eworks.RQL.model
Class ComparisonCondition

java.lang.Object
  eworks.RQL.model.Condition
      eworks.RQL.model.ComparisonCondition

public class ComparisonCondition

extends Condition

Represents a condition that compares two values against each other.

Version:

1.00 (2003-11-03)

Author:

Fabian Wleklinski (fabian@wleklinski.de)

See Also:

The RDF Query Language (RQL)

Field Summary

protected CompareOperator	op The operator used to compare both values against each other.
protected Value	op1 The first value to compare.
protected Value	op2 The second value to compare.

Constructor Summary

ComparisonCondition(Value op1, CompareOperator op, Value op2)
Creates a new comparison condition using two certain values and a certain operator.

Method Summary

boolean	matches(SymbolTable symbols) Checks if this condition is satisfied by both values, using a certain symbol table.
String	toString() Returns this condition's string representation.

Methods inherited from class eworks.RQL.model.Condition

compact

Methods inherited from class java.lang.Object

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

Field Detail

op1

protected Value op1

The first value to compare.

op2

protected Value op2

The second value to compare.

op

protected CompareOperator op

The operator used to compare both values against each other.

Constructor Detail

ComparisonCondition

public ComparisonCondition(Value op1,
                           CompareOperator op,
                           Value op2)

Creates a new comparison condition using two certain values and a certain operator.

Parameters:

op1 - The first value to compare.

op - The operator used to compare both values against each other.

op2 - The second value to compare.

Method Detail

matches

public boolean matches(SymbolTable symbols)
                throws VariableNotBoundException

Checks if this condition is satisfied by both values, using a certain symbol table.

Specified by:

matches in class Condition

Parameters:

symbols - The symbol table to use.

Returns:

true if this condition is satisfied, false else.

Throws:

VariableNotBoundException - if one or both of this condition's values are not bound by the given symbol table.

toString

public String toString()

Returns this condition's string representation.

Overrides:

toString in class Condition

Returns:

This condition's string representation.