org.mapdb

Class SerializerBase

java.lang.Object

org.mapdb.SerializerBase

All Implemented Interfaces:

Serializer<java.lang.Object>

Direct Known Subclasses:

SerializerPojo

public class SerializerBase
extends java.lang.Object
implements Serializer<java.lang.Object>

Serializer which uses 'header byte' to serialize/deserialize most of classes from 'java.lang' and 'java.util' packages.

Author:

Jan Kotek

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	SerializerBase.FastArrayList<K> Utility class similar to ArrayList, but with fast identity search.
protected static interface	SerializerBase.Header Header byte, is used at start of each record to indicate data type WARNING !!! values bellow must be unique !!!!!
protected static interface	SerializerBase.HeaderMapDB
protected static class	SerializerBase.singletons

Nested classes/interfaces inherited from interface org.mapdb.Serializer

Serializer.CompressionWrapper<E>

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.lang.String	EMPTY_STRING

Fields inherited from interface org.mapdb.Serializer

BASIC, BOOLEAN, BYTE_ARRAY, BYTE_ARRAY_NOSIZE, CHAR_ARRAY, DOUBLE_ARRAY, ILLEGAL_ACCESS, INT_ARRAY, INTEGER, JAVA, LONG, LONG_ARRAY, STRING, STRING_ASCII, STRING_INTERN, STRING_NOSIZE, UUID

Constructor Summary

Constructors

Constructor and Description
SerializerBase()

Method Summary

Modifier and Type	Method and Description
static void	assertSerializable(java.lang.Object o)
protected static byte[]	booleanToByteArray(boolean[] bool) Builds a byte array from the array of booleans, compressing up to 8 booleans per byte.
java.lang.Object	deserialize(java.io.DataInput is, int capacity) Deserialize the content of an object from a DataInput.
java.lang.Object	deserialize(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.lang.Object	deserialize2(int head, java.io.DataInput is)
private java.lang.Object	deserialize3(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack, int head)
private byte[]	deserializeArrayByte(java.io.DataInput is)
private java.util.ArrayList<java.lang.Object>	deserializeArrayList(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.util.ArrayList<java.lang.Object>	deserializeArrayListPackedLong(java.io.DataInput is)
private java.lang.Object[]	deserializeArrayObject(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.lang.Object[]	deserializeArrayObjectAllNull(java.io.DataInput is)
private java.lang.Object[]	deserializeArrayObjectNoRefs(java.io.DataInput is)
private java.lang.Object[]	deserializeArrayObjectPackedLong(java.io.DataInput is)
protected java.lang.Class	deserializeClass(java.io.DataInput is)
private java.util.HashMap<java.lang.Object,java.lang.Object>	deserializeHashMap(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.util.HashSet<java.lang.Object>	deserializeHashSet(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.util.LinkedHashMap<java.lang.Object,java.lang.Object>	deserializeLinkedHashMap(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.util.LinkedHashSet<java.lang.Object>	deserializeLinkedHashSet(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.util.LinkedList	deserializeLinkedList(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
protected java.lang.Object	deserializeMapDB(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.util.Properties	deserializeProperties(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
(package private) static java.lang.String	deserializeString(java.io.DataInput buf, int len)
private java.util.TreeMap<java.lang.Object,java.lang.Object>	deserializeTreeMap(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private java.util.TreeSet<java.lang.Object>	deserializeTreeSet(java.io.DataInput is, SerializerBase.FastArrayList<java.lang.Object> objectStack)
protected java.lang.Object	deserializeUnknownHeader(java.io.DataInput is, int head, SerializerBase.FastArrayList<java.lang.Object> objectStack) override this method to extend SerializerBase functionality
int	fixedSize() Data could be serialized into record with variable size or fixed size.
protected Engine	getEngine()
protected static boolean[]	readBooleanArray(int numBools, java.io.DataInput is) Unpacks an integer from the DataInput indicating the number of booleans that are compressed.
void	serialize(java.io.DataOutput out, java.lang.Object obj) Serialize the content of an object into a ObjectOutput
void	serialize(java.io.DataOutput out, java.lang.Object obj, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private void	serialize2(java.io.DataOutput out, java.lang.Object obj, SerializerBase.FastArrayList<java.lang.Object> objectStack, java.lang.Class<?> clazz)
private void	serializeByte(java.io.DataOutput out, java.lang.Object obj)
private void	serializeByteArray(java.io.DataOutput out, byte[] b)
protected void	serializeClass(java.io.DataOutput out, java.lang.Class clazz)
private void	serializeCollection(int header, java.io.DataOutput out, java.lang.Object obj, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private void	serializeDouble(java.io.DataOutput out, java.lang.Object obj)
private void	serializeFloat(java.io.DataOutput out, java.lang.Object obj)
private void	serializeInt(java.io.DataOutput out, java.lang.Object obj)
private void	serializeIntArray(java.io.DataOutput out, int[] val)
private void	serializeLong(java.io.DataOutput out, java.lang.Object obj)
private void	serializeLongArray(java.io.DataOutput out, long[] val)
private void	serializeMap(int header, java.io.DataOutput out, java.lang.Object obj, SerializerBase.FastArrayList<java.lang.Object> objectStack)
private void	serializerChar(java.io.DataOutput out, java.lang.Object obj)
private void	serializeShort(java.io.DataOutput out, java.lang.Object obj)
private void	serializeString(java.io.DataOutput out, java.lang.Object obj)
protected void	serializeUnknownObject(java.io.DataOutput out, java.lang.Object obj, SerializerBase.FastArrayList<java.lang.Object> objectStack) override this method to extend SerializerBase functionality

