org.mapdb.serializer

Class SerializerUUID

java.lang.Object

org.mapdb.serializer.SerializerUUID

All Implemented Interfaces:

java.util.Comparator<java.util.UUID>, Serializer<java.util.UUID>, GroupSerializer<java.util.UUID>

public class SerializerUUID
extends java.lang.Object
implements GroupSerializer<java.util.UUID>

Created by jan on 2/28/16.

Field Summary

Fields inherited from interface org.mapdb.Serializer

BIG_DECIMAL, BIG_INTEGER, BOOLEAN, BYTE, BYTE_ARRAY, BYTE_ARRAY_DELTA, BYTE_ARRAY_DELTA2, BYTE_ARRAY_NOSIZE, CHAR, CHAR_ARRAY, CLASS, DATE, DOUBLE, DOUBLE_ARRAY, ELSA, FLOAT, FLOAT_ARRAY, ILLEGAL_ACCESS, INT_ARRAY, INTEGER, INTEGER_DELTA, INTEGER_PACKED, JAVA, LONG, LONG_ARRAY, LONG_DELTA, LONG_PACKED, RECID, RECID_ARRAY, SHORT, SHORT_ARRAY, STRING, STRING_ASCII, STRING_DELTA, STRING_DELTA2, STRING_INTERN, STRING_NOSIZE, STRING_ORIGHASH, UUID

Constructor Summary

Constructors

Constructor and Description
SerializerUUID()

Method Summary

Modifier and Type	Method and Description
java.util.UUID	deserialize(DataInput2 in, int available) Deserializes and returns the content of the given DataInput2.
boolean	equals(java.util.UUID a1, java.util.UUID a2) Returns if the first and second arguments are equal to each other.
int	fixedSize() Returns the fixed size of the serialized form in bytes or -1 if the size is not fixed (e.g.
int	hashCode(java.util.UUID uuid, int seed) Returns a hash code of a given non-null argument.
boolean	isTrusted() Returns if this Serializer is trusted to always read the same number of bytes as it writes for any given object being serialized/de-serialized.
void	serialize(DataOutput2 out, java.util.UUID value) Serializes the content of the given value into the given DataOutput2.
java.lang.Object	valueArrayCopyOfRange(java.lang.Object vals, int from, int to)
java.lang.Object	valueArrayDeleteValue(java.lang.Object vals, int pos)
java.lang.Object	valueArrayDeserialize(DataInput2 in, int size)
java.lang.Object	valueArrayEmpty()
java.lang.Object	valueArrayFromArray(java.lang.Object[] objects)
java.util.UUID	valueArrayGet(java.lang.Object vals, int pos)
java.lang.Object	valueArrayPut(java.lang.Object vals, int pos, java.util.UUID newValue)
int	valueArraySearch(java.lang.Object keys, java.util.UUID key)
int	valueArraySearch(java.lang.Object keys, java.util.UUID key, java.util.Comparator comparator)
void	valueArraySerialize(DataOutput2 out, java.lang.Object vals)
int	valueArraySize(java.lang.Object vals)
java.lang.Object	valueArrayUpdateVal(java.lang.Object vals, int pos, java.util.UUID newValue)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mapdb.serializer.GroupSerializer

nextValue, valueArrayBinaryGet, valueArrayBinarySearch, valueArrayToArray

Methods inherited from interface org.mapdb.Serializer

clone, compare, deserializeFromLong, needsAvailableSizeHint

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

SerializerUUID

public SerializerUUID()

Method Detail

serialize

public void serialize(DataOutput2 out,
                      java.util.UUID value)
               throws java.io.IOException

Description copied from interface: Serializer

Serializes the content of the given value into the given DataOutput2.

Specified by:

serialize in interface Serializer<java.util.UUID>

Parameters:

out - DataOutput2 to save object into

value - Object to serialize

Throws:

java.io.IOException - in case of an I/O error

deserialize

public java.util.UUID deserialize(DataInput2 in,
                                  int available)
                           throws java.io.IOException

Description copied from interface: Serializer

Deserializes and returns the content of the given DataInput2.

Specified by:

deserialize in interface Serializer<java.util.UUID>

Parameters:

in - DataInput2 to de-serialize data from

available - how many bytes that are available in the DataInput2 for reading, may be -1 (in streams) or 0 (null).

Returns:

the de-serialized content of the given DataInput2

Throws:

java.io.IOException - in case of an I/O error

fixedSize

public int fixedSize()

Description copied from interface: Serializer

Returns the fixed size of the serialized form in bytes or -1 if the size is not fixed (e.g. for Strings).

