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

Class ConstraintUtil

java.lang.Object

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

public class ConstraintUtil
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static String	DROOLS_NORMALIZE_CONSTRAINT

Method Summary

Modifier and Type	Method	Description
static String	inverseExpression(org.drools.drl.ast.descr.RelationalExprDescr relDescr, String expression, String leftValue, String rightValue, String operator, org.drools.core.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 String DROOLS_NORMALIZE_CONSTRAINT

See Also:

Constant Field Values

Method Detail

inverseExpression

public static String inverseExpression(org.drools.drl.ast.descr.RelationalExprDescr relDescr,
                                       String expression,
                                       String leftValue,
                                       String rightValue,
                                       String operator,
                                       org.drools.core.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