jdbm.helper
Class RecordManagerImpl

java.lang.Object
  jdbm.helper.RecordManagerImpl

All Implemented Interfaces:

RecordManager

Direct Known Subclasses:

BaseRecordManager, CacheRecordManager

public abstract class RecordManagerImpl
extends java.lang.Object
implements RecordManager

Abstract class for record manager which implements most of stuff

Author:

Jan Kotek

Field Summary

Fields inherited from interface jdbm.RecordManager

NULL_RECID

Constructor Summary

RecordManagerImpl()

Method Summary

java.lang.Object	fetch(long recid) Fetches a record using standard java object serialization.
<K,V> PrimaryHashMap<K,V>	hashMap(java.lang.String name) Creates or load existing Primary Hash Map which persists data into DB.
long	insert(java.lang.Object obj) Inserts a new record using standard java object serialization.
<V> PrimaryStoreMap<java.lang.Long,V>	storeMap(java.lang.String name) Creates or load existing Primary StoreMap which persists data into DB.
<V> PrimaryStoreMap<java.lang.Long,V>	storeMap(java.lang.String name, Serializer<V> valueSerializer) Creates or load existing StoreMap which persists data into DB.
<K extends java.lang.Comparable,V> PrimaryTreeMap<K,V>	treeMap(java.lang.String name) Creates or load existing Primary TreeMap which persists data into DB.
<K,V> PrimaryTreeMap<K,V>	treeMap(java.lang.String name, java.util.Comparator<K> keyComparator) Creates or load existing TreeMap which persists data into DB.
<K,V> PrimaryTreeMap<K,V>	treeMap(java.lang.String name, java.util.Comparator<K> keyComparator, Serializer<V> valueSerializer) Creates or load existing TreeMap which persists data into DB.
<K,V> PrimaryTreeMap<K,V>	treeMap(java.lang.String name, java.util.Comparator<K> keyComparator, Serializer<V> valueSerializer, Serializer<K> keySerializer) Creates or load existing TreeMap which persists data into DB.
<K extends java.lang.Comparable,V> PrimaryTreeMap<K,V>	treeMap(java.lang.String name, Serializer<V> valueSerializer) Creates or load existing TreeMap which persists data into DB.
<K extends java.lang.Comparable,V> PrimaryTreeMap<K,V>	treeMap(java.lang.String name, Serializer<V> valueSerializer, Serializer<K> keySerializer) Creates or load existing TreeMap which persists data into DB.
void	update(long recid, java.lang.Object obj) Updates a record using standard java object serialization.

Methods inherited from class java.lang.Object

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

Methods inherited from interface jdbm.RecordManager

clearCache, close, commit, defrag, delete, fetch, fetch, getNamedObject, insert, rollback, setNamedObject, update

Constructor Detail

RecordManagerImpl

public RecordManagerImpl()

Method Detail

hashMap

public <K,V> PrimaryHashMap<K,V> hashMap(java.lang.String name)

Description copied from interface: RecordManager

Creates or load existing Primary Hash Map which persists data into DB.

Specified by:

hashMap in interface RecordManager

Type Parameters:

K - Key type

V - Value type

Parameters:

name - record name

Returns:

treeMap

public <K extends java.lang.Comparable,V> PrimaryTreeMap<K,V> treeMap(java.lang.String name)

Description copied from interface: RecordManager

Creates or load existing Primary TreeMap which persists data into DB.

Specified by:

treeMap in interface RecordManager

Type Parameters:

K - Key type

V - Value type

Parameters:

name - record name

Returns:

treeMap

public <K extends java.lang.Comparable,V> PrimaryTreeMap<K,V> treeMap(java.lang.String name,
                                                                      Serializer<V> valueSerializer)

Description copied from interface: RecordManager

Creates or load existing TreeMap which persists data into DB.

Specified by:

treeMap in interface RecordManager

Type Parameters:

K - Key type

V - Value type

Parameters:

name - record name

valueSerializer - Serializer used for values. This may reduce disk space usage.

