| /* |
| * 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.fortress.core.util; |
| |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.apache.directory.api.util.Strings; |
| import org.apache.directory.fortress.core.GlobalErrIds; |
| import org.apache.directory.fortress.core.GlobalIds; |
| import org.apache.directory.fortress.core.ValidationException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * Regular expression utilities to perform data validations on Fortress attributes. These utils use the standard |
| * java regular expression library. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| final class RegExUtil |
| { |
| private static final String CLS_NM = RegExUtil.class.getName(); |
| private static final Logger LOG = LoggerFactory.getLogger( CLS_NM ); |
| private String SAFE_TEXT_PATTERN_STRING; |
| private static Pattern safeTextPattern; |
| |
| private static volatile RegExUtil sINSTANCE = null; |
| |
| public static RegExUtil getInstance() |
| { |
| if(sINSTANCE == null) |
| { |
| synchronized (RegExUtil.class) |
| { |
| if(sINSTANCE == null){ |
| sINSTANCE = new RegExUtil(); |
| } |
| } |
| } |
| return sINSTANCE; |
| } |
| |
| private void init() |
| { |
| SAFE_TEXT_PATTERN_STRING = Config.getInstance().getProperty( GlobalIds.REG_EX_SAFE_TEXT ); |
| |
| if ( ( SAFE_TEXT_PATTERN_STRING != null ) && ( SAFE_TEXT_PATTERN_STRING.length() != 0 ) ) |
| { |
| safeTextPattern = Pattern.compile( SAFE_TEXT_PATTERN_STRING ); |
| } |
| } |
| |
| /** |
| * Private constructor |
| * |
| */ |
| private RegExUtil() |
| { |
| init(); |
| } |
| |
| /** |
| * Perform safe text validation on character string. |
| * |
| * @param value Contains the string to check. |
| * @exception org.apache.directory.fortress.core.ValidationException In the event the data validation fails. |
| */ |
| void safeText( String value ) throws ValidationException |
| { |
| if ( Strings.isEmpty( SAFE_TEXT_PATTERN_STRING ) ) |
| { |
| LOG.debug( "safeText can't find safeText regular expression pattern. Check your Fortress cfg" ); |
| } |
| else |
| { |
| Matcher safeTextMatcher = safeTextPattern.matcher( value ); |
| |
| if ( !safeTextMatcher.find() ) |
| { |
| String error = "safeText has detected invalid value [" + value + "]"; |
| throw new ValidationException( GlobalErrIds.CONST_INVLD_TEXT, error ); |
| } |
| } |
| } |
| } |