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

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.MathAtan

All Implemented Interfaces

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

public final class MathAtan

extends MathOperator

implements UnaryOperator

Arc tangent operator.

Input 1: A Number (or expression returning a Number) that is LHS of the operator.
Returns: A Number: java.lang.Math.asin( LHS ).

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.UnaryOperator

UNARY_OPERAND_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

MathAtan()

MathAtan(Object lhs)

Method Summary

Object	getOperand() Returns unary operand.
Class[]	getParameterSignature() Returns the parameter signature for this Expression.

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

MathAtan

public MathAtan()

MathAtan

public MathAtan(Object lhs)

Method Detail

getOperand

public Object getOperand()

Description copied from interface: UnaryOperator

Returns unary operand.

Specified by:

getOperand in interface UnaryOperator

Returns

An unary 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.

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