org.springframework.rules.constraint
Class ComparisonBinaryPredicate

Show UML class diagram

java.lang.Object
  org.springframework.rules.closure.support.AlgorithmsAccessor
      org.springframework.rules.constraint.ConstraintsAccessor
          org.springframework.rules.constraint.AbstractBinaryConstraint
              org.springframework.rules.constraint.ComparisonBinaryPredicate

All Implemented Interfaces:

BinaryConstraint, Constraint

Direct Known Subclasses:

EqualTo, GreaterThan, GreaterThanEqualTo, LessThan, LessThanEqualTo

public abstract class ComparisonBinaryPredicate
extends AbstractBinaryConstraint

Abstract helper superclass for binary predicates involved in comparison operations.

Author:

Keith Donald

Constructor Summary

protected	ComparisonBinaryPredicate() Creates a comparing binary predicate which operates on Comparable objects.
protected	ComparisonBinaryPredicate(Comparator comparator) Creates a comparing binary predicate which compares using the provided Comparator.

Method Summary

Comparator	getComparator() Returns the comparator which is used to compare the arguments
boolean	test(Object argument1, Object argument2) Tests two arguments against a comparsion expression.
protected abstract boolean	testCompareResult(int result) Template method for evaluating the compare result.

Methods inherited from class org.springframework.rules.constraint.AbstractBinaryConstraint

test

Methods inherited from class org.springframework.rules.constraint.ConstraintsAccessor

all, all, and, any, any, bind, bind, bind, bind, bind, conjunction, disjunction, eq, eq, eq, eq, eq, eqProperty, eqProperty, getConstraints, gt, gt, gt, gt, gt, gt, gt, gte, gte, gte, gte, gte, gte, gte, gteProperty, gteProperty, gtProperty, gtProperty, ifTrue, ifTrueElse, inGroup, inGroup, inGroup, inRange, inRange, inRangeProperties, inRangeProperties, like, like, lt, lt, lt, lt, lt, lt, lt, lte, lte, lte, lte, lte, lte, lte, lteProperty, lteProperty, ltProperty, ltProperty, maxLength, method, minLength, not, not, or, present, present, range, range, range, range, range, range, range, regexp, regexp, required, required, testResultOf, unique, value

Methods inherited from class org.springframework.rules.closure.support.AlgorithmsAccessor

allTrue, allTrue, anyTrue, anyTrue, findAll, findAll, findFirst, findFirst, forEach, forEach, getAlgorithms

Methods inherited from class java.lang.Object

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

Constructor Detail

ComparisonBinaryPredicate

protected ComparisonBinaryPredicate()

Creates a comparing binary predicate which operates on Comparable objects.

ComparisonBinaryPredicate

protected ComparisonBinaryPredicate(Comparator comparator)

Creates a comparing binary predicate which compares using the provided Comparator.

Parameters:

comparator - the comparator, may be null

Method Detail

getComparator

public Comparator getComparator()

Returns the comparator which is used to compare the arguments

Returns:

null if no custom comparator is defined

test

public boolean test(Object argument1,
                    Object argument2)

Tests two arguments against a comparsion expression. This method delegates to the testCompareResult(int)template method to evaluate the compareTo result.

Parameters:

argument1 - the first argument

argument2 - the second argument

Returns:

true if the comparsion result passes, false otherwise

testCompareResult

protected abstract boolean testCompareResult(int result)

Template method for evaluating the compare result.

Parameters:

result - The compare result

Returns:

true or false