| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.api.ldap.model.schema.syntaxCheckers; |
| |
| |
| import org.apache.directory.api.ldap.model.constants.SchemaConstants; |
| import org.apache.directory.api.ldap.model.schema.SyntaxChecker; |
| import org.apache.directory.api.util.Chars; |
| import org.apache.directory.api.util.Strings; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A SyntaxChecker which verifies that a value is a Boolean according to RFC 4517. |
| * |
| * From RFC 4512 & RFC 4517 : |
| * |
| * BitString = SQUOTE *binary-digit SQUOTE "B" |
| * binary-digit = "0" / "1" |
| * SQUOTE = %x27 ; hyphen ("'") |
| * |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| @SuppressWarnings("serial") |
| public class BitStringSyntaxChecker extends SyntaxChecker |
| { |
| /** A logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( BitStringSyntaxChecker.class ); |
| |
| |
| /** |
| * |
| * Creates a new instance of BitStringSyntaxChecker. |
| * |
| */ |
| public BitStringSyntaxChecker() |
| { |
| super( SchemaConstants.BIT_STRING_SYNTAX ); |
| } |
| |
| |
| /** |
| * A shared and static method used to check that the string is a BitString. |
| * A BitString is a string of bits, between quotes and followed by a 'B' : |
| * |
| * '01010110'B for instance |
| * |
| * @param strValue The string to check |
| * @return <code>true</code> if the string is a BitString |
| */ |
| public static boolean isValid( String strValue ) |
| { |
| if ( strValue.length() == 0 ) |
| { |
| LOG.debug( "Syntax invalid for '{}'", strValue ); |
| return false; |
| } |
| |
| int pos = 0; |
| |
| // Check that the String respect the syntax : ' ([01]+) ' B |
| if ( !Strings.isCharASCII( strValue, pos++, '\'' ) ) |
| { |
| LOG.debug( "Syntax invalid for '{}'", strValue ); |
| return false; |
| } |
| |
| // We must have at least one bit |
| if ( !Chars.isBit( strValue, pos++ ) ) |
| { |
| LOG.debug( "Syntax invalid for '{}'", strValue ); |
| return false; |
| } |
| |
| while ( Chars.isBit( strValue, pos ) ) |
| { |
| // Loop until we get a char which is not a 0 or a 1 |
| pos++; |
| } |
| |
| // Now, we must have a simple quote |
| if ( !Strings.isCharASCII( strValue, pos++, '\'' ) ) |
| { |
| LOG.debug( "Syntax invalid for '{}'", strValue ); |
| return false; |
| } |
| |
| // followed by a 'B' |
| if ( !Strings.isCharASCII( strValue, pos, 'B' ) ) |
| { |
| LOG.debug( "Syntax invalid for '{}'", strValue ); |
| return false; |
| } |
| |
| LOG.debug( "Syntax valid for '{}'", strValue ); |
| return true; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean isValidSyntax( Object value ) |
| { |
| String strValue = null; |
| |
| if ( value == null ) |
| { |
| LOG.debug( "Syntax invalid for 'null'" ); |
| return false; |
| } |
| |
| if ( value instanceof String ) |
| { |
| strValue = ( String ) value; |
| } |
| else if ( value instanceof byte[] ) |
| { |
| strValue = Strings.utf8ToString( ( byte[] ) value ); |
| } |
| else |
| { |
| strValue = value.toString(); |
| } |
| |
| return isValid( strValue ); |
| } |
| } |