net.sourceforge.sasi
Class SASIEval

java.lang.Object
  net.sourceforge.sasi.SASIEval

public class SASIEval

extends java.lang.Object

Provides methods to evalutes an expression to true or false. Each object represents a node in the expression tree The tree is build up by the Parser class/ sasi.cup

Author:

Alexander Merz

Field Summary

static java.lang.String	AND operator constant for the & operator
static java.lang.String	BROWSED
static java.lang.String	COMPLETED
static java.lang.String	EQUAL operator constant for the = operator
static java.lang.String	FAILED
static java.lang.String	INCOMPLETE
static java.lang.String	NOT operator constant for the ~ operator
static java.lang.String	NOTATTEMPTED
static java.lang.String	NOTEQUAL operator constant for the <> operator
static java.lang.String	OR operator constant for the | operator
static java.lang.String	PASSED

Constructor Summary

SASIEval(SASIEval e1)
Constructor for a child node

SASIEval(java.lang.String id)
Constructor for a single identifier aka a 'leaf' in the tree

SASIEval(java.lang.String op, SASIEval e1)
Constructor for a NOT expression

SASIEval(java.lang.String op, SASIEval e1, SASIEval e2)
Constructor for an AND/OR expression

SASIEval(java.lang.String op, java.lang.String id, java.lang.String value)
Constructor for an EQUAL/NOTEQUAL expression

SASIEval(java.lang.String c, java.util.Vector v)
Constructor for a set (c*{Set})

Method Summary

boolean

interpret(java.util.HashMap hm) evaluates the expression of this node to true or false

Methods inherited from class java.lang.Object

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

Field Detail

PASSED

public static java.lang.String PASSED

FAILED

public static java.lang.String FAILED

COMPLETED

public static java.lang.String COMPLETED

INCOMPLETE

public static java.lang.String INCOMPLETE

BROWSED

public static java.lang.String BROWSED

NOTATTEMPTED

public static java.lang.String NOTATTEMPTED

AND

public static java.lang.String AND

operator constant for the & operator

NOT

public static java.lang.String NOT

operator constant for the ~ operator

OR

public static java.lang.String OR

operator constant for the | operator

EQUAL

public static java.lang.String EQUAL

operator constant for the = operator

NOTEQUAL

public static java.lang.String NOTEQUAL

operator constant for the <> operator

Constructor Detail

SASIEval

public SASIEval(java.lang.String id)

Constructor for a single identifier aka a 'leaf' in the tree

Parameters:

id - Identifier

SASIEval

public SASIEval(java.lang.String c,
                java.util.Vector v)

Constructor for a set (c*{Set})

Parameters:

c - the quantifier or null if no quantifier provided

v - the identifiers in the set

SASIEval

public SASIEval(SASIEval e1)

Constructor for a child node

Parameters:

e1 - child node

SASIEval

public SASIEval(java.lang.String op,
                SASIEval e1)

Constructor for a NOT expression

Parameters:

op - operator constant

e1 - child node to evaluate

SASIEval

public SASIEval(java.lang.String op,
                SASIEval e1,
                SASIEval e2)

Constructor for an AND/OR expression

Parameters:

op - operator constant

e1 - left child node to evaluate

e2 - right child node to evaluate

SASIEval

public SASIEval(java.lang.String op,
                java.lang.String id,
                java.lang.String value)

Constructor for an EQUAL/NOTEQUAL expression

Parameters:

op - operator constant

id - Identifier

value - String to compare with

Method Detail

interpret

public boolean interpret(java.util.HashMap hm)

evaluates the expression of this node to true or false

Parameters:

hm - HashMap with the sco states

Returns: