| /* |
| * 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 java.util.regex.Pattern; |
| |
| import org.apache.directory.api.ldap.model.constants.SchemaConstants; |
| import org.apache.directory.api.ldap.model.schema.SyntaxChecker; |
| import org.apache.directory.api.util.Strings; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A SyntaxChecker which verifies that a value is a UTC time |
| * according to RFC 4517. |
| * |
| * From RFC 4517 : |
| * UTCTime = year month day hour minute [ second ] [ u-time-zone ] |
| * u-time-zone = %x5A ; "Z" | u-differential |
| * u-differential = ( MINUS | PLUS ) hour minute |
| * |
| * year = 2(%x30-39) ; "00" to "99" |
| * month = ( %x30 %x31-39 ) ; "01" (January) to "09" |
| * | ( %x31 %x30-32 ) ; "10" to "12" |
| * day = ( %x30 %x31-39 ) ; "01" to "09" |
| * | ( %x31-32 %x30-39 ) ; "10" to "29" |
| * | ( %x33 %x30-31 ) ; "30" to "31" |
| * hour = ( %x30-31 %x30-39 ) |
| * | ( %x32 %x30-33 ) ; "00" to "23" |
| * minute = %x30-35 %x30-39 ; "00" to "59" |
| * |
| * second = ( %x30-35 %x30-39 ) ; "00" to "59" |
| * |
| * g-time-zone = %x5A ; "Z" |
| * | g-differential |
| * g-differential = ( MINUS / PLUS ) hour [ minute ] |
| * MINUS = %x2D ; minus sign ("-") |
| * |
| * From RFC 4512 : |
| * PLUS = %x2B ; plus sign ("+") |
| * |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| @SuppressWarnings("serial") |
| public class UtcTimeSyntaxChecker extends SyntaxChecker |
| { |
| /** A logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( UtcTimeSyntaxChecker.class ); |
| |
| /** The GeneralizedDate pattern matching */ |
| private static final String UTC_TIME_PATTERN = |
| // year : 00 to 99 |
| "^\\d{2}" |
| // month : 01 to 12 |
| + "(0[1-9]|1[0-2])" |
| // day : 01 to 31 |
| + "(0[1-9]|[12]\\d|3[01])" |
| // hour: 00 to 23 |
| + "([01]\\d|2[0-3])" |
| // minute : 00 to 59 |
| + "([0-5]\\d)" |
| + "(" |
| // optional second : 00 to 59 |
| + "([0-5]\\d)?" |
| // optional time-zone |
| + "(Z|([+-]([01]\\d|2[0-3])[0-5]\\d))?" |
| + ")$"; |
| |
| // The regexp pattern, java.util.regex.Pattern is immutable so only one instance is needed. |
| private static final Pattern DATE_PATTERN = Pattern.compile( UTC_TIME_PATTERN ); |
| |
| |
| /** |
| * |
| * Creates a new instance of UtcTimeSyntaxChecker. |
| * |
| */ |
| public UtcTimeSyntaxChecker() |
| { |
| super( SchemaConstants.UTC_TIME_SYNTAX ); |
| } |
| |
| |
| /** |
| * {@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(); |
| } |
| |
| // A generalized time must have a minimal length of 11 |
| if ( strValue.length() < 11 ) |
| { |
| LOG.debug( "Syntax invalid for '{}'", value ); |
| return false; |
| } |
| |
| // Start the date parsing |
| boolean result = DATE_PATTERN.matcher( strValue ).find(); |
| |
| if ( result ) |
| { |
| LOG.debug( "Syntax valid for '{}'", value ); |
| } |
| else |
| { |
| LOG.debug( "Syntax invalid for '{}'", value ); |
| } |
| return result; |
| } |
| } |