org.mapdb.serializer

Class SerializerStringDelta2

java.lang.Object

org.mapdb.serializer.SerializerStringDelta2

All Implemented Interfaces:

java.util.Comparator<java.lang.String>, Serializer<java.lang.String>, GroupSerializer<java.lang.String>

public class SerializerStringDelta2
extends java.lang.Object
implements GroupSerializer<java.lang.String>

Created by jan on 2/29/16.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SerializerStringDelta2.ByteArrayKeys
static class	SerializerStringDelta2.CharArrayKeys
static interface	SerializerStringDelta2.StringArrayKeys

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
SerializerStringDelta2()

Method Summary

Modifier and Type	Method and Description
java.lang.String	deserialize(DataInput2 input, int available) Deserializes and returns the content of the given DataInput2.
int	hashCode(java.lang.String s, 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.lang.String value) Serializes the content of the given value into the given DataOutput2.
SerializerStringDelta2.StringArrayKeys	valueArrayCopyOfRange(java.lang.Object vals, int from, int to)
SerializerStringDelta2.StringArrayKeys	valueArrayDeleteValue(java.lang.Object vals, int pos)
SerializerStringDelta2.StringArrayKeys	valueArrayDeserialize(DataInput2 in2, int size)
SerializerStringDelta2.StringArrayKeys	valueArrayEmpty()
SerializerStringDelta2.StringArrayKeys	valueArrayFromArray(java.lang.Object[] keys)
java.lang.String	valueArrayGet(java.lang.Object vals, int pos)
java.lang.Object	valueArrayPut(java.lang.Object vals, int pos, java.lang.String newValue)
int	valueArraySearch(java.lang.Object keys, java.lang.String key)
int	valueArraySearch(java.lang.Object keys, java.lang.String key, java.util.Comparator comparator)
void	valueArraySerialize(DataOutput2 out, java.lang.Object vals)
int	valueArraySize(java.lang.Object vals)
SerializerStringDelta2.StringArrayKeys	valueArrayUpdateVal(java.lang.Object vals, int pos, java.lang.String 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, equals, fixedSize, 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

SerializerStringDelta2

public SerializerStringDelta2()

Method Detail

valueArrayDeserialize

public SerializerStringDelta2.StringArrayKeys valueArrayDeserialize(DataInput2 in2,
                                                                    int size)
                                                             throws java.io.IOException

Specified by:

valueArrayDeserialize in interface GroupSerializer<java.lang.String>

Throws:

java.io.IOException

valueArraySerialize

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

Specified by:

valueArraySerialize in interface GroupSerializer<java.lang.String>

Throws:

java.io.IOException

valueArrayCopyOfRange

public SerializerStringDelta2.StringArrayKeys valueArrayCopyOfRange(java.lang.Object vals,
                                                                    int from,
                                                                    int to)

Specified by:

valueArrayCopyOfRange in interface GroupSerializer<java.lang.String>

valueArrayDeleteValue

public SerializerStringDelta2.StringArrayKeys valueArrayDeleteValue(java.lang.Object vals,
                                                                    int pos)

Specified by:

valueArrayDeleteValue in interface GroupSerializer<java.lang.String>

valueArrayEmpty

public SerializerStringDelta2.StringArrayKeys valueArrayEmpty()

Specified by:

valueArrayEmpty in interface GroupSerializer<java.lang.String>

valueArrayFromArray

public SerializerStringDelta2.StringArrayKeys valueArrayFromArray(java.lang.Object[] keys)

Specified by:

valueArrayFromArray in interface GroupSerializer<java.lang.String>

valueArrayGet

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

Specified by:

valueArrayGet in interface GroupSerializer<java.lang.String>

valueArrayPut

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

Specified by:

valueArrayPut in interface GroupSerializer<java.lang.String>

valueArraySearch

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

Specified by:

valueArraySearch in interface GroupSerializer<java.lang.String>

valueArraySearch

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

Specified by:

valueArraySearch in interface GroupSerializer<java.lang.String>

valueArraySize

public int valueArraySize(java.lang.Object vals)

Specified by:

valueArraySize in interface GroupSerializer<java.lang.String>

valueArrayUpdateVal

public SerializerStringDelta2.StringArrayKeys valueArrayUpdateVal(java.lang.Object vals,
                                                                  int pos,
                                                                  java.lang.String newValue)

Specified by:

valueArrayUpdateVal in interface GroupSerializer<java.lang.String>

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.lang.String>

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

serialize

public void serialize(@NotNull
                      DataOutput2 out,
                      @NotNull
                      java.lang.String 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.lang.String>

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.lang.String deserialize(@NotNull
                                    DataInput2 input,
                                    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.lang.String>

Parameters:

input - 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

hashCode

public int hashCode(@NotNull
                    java.lang.String s,
                    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.lang.String>

Parameters:

s - an object

seed - used to "scramble" the

Returns:

a hash code of a non-null argument

See Also:

Object.hashCode()