package jalview.io.gff;

import jalview.datamodel.AlignmentI;
import jalview.datamodel.SequenceFeature;
import jalview.datamodel.SequenceI;

import java.io.IOException;
import java.util.List;
import java.util.Map;

public class Gff2Helper extends GffHelperBase
{
  /**
   * GFF2 uses space character to delimit name/value pairs on column 9
   * 
   * @param text
   * @return
   */
  public static Map<String, List<String>> parseNameValuePairs(String text)
  {
    // TODO: can a value include a comma? if so it will be broken by this
    return parseNameValuePairs(text, ";", ' ', ",");
  }

  /**
   * Return ' ' as the name-value separator used in column 9 attributes.
   */
  @Override
  protected char getNameValueSeparator()
  {
    return ' ';
  }

  /**
   * Default processing if not overridden is just to construct a sequence
   * feature
   */
  @Override
  public SequenceFeature processGff(SequenceI seq, String[] gff,
          AlignmentI align, List<SequenceI> newseqs,
          boolean relaxedIdMatching) throws IOException
  {
    Map<String, List<String>> attributes = null;
    if (gff.length > ATTRIBUTES_COL)
    {
      attributes = parseNameValuePairs(gff[ATTRIBUTES_COL]);
    }
    return buildSequenceFeature(gff, attributes);
  }

}