package jxl.biff;

import jxl.common.Logger;

public class DValParser {
  private static Logger logger = Logger.getLogger(DValParser.class);
  
  private static int PROMPT_BOX_VISIBLE_MASK = 1;
  
  private static int PROMPT_BOX_AT_CELL_MASK = 2;
  
  private static int VALIDITY_DATA_CACHED_MASK = 4;
  
  private boolean promptBoxVisible;
  
  private boolean promptBoxAtCell;
  
  private boolean validityDataCached;
  
  private int numDVRecords;
  
  private int objectId;
  
  public DValParser(byte[] data) {
    int options = IntegerHelper.getInt(data[0], data[1]);
    this.promptBoxVisible = ((options & PROMPT_BOX_VISIBLE_MASK) != 0);
    this.promptBoxAtCell = ((options & PROMPT_BOX_AT_CELL_MASK) != 0);
    this.validityDataCached = ((options & VALIDITY_DATA_CACHED_MASK) != 0);
    this.objectId = IntegerHelper.getInt(data[10], data[11], data[12], data[13]);
    this.numDVRecords = IntegerHelper.getInt(data[14], data[15], data[16], data[17]);
  }
  
  public DValParser(int objid, int num) {
    this.objectId = objid;
    this.numDVRecords = num;
    this.validityDataCached = true;
  }
  
  public byte[] getData() {
    byte[] data = new byte[18];
    int options = 0;
    if (this.promptBoxVisible)
      options |= PROMPT_BOX_VISIBLE_MASK; 
    if (this.promptBoxAtCell)
      options |= PROMPT_BOX_AT_CELL_MASK; 
    if (this.validityDataCached)
      options |= VALIDITY_DATA_CACHED_MASK; 
    IntegerHelper.getTwoBytes(options, data, 0);
    IntegerHelper.getFourBytes(this.objectId, data, 10);
    IntegerHelper.getFourBytes(this.numDVRecords, data, 14);
    return data;
  }
  
  public void dvRemoved() {
    this.numDVRecords--;
  }
  
  public int getNumberOfDVRecords() {
    return this.numDVRecords;
  }
  
  public int getObjectId() {
    return this.objectId;
  }
  
  public void dvAdded() {
    this.numDVRecords++;
  }
}