org.ka2ddo.opentrac
Class OpenTracNull

java.lang.Object
  extended by org.ka2ddo.opentrac.OpenTracElement
      extended by org.ka2ddo.opentrac.OpenTracNull
All Implemented Interfaces:
java.io.Serializable

public class OpenTracNull
extends OpenTracElement

This class represents an OpenTRAC element where the mere presence of the element is the entire value.

See Also:
OpenTracTypes.OPENTRAC_EMERGENCY, Serialized Form

Field Summary
 
Fields inherited from class org.ka2ddo.opentrac.OpenTracElement
id
 
Constructor Summary
OpenTracNull()
          Create an uninitialized null OpenTracElement,
OpenTracNull(int type)
          Create a OpenTracNull element with the specified field type.
 
Method Summary
 int computeBody(byte[] buf, int offset)
          Append this element to a message buffer
 boolean equals(OpenTracElement other)
          Test if this OpenTracElement has the same type and value as another OpenTracElement.
 int length()
          Return the number of bytes needed to encode this element.
 java.lang.String toString()
          Returns a string representation of the object.
 java.lang.String valueString()
          Get the string representation of the value of this element.
 
Methods inherited from class org.ka2ddo.opentrac.OpenTracElement
getId
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

OpenTracNull

public OpenTracNull()
Create an uninitialized null OpenTracElement,


OpenTracNull

public OpenTracNull(int type)
Create a OpenTracNull element with the specified field type.

Parameters:
type - OpenTRAC type code
Method Detail

toString

public java.lang.String toString()
Returns a string representation of the object.

Overrides:
toString in class OpenTracElement
Returns:
a string representation of the object.

valueString

public java.lang.String valueString()
Get the string representation of the value of this element.

Specified by:
valueString in class OpenTracElement
Returns:
value string

computeBody

public int computeBody(byte[] buf,
                       int offset)
Append this element to a message buffer

Specified by:
computeBody in class OpenTracElement
Parameters:
buf - byte array to add the element to
offset - starting index to store the element
Returns:
index after the end of the stored element

length

public int length()
Return the number of bytes needed to encode this element.

Specified by:
length in class OpenTracElement
Returns:
byte count needed to hold this element

equals

public boolean equals(OpenTracElement other)
Test if this OpenTracElement has the same type and value as another OpenTracElement.

Specified by:
equals in class OpenTracElement
Parameters:
other - OpenTracElement to compare against this element
Returns:
boolean true if elements are of the same type, class, and value