org.basex.query.xquery.expr
Enum Calc

java.lang.Object
  java.lang.Enum<Calc>
      org.basex.query.xquery.expr.Calc

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<Calc>

public enum Calc
extends java.lang.Enum<Calc>

Calculation.

Author:

Workgroup DBIS, University of Konstanz 2005-07, ISC License, Christian Gruen

Enum Constant Summary

DIV
Division.

IDIV
Integer division.

MINUS
Subtraction.

MOD
Modulo.

MULT
Multiplication.

PLUS
Addition.

Field Summary

java.lang.String

name Name of operation.

Method Summary

abstract Item	eval(Item a, Item b) Performs the calculation.
java.lang.String	info() Returns a string representation of the operator.
java.lang.String	toString()
static Type	type(Item a, Item b) Returns the numeric type with the highest precedence.
static Calc	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static Calc[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

DIV

public static final Calc DIV

Division.

IDIV

public static final Calc IDIV

Integer division.

MINUS

public static final Calc MINUS

Subtraction.

MOD

public static final Calc MOD

Modulo.

MULT

public static final Calc MULT

Multiplication.

PLUS

public static final Calc PLUS

Addition.

Field Detail

name

public final java.lang.String name

Name of operation.

Method Detail

eval

public abstract Item eval(Item a,
                          Item b)
                   throws XQException

Performs the calculation.

Parameters:

a - first item

b - second item

Returns:

result type

Throws:

XQException - evaluation exception

info

public java.lang.String info()

Returns a string representation of the operator.

Returns:

string

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Enum<Calc>

type

public static final Type type(Item a,
                              Item b)

Returns the numeric type with the highest precedence.

Parameters:

a - first item

b - second item

Returns:

type

valueOf

public static Calc valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

values

public static Calc[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Calc c : Calc.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared