Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.expressions

Class ForUpdateClause

java.lang.Object

org.eclipse.persistence.internal.expressions.ForUpdateClause

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

ForUpdateOfClause

public class ForUpdateClause
extends Object
implements Serializable, Cloneable

Purpose:Represents The FOR UPDATE pessimistically locking clause.

Since:

Oracle Toplink 10g AS

Author:

Stephen McRitchie

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static ForUpdateClause	NO_LOCK_CLAUSE

Constructor Summary

Constructors

Constructor	Description
ForUpdateClause()
ForUpdateClause(short lockMode)
ForUpdateClause(Integer waitTimeout)

Method Summary

Modifier and Type	Method	Description
Object	clone()
Collection	getAliasesOfTablesToBeLocked(SQLSelectStatement statement)	INTERNAL: Returns collection of aliases of the tables to be locked.
short	getLockMode()
Integer	getWaitTimeout()
boolean	isForUpdateOfClause()
boolean	isReferenceClassLocked()
static ForUpdateClause	newInstance(short lockMode)
static ForUpdateClause	newInstance(Integer waitTimeout)
void	printSQL(ExpressionSQLPrinter printer, SQLSelectStatement statement)	INTERNAL: Prints the as of clause for an expression inside of the FROM clause.

Methods inherited from class java.lang.Object

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

Field Detail

NO_LOCK_CLAUSE

protected static final ForUpdateClause NO_LOCK_CLAUSE

Constructor Detail

ForUpdateClause

public ForUpdateClause()

ForUpdateClause

public ForUpdateClause(short lockMode)

ForUpdateClause

public ForUpdateClause(Integer waitTimeout)

Method Detail

clone

public Object clone()

Overrides:

clone in class Object

newInstance

public static ForUpdateClause newInstance(short lockMode)

newInstance

public static ForUpdateClause newInstance(Integer waitTimeout)

isForUpdateOfClause

public boolean isForUpdateOfClause()

isReferenceClassLocked

public boolean isReferenceClassLocked()

getLockMode

public short getLockMode()

getWaitTimeout

public Integer getWaitTimeout()

printSQL

public void printSQL(ExpressionSQLPrinter printer,
                     SQLSelectStatement statement)

INTERNAL: Prints the as of clause for an expression inside of the FROM clause.

getAliasesOfTablesToBeLocked

public Collection getAliasesOfTablesToBeLocked(SQLSelectStatement statement)

INTERNAL: Returns collection of aliases of the tables to be locked. Only used by platforms that lock tables individually in FROM clause (platform.shouldPrintLockingClauseAfterWhereClause()==false) like SQLServer