package org.springframework.batch.item.file.transform;
   
   import java.text.DateFormat;
   import java.text.NumberFormat;
   
   /**
    * Default implementation of {@link FieldSetFactory} with no special knowledge
    * of the {@link FieldSet} required. Returns a {@link DefaultFieldSet} from both
    * factory methods.
   * 
   * @author Dave Syer
   * 
   */
  public class DefaultFieldSetFactory implements FieldSetFactory {
  
  	private DateFormat dateFormat;
  
  	private NumberFormat numberFormat;
  
  	/**
  	 * The {@link NumberFormat} to use for parsing numbers. If unset the default
  	 * locale will be used.
  	 * @param numberFormat the {@link NumberFormat} to use for number parsing
  	 */
  	public void setNumberFormat(NumberFormat numberFormat) {
  		this.numberFormat = numberFormat;
  	}
  
  	/**
  	 * The {@link DateFormat} to use for parsing numbers. If unset the default
  	 * pattern is ISO standard <code>yyyy/MM/dd</code>.
  	 * @param dateFormat the {@link DateFormat} to use for date parsing
  	 */
  	public void setDateFormat(DateFormat dateFormat) {
  		this.dateFormat = dateFormat;
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
      @Override
  	public FieldSet create(String[] values, String[] names) {
  		DefaultFieldSet fieldSet = new DefaultFieldSet(values, names);
  		return enhance(fieldSet);
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
      @Override
  	public FieldSet create(String[] values) {
  		DefaultFieldSet fieldSet = new DefaultFieldSet(values);
  		return enhance(fieldSet);
  	}
  
  	private FieldSet enhance(DefaultFieldSet fieldSet) {
  		if (dateFormat!=null) {
  			fieldSet.setDateFormat(dateFormat);
  		}
  		if (numberFormat!=null) {
  			fieldSet.setNumberFormat(numberFormat);
  		}	
  		return fieldSet;
  	}
  
  }