Returns:

treeMap

public <K extends java.lang.Comparable,V> PrimaryTreeMap<K,V> treeMap(java.lang.String name,
                                                                      Serializer<V> valueSerializer,
                                                                      Serializer<K> keySerializer)

Description copied from interface: RecordManager

Creates or load existing TreeMap which persists data into DB.

Specified by:

treeMap in interface RecordManager

Type Parameters:

K - Key type

V - Value type

Parameters:

name - record name

valueSerializer - Serializer used for values. This may reduce disk space usage.

keySerializer - Serializer used for keys. This may reduce disk space usage.

Returns:

treeMap

public <K,V> PrimaryTreeMap<K,V> treeMap(java.lang.String name,
                                         java.util.Comparator<K> keyComparator)

Description copied from interface: RecordManager

Creates or load existing TreeMap which persists data into DB.

Specified by:

treeMap in interface RecordManager

Type Parameters:

K - Key type

V - Value type

Parameters:

name - record name

keyComparator - Comparator used to sort keys

Returns:

treeMap

public <K,V> PrimaryTreeMap<K,V> treeMap(java.lang.String name,
                                         java.util.Comparator<K> keyComparator,
                                         Serializer<V> valueSerializer)

Description copied from interface: RecordManager

Creates or load existing TreeMap which persists data into DB.

Specified by:

treeMap in interface RecordManager

Type Parameters:

K - Key type

V - Value type

Parameters:

name - record name

keyComparator - Comparator used to sort keys

valueSerializer - Serializer used for values. This may reduce disk space usage

Returns:

treeMap

public <K,V> PrimaryTreeMap<K,V> treeMap(java.lang.String name,
                                         java.util.Comparator<K> keyComparator,
                                         Serializer<V> valueSerializer,
                                         Serializer<K> keySerializer)

Description copied from interface: RecordManager

Creates or load existing TreeMap which persists data into DB.

Specified by:

treeMap in interface RecordManager

Type Parameters:

K - Key type

V - Value type

Parameters:

name - record name

keyComparator - Comparator used to sort keys

valueSerializer - Serializer used for values. This may reduce disk space usage

keySerializer - Serializer used for keys. This may reduce disk space usage *

Returns:

storeMap

public <V> PrimaryStoreMap<java.lang.Long,V> storeMap(java.lang.String name,
                                                      Serializer<V> valueSerializer)

Description copied from interface: RecordManager

Creates or load existing StoreMap which persists data into DB.

Specified by:

storeMap in interface RecordManager

Type Parameters:

V - Value type

Parameters:

name - record name

valueSerializer - Serializer used for values. This may reduce disk space usage

Returns:

map

storeMap

public <V> PrimaryStoreMap<java.lang.Long,V> storeMap(java.lang.String name)

Description copied from interface: RecordManager

Creates or load existing Primary StoreMap which persists data into DB.

Specified by:

storeMap in interface RecordManager

Type Parameters:

V - Value type

Parameters:

name - record name

Returns:

map

update

public void update(long recid,
                   java.lang.Object obj)
            throws java.io.IOException

Description copied from interface: RecordManager

Updates a record using standard java object serialization.

Specified by:

update in interface RecordManager

Parameters:

recid - the recid for the record that is to be updated.

obj - the new object for the record.

Throws:

java.io.IOException - when one of the underlying I/O operations fails or given recid does not exists.

fetch

public java.lang.Object fetch(long recid)
                       throws java.io.IOException

Description copied from interface: RecordManager

Fetches a record using standard java object serialization. If given recid does not exist, IOException will be thrown before/during commit (cache).

Specified by:

fetch in interface RecordManager

Parameters:

recid - the recid for the record that must be fetched.

Returns:

the object contained in the record, null if given recid does not exist

Throws:

java.io.IOException - when one of the underlying I/O operations fails.

insert

public long insert(java.lang.Object obj)
            throws java.io.IOException

Description copied from interface: RecordManager

Inserts a new record using standard java object serialization.

Specified by:

insert in interface RecordManager

Parameters:

obj - the object for the new record.

Returns:

the rowid for the new record.

Throws:

java.io.IOException - when one of the underlying I/O operations fails.