/* * 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:[email protected]">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 ); } } } }