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_STRING

protected static final java.lang.String EMPTY_STRING

See Also:

Constant Field Values

Constructor Detail

SerializerBase

public SerializerBase()

Method Detail

serialize

public void serialize(java.io.DataOutput out,
                      java.lang.Object obj)
               throws java.io.IOException

Description copied from interface: Serializer

Serialize the content of an object into a ObjectOutput

Specified by:

serialize in interface Serializer<java.lang.Object>

Parameters:

out - ObjectOutput to save object into

obj - Object to serialize

Throws:

java.io.IOException

serialize

public void serialize(java.io.DataOutput out,
                      java.lang.Object obj,
                      SerializerBase.FastArrayList<java.lang.Object> objectStack)
               throws java.io.IOException

Throws:

java.io.IOException

serialize2

private void serialize2(java.io.DataOutput out,
                        java.lang.Object obj,
                        SerializerBase.FastArrayList<java.lang.Object> objectStack,
                        java.lang.Class<?> clazz)
                 throws java.io.IOException

Throws:

java.io.IOException

serializeString

private void serializeString(java.io.DataOutput out,
                             java.lang.Object obj)
                      throws java.io.IOException

Throws:

java.io.IOException

serializeLongArray

private void serializeLongArray(java.io.DataOutput out,
                                long[] val)
                         throws java.io.IOException

Throws:

java.io.IOException

serializeIntArray

private void serializeIntArray(java.io.DataOutput out,
                               int[] val)
                        throws java.io.IOException

Throws:

java.io.IOException

serializeDouble

private void serializeDouble(java.io.DataOutput out,
                             java.lang.Object obj)
                      throws java.io.IOException

Throws:

java.io.IOException

serializeFloat

private void serializeFloat(java.io.DataOutput out,
                            java.lang.Object obj)
                     throws java.io.IOException

Throws:

java.io.IOException

serializeShort

private void serializeShort(java.io.DataOutput out,
                            java.lang.Object obj)
                     throws java.io.IOException

Throws:

java.io.IOException

serializerChar

private void serializerChar(java.io.DataOutput out,
                            java.lang.Object obj)
                     throws java.io.IOException

