Module openj9.dtfj

Package com.ibm.j9ddr.vm29.j9

Class HashTable<StructType extends AbstractPointer>

java.lang.Object

com.ibm.j9ddr.vm29.j9.HashTable<StructType>

All Implemented Interfaces:

IHashTable<StructType>

Direct Known Subclasses:

HashTable_V1

public abstract class HashTable<StructType extends AbstractPointer>
extends Object
implements IHashTable<StructType>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	HashTable.HashEqualFunction<StructType>	Encapsulation of the equal function needed by the HashTable
static interface	HashTable.HashFunction<StructType>	Encapsulation of the hash function needed by the HashTable

Field Summary

Fields

Modifier and Type	Field	Description
protected com.ibm.j9ddr.vm29.j9.HashTable.HashComparatorFunction<StructType>	_comparatorFn
protected HashTable.HashEqualFunction<StructType>	_equalFn
protected HashTable.HashFunction<StructType>	_hashFn
protected Class<StructType>	_structType
protected com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer	_table

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	HashTable(com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer structure, Class<StructType> structType, HashTable.HashEqualFunction<StructType> equalFn, HashTable.HashFunction<StructType> hashFn, com.ibm.j9ddr.vm29.j9.HashTable.HashComparatorFunction<StructType> comparatorFn)

Method Summary

Modifier and Type	Method	Description
abstract StructType	find(StructType entry)	Find an entry in the hash table.
static <T extends AbstractPointer> HashTable<T>	fromJ9HashTable(com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer structure, boolean isInline, Class<T> structType, HashTable.HashEqualFunction<T> equalFn, HashTable.HashFunction<T> hashFn)	Factory method to construct an appropriate hashtable handler.
static <T extends AbstractPointer> HashTable<T>	fromJ9HashTable(com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer structure, boolean isInline, Class<T> structType, HashTable.HashFunction<T> hashFn, com.ibm.j9ddr.vm29.j9.HashTable.HashComparatorFunction<T> comparatorFn)	Factory method to construct an appropriate hashtable handler.
abstract long	getCount()	Returns the number of elements in a given pool.
abstract String	getTableName()	Returns the name of the table
abstract SlotIterator<StructType>	iterator()	Returns an iterator over the elements in the pool

Methods declared in class java.lang.Object

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

Field Detail

_table

protected com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer _table

_structType

protected Class<StructType extends AbstractPointer> _structType

_equalFn

protected HashTable.HashEqualFunction<StructType extends AbstractPointer> _equalFn

_hashFn

protected HashTable.HashFunction<StructType extends AbstractPointer> _hashFn

_comparatorFn

protected com.ibm.j9ddr.vm29.j9.HashTable.HashComparatorFunction<StructType extends AbstractPointer> _comparatorFn

Constructor Detail

HashTable

protected HashTable(com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer structure,
                    Class<StructType> structType,
                    HashTable.HashEqualFunction<StructType> equalFn,
                    HashTable.HashFunction<StructType> hashFn,
                    com.ibm.j9ddr.vm29.j9.HashTable.HashComparatorFunction<StructType> comparatorFn)
             throws CorruptDataException

Throws:

CorruptDataException

Method Detail

fromJ9HashTable

public static <T extends AbstractPointer> HashTable<T> fromJ9HashTable(com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer structure,
                                                                       boolean isInline,
                                                                       Class<T> structType,
                                                                       HashTable.HashEqualFunction<T> equalFn,
                                                                       HashTable.HashFunction<T> hashFn)
                                                                throws CorruptDataException

Factory method to construct an appropriate hashtable handler.

Type Parameters:

T -

Parameters:

structure - the J9HashTable structure to use

structType - the element type

equalFn - the equal function

hashFn - the hash function

Returns:

an instance of HashTable

Throws:

CorruptDataException

fromJ9HashTable

public static <T extends AbstractPointer> HashTable<T> fromJ9HashTable(com.ibm.j9ddr.vm29.pointer.generated.J9HashTablePointer structure,
                                                                       boolean isInline,
                                                                       Class<T> structType,
                                                                       HashTable.HashFunction<T> hashFn,
                                                                       com.ibm.j9ddr.vm29.j9.HashTable.HashComparatorFunction<T> comparatorFn)
                                                                throws CorruptDataException

Factory method to construct an appropriate hashtable handler.

Type Parameters:

T -

Parameters:

structure - the J9HashTable structure to use

structType - the element type

equalFn - the equal function

hashFn - the hash function

Returns:

an instance of HashTable

Throws:

CorruptDataException

getTableName

public abstract String getTableName()

Returns the name of the table

Specified by:

getTableName in interface IHashTable<StructType extends AbstractPointer>

Returns:

the number of elements in the pool

getCount

public abstract long getCount()

Returns the number of elements in a given pool.

Specified by:

getCount in interface IHashTable<StructType extends AbstractPointer>

Returns:

the number of elements in the pool

find

public abstract StructType find(StructType entry)
                         throws CorruptDataException

Find an entry in the hash table.

Parameters:

entry -

Returns:

NULL if entry is not present in the table; otherwise a pointer to the user-data

Throws:

CorruptDataException

iterator

public abstract SlotIterator<StructType> iterator()

Returns an iterator over the elements in the pool

Specified by:

iterator in interface IHashTable<StructType extends AbstractPointer>

Returns:

an Iterator