com.bea.p13n.expression.operator.math
Class MathRandom

java.lang.Object
  com.bea.p13n.expression.internal.ComplexExpressionImpl
      com.bea.p13n.expression.operator.Operator
          com.bea.p13n.expression.operator.math.MathOperator
              com.bea.p13n.expression.operator.math.MathRandom

All Implemented Interfaces

Expression, com.bea.p13n.expression.ExpressionEvents, BinaryOperator, Serializable, Cloneable

public final class MathRandom
extends MathOperator
implements BinaryOperator

Random number operator.

Input 1: A Number (or expression returning a Number) that is the minimum random number returned by the operator.
Input 2: A Number (or expression returning a Number) that is the maximum random number returned by the operator.
Returns: A Number: java.lang.Math.random() between LHS and RHS.

See Also

Serialized Form

Field Summary

Fields inherited from class com.bea.p13n.expression.operator.math.MathOperator

BINARY_PARAMETER_SIGNATURE, UNARY_PARAMETER_SIGNATURE

Fields inherited from interface com.bea.p13n.expression.operator.BinaryOperator

LHS_INDEX, RHS_INDEX

Fields inherited from interface com.bea.p13n.expression.ExpressionEvents

EVENT_ADD_SUBEXPRESSION, EVENT_CLEAR_CACHE, EVENT_INTERNAL_MAX, EVENT_REMOVE_SUBEXPRESSION, EVENT_SET_CACHE_ENABLED, EVENT_SET_CACHED_VALUE, EVENT_SET_PARENT, EVENT_SET_SOURCE, EVENT_SET_SUBEXPRESSION, EVENT_SET_USER_DATA

Constructor Summary

MathRandom()

MathRandom(Object min, Object max)

Method Summary

Object	getLeftHandSide() Returns left hand side operand of this binary operator.
Object	getMax() Returns the maximum Number (or an expression returning a Number) that can be generated.
Object	getMin() Returns the minimum Number (or an expression returning a Number) that can be generated.
Class[]	getParameterSignature() Returns the parameter signature for this Expression.
Object	getRightHandSide() Returns right hand side operand of this binary operator.

Methods inherited from class com.bea.p13n.expression.operator.Operator

leftHandSide, operand, rightHandSide

Methods inherited from class com.bea.p13n.expression.internal.ComplexExpressionImpl

addListener, addSubExpression, clearCache, clone, createProxyExpression, equals, getCachedValue, getParent, getSource, getSubExpression, getSubExpressionCount, getUserData, hashCode, isCached, isCacheEnabled, isEqualitySubExpression, notifyListeners, removeAllSubExpressions, removeListener, removeSubExpression, removeSubExpression, setCachedValue, setCacheEnabled, setParent, setSource, setSubExpression, setUserData, toString, write

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MathRandom

public MathRandom()

MathRandom

public MathRandom(Object min,
                  Object max)

Method Detail

getMin

public Object getMin()

Returns the minimum Number (or an expression returning a Number) that can be generated.

Returns

The minimum Number that can be generated.

getMax

public Object getMax()

Returns the maximum Number (or an expression returning a Number) that can be generated.

Returns

The maximum Number that can be generated.

getLeftHandSide

public Object getLeftHandSide()

Description copied from interface: BinaryOperator

Returns left hand side operand of this binary operator.

Specified by:

getLeftHandSide in interface BinaryOperator

Returns

The left hand side operand.

getRightHandSide

public Object getRightHandSide()

Description copied from interface: BinaryOperator

Returns right hand side operand of this binary operator.

Specified by:

getRightHandSide in interface BinaryOperator

Returns

The left hand side operand.

getParameterSignature

public Class[] getParameterSignature()

Description copied from interface: Expression

Returns the parameter signature for this Expression. Because the sub-expressions within the Expression are typically arguments or operands, some type validation is performed by examining the class types of the sub-expressions against the Expression's parameter signature.
The tests that are performed are:
1. The number of sub-expressions must equals the number of parameter entries.
2. The class type of any sub-expression (or the result of evaluating the sub-expresssion) must equal the class type of the corresponding parameter entry.
3. Any null parameter entries are ignored and are considered optional sub-expressions.

Specified by:

getParameterSignature in interface Expression

Returns

the Class array containing the parameter signature.