Package org.drools.compiler.rule.builder.util

Class ConstraintUtil

java.lang.Object

org.drools.compiler.rule.builder.util.ConstraintUtil

public class ConstraintUtil
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	DROOLS_NORMALIZE_CONSTRAINT

Method Summary

Modifier and Type	Method	Description
static java.lang.String	inverseExpression(org.drools.drl.ast.descr.RelationalExprDescr relDescr, java.lang.String expression, java.lang.String leftValue, java.lang.String rightValue, java.lang.String operator, org.drools.base.rule.Pattern pattern)	Swap left and right operands in a constraint when a fact property is located on the right side.

Methods inherited from class java.lang.Object

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

Field Detail

DROOLS_NORMALIZE_CONSTRAINT

public static final java.lang.String DROOLS_NORMALIZE_CONSTRAINT

See Also:

Constant Field Values

Method Detail

inverseExpression

public static java.lang.String inverseExpression(org.drools.drl.ast.descr.RelationalExprDescr relDescr,
                                                 java.lang.String expression,
                                                 java.lang.String leftValue,
                                                 java.lang.String rightValue,
                                                 java.lang.String operator,
                                                 org.drools.base.rule.Pattern pattern)

Swap left and right operands in a constraint when a fact property is located on the right side. e.g. Person(20 < age) should be normalized to Person(age > 20)

Parameters:

expression -

operator -

rightValue -

leftValue -

Returns:

Normalized expression