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 */ 020package org.apache.directory.shared.ldap.model.schema.syntaxCheckers; 021 022 023import org.apache.directory.shared.ldap.model.constants.SchemaConstants; 024import org.apache.directory.shared.ldap.model.schema.SyntaxChecker; 025import org.apache.directory.shared.util.Strings; 026import org.slf4j.Logger; 027import 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 */ 040@SuppressWarnings("serial") 041public class BooleanSyntaxChecker extends SyntaxChecker 042{ 043 /** A logger for this class */ 044 private static final Logger LOG = LoggerFactory.getLogger( BooleanSyntaxChecker.class ); 045 046 /** 047 * Creates a new instance of BooleanSyntaxChecker. 048 */ 049 public BooleanSyntaxChecker() 050 { 051 super( SchemaConstants.BOOLEAN_SYNTAX ); 052 } 053 054 055 /** 056 * {@inheritDoc} 057 */ 058 public boolean isValidSyntax( Object value ) 059 { 060 String strValue = null; 061 062 if ( value == null ) 063 { 064 LOG.debug( "Syntax invalid for 'null'" ); 065 return false; 066 } 067 068 if ( value instanceof String ) 069 { 070 strValue = ( String ) value; 071 } 072 else if ( value instanceof byte[] ) 073 { 074 strValue = Strings.utf8ToString((byte[]) value); 075 } 076 else 077 { 078 strValue = value.toString(); 079 } 080 081 if ( strValue.length() == 0 ) 082 { 083 LOG.debug( "Syntax invalid for '{}'", strValue ); 084 return false; 085 } 086 087 boolean valid = ( ( "TRUE".equalsIgnoreCase( strValue ) ) || ( "FALSE".equalsIgnoreCase( strValue ) ) ); 088 089 if ( valid ) 090 { 091 LOG.debug( "Syntax valid for '{}'", strValue ); 092 } 093 else 094 { 095 LOG.debug( "Syntax invalid for '{}'", strValue ); 096 } 097 098 return valid; 099 } 100}