package ca.uhn.hl7v2.conf.spec.message;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import ca.uhn.hl7v2.conf.ProfileException;
   
   /**
    * The specification for a particular field component in a message profile.
   * 
   * @author Bryan Tripp
   */
  public class Component extends AbstractComponent<Component> {
  
  	private final List<SubComponent> components = new ArrayList<>();
  
  	/** Creates a new instance of Component */
  	public Component() {
  	}
  
  	/**
  	 * Indexed getter for property components (index starts at 1 following HL7
  	 * convention).
  	 * 
  	 * @param index
  	 *            Index of the property (starts at 1 following HL7 convention).
  	 * @return Value of the property at <CODE>index</CODE>.
  	 */
  	public SubComponent getSubComponent(int index) {
  		return this.components.get(index - 1);
  	}
  
  	/**
  	 * Indexed setter for property components (index starts at 1 following HL7
  	 * convention).
  	 * 
  	 * @param index
  	 *            Index of the property (starts at 1 following HL7 convention).
  	 * @param component
  	 *            New value of the property at <CODE>index</CODE>.
  	 * 
  	 * @throws ProfileException
  	 */
  	public void setSubComponent(int index, SubComponent component) throws ProfileException {
  		index--;
  		while (components.size() <= index) {
  			components.add(null);
  		}
  		SubComponent oldComponent = this.components.get(index);
  		this.components.set(index, component);
  		try {
  			vetoableChangeSupport.fireVetoableChange("components", null, null);
  		} catch (java.beans.PropertyVetoException vetoException) {
  			this.components.set(index, oldComponent);
  			throw new ProfileException(null, vetoException);
  		}
  		propertyChangeSupport.firePropertyChange("components", null, null);
  	}
  
  
  	/** Returns the number of subcomponents in this component */
  	public int getSubComponents() {
  		return this.components.size();
  	}
  
  	public List<SubComponent> getChildrenAsList() {
  		return (this.components);
  	}
  
  	@Override
  	public String toString() {
  		return "Component[" + getName() + "]";
  	}
  
  }