com.hp.hpl.jena.graph.query
Class Expression.Application

java.lang.Object
  com.hp.hpl.jena.graph.query.Expression.Base
      com.hp.hpl.jena.graph.query.Expression.Application

All Implemented Interfaces:

Expression

Direct Known Subclasses:

Dyadic

Enclosing interface:

Expression

public abstract static class Expression.Application
extends Expression.Base

An abstract base class for apply nodes; subclasses implement getFun(), argCount(), and getArg().

Nested Class Summary

Nested classes/interfaces inherited from interface com.hp.hpl.jena.graph.query.Expression

Expression.Application, Expression.Base, Expression.BoolConstant, Expression.Constant, Expression.Fixed, Expression.Util, Expression.Valof, Expression.Variable

Field Summary

Fields inherited from interface com.hp.hpl.jena.graph.query.Expression

FALSE, TRUE

Constructor Summary

Expression.Application()

Method Summary

abstract int	argCount() If this Expression is an application, answer the number of arguments that it has.
abstract Expression	getArg(int i) If this Expression is an application, and 0 <= i < argCount(), answer the ith argument.
abstract String	getFun() If this Expression is an application, return the string identifying the function, which should be a URI.
boolean	isApply() Answer true iff this Expression represents the application of some function [or operator] to some arguments [or operands].

Methods inherited from class com.hp.hpl.jena.graph.query.Expression.Base

equals, getName, getValue, isConstant, isVariable

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.hp.hpl.jena.graph.query.Expression

prepare

Constructor Detail

Expression.Application

public Expression.Application()

Method Detail

isApply

public boolean isApply()

Description copied from interface: Expression

Answer true iff this Expression represents the application of some function [or operator] to some arguments [or operands].

Specified by:

isApply in interface Expression

Overrides:

isApply in class Expression.Base

argCount

public abstract int argCount()

Description copied from interface: Expression

If this Expression is an application, answer the number of arguments that it has. Otherwise the behaviour is unspecified.

Specified by:

argCount in interface Expression

Overrides:

argCount in class Expression.Base

getFun

public abstract String getFun()

Description copied from interface: Expression

If this Expression is an application, return the string identifying the function, which should be a URI. Otherwise the behaviour is unspecified.

Specified by:

getFun in interface Expression

Overrides:

getFun in class Expression.Base

getArg

public abstract Expression getArg(int i)

Description copied from interface: Expression

If this Expression is an application, and 0 <= i < argCount(), answer the ith argument. Otherwise the behaviour is unspecified.

Specified by:

getArg in interface Expression

Overrides:

getArg in class Expression.Base