package net.sf.jasperreports.charts.fill;

import net.sf.jasperreports.charts.JRValueDataset;
import net.sf.jasperreports.engine.JRChartDataset;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.JRExpressionCollector;
import net.sf.jasperreports.engine.design.JRVerifier;
import net.sf.jasperreports.engine.fill.JRCalculator;
import net.sf.jasperreports.engine.fill.JRExpressionEvalException;
import net.sf.jasperreports.engine.fill.JRFillChartDataset;
import net.sf.jasperreports.engine.fill.JRFillObjectFactory;
import org.jfree.data.general.Dataset;
import org.jfree.data.general.DefaultValueDataset;

public class JRFillValueDataset extends JRFillChartDataset implements JRValueDataset {
  private Number value = null;
  
  private DefaultValueDataset valueDataset = new DefaultValueDataset();
  
  public JRFillValueDataset(JRValueDataset valueDataset, JRFillObjectFactory factory) {
    super((JRChartDataset)valueDataset, factory);
  }
  
  public JRExpression getValueExpression() {
    return ((JRValueDataset)this.parent).getValueExpression();
  }
  
  protected void customInitialize() {
    this.valueDataset = new DefaultValueDataset();
  }
  
  protected void customEvaluate(JRCalculator calculator) throws JRExpressionEvalException {
    this.value = (Number)calculator.evaluate(getValueExpression());
  }
  
  protected void customIncrement() {
    this.valueDataset.setValue(this.value);
  }
  
  public Dataset getCustomDataset() {
    return (Dataset)this.valueDataset;
  }
  
  public byte getDatasetType() {
    return 8;
  }
  
  public void collectExpressions(JRExpressionCollector collector) {
    collector.collect(this);
  }
  
  public void validate(JRVerifier verifier) {
    verifier.verify(this);
  }
}