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