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.aci.ACIItemChecker;
025 import org.apache.directory.shared.ldap.constants.SchemaConstants;
026 import org.apache.directory.shared.ldap.schema.SyntaxChecker;
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 valid ACIItem.
034 *
035 *
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 * @version $Rev: 488616 $
038 */
039 public class ACIItemSyntaxChecker extends SyntaxChecker
040 {
041 /** A logger for this class */
042 private static final Logger LOG = LoggerFactory.getLogger( ACIItemSyntaxChecker.class );
043
044 /** The serialVersionUID */
045 private static final long serialVersionUID = 1L;
046
047 /** An instance of ACI Item Checker */
048 private static final ACIItemChecker ACI_ITEM_CHECKER = new ACIItemChecker();
049
050 /**
051 * Creates a new instance of ACIItemSyntaxChecker
052 */
053 public ACIItemSyntaxChecker()
054 {
055 super( SchemaConstants.ACI_ITEM_SYNTAX );
056 }
057
058
059 /**
060 * {@inheritDoc}
061 */
062 public boolean isValidSyntax( Object value )
063 {
064 String strValue = null;
065
066 if ( value == null )
067 {
068 LOG.debug( "Syntax invalid for '{}'", value );
069 return false;
070 }
071
072 if ( value instanceof String )
073 {
074 strValue = ( String ) value;
075 }
076 else if ( value instanceof byte[] )
077 {
078 strValue = StringTools.utf8ToString( ( byte[] ) value );
079 }
080 else
081 {
082 strValue = value.toString();
083 }
084
085 if ( strValue.length() == 0 )
086 {
087 LOG.debug( "Syntax invalid for '{}'", value );
088 return false;
089 }
090
091 try
092 {
093 synchronized( ACI_ITEM_CHECKER )
094 {
095 ACI_ITEM_CHECKER.parse( strValue );
096 }
097
098 LOG.debug( "Syntax valid for '{}'", value );
099 return true;
100 }
101 catch ( ParseException pe )
102 {
103 LOG.debug( "Syntax invalid for '{}'", value );
104 return false;
105 }
106 }
107 }