FindPattern.java

package HiveUDF; 
 import java.util.regex.Matcher; 
 import java.util.regex.Pattern; 
 import org.apache.hadoop.hive.ql.exec.UDF; 
 public final class FindPattern extends UDF 
 { 
     public static String evaluate(String targetString, String strPattern) 
     {                  
         // Pattern matching on the input pattern 
         Pattern p = Pattern.compile(strPattern); 
         Matcher m = p.matcher(targetString); 
         String res=null;          

         // if we find a match, get the group 
         if (m.find()) 
         {  
             // Get the first group that matches 
             res= m.group(0); 
             return(res); 
         } 
    }
 }