a new instance of this exact match identity mapper. All
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* initialization should be performed in the {@code initializeIdentityMapper}
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* method.
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*/
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public ExactMatchIdentityMapper()
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{
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super();
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// Don't do any initialization here.
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}
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@Override
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public void initializeIdentityMapper(
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ExactMatchIdentityMapperCfg configuration)
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throws ConfigException, InitializationException
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{
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configuration.addExactMatchChangeListener(this);
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currentConfig = configuration;
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configEntryDN = currentConfig.dn();
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// Get the attribute types to use for the searches. Ensure that they are
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// all indexed for equality.
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attributeTypes =
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currentConfig.getMatchAttribute().toArray(new AttributeType[0]);
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Set<DN> cfgBaseDNs = configuration.getMatchBaseDN();
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if (cfgBaseDNs == null || cfgBaseDNs.isEmpty())
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{
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cfgBaseDNs = DirectoryServer.getInstance().getServerContext().getBackendConfigManager()
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.getNamingContexts(PUBLIC, TOP_LEVEL);
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}
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BackendConfigManager backendConfigManager =
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DirectoryServer.getInstance().getServerContext().getBackendConfigManager();
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for (AttributeType t : attributeTypes)
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{
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for (DN baseDN : cfgBaseDNs)
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{
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LocalBackend<?> b = backendConfigManager.findLocalBackendForEntry(baseDN);
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if (b != null && ! b.isIndexed(t, IndexType.EQUALITY))
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{
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throw new ConfigException(ERR_EXACTMAP_ATTR_UNINDEXED.get(
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configuration.dn(), t.getNameOrOID(), b.getBackendID()));
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}
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}
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}
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// Create the attribute list to include in search requests. We want to
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// include all user and operational attributes.
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requestedAttributes = newLinkedHashSet("*", "+");
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}
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@Override
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public void finalizeIdentityMapper()
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{
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currentConfig.removeExactMatchChangeListener(this);
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}
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/**
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* Retrieves the user entry that was mapped to the provided identification
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* string.
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*
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* @param id The identification string that is to be mapped to a user.
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*
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* @return The user entry that was mapped to the provided identification, or
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* <CODE>null</CODE> if no users were found that could be mapped to
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* the provided ID.
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*
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* @throws DirectoryException If a problem occurs while attempting to map
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* the given ID to a user entry, or if there are
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* multiple user entries that could map to the
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* provided ID.
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*/
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@Override
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public Entry getEntryForID(String id)
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throws DirectoryException
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{
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ExactMatchIdentityMapperCfg config = currentConfig;
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AttributeType[] attributeTypes = this.attributeTypes;
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// Construct the search filter to use to make the determination.
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SearchFilter filter;
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if (attributeTypes.length == 1)
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{
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ByteString value = ByteString.valueOfUtf8(id);
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filter = SearchFilter.createEqualityFilter(attributeTypes[0], value);
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}
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else
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{
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ArrayList<SearchFilter> filterComps = new ArrayList<>(attributeTypes.length);
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for (AttributeType t : attributeTypes)
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{
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ByteString value = ByteString.valueOfUtf8(id);
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filterComps.add(SearchFilter.createEqualityFilter(t, value));
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}
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filter = SearchFilter.createORFilter(filterComps);
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}
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// Iterate through the set of search bases and process an internal search
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// to find any matching entries. Since we'll only allow a single match,
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// then use size and time limits to constrain costly searches resulting from
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// non-unique or inefficient criteria.
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Collection<DN> baseDNs = config.getMatchBaseDN();
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if (baseDNs == null || baseDNs.isEmpty())
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{
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baseDNs = DirectoryServer.getInstance().getServerContext().getBackendConfigManager()
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.getNamingContexts(PUBLIC, TOP_LEVEL);
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}
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SearchResultEntry matchingEntry = null;
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InternalClientConnection conn = getRootConnection();
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for (DN baseDN : baseDNs)
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{
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final SearchRequest request = newSearchRequest(baseDN, SearchScope.WHOLE_SUBTREE, filter)
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.setSizeLimit(1)
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.setTimeLimit(10)
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.addAttribute(requestedAttributes);
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InternalSearchOperation internalSearch = conn.processSearch(request);
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switch (internalSearch.getResultCode().asEnum())
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{
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case SUCCESS:
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// This is fine. No action needed.