Some optimizations can be applied to serializers with a fixed size.

Specified by:

fixedSize in interface Serializer<java.util.UUID>

Returns:

the fixed size of the serialized form in bytes or -1 if the size is not fixed

isTrusted

public boolean isTrusted()

Description copied from interface: Serializer

Returns if this Serializer is trusted to always read the same number of bytes as it writes for any given object being serialized/de-serialized.

MapDB has a relaxed record size boundary checking. It expects deserializers to read exactly as many bytes as were written during serialization. If a deserializer reads more bytes than it wrote, it might start reading others record data in store.

Some serializers (Kryo) have problems with this. To prevent this, we can not read data directly from a store, but we must copy them into separate byte[] buffers. Thus, zero-copy optimizations are disabled by default, but can be explicitly enabled here by letting this method return true.

This flag indicates if this serializer was 'verified' to read as many bytes as it writes. It should also be much better tested etc.

Specified by:

isTrusted in interface Serializer<java.util.UUID>

Returns:

if this Serializer is trusted to always read the same number of bytes as it writes for any given object being serialized/de-serialized

equals

public boolean equals(java.util.UUID a1,
                      java.util.UUID a2)

Description copied from interface: Serializer

Returns if the first and second arguments are equal to each other. Consequently, if both arguments are null, true is returned and if exactly one argument is null, false is returned.

Specified by:

equals in interface Serializer<java.util.UUID>

Parameters:

a1 - an object

a2 - another object to be compared with the first object for equality

Returns:

if the first and second arguments are equal to each other

See Also:

Object.equals(Object)

hashCode

public int hashCode(java.util.UUID uuid,
                    int seed)

Description copied from interface: Serializer

Returns a hash code of a given non-null argument. The output of the method is affected by the given seed, allowing protection against crafted hash attacks and to provide a better distribution of hashes.

Specified by:

hashCode in interface Serializer<java.util.UUID>

Parameters:

uuid - an object

seed - used to "scramble" the

Returns:

a hash code of a non-null argument

See Also:

Object.hashCode()

valueArraySearch

public int valueArraySearch(java.lang.Object keys,
                            java.util.UUID key)

Specified by:

valueArraySearch in interface GroupSerializer<java.util.UUID>

valueArraySearch

public int valueArraySearch(java.lang.Object keys,
                            java.util.UUID key,
                            java.util.Comparator comparator)

Specified by:

valueArraySearch in interface GroupSerializer<java.util.UUID>

valueArraySerialize

public void valueArraySerialize(DataOutput2 out,
                                java.lang.Object vals)
                         throws java.io.IOException

Specified by:

valueArraySerialize in interface GroupSerializer<java.util.UUID>

Throws:

java.io.IOException

valueArrayDeserialize

public java.lang.Object valueArrayDeserialize(DataInput2 in,
                                              int size)
                                       throws java.io.IOException

Specified by:

valueArrayDeserialize in interface GroupSerializer<java.util.UUID>

Throws:

java.io.IOException

valueArrayGet

public java.util.UUID valueArrayGet(java.lang.Object vals,
                                    int pos)

Specified by:

valueArrayGet in interface GroupSerializer<java.util.UUID>

valueArraySize

public int valueArraySize(java.lang.Object vals)

Specified by:

valueArraySize in interface GroupSerializer<java.util.UUID>

valueArrayEmpty

public java.lang.Object valueArrayEmpty()

Specified by:

valueArrayEmpty in interface GroupSerializer<java.util.UUID>

valueArrayPut

public java.lang.Object valueArrayPut(java.lang.Object vals,
                                      int pos,
                                      java.util.UUID newValue)

Specified by:

valueArrayPut in interface GroupSerializer<java.util.UUID>

valueArrayUpdateVal

public java.lang.Object valueArrayUpdateVal(java.lang.Object vals,
                                            int pos,
                                            java.util.UUID newValue)

Specified by:

valueArrayUpdateVal in interface GroupSerializer<java.util.UUID>

valueArrayFromArray

public java.lang.Object valueArrayFromArray(java.lang.Object[] objects)

Specified by:

valueArrayFromArray in interface GroupSerializer<java.util.UUID>

valueArrayCopyOfRange

public java.lang.Object valueArrayCopyOfRange(java.lang.Object vals,
                                              int from,
                                              int to)

Specified by:

valueArrayCopyOfRange in interface GroupSerializer<java.util.UUID>

valueArrayDeleteValue

public java.lang.Object valueArrayDeleteValue(java.lang.Object vals,
                                              int pos)

Specified by:

valueArrayDeleteValue in interface GroupSerializer<java.util.UUID>