Package com.norconex.commons.lang

Enum Operator

java.lang.Object

java.lang.Enum<Operator>

com.norconex.commons.lang.Operator

All Implemented Interfaces:

Serializable, Comparable<Operator>

public enum Operator
extends Enum<Operator>

Operators used by a few conditions based on comparable values (e.g., numbers, dates, etc.). Facilitates specifying/parsing such operators as strings

Textual representation:

Operators can be parsed using symbols or text abbreviations. Text abbreviations are useful when you do now want to concern yourself when used in XML. Possible representations are:

Symbol	Abbreviation	Meaning
>	gt	greater than
>=, =>	ge	greater equal
<	lt	lower than
<=, =<	le	lowe equal
=, ==	eq,is	equals

Since:

2.0.0

Author:

Pascal Essiembre

Enum Constant Summary

Enum Constants

Enum Constant	Description
EQUALS
GREATER_EQUAL
GREATER_THAN
LOWER_EQUAL
LOWER_THAN

Method Summary

Modifier and Type	Method	Description
abstract <T extends Comparable<T>> boolean	evaluate(T first, T second)
static Operator	of(String op)
String	toString()
static Operator	valueOf(String name)	Returns the enum constant of this type with the specified name.
static Operator[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

GREATER_THAN

public static final Operator GREATER_THAN

GREATER_EQUAL

public static final Operator GREATER_EQUAL

EQUALS

public static final Operator EQUALS

LOWER_EQUAL

public static final Operator LOWER_EQUAL

LOWER_THAN

public static final Operator LOWER_THAN

Method Detail

values

public static Operator[] 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 (Operator c : Operator.values())
    System.out.println(c);

Returns:

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

valueOf

public static Operator valueOf(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:

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

NullPointerException - if the argument is null

of

public static Operator of(String op)

toString

public String toString()

Overrides:

toString in class Enum<Operator>

evaluate

public abstract <T extends Comparable<T>> boolean evaluate(T first,
                                                           T second)