| /* |
| * 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.shared.ldap.schema.comparators; |
| |
| |
| import java.util.Comparator; |
| |
| import org.apache.directory.shared.ldap.exception.LdapException; |
| import org.apache.directory.shared.ldap.schema.LdapComparator; |
| import org.apache.directory.shared.ldap.schema.Normalizer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A comparator which normalizes a value first before using a subordinate |
| * comparator to compare them. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| /* no qualifier*/class NormalizingComparator extends LdapComparator<String> |
| { |
| /** A logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( NormalizingComparator.class ); |
| |
| /** The serialVersionUID */ |
| private static final long serialVersionUID = 1L; |
| |
| /** the Normalizer to normalize values with before comparing */ |
| private Normalizer normalizer; |
| |
| /** the underlying comparator to use for comparisons */ |
| private LdapComparator<String> comparator; |
| |
| |
| /** |
| * A comparator which normalizes a value first before comparing them. |
| * |
| * @param normalizer the Normalizer to normalize values with before comparing |
| * @param comparator the underlying comparator to use for comparisons |
| */ |
| public NormalizingComparator( String oid, Normalizer normalizer, LdapComparator<String> comparator ) |
| { |
| super( oid ); |
| this.normalizer = normalizer; |
| this.comparator = comparator; |
| } |
| |
| |
| /** |
| * If any normalization attempt fails we compare using the unnormalized |
| * object. |
| * |
| * @see Comparator#compare(Object, Object) |
| */ |
| public int compare( String o1, String o2 ) |
| { |
| String n1; |
| String n2; |
| |
| try |
| { |
| n1 = normalizer.normalize( o1 ); |
| } |
| catch ( LdapException e ) |
| { |
| LOG.warn( "Failed to normalize: " + o1, e ); |
| n1 = o1; |
| } |
| |
| try |
| { |
| n2 = normalizer.normalize( o2 ); |
| } |
| catch ( LdapException e ) |
| { |
| LOG.warn( "Failed to normalize: " + o2, e ); |
| n2 = o2; |
| } |
| |
| return comparator.compare( n1, n2 ); |
| } |
| |
| |
| /** |
| * Makes sure we update the oid property of the contained normalizer and |
| * comparator. |
| * |
| * @param oid the object identifier |
| */ |
| @Override |
| public void setOid( String oid ) |
| { |
| super.setOid( oid ); |
| normalizer.setOid( oid ); |
| comparator.setOid( oid ); |
| } |
| } |