| /* |
| * 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.api.ldap.model.schema.comparators; |
| |
| |
| import org.apache.directory.api.asn1.util.Oid; |
| import org.apache.directory.api.ldap.model.schema.LdapComparator; |
| import org.apache.directory.api.util.Chars; |
| import org.apache.directory.api.util.Strings; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A comparator for Comparators. We compare the OIDs |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class ObjectIdentifierFirstComponentComparator 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( ObjectIdentifierFirstComponentComparator.class ); |
| |
| |
| /** |
| * The ObjectIdentifierFirstComponentComparator constructor. Its OID is the |
| * ObjectIdentifierFirstComponentMatch matching rule OID. |
| */ |
| public ObjectIdentifierFirstComponentComparator( String oid ) |
| { |
| super( oid ); |
| } |
| |
| |
| /** |
| * Get the OID from the SchemaObject description |
| */ |
| private String getNumericOid( String s ) |
| { |
| // Get the OID from the strings now |
| int pos = 0; |
| |
| if ( !Strings.isCharASCII( s, pos++, '(' ) ) |
| { |
| return null; |
| } |
| |
| while ( Strings.isCharASCII( s, pos, ' ' ) ) |
| { |
| pos++; |
| } |
| |
| int start = pos; |
| |
| while ( Chars.isDigit( s, pos ) || Strings.isCharASCII( s, pos, '.' ) ) |
| { |
| pos++; |
| } |
| |
| String numericOid = s.substring( start, pos ); |
| |
| if ( Oid.isOid( numericOid ) ) |
| { |
| return numericOid; |
| } |
| else |
| { |
| return null; |
| } |
| } |
| |
| |
| /** |
| * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object) |
| */ |
| public int compare( String s1, String s2 ) |
| { |
| LOG.debug( "comparing ObjectIdentifierFirstComponent objects '{}' with '{}'", s1, s2 ); |
| |
| // ------------------------------------------------------------------- |
| // Handle some basis cases |
| // ------------------------------------------------------------------- |
| if ( s1 == null ) |
| { |
| return ( s2 == null ) ? 0 : -1; |
| } |
| |
| if ( s2 == null ) |
| { |
| return -1; |
| } |
| |
| // Let's try to avoid a parse. |
| if ( s1.equals( s2 ) ) |
| { |
| return 0; |
| } |
| |
| // Get the OID from the strings now |
| String oid1 = getNumericOid( s1 ); |
| |
| if ( oid1 == null ) |
| { |
| return -1; |
| } |
| |
| String oid2 = getNumericOid( s2 ); |
| |
| if ( oid2 == null ) |
| { |
| return -1; |
| } |
| |
| if ( oid1.equals( oid2 ) ) |
| { |
| return 0; |
| } |
| else |
| { |
| return -1; |
| } |
| } |
| } |