sysLib.javaIsObjID

The system function sysLib.javaIsObjID returns a value (1 for true, 0 for false) to indicate whether a specified identifier is in the object space. sysLib.javaIsObjID is one of several Java access functions.

sysLib.javaIsObjID syntax diagram

returnItem

A numeric item that receives one of two values: 1 for true, 0 for false. Use of a non-numeric item causes an error at validation time.

identifier

An identifier that refers to an object in the object space.

This argument is either a string literal or an item of type CHAR, DBCHAR, MBCHAR, or UNICODE. The identifier must be cast to objID. EGL strips single- and double-byte blanks from the beginning and end of the argument value, which is case sensitive.

An example is as follows:

  // test whether an object is non-existent
  // and process accordingly
  isPresent = sysLib.javaIsObjID( (objId)valueId );
  
  if( isPresent = 0 )
    error = 27;
  end

No run-time errors are associated with sysLib.javaIsObjID.

Related concepts
Java access functions

Related tasks
Syntax diagram