Throws:

java.io.IOException

serializeByte

private void serializeByte(java.io.DataOutput out,
                           java.lang.Object obj)
                    throws java.io.IOException

Throws:

java.io.IOException

serializeLong

private void serializeLong(java.io.DataOutput out,
                           java.lang.Object obj)
                    throws java.io.IOException

Throws:

java.io.IOException

serializeInt

private void serializeInt(java.io.DataOutput out,
                          java.lang.Object obj)
                   throws java.io.IOException

Throws:

java.io.IOException

serializeClass

protected void serializeClass(java.io.DataOutput out,
                              java.lang.Class clazz)
                       throws java.io.IOException

Throws:

java.io.IOException

serializeMap

private void serializeMap(int header,
                          java.io.DataOutput out,
                          java.lang.Object obj,
                          SerializerBase.FastArrayList<java.lang.Object> objectStack)
                   throws java.io.IOException

Throws:

java.io.IOException

serializeCollection

private void serializeCollection(int header,
                                 java.io.DataOutput out,
                                 java.lang.Object obj,
                                 SerializerBase.FastArrayList<java.lang.Object> objectStack)
                          throws java.io.IOException

Throws:

java.io.IOException

serializeByteArray

private void serializeByteArray(java.io.DataOutput out,
                                byte[] b)
                         throws java.io.IOException

Throws:

java.io.IOException

deserializeString

static java.lang.String deserializeString(java.io.DataInput buf,
                                          int len)
                                   throws java.io.IOException

Throws:

java.io.IOException

deserialize

public java.lang.Object deserialize(java.io.DataInput is,
                                    int capacity)
                             throws java.io.IOException

Description copied from interface: Serializer

Deserialize the content of an object from a DataInput.

Specified by:

deserialize in interface Serializer<java.lang.Object>

Parameters:

is - to read serialized data from

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

Returns:

deserialized object

Throws:

java.io.IOException

deserialize

public java.lang.Object deserialize(java.io.DataInput is,
                                    SerializerBase.FastArrayList<java.lang.Object> objectStack)
                             throws java.io.IOException

Throws:

java.io.IOException

deserialize3

private java.lang.Object deserialize3(java.io.DataInput is,
                                      SerializerBase.FastArrayList<java.lang.Object> objectStack,
                                      int head)
                               throws java.io.IOException

Throws:

java.io.IOException

deserialize2

private java.lang.Object deserialize2(int head,
                                      java.io.DataInput is)
                               throws java.io.IOException

Throws:

java.io.IOException

assertSerializable

public static void assertSerializable(java.lang.Object o)

deserializeMapDB

protected java.lang.Object deserializeMapDB(java.io.DataInput is,
                                            SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                     throws java.io.IOException

Throws:

java.io.IOException

getEngine

protected Engine getEngine()

deserializeClass

protected java.lang.Class deserializeClass(java.io.DataInput is)
                                    throws java.io.IOException

Throws:

java.io.IOException

deserializeArrayByte

private byte[] deserializeArrayByte(java.io.DataInput is)
                             throws java.io.IOException

Throws:

java.io.IOException

deserializeArrayObject

private java.lang.Object[] deserializeArrayObject(java.io.DataInput is,
                                                  SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                           throws java.io.IOException

Throws:

java.io.IOException

deserializeArrayObjectNoRefs

private java.lang.Object[] deserializeArrayObjectNoRefs(java.io.DataInput is)
                                                 throws java.io.IOException

Throws:

java.io.IOException

deserializeArrayObjectAllNull

private java.lang.Object[] deserializeArrayObjectAllNull(java.io.DataInput is)
                                                  throws java.io.IOException

Throws:

java.io.IOException

deserializeArrayObjectPackedLong

private java.lang.Object[] deserializeArrayObjectPackedLong(java.io.DataInput is)
                                                     throws java.io.IOException

