Package io.permazen.core.util

Class GeneratedIdCache

java.lang.Object

io.permazen.core.util.GeneratedIdCache

@ThreadSafe
public class GeneratedIdCache
extends Object

Cache for randomly generated object IDs based on unique strings.

Instances are thread safe.

See Also:

• XMLObjectSerializer

Constructor Summary

Constructors

Constructor	Description
GeneratedIdCache()

Method Summary

Modifier and Type	Method	Description
void	clear()	Clear this instance.
ObjId	getGeneratedId(Transaction tx, String typeName, String string)	Generate an object ID for the given object type name and string.

Methods inherited from class java.lang.Object

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

Constructor Details

GeneratedIdCache

public GeneratedIdCache()

Method Details

getGeneratedId

public ObjId getGeneratedId(Transaction tx,
 String typeName,
 String string)

Generate an object ID for the given object type name and string.

If an ObjId has already been created for the specified typeName and string by this instance, it will be returned. Otherwise, a random ObjId for which no object exists in the specified Transaction is generated and returned.

Parameters:

tx - transaction from which to allocate new object IDs

typeName - object type name

string - unique string

Returns:

unique, unallocated object ID corresponding to typeName and string

Throws:

IllegalArgumentException - if any parameter is null

clear

public void clear()

Clear this instance.