edu.mit.ai.psg.jevaES
Class JNELiteralExpression

java.lang.Object
  |
  +--edu.mit.ai.psg.jevaES.SimpleNode
        |
        +--edu.mit.ai.psg.jevaES.JevaNode
              |
              +--edu.mit.ai.psg.jevaES.ExpressionNode
                    |
                    +--edu.mit.ai.psg.jevaES.JNELiteralExpression

public class JNELiteralExpression

extends ExpressionNode

Jeva parse node for literal expressions (1, 3.14, "Hi", etc.)

Author:

CarlManning, caroma@ai.mit.edu
Copyright (c) 1997, 1998 Massachusetts Institute of Technology

Fields inherited from class edu.mit.ai.psg.jevaES.SimpleNode

children, id, parent

Method Summary

boolean	computeIsConstant(IEnv env)
Class	computeType(IEnv env)
Object	eval(IEnv env) This should never be called.
void	setValue(Object val, Class literalType)

Methods inherited from class edu.mit.ai.psg.jevaES.ExpressionNode

getType, getValue, isConstant

Methods inherited from class edu.mit.ai.psg.jevaES.JevaNode

getBeginToken, getEndToken, print, print, printToken, printToString, printToString, setBeginToken, setEndToken

Methods inherited from class edu.mit.ai.psg.jevaES.SimpleNode

dump, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, toString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

setValue

public void setValue(Object val,
                     Class literalType)

computeIsConstant

public boolean computeIsConstant(IEnv env)

Overrides:

computeIsConstant in class ExpressionNode

computeType

public Class computeType(IEnv env)

Overrides:

computeType in class ExpressionNode

eval

public Object eval(IEnv env)

This should never be called. EvalMethods.eval calls getValue, which calls eval only if it isn't a constant already computed. Literals are computed at parse time, so they are always computed.

Overrides:

eval in class ExpressionNode