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 specific field in a message profile.  

  * @author Bryan Tripp

  */

 public class Field extends AbstractComponent<Field> {

     /** Utility field used by bound properties. */

     private java.beans.PropertyChangeSupport propertyChangeSupport =  new java.beans.PropertyChangeSupport(this);

     /** Utility field used by constrained properties. */

     private java.beans.VetoableChangeSupport vetoableChangeSupport =  new java.beans.VetoableChangeSupport(this);

     private short min;

     private short max;

     private short itemNo;

     private final List<Component> components = new ArrayList<Component>();

     /** Creates a new instance of Field */

     public Field() {

     }

     /** Adds a PropertyChangeListener to the listener list.

      * @param l The listener to add.

      */

     public void addPropertyChangeListener(java.beans.PropertyChangeListener l) {

         propertyChangeSupport.addPropertyChangeListener(l);

     }

     /** Removes a PropertyChangeListener from the listener list.

      * @param l The listener to remove.

      */

     public void removePropertyChangeListener(java.beans.PropertyChangeListener l) {

         propertyChangeSupport.removePropertyChangeListener(l);

     }

     /** Adds a VetoableChangeListener to the listener list.

      * @param l The listener to add.

      */

     public void addVetoableChangeListener(java.beans.VetoableChangeListener l) {

         vetoableChangeSupport.addVetoableChangeListener(l);

     }

     /** Removes a VetoableChangeListener from the listener list.

      * @param l The listener to remove.

      */

     public void removeVetoableChangeListener(java.beans.VetoableChangeListener l) {

         vetoableChangeSupport.removeVetoableChangeListener(l);

     }

     /** Getter for property min.

      * @return Value of property min.

      */

     public short getMin() {

         return this.min;

     }

     /** Setter for property min.

      * @param min New value of property min.

      *

      * @throws ProfileException

      */

     public void setMin(short min) throws ProfileException {

         short oldMin = this.min;

         try {

             vetoableChangeSupport.fireVetoableChange("min", oldMin, min);

         } catch (Exception e) {

             throw new ProfileException(null, e);

         }

         this.min = min;

         propertyChangeSupport.firePropertyChange("min", oldMin, min);

     }

     /** Getter for property max.

      * @return Value of property max.

      */

     public short getMax() {

         return this.max;

     }

     /** Setter for property max.

      * @param max New value of property max.

      *

      * @throws ProfileException

      */

     public void setMax(short max) throws ProfileException {

         short oldMax = this.max;

         try {

             vetoableChangeSupport.fireVetoableChange("max", oldMax, max);

         } catch (Exception e) {

             throw new ProfileException(null, e);

         }

         this.max = max;

         propertyChangeSupport.firePropertyChange("max", oldMax, max);

     }

     /** Getter for property itemNo.

      * @return Value of property itemNo.

      */

     public short getItemNo() {

         return this.itemNo;

     }

     /** Setter for property itemNo.

      * @param itemNo New value of property itemNo.

      *

      * @throws ProfileException

      */

     public void setItemNo(short itemNo) throws ProfileException {

         short oldItemNo = this.itemNo;

         try {

             vetoableChangeSupport.fireVetoableChange("itemNo", new Short(oldItemNo), new Short(itemNo));

         } catch (Exception e) {

             throw new ProfileException(null, e);

         }            

         this.itemNo = itemNo;

         propertyChangeSupport.firePropertyChange("itemNo", new Short(oldItemNo), new Short(itemNo));

     }    

     /** 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 Component getComponent(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 setComponent(int index, Component component) throws ProfileException {

         index--;

         while (components.size() <= index) {

                 components.add(null);

         }

         Component 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 components */

     public int getComponents() {

                 return this.components.size();

     }

     /** Returns the number of components */

     public List<Component> getChildrenAsList() {

         return (this.components);

     }

 }