org.basex.query.xquery.expr
Enum Calc

java.lang.Object
  extended by java.lang.Enum<Calc>
      extended by 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 2005-08, 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 ev(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

PLUS

public static final Calc PLUS
Addition.


MINUS

public static final Calc MINUS
Subtraction.


MULT

public static final Calc MULT
Multiplication.


DIV

public static final Calc DIV
Division.


IDIV

public static final Calc IDIV
Integer division.


MOD

public static final Calc MOD
Modulo.

Field Detail

name

public final java.lang.String name
Name of operation.

Method Detail

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

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

ev

public abstract Item ev(Item a,
                        Item b)
                 throws XQException
Performs the calculation.

Parameters:
a - first item
b - second item
Returns:
result type
Throws:
XQException - evaluation exception

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

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Enum<Calc>

info

public java.lang.String info()
Returns a string representation of the operator.

Returns:
string