package net.sf.jasperreports.engine.base;

import net.sf.jasperreports.engine.JRBand;
import net.sf.jasperreports.engine.JRElementGroup;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.design.events.JRChangeEventsSupport;
import net.sf.jasperreports.engine.design.events.JRPropertyChangeSupport;

public class JRBaseBand extends JRBaseElementGroup implements JRBand, JRChangeEventsSupport {
  private static final long serialVersionUID = 10200L;
  
  public static final String PROPERTY_SPLIT_ALLOWED = "splitAllowed";
  
  protected int height = 0;
  
  protected boolean isSplitAllowed = true;
  
  protected JRExpression printWhenExpression = null;
  
  private transient JRPropertyChangeSupport eventSupport;
  
  protected JRBaseBand(JRBand band, JRBaseObjectFactory factory) {
    super((JRElementGroup)band, factory);
    this.height = band.getHeight();
    this.isSplitAllowed = band.isSplitAllowed();
    this.printWhenExpression = factory.getExpression(band.getPrintWhenExpression());
  }
  
  public int getHeight() {
    return this.height;
  }
  
  public boolean isSplitAllowed() {
    return this.isSplitAllowed;
  }
  
  public void setSplitAllowed(boolean isSplitAllowed) {
    boolean old = this.isSplitAllowed;
    this.isSplitAllowed = isSplitAllowed;
    getEventSupport().firePropertyChange("splitAllowed", old, this.isSplitAllowed);
  }
  
  public JRExpression getPrintWhenExpression() {
    return this.printWhenExpression;
  }
  
  public Object clone() {
    JRBaseBand clone = (JRBaseBand)super.clone();
    if (this.printWhenExpression != null)
      clone.printWhenExpression = (JRExpression)this.printWhenExpression.clone(); 
    return clone;
  }
  
  public JRPropertyChangeSupport getEventSupport() {
    synchronized (this) {
      if (this.eventSupport == null)
        this.eventSupport = new JRPropertyChangeSupport(this); 
    } 
    return this.eventSupport;
  }
}