org.mapdb

Class BTreeKeySerializer.BasicKeySerializer

java.lang.Object

org.mapdb.BTreeKeySerializer<Object,Object[]>

org.mapdb.BTreeKeySerializer.BasicKeySerializer

All Implemented Interfaces:

Serializable

Enclosing class:

BTreeKeySerializer<KEY,KEYS>

public static final class BTreeKeySerializer.BasicKeySerializer
extends BTreeKeySerializer<Object,Object[]>
implements Serializable

Basic Key Serializer which just writes data without applying any compression. Is used by default if no other Key Serializer is specified.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.mapdb.BTreeKeySerializer

BTreeKeySerializer.ArrayKeySerializer, BTreeKeySerializer.BasicKeySerializer, BTreeKeySerializer.ByteArrayKeys, BTreeKeySerializer.CharArrayKeys, BTreeKeySerializer.Compress, BTreeKeySerializer.StringArrayKeys

Field Summary

Fields

Modifier and Type	Field and Description
protected Comparator	comparator
protected Serializer	serializer

Fields inherited from class org.mapdb.BTreeKeySerializer

ARRAY2, ARRAY3, ARRAY4, BASIC, BYTE_ARRAY, BYTE_ARRAY2, INTEGER, LONG, STRING, STRING2, UUID, ZERO_OR_POSITIVE_INT, ZERO_OR_POSITIVE_LONG

Constructor Summary

Constructors

Constructor and Description
BTreeKeySerializer.BasicKeySerializer(Serializer serializer, Comparator comparator)

Method Summary

Methods

Modifier and Type	Method and Description
Object[]	arrayToKeys(Object[] keys)
Comparator	comparator()
int	compare(Object[] keys, int pos1, int pos2)
int	compare(Object[] keys, int pos, Object key)
Object[]	copyOfRange(Object[] keys, int from, int to)
Object[]	deleteKey(Object[] keys, int pos)
Object[]	deserialize(DataInput in, int nodeSize) Deserializes keys for single BTree Node.
Object[]	emptyKeys()
Object	getKey(Object[] keys, int pos)
int	length(Object[] keys)
Object[]	putKey(Object[] keys, int pos, Object newKey) expand keys array by one and put newKey at position pos
void	serialize(DataOutput out, Object[] keys) Serialize keys from single BTree Node.

Methods inherited from class org.mapdb.BTreeKeySerializer

commonPrefixLen, commonPrefixLen, compareIsSmaller, findChildren, findChildren2, isTrusted, keysToArray

Methods inherited from class java.lang.Object

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

Field Detail

serializer

protected final Serializer serializer

comparator

protected final Comparator comparator

Constructor Detail

BTreeKeySerializer.BasicKeySerializer

public BTreeKeySerializer.BasicKeySerializer(Serializer serializer,
                                     Comparator comparator)

Method Detail

serialize

public void serialize(DataOutput out,
             Object[] keys)
               throws IOException

Description copied from class: BTreeKeySerializer

Serialize keys from single BTree Node.

Specified by:

serialize in class BTreeKeySerializer<Object,Object[]>

Parameters:

out - output stream where to put ata

keys - An object which represents keys

Throws:

IOException - in case of an writting error

deserialize

public Object[] deserialize(DataInput in,
                   int nodeSize)
                     throws IOException

Description copied from class: BTreeKeySerializer

Deserializes keys for single BTree Node. To

Specified by:

deserialize in class BTreeKeySerializer<Object,Object[]>

Parameters:

in - input stream to read data from

nodeSize - number of keys in deserialized node

Returns:

an object which represents keys

Throws:

IOException - in case of an reading error

compare

public int compare(Object[] keys,
          int pos1,
          int pos2)

Specified by:

compare in class BTreeKeySerializer<Object,Object[]>

compare

public int compare(Object[] keys,
          int pos,
          Object key)

Specified by:

compare in class BTreeKeySerializer<Object,Object[]>

getKey

public Object getKey(Object[] keys,
            int pos)

Specified by:

getKey in class BTreeKeySerializer<Object,Object[]>

comparator

public Comparator comparator()

Specified by:

comparator in class BTreeKeySerializer<Object,Object[]>

emptyKeys

public Object[] emptyKeys()

Specified by:

emptyKeys in class BTreeKeySerializer<Object,Object[]>

length

public int length(Object[] keys)

Specified by:

length in class BTreeKeySerializer<Object,Object[]>

putKey

public Object[] putKey(Object[] keys,
              int pos,
              Object newKey)

Description copied from class: BTreeKeySerializer

expand keys array by one and put newKey at position pos

Specified by:

putKey in class BTreeKeySerializer<Object,Object[]>

Parameters:

keys - array of keys to put new key into

pos - of new key

newKey - new key to insert

Returns:

array of keys with new key at given position

arrayToKeys

public Object[] arrayToKeys(Object[] keys)

Specified by:

arrayToKeys in class BTreeKeySerializer<Object,Object[]>

copyOfRange

public Object[] copyOfRange(Object[] keys,
                   int from,
                   int to)

Specified by:

copyOfRange in class BTreeKeySerializer<Object,Object[]>

deleteKey

public Object[] deleteKey(Object[] keys,
                 int pos)

Specified by:

deleteKey in class BTreeKeySerializer<Object,Object[]>