com.goldencode.p2j.persist

Class FastFindCache.Key

java.lang.Object

com.goldencode.p2j.persist.FastFindCache.Key

Enclosing class:

FastFindCache

static class FastFindCache.Key
extends java.lang.Object

A special key used for accessing values in cache. Internally, it is compound from two private keys, one for each cache level. They are grouped together to simplify the external interface to a single entity instead of two.

Field Summary

Fields

Modifier and Type	Field and Description
private int	indexId The id of the index used when executing the query.
private FastFindCache.L2Key	k2 The key for the second level cache, composed of type of query (one of FIRST, LAST or UNIQUE constants of the QueryConstants, the optional FQL predicate used in query and the optional substitution values.
private long	tableId An computed value that uniquely identifies the DMO table and, in case temp-table the multiplex.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Key(RecordBuffer buffer, int indexId, java.lang.String fql, java.util.BitSet properties, int type, java.lang.Object[] values) Creates the immutable key object for accessing values in cache.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

tableId

private final long tableId

An computed value that uniquely identifies the DMO table and, in case temp-table the multiplex. It is composed from: the unique id of the DMO interface of the keyed record in lower 4 bytes and the optional multiplex number in the higher bits.

indexId

private final int indexId

The id of the index used when executing the query.

k2

private final FastFindCache.L2Key k2

The key for the second level cache, composed of type of query (one of FIRST, LAST or UNIQUE constants of the QueryConstants, the optional FQL predicate used in query and the optional substitution values.

Constructor Detail

Key

private Key(RecordBuffer buffer,
            int indexId,
            java.lang.String fql,
            java.util.BitSet properties,
            int type,
            java.lang.Object[] values)

Creates the immutable key object for accessing values in cache.

Parameters:

buffer - The buffer that holds the record. Used for obtaining the DMO uid and multiplex (for temp-tables).

indexId - The id of the index used when executing the query.

fql - The fql of the query which selected the keyed record.

properties - The set of properties used in fql.

type - The type of navigation. Must be one of FIRST, LAST or UNIQUE values of the QueryConstants.

values - The substitution values. May be null.