package org.kuali.ole.sys.batch;
   
   import java.util.List;
   
   import org.springframework.util.StringUtils;
   
   /**
    * The abstract base class of the configuration element which specifies how to parse flat files
    */
  public abstract class AbstractFlatFilePrefixSpecificationBase extends AbstractFlatFileSpecificationBase {
      protected List<String> insignificantPrefixes;
      protected int prefixStartingPosition = 0;
  
      /**
       * This method determine the class of the given line. It checks the prefix list to see if the line started with what ever the
       * prefix of the line and returns the class; if not , it returns the default class.
       * @param line the line to determine the class of
       * @see org.kuali.ole.sys.batch.FlatFileSpecification#determineClassForLine(String)
       */
      public Class<?> determineClassForLine(String line) {
          if (line != null) {
              if (objectSpecifications != null && !objectSpecifications.isEmpty()) {
                  for (FlatFileObjectSpecification objectSpecification : objectSpecifications) {
                      final FlatFilePrefixObjectSpecification prefixObjectSpecification = (FlatFilePrefixObjectSpecification)objectSpecification;
                      String prefix = prefixObjectSpecification.getLinePrefix();
                      if ((prefix != null) && (line.length() >= (prefixStartingPosition + prefix.length())) && 
                              (line.substring(prefixStartingPosition, prefixStartingPosition + prefix.length()).equals(prefix))) {
                          return objectSpecification.getBusinessObjectClass();
                      }
                  }
              }
              if (insignificantPrefixes != null && !insignificantPrefixes.isEmpty()) {
                  for (String insignificantPrefix : insignificantPrefixes) {
                      if ((line.length() >= (prefixStartingPosition + insignificantPrefix.length())) && 
                              line.substring(prefixStartingPosition, prefixStartingPosition + insignificantPrefix.length()).
                              equals(insignificantPrefix)) {
                          return null; // don't return any class for an insignificant prefix
                      }
                  }
              }
              return defaultBusinessObjectClass;
          }
  
          return null;
      }
  
      /**
       * Sets the list of prefixes which mean that the line is not to be parsed
       * @param insignificantPrefixes
       */
      public void setInsignificantPrefixes(List<String> insignificantPrefixes) {
          this.insignificantPrefixes = insignificantPrefixes;
      }
  
      /**
       * Determines where the starting position in the String to look for the prefix substring is; if not set, defaults to 0, the beginning of the String
       * @param prefixStartingPosition the starting position in the String of the prefix substring
       */
      public void setPrefixStartingPosition(int prefixStartingPosition) {
          this.prefixStartingPosition = prefixStartingPosition;
      }
  }