001    /**
002    The contents of this file are subject to the Mozilla Public License Version 1.1 
003    (the "License"); you may not use this file except in compliance with the License. 
004    You may obtain a copy of the License at http://www.mozilla.org/MPL/ 
005    Software distributed under the License is distributed on an "AS IS" basis, 
006    WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the 
007    specific language governing rights and limitations under the License. 
008    
009    The Original Code is "TrimLeadingWhitespaceRule.java".  Description: 
010    "Performs no validation but removes leading whitespace in the correct() method." 
011    
012    The Initial Developer of the Original Code is University Health Network. Copyright (C) 
013    2004.  All Rights Reserved. 
014    
015    Contributor(s): ______________________________________. 
016    
017    Alternatively, the contents of this file may be used under the terms of the 
018    GNU General Public License (the "GPL"), in which case the provisions of the GPL are 
019    applicable instead of those above.  If you wish to allow use of your version of this 
020    file only under the terms of the GPL and not to allow others to use your version 
021    of this file under the MPL, indicate your decision by deleting  the provisions above 
022    and replace  them with the notice and other provisions required by the GPL License.  
023    If you do not delete the provisions above, a recipient may use your version of 
024    this file under either the MPL or the GPL. 
025    */
026    package ca.uhn.hl7v2.validation.impl;
027    
028    import java.util.regex.Pattern;
029    
030    import ca.uhn.hl7v2.validation.PrimitiveTypeRule;
031    
032    /**
033     * Performs no validation but removes leading whitespace in the correct() method.
034     *   
035     * @author <a href="mailto:bryan.tripp@uhn.on.ca">Bryan Tripp</a>
036     * @author Christian Ohr
037     */
038    @SuppressWarnings("serial")
039    public class TrimLeadingWhitespace implements PrimitiveTypeRule {
040    
041            private static final Pattern LEADING_WHITESPACE = Pattern.compile("^\\s+");
042            
043        /** 
044         * Removes leading whitespace. 
045         * 
046         * @see ca.uhn.hl7v2.validation.PrimitiveTypeRule#correct(java.lang.String)
047         */
048        public String correct(String value) {
049            return value != null ? LEADING_WHITESPACE.matcher(value).replaceAll("") : null;
050        }
051    
052        /** 
053         * Returns true. 
054         * @see ca.uhn.hl7v2.validation.PrimitiveTypeRule#test(java.lang.String)
055         */
056        public boolean test(String value) {
057            return true;
058        }
059    
060        /** 
061         * @see ca.uhn.hl7v2.validation.Rule#getDescription()
062         */
063        public String getDescription() {
064            return "Leading whitespace removed";
065        }
066    
067        /** 
068         * @see ca.uhn.hl7v2.validation.Rule#getSectionReference()
069         */
070        public String getSectionReference() {
071            return null;
072        }
073    
074    }