com.nt.udc.io

Class COSARExpr

java.lang.Object

com.nt.udc.io.COSARExpr

Direct Known Subclasses:

COSARExprAnd, COSARExprBinaryNumOp, COSARExprConcat, COSARExprDouble, COSARExprFunc, COSARExprHex2Dec, COSARExprID, COSARExprInt, COSARExprLen, COSARExprNot, COSARExprOr, COSARExprPos, COSARExprRandom, COSARExprRelationalNumOp, COSARExprStr2Time, COSARExprString, COSARExprSubstr, COSARExprTest, COSARExprTime2Str, COSARExprTimeNow, COSARExprUnaryMinus

public abstract class COSARExpr
extends java.lang.Object

This class represents the abstract base-class for all OSAR expressions.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	m_bIsConstant This member variable is set to true if the expression's value is constant.

Constructor Summary

Constructors

Constructor and Description
COSARExpr()

Method Summary

Methods

Modifier and Type	Method and Description
COSARAttr	eval(java.util.HashMap symbols) This function is used to evaluate the expression.
boolean	isConstant()

Methods inherited from class java.lang.Object

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

Field Detail

m_bIsConstant

protected boolean m_bIsConstant

This member variable is set to true if the expression's value is constant.

Constructor Detail

COSARExpr

public COSARExpr()

Method Detail

eval

public COSARAttr eval(java.util.HashMap symbols)
               throws java.lang.Exception

This function is used to evaluate the expression. A symbol table is passed to help in retrieving the value of referenced symbols. The HashMap should contain values stored as COSARAttr objects, keyed by their associated symbol's name.

Returns:

The expression's value

Throws:

java.lang.Exception

isConstant

public final boolean isConstant()

Returns:

true if the expression is constant