org.mapdb.serializer

Class SerializerStringNoSize

java.lang.Object

org.mapdb.serializer.SerializerStringNoSize

All Implemented Interfaces:

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

public class SerializerStringNoSize
extends java.lang.Object
implements Serializer<java.lang.String>

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
SerializerStringNoSize()

Method Summary

Modifier and Type	Method and Description
java.lang.String	deserialize(DataInput2 in, int available) Deserializes and returns the content of the given DataInput2.
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.
boolean	needsAvailableSizeHint() TODO: Document this method
void	serialize(DataOutput2 out, java.lang.String value) Serializes the content of the given value into the given DataOutput2.

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

clone, compare, deserializeFromLong, equals, fixedSize, hashCode

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

SerializerStringNoSize

public SerializerStringNoSize()

Method Detail

serialize

public void serialize(DataOutput2 out,
                      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(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.lang.String>

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

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

needsAvailableSizeHint

public boolean needsAvailableSizeHint()

Description copied from interface: Serializer

TODO: Document this method

Specified by:

needsAvailableSizeHint in interface Serializer<java.lang.String>

Returns: