org.mapdb.elsa

Class ElsaSerializerPojo

java.lang.Object

org.mapdb.elsa.ElsaSerializerBase

org.mapdb.elsa.ElsaSerializerPojo

All Implemented Interfaces:

Serializable, ElsaSerializer

public class ElsaSerializerPojo
extends ElsaSerializerBase
implements Serializable

Serializer which handles POJO, object graphs etc.

Author:

Jan Kotek

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ElsaSerializerPojo.ClassInfo Stores info about single class stored in MapDB.
static class	ElsaSerializerPojo.FieldInfo Stores info about single field stored in MapDB.

Nested classes/interfaces inherited from class org.mapdb.elsa.ElsaSerializerBase

ElsaSerializerBase.Deser<A>, ElsaSerializerBase.DeserInt, ElsaSerializerBase.DeserLong, ElsaSerializerBase.DeserSingleton, ElsaSerializerBase.DeserStringLen, ElsaSerializerBase.Header, ElsaSerializerBase.Ser<A>, ElsaSerializerBase.UserSer

Field Summary

Fields

Modifier and Type	Field and Description
protected static Method	androidConstructor
protected static Map<Class<?>,Constructor<?>>	class2constuctor
protected ElsaClassInfoResolver	classInfoResolver
protected ElsaClassCallback	missingClassNotification
protected static Method	sunConstructor
protected static Object	sunReflFac

Fields inherited from class org.mapdb.elsa.ElsaSerializerBase

classLoader, DESER_BYTE_ARRAY, headerDeser, objectStackType, ser, SER_BOOLEAN, SER_BYTE, SER_BYTE_ARRAY, SER_CHAR, SER_DOUBLE, SER_FLOAT, SER_INT, SER_INT_ARRAY, SER_LONG, SER_LONG_ARRAY, SER_SHORT, SER_STRING, singletons, singletonsReverse, userDeser

Constructor Summary

Constructors

Constructor and Description
ElsaSerializerPojo()
ElsaSerializerPojo(int objectStackType, Object[] singletons, Map<Class,ElsaSerializerBase.Ser> userSer, Map<Class,Integer> userSerHeaders, Map<Integer,ElsaSerializerBase.Deser> userDeser, ElsaClassCallback missingClassNotification, ElsaClassInfoResolver classInfoResolver)

Method Summary

Modifier and Type	Method and Description
protected void	assertClassSerializable(Class<?> clazz)
protected static Class	classForName(String className, ClassLoader loader)
ElsaSerializerPojo.ClassInfo	classInfoDeserialize(DataInput in)
void	classInfoSerialize(DataOutput out, ElsaSerializerPojo.ClassInfo ci)
int	classToId(String className)
protected <T> T	createInstanceSkippinkConstructor(Class<T> clazz) For pojo serialization we need to instantiate class without invoking its constructor.
protected Object	deserializeUnknownHeader(DataInput in, int head, ElsaStack objectStack) override this method to extend ElsaSerializerBase functionality
protected ObjectStreamField[]	fieldsForClass(Class<?> clazz)
protected ElsaSerializerPojo.ClassInfo	getClassInfo(int classId)
Object	getFieldValue(ElsaSerializerPojo.FieldInfo fieldInfo, Object object)
boolean	isSerializable(Object o) return true if mapdb knows howto serialize given object
static ElsaSerializerPojo.ClassInfo	makeClassInfo(Class clazz)
ElsaSerializerPojo.ClassInfo	makeClassInfo(String className)
protected void	notifyMissingClassInfo(Class className)
protected void	serializeUnknownObject(DataOutput out, Object obj, ElsaStack objectStack) override this method to extend ElsaSerializerBase functionality
void	setFieldValue(ElsaSerializerPojo.FieldInfo fieldInfo, Object object, Object value)
protected static boolean	usesAdvancedSerialization(Class<?> clazz)

Methods inherited from class org.mapdb.elsa.ElsaSerializerBase

clone, deserialize, deserialize, deserializeSingleton, initHeaderDeser, initSer, loadClass, loadClass2, loadClass2, loadClass3, newElsaStack, readBooleanArray, serialize, serialize, serializeClass, serializeObjectArray, writeBooleanArray

