pstypes
Interface PSObject

All Known Subinterfaces:

PSArithmeticOperator, PSConsoleOperator, PSEqualityOperator, PSFlowOperator, PSLiteral, PSOperator, PSPathOperator, PSStackOperator, PSStringOperator

All Known Implementing Classes:

PSAbs, PSAdd, PSArc, PSArct, PSBoolean, PSClear, PSClosepath, PSCurrentpoint, PSDeq, PSDiv, PSDup, PSEq, PSExch, PSExecArray, PSExit, PSFor, PSGe, PSGet, PSGt, PSIdiv, PSIf, PSIfelse, PSIndex, PSLe, PSLength, PSLineto, PSLoop, PSLt, PSMod, PSMoveto, PSMul, PSNe, PSNewpath, PSNumber, PSPop, PSPstack, PSRlineto, PSRmoveto, PSShow, PSShowpage, PSString, PSString, PSStroke, PSSub

public interface PSObject

The top root of Postscript object hierarchy.

PSObject is an empty interface definition. It is used only to tag which classes can be valid objects for Postscript programming language.

If a class is tagged with PSObject then it valid,otherwise is not. Another reason why this blank interface is used,is to create a top root for the interface hierarchy trees so that the two direct known subinterfaces,PSLiteral and PSOperator,can have a common top level.

PSObject can also be used as a supertype for many other subinterfaces (and classes that implement those subinterfaces) so that more wider points of object views can be used. Each subinterface that extends this interface,gains only in semantics and nothing more.