Package org.apache.lucene.search

Enum SortField.Type

java.lang.Object

java.lang.Enum<SortField.Type>

org.apache.lucene.search.SortField.Type

All Implemented Interfaces:

Serializable, Comparable<SortField.Type>

Enclosing class:

SortField

public static enum SortField.Type
extends Enum<SortField.Type>

Specifies the type of the terms to be sorted, or special types such as CUSTOM

Enum Constant Summary

Enum Constants

Enum Constant	Description
CUSTOM	Sort using a custom Comparator.
DOC	Sort by document number (index order).
DOUBLE	Sort using term values as encoded Doubles.
FLOAT	Sort using term values as encoded Floats.
INT	Sort using term values as encoded Integers.
LONG	Sort using term values as encoded Longs.
REWRITEABLE	Force rewriting of SortField using SortField.rewrite(IndexSearcher) before it can be used for sorting
SCORE	Sort by document score (relevance).
STRING	Sort using term values as Strings.
STRING_VAL	Sort using term values as Strings, but comparing by value (using String.compareTo) for all comparisons.

Method Summary

Modifier and Type	Method	Description
static SortField.Type	valueOf(String name)	Returns the enum constant of this type with the specified name.
static SortField.Type[]	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, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SCORE

public static final SortField.Type SCORE

Sort by document score (relevance). Sort values are Float and higher values are at the front.

DOC

public static final SortField.Type DOC

Sort by document number (index order). Sort values are Integer and lower values are at the front.

STRING

public static final SortField.Type STRING

Sort using term values as Strings. Sort values are String and lower values are at the front.

INT

public static final SortField.Type INT

Sort using term values as encoded Integers. Sort values are Integer and lower values are at the front. Fields must either be not indexed, or indexed with IntPoint.

FLOAT

public static final SortField.Type FLOAT

Sort using term values as encoded Floats. Sort values are Float and lower values are at the front. Fields must either be not indexed, or indexed with FloatPoint.

LONG

public static final SortField.Type LONG

Sort using term values as encoded Longs. Sort values are Long and lower values are at the front. Fields must either be not indexed, or indexed with LongPoint.

DOUBLE

public static final SortField.Type DOUBLE

Sort using term values as encoded Doubles. Sort values are Double and lower values are at the front. Fields must either be not indexed, or indexed with DoublePoint.

CUSTOM

public static final SortField.Type CUSTOM

Sort using a custom Comparator. Sort values are any Comparable and sorting is done according to natural order.

STRING_VAL

public static final SortField.Type STRING_VAL

Sort using term values as Strings, but comparing by value (using String.compareTo) for all comparisons. This is typically slower than STRING, which uses ordinals to do the sorting.

REWRITEABLE

public static final SortField.Type REWRITEABLE

Force rewriting of SortField using SortField.rewrite(IndexSearcher) before it can be used for sorting

Method Detail

values

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

Returns:

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

valueOf

public static SortField.Type 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