org.apache.geode.cache.query

Enum IndexType

java.lang.Object

java.lang.Enum<IndexType>

org.apache.geode.cache.query.IndexType

All Implemented Interfaces:

Serializable, Comparable<IndexType>

Deprecated.

As of 6.6.1. Check QueryService for changes. Enumerated type for types of indexes

@Deprecated
public enum IndexType
extends Enum<IndexType>

Since:

GemFire 4.0

Enum Constant Summary

Enum Constants

Enum Constant and Description
FUNCTIONAL Deprecated. The index type of a functional index.
HASH Deprecated. Due to the overhead caused by rehashing while expanding the backing array, hash index has been deprecated since Apache Geode 1.4.0. Use FUNCTIONAL instead.
PRIMARY_KEY Deprecated. The index type of a primary key index.

Method Summary

Modifier and Type	Method and Description
String	getName() Deprecated.
static IndexType	valueOf(String name) Deprecated. Returns the enum constant of this type with the specified name.
static IndexType	valueOfSynonym(String name) Deprecated.
static IndexType[]	values() Deprecated. 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

FUNCTIONAL

public static final IndexType FUNCTIONAL

Deprecated.

The index type of a functional index. A functional index is used for the comparison of some function of a region value with a constant, using a relational operator. The indexedExpression yields a value that is a Comparable. The "constant" that it is to be compared to is any expression that is not dependent on a value in the region. A simple example is an index on the indexedExpression "age". This would be used for a query that has the where clause "age < 55".

The indexedExpression for a functional index can be any Comparable or any of the following primitive types:
long int short byte char float double

See Also:

QueryService.createIndex(String, IndexType, String, String)

HASH

@Deprecated
public static final IndexType HASH

Deprecated. Due to the overhead caused by rehashing while expanding the backing array, hash index has been deprecated since Apache Geode 1.4.0. Use FUNCTIONAL instead.

The index type of a hash index. A hash index is used for the comparison of some function of a region value with a constant, using a relational operator. The indexedExpression yields a value that is a Comparable. The "constant" that it is to be compared to is any expression that is not dependent on a value in the region. A simple example is an index on the indexedExpression "age". This would be used for a query that has the where clause "age = 55".

The indexedExpression for a hash index can be any Comparable or any of the following primitive types:
long int short byte char float double

See Also:

QueryService.createIndex(String, IndexType, String, String)

PRIMARY_KEY

public static final IndexType PRIMARY_KEY

Deprecated.

The index type of a primary key index. A primary key index uses the keys in the region itself. By creating a primary key index, you make the query service aware of the relationship between the values in the region and the keys in the region and enable the relationship to be used to optimize the execution of queries. For example, if the values in a region are employee objects and the keys in the region is the attribute empId on those employees, then you can create a primary key index on that region with the indexedExpression "empId".

The type of the indexedExpression for a primary key index can be any object type. Just as in a Region, the lookup is based on the implementation of the equals and hashCode methods in the object.

See Also:

QueryService.createIndex(String, IndexType, String, String)

Method Detail

values

public static IndexType[] values()

Deprecated.

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 (IndexType c : IndexType.values())
    System.out.println(c);

Returns:

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

valueOf

public static IndexType valueOf(String name)

Deprecated.

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

getName

public String getName()

Deprecated.

valueOfSynonym

public static IndexType valueOfSynonym(String name)

Deprecated.