com.gridsystems.beanfilter
Class CompareNode

java.lang.Object
  com.gridsystems.beanfilter.EvalValue
      com.gridsystems.beanfilter.EvalNode
          com.gridsystems.beanfilter.CompareNode

All Implemented Interfaces:

FilterParserConstants

public class CompareNode
extends EvalNode
implements FilterParserConstants

Comparison operation.

Version:

1.0

Author:

Rodrigo Ruiz, Xmas

Field Summary

Fields inherited from class com.gridsystems.beanfilter.EvalValue

BOOLEAN, COLLECTION, NUMBER, STRING, UNKNOWN, VOID

Fields inherited from interface com.gridsystems.beanfilter.FilterParserConstants

ALLITEMS, AND, ANYITEMS, COMMA, CONTAINS, DEFAULT, DOT, EOF, EQ, ESCAPES, EXPONENT, FALSE, GE, GT, IDENTIFIER, IN, LBRACKET, LE, LIKE, LPAREN, LT, MATCHES, NE, NOT, NULL, NUMBER, OR, RBRACKET, RPAREN, SELECT, SIZEOF, STRING, STRING1, STRING2, THIS, tokenImage, TRUE, WHERE

Constructor Summary

CompareNode(EvalValue lval, int op, EvalValue rval, java.lang.Class<?> parentClass)
Creates a new instance.

Method Summary

boolean	eval(java.lang.Object src) Evaluates the node.
static boolean	evaluateOperation(EvalValue lval, EvalValue rval, java.lang.Object lobj, int op, java.lang.Object robj)
EvalValue	getLeftValue() Gets the left value.
int	getOp() Gets the operation of this node.
EvalValue	getRightValue() Gets the right value.
java.lang.String	toString()

Methods inherited from class com.gridsystems.beanfilter.EvalNode

getClassValue, getValue

Methods inherited from class com.gridsystems.beanfilter.EvalValue

getCharPos, getLinePos

Methods inherited from class java.lang.Object

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

Constructor Detail

CompareNode

public CompareNode(EvalValue lval,
                   int op,
                   EvalValue rval,
                   java.lang.Class<?> parentClass)
            throws EvalException

Creates a new instance.

Parameters:

lval - Left operand

op - Operation

rval - Right operand

parentClass - Parent Class

Throws:

EvalException - If an error occurs

Method Detail

eval

public boolean eval(java.lang.Object src)
             throws EvalException

Evaluates the node.

Specified by:

eval in class EvalNode

Parameters:

src - Data source, for dynamic nodes

Returns:

true if src makes true the node

Throws:

EvalException - If an error occurs

evaluateOperation

public static boolean evaluateOperation(EvalValue lval,
                                        EvalValue rval,
                                        java.lang.Object lobj,
                                        int op,
                                        java.lang.Object robj)
                                 throws EvalException

Parameters:

lval - Left EvalValue.

rval - Right EvalValue.

lobj - The left operand

op - Operation

robj - The right operand

Returns:

If evaluation is passed.

Throws:

EvalException - If error

getLeftValue

public EvalValue getLeftValue()

Gets the left value.

Returns:

The left value

getRightValue

public EvalValue getRightValue()

Gets the right value.

Returns:

The right value

getOp

public int getOp()

Gets the operation of this node.

Returns:

This node operation

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object