| /* |
| * 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 |
| * |
| * https://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.api.ldap.model.schema.comparators; |
| |
| |
| import org.apache.directory.api.i18n.I18n; |
| import org.apache.directory.api.ldap.model.schema.LdapComparator; |
| import org.apache.directory.api.util.Strings; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * <p> |
| * A comparator for Words/KeyWords. RFC 4517 par. 4.2.21 (KeywordMatch) and par. |
| * 4.2.32 is pretty vague about the definition of what is a word or a keyword |
| * ("...The precise definition of a word is implementation specific...) |
| * ("...The identification of keywords in the attribute value and the exactness |
| * of the match are both implementation specific...). |
| * <p> |
| * We will simply check that the assertion is present in the value at some place, |
| * after having deep trimmed the word. |
| * <p> |
| * For instance, the word " World " will be found in the value "Hello world!". |
| * <p> |
| * A word is defined by the following regexp : "(^|[^A-Za-z0-9])([A-Za-z0-9])*([^A-Za-z0-9]|$)". |
| * Anything that is not matched by this regexp will not be considered as a word. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class WordComparator extends LdapComparator<String> |
| { |
| /** The serial version UID */ |
| private static final long serialVersionUID = 2L; |
| |
| /** A logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( WordComparator.class ); |
| |
| |
| /** |
| * The StringComparator constructor. Its OID is the StringMatch matching |
| * rule OID. |
| * |
| * @param oid The Comparator's OID |
| */ |
| public WordComparator( String oid ) |
| { |
| super( oid ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int compare( String value, String assertion ) |
| { |
| if ( LOG.isDebugEnabled() ) |
| { |
| LOG.debug( I18n.msg( I18n.MSG_13749_COMPARING_STRING, value, assertion ) ); |
| } |
| |
| if ( value == assertion ) |
| { |
| return 0; |
| } |
| |
| // ------------------------------------------------------------------- |
| // Handle some basis cases |
| // ------------------------------------------------------------------- |
| if ( ( value == null ) || ( assertion == null ) ) |
| { |
| return ( assertion == null ) ? 1 : -1; |
| } |
| |
| // Now, trim the assertion and find it in the value |
| String trimmedAssertion = Strings.trim( assertion ); |
| int pos = value.indexOf( trimmedAssertion ); |
| |
| if ( pos != -1 ) |
| { |
| int assertionLength = trimmedAssertion.length(); |
| |
| // Check that we are not in a middle of some text |
| if ( assertionLength == value.length() ) |
| { |
| return 0; |
| } |
| |
| if ( pos == 0 ) |
| { |
| char after = value.charAt( assertionLength ); |
| |
| if ( !Character.isLetterOrDigit( after ) ) |
| { |
| return 0; |
| } |
| else |
| { |
| return -1; |
| } |
| } |
| |
| if ( pos + assertionLength == value.length() ) |
| { |
| char before = value.charAt( value.length() - assertionLength - 1 ); |
| |
| if ( !Character.isLetterOrDigit( before ) ) |
| { |
| return 0; |
| } |
| else |
| { |
| return -1; |
| } |
| } |
| |
| char before = value.charAt( value.length() - assertionLength ); |
| char after = value.charAt( assertionLength ); |
| |
| if ( Character.isLetterOrDigit( after ) ) |
| { |
| return -1; |
| } |
| |
| if ( !Character.isLetterOrDigit( before ) ) |
| { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| return -1; |
| } |
| } |