001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 *
019 */
020 package org.apache.directory.shared.ldap.schema.syntaxes;
021
022 import java.text.ParseException;
023
024 import org.apache.directory.shared.ldap.constants.SchemaConstants;
025 import org.apache.directory.shared.ldap.schema.AbstractSyntaxChecker;
026 import org.apache.directory.shared.ldap.subtree.SubtreeSpecificationChecker;
027 import org.apache.directory.shared.ldap.util.StringTools;
028
029
030 /**
031 * A SyntaxChecker which verifies that a value is a subtree specification.
032 *
033 * It has been removed in RFC 4517
034 *
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 * @version $Rev: 488616 $
037 */
038 public class SubtreeSpecificationSyntaxChecker extends AbstractSyntaxChecker
039 {
040 private SubtreeSpecificationChecker checker = new SubtreeSpecificationChecker();
041
042 /**
043 * Private default constructor to prevent unnecessary instantiation.
044 */
045 public SubtreeSpecificationSyntaxChecker()
046 {
047 super( SchemaConstants.SUBTREE_SPECIFICATION_SYNTAX );
048 }
049
050 /**
051 *
052 * Creates a new instance of SubtreeSpecificationSyntaxChecker.
053 *
054 * @param oid the oid to associate with this new SyntaxChecker
055 *
056 */
057 protected SubtreeSpecificationSyntaxChecker( String oid )
058 {
059 super( oid );
060 }
061
062 /**
063 * @see org.apache.directory.shared.ldap.schema.SyntaxChecker#isValidSyntax(Object)
064 *
065 * @param value the value of some attribute with the syntax
066 * @return true if the value is in the valid syntax, false otherwise
067 */
068 public boolean isValidSyntax( Object value )
069 {
070 String strValue = null;
071
072 if ( value == null )
073 {
074 return false;
075 }
076
077 if ( value instanceof String )
078 {
079 strValue = ( String ) value;
080 }
081 else if ( value instanceof byte[] )
082 {
083 strValue = StringTools.utf8ToString( ( byte[] ) value );
084 }
085 else
086 {
087 strValue = value.toString();
088 }
089
090 if ( strValue.length() == 0 )
091 {
092 return false;
093 }
094
095 try
096 {
097 synchronized( checker )
098 {
099 checker.parse( strValue );
100 }
101 return true;
102 }
103 catch ( ParseException pe )
104 {
105 return false;
106 }
107 }
108 }