com.orientechnologies.orient.core.metadata.security

Class OPredicateCache

java.lang.Object

com.orientechnologies.orient.core.metadata.security.OPredicateCache

public class OPredicateCache
extends Object

This class is an LRU cache for already parsed SQL statement executors. It stores itself in the storage as a resource. It also acts an an entry point for the SQL parser.

Author:

Luigi Dell'Aquila (l.dellaquila-(at)-orientdb.com)

Constructor Summary

Constructors

Constructor and Description
OPredicateCache(int size)

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	contains(String statement)
OOrBlock	get(String statement)
protected static OOrBlock	parse(String statement)

Methods inherited from class java.lang.Object

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

Constructor Detail

OPredicateCache

public OPredicateCache(int size)

Parameters:

size - the size of the cache

Method Detail

contains

public boolean contains(String statement)

Parameters:

statement - an SQL statement

Returns:

true if the corresponding executor is present in the cache

get

public OOrBlock get(String statement)

Parameters:

statement - an SQL statement

Returns:

the corresponding executor, taking it from the internal cache, if it exists

parse

protected static OOrBlock parse(String statement)
                         throws OCommandSQLParsingException

Throws:

OCommandSQLParsingException

clear

public void clear()