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.syntaxCheckers;
021
022 import java.text.ParseException;
023
024 import org.apache.directory.shared.ldap.constants.SchemaConstants;
025 import org.apache.directory.shared.ldap.schema.SyntaxChecker;
026 import org.apache.directory.shared.ldap.subtree.SubtreeSpecificationChecker;
027 import org.apache.directory.shared.ldap.util.StringTools;
028 import org.slf4j.Logger;
029 import org.slf4j.LoggerFactory;
030
031
032 /**
033 * A SyntaxChecker which verifies that a value is a subtree specification.
034 *
035 * It has been removed in RFC 4517
036 *
037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
038 * @version $Rev: 488616 $
039 */
040 public class SubtreeSpecificationSyntaxChecker extends SyntaxChecker
041 {
042 /** A logger for this class */
043 private static final Logger LOG = LoggerFactory.getLogger( SubtreeSpecificationSyntaxChecker.class );
044
045 /** The serialVersionUID */
046 private static final long serialVersionUID = 1L;
047
048 /** The associated checker */
049 private SubtreeSpecificationChecker checker = new SubtreeSpecificationChecker();
050
051 /**
052 * Creates an instance of SubtreeSpecificationSyntaxChecker
053 */
054 public SubtreeSpecificationSyntaxChecker()
055 {
056 super( SchemaConstants.SUBTREE_SPECIFICATION_SYNTAX );
057 }
058
059
060 /**
061 * {@inheritDoc}
062 */
063 public boolean isValidSyntax( Object value )
064 {
065 String strValue = null;
066
067 if ( value == null )
068 {
069 LOG.debug( "Syntax invalid for '{}'", value );
070 return false;
071 }
072
073 if ( value instanceof String )
074 {
075 strValue = ( String ) value;
076 }
077 else if ( value instanceof byte[] )
078 {
079 strValue = StringTools.utf8ToString( ( byte[] ) value );
080 }
081 else
082 {
083 strValue = value.toString();
084 }
085
086 if ( strValue.length() == 0 )
087 {
088 LOG.debug( "Syntax invalid for '{}'", value );
089 return false;
090 }
091
092 try
093 {
094 synchronized( checker )
095 {
096 checker.parse( strValue );
097 }
098
099 LOG.debug( "Syntax valid for '{}'", value );
100 return true;
101 }
102 catch ( ParseException pe )
103 {
104 LOG.debug( "Syntax invalid for '{}'", value );
105 return false;
106 }
107 }
108 }