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break;
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case NO_SUCH_OBJECT:
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// The search base doesn't exist. Not an ideal situation, but we'll
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// ignore it.
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break;
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case SIZE_LIMIT_EXCEEDED:
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// Multiple entries matched the filter. This is not acceptable.
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LocalizableMessage message = ERR_EXACTMAP_MULTIPLE_MATCHING_ENTRIES.get(id);
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throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, message);
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case TIME_LIMIT_EXCEEDED:
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case ADMIN_LIMIT_EXCEEDED:
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// The search criteria was too inefficient.
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message = ERR_EXACTMAP_INEFFICIENT_SEARCH.
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get(id, internalSearch.getErrorMessage());
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throw new DirectoryException(internalSearch.getResultCode(), message);
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default:
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// Just pass on the failure that was returned for this search.
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message = ERR_EXACTMAP_SEARCH_FAILED.
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get(id, internalSearch.getErrorMessage());
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throw new DirectoryException(internalSearch.getResultCode(), message);
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}
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LinkedList<SearchResultEntry> searchEntries = internalSearch.getSearchEntries();
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if (searchEntries != null && ! searchEntries.isEmpty())
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{
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if (matchingEntry == null)
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{
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Iterator<SearchResultEntry> iterator = searchEntries.iterator();
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matchingEntry = iterator.next();
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if (iterator.hasNext())
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{
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LocalizableMessage message = ERR_EXACTMAP_MULTIPLE_MATCHING_ENTRIES.get(id);
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throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, message);
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}
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}
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else
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{
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LocalizableMessage message = ERR_EXACTMAP_MULTIPLE_MATCHING_ENTRIES.get(id);
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throw new DirectoryException(ResultCode.CONSTRAINT_VIOLATION, message);
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}
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}
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}
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return matchingEntry;
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}
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@Override
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public boolean isConfigurationAcceptable(IdentityMapperCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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ExactMatchIdentityMapperCfg config =
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(ExactMatchIdentityMapperCfg) configuration;
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return isConfigurationChangeAcceptable(config, unacceptableReasons);
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}
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@Override
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public boolean isConfigurationChangeAcceptable(
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ExactMatchIdentityMapperCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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boolean configAcceptable = true;
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// Make sure that all of the configured attributes are indexed for equality
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// in all appropriate backends.
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Set<DN> cfgBaseDNs = configuration.getMatchBaseDN();
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BackendConfigManager backendConfigManager =
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DirectoryServer.getInstance().getServerContext().getBackendConfigManager();
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if (cfgBaseDNs == null || cfgBaseDNs.isEmpty())
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{
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cfgBaseDNs = backendConfigManager.getNamingContexts(PUBLIC, TOP_LEVEL);
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}
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for (AttributeType t : configuration.getMatchAttribute())
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{
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for (DN baseDN : cfgBaseDNs)
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{
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LocalBackend<?> b = backendConfigManager.findLocalBackendForEntry(baseDN);
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if (b != null && ! b.isIndexed(t, IndexType.EQUALITY))
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{
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unacceptableReasons.add(ERR_EXACTMAP_ATTR_UNINDEXED.get(
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configuration.dn(), t.getNameOrOID(), b.getBackendID()));
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configAcceptable = false;
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}
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}
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}
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return configAcceptable;
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}
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@Override
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public ConfigChangeResult applyConfigurationChange(
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ExactMatchIdentityMapperCfg configuration)
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{
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final ConfigChangeResult ccr = new ConfigChangeResult();
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attributeTypes =
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configuration.getMatchAttribute().toArray(new AttributeType[0]);
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currentConfig = configuration;
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return ccr;
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}
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}
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