Methods inherited from class java.lang.Object

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

Field Detail

missingClassNotification

protected final ElsaClassCallback missingClassNotification

classInfoResolver

protected final ElsaClassInfoResolver classInfoResolver

sunConstructor

protected static Method sunConstructor

sunReflFac

protected static Object sunReflFac

androidConstructor

protected static Method androidConstructor

class2constuctor

protected static Map<Class<?>,Constructor<?>> class2constuctor

Constructor Detail

ElsaSerializerPojo

public ElsaSerializerPojo()

ElsaSerializerPojo

public ElsaSerializerPojo(int objectStackType,
                          Object[] singletons,
                          Map<Class,ElsaSerializerBase.Ser> userSer,
                          Map<Class,Integer> userSerHeaders,
                          Map<Integer,ElsaSerializerBase.Deser> userDeser,
                          ElsaClassCallback missingClassNotification,
                          ElsaClassInfoResolver classInfoResolver)

Method Detail

classInfoSerialize

public void classInfoSerialize(DataOutput out,
                               ElsaSerializerPojo.ClassInfo ci)
                        throws IOException

Throws:

IOException

classInfoDeserialize

public ElsaSerializerPojo.ClassInfo classInfoDeserialize(DataInput in)
                                                  throws IOException

Throws:

IOException

classForName

protected static Class classForName(String className,
                                    ClassLoader loader)

getClassInfo

protected ElsaSerializerPojo.ClassInfo getClassInfo(int classId)

notifyMissingClassInfo

protected void notifyMissingClassInfo(Class className)

makeClassInfo

public static ElsaSerializerPojo.ClassInfo makeClassInfo(Class clazz)

makeClassInfo

public ElsaSerializerPojo.ClassInfo makeClassInfo(String className)

usesAdvancedSerialization

protected static boolean usesAdvancedSerialization(Class<?> clazz)

fieldsForClass

protected ObjectStreamField[] fieldsForClass(Class<?> clazz)

isSerializable

public boolean isSerializable(Object o)

Description copied from class: ElsaSerializerBase

return true if mapdb knows howto serialize given object

Overrides:

isSerializable in class ElsaSerializerBase

assertClassSerializable

protected void assertClassSerializable(Class<?> clazz)
                                throws NotSerializableException,
                                       InvalidClassException

Throws:

NotSerializableException

InvalidClassException

getFieldValue

public Object getFieldValue(ElsaSerializerPojo.FieldInfo fieldInfo,
                            Object object)

setFieldValue

public void setFieldValue(ElsaSerializerPojo.FieldInfo fieldInfo,
                          Object object,
                          Object value)

classToId

public int classToId(String className)

serializeUnknownObject

protected void serializeUnknownObject(DataOutput out,
                                      Object obj,
                                      ElsaStack objectStack)
                               throws IOException

Description copied from class: ElsaSerializerBase

override this method to extend ElsaSerializerBase functionality

Overrides:

serializeUnknownObject in class ElsaSerializerBase

Throws:

IOException

deserializeUnknownHeader

protected Object deserializeUnknownHeader(DataInput in,
                                          int head,
                                          ElsaStack objectStack)
                                   throws IOException

Description copied from class: ElsaSerializerBase

override this method to extend ElsaSerializerBase functionality

Overrides:

deserializeUnknownHeader in class ElsaSerializerBase

Throws:

IOException

createInstanceSkippinkConstructor

protected <T> T createInstanceSkippinkConstructor(Class<T> clazz)

For pojo serialization we need to instantiate class without invoking its constructor. There are two ways to do it:

Using proprietary API on Oracle JDK and OpenJDK sun.reflect.ReflectionFactory.getReflectionFactory().newConstructorForSerialization() more at http://www.javaspecialists.eu/archive/Issue175.html

Using ObjectInputStream.newInstance on Android http://stackoverflow.com/a/3448384

If non of these works we fallback into usual reflection which requires an no-arg constructor