Throws:

java.io.IOException

deserializeArrayList

private java.util.ArrayList<java.lang.Object> deserializeArrayList(java.io.DataInput is,
                                                                   SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                                            throws java.io.IOException

Throws:

java.io.IOException

deserializeArrayListPackedLong

private java.util.ArrayList<java.lang.Object> deserializeArrayListPackedLong(java.io.DataInput is)
                                                                      throws java.io.IOException

Throws:

java.io.IOException

deserializeLinkedList

private java.util.LinkedList deserializeLinkedList(java.io.DataInput is,
                                                   SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                            throws java.io.IOException

Throws:

java.io.IOException

deserializeHashSet

private java.util.HashSet<java.lang.Object> deserializeHashSet(java.io.DataInput is,
                                                               SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                                        throws java.io.IOException

Throws:

java.io.IOException

deserializeLinkedHashSet

private java.util.LinkedHashSet<java.lang.Object> deserializeLinkedHashSet(java.io.DataInput is,
                                                                           SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                                                    throws java.io.IOException

Throws:

java.io.IOException

deserializeTreeSet

private java.util.TreeSet<java.lang.Object> deserializeTreeSet(java.io.DataInput is,
                                                               SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                                        throws java.io.IOException

Throws:

java.io.IOException

deserializeTreeMap

private java.util.TreeMap<java.lang.Object,java.lang.Object> deserializeTreeMap(java.io.DataInput is,
                                                                                SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                                                         throws java.io.IOException

Throws:

java.io.IOException

deserializeHashMap

private java.util.HashMap<java.lang.Object,java.lang.Object> deserializeHashMap(java.io.DataInput is,
                                                                                SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                                                         throws java.io.IOException

Throws:

java.io.IOException

deserializeLinkedHashMap

private java.util.LinkedHashMap<java.lang.Object,java.lang.Object> deserializeLinkedHashMap(java.io.DataInput is,
                                                                                            SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                                                                     throws java.io.IOException

Throws:

java.io.IOException

deserializeProperties

private java.util.Properties deserializeProperties(java.io.DataInput is,
                                                   SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                            throws java.io.IOException

Throws:

java.io.IOException

serializeUnknownObject

protected void serializeUnknownObject(java.io.DataOutput out,
                                      java.lang.Object obj,
                                      SerializerBase.FastArrayList<java.lang.Object> objectStack)
                               throws java.io.IOException

override this method to extend SerializerBase functionality

Throws:

java.io.IOException

deserializeUnknownHeader

protected java.lang.Object deserializeUnknownHeader(java.io.DataInput is,
                                                    int head,
                                                    SerializerBase.FastArrayList<java.lang.Object> objectStack)
                                             throws java.io.IOException

override this method to extend SerializerBase functionality

Throws:

java.io.IOException

booleanToByteArray

protected static byte[] booleanToByteArray(boolean[] bool)

Builds a byte array from the array of booleans, compressing up to 8 booleans per byte. Author of this method is Chris Alexander.

Parameters:

bool - The booleans to be compressed.

Returns:

The fully compressed byte array.

readBooleanArray

protected static boolean[] readBooleanArray(int numBools,
                                            java.io.DataInput is)
                                     throws java.io.IOException

Unpacks an integer from the DataInput indicating the number of booleans that are compressed. It then calculates the number of bytes, reads them in, and decompresses and converts them into an array of booleans using the toBooleanArray(byte[]); method. The array of booleans are trimmed to numBools elements. This is necessary in situations where the number of booleans is not a multiple of 8. Author of this method is Chris Alexander.

Returns:

The boolean array decompressed from the bytes read in.

Throws:

java.io.IOException - If an error occurred while reading.

fixedSize

public int fixedSize()

Description copied from interface: Serializer

Data could be serialized into record with variable size or fixed size. Some optimizations can be applied to serializers with fixed size

Specified by:

fixedSize in interface Serializer<java.lang.Object>

Returns:

fixed size or -1 for variable size