K
- keyV
- valuepublic class LazyMapEntry<K,V> extends CachedQueryEntry<K,V> implements Serializable, IdentifiedDataSerializable
Map.Entry
implementation which serializes/de-serializes key and value objects on demand.
It is beneficial when you need to prevent unneeded serialization/de-serialization
when creating a Map.Entry
. Mainly targeted to supply a lazy entry to
EntryProcessor.process(Map.Entry)
and
EntryBackupProcessor.processBackup(Map.Entry)
} methods.
Note that this implementation is not synchronized and is not thread-safe.
LazyMapEntry itself is serializable as long as the object representations of both key and value are serializable.
After serialization objects are resolved using injected SerializationService. De-serialized LazyMapEntry
does contain object representation only Data representations and SerializationService is set to null. In other
words: It's as usable just as a regular Map.Entry.keyData, keyObject, valueData, valueObject
extractors, serializationService
Constructor and Description |
---|
LazyMapEntry() |
LazyMapEntry(Data key,
Object value,
InternalSerializationService serializationService) |
LazyMapEntry(Data key,
Object value,
InternalSerializationService serializationService,
Extractors extractors) |
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object o) |
int |
getFactoryId()
Returns DataSerializableFactory factory ID for this class.
|
int |
getId()
Returns type identifier for this class.
|
int |
hashCode() |
boolean |
hasNullValue()
Checks if this entry has null value without any deserialization.
|
boolean |
isModified() |
void |
readData(ObjectDataInput in)
Reads fields from the input stream
|
void |
remove()
Similar to calling
setValue(V) with null but doesn't return old-value hence no extra deserialization. |
V |
setValue(V value) |
String |
toString() |
void |
writeData(ObjectDataOutput out)
Writes object fields to output stream
|
getKey, getKeyData, getTargetObject, getValue, getValueData, init
getAttributeType, getAttributeValue
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
comparingByKey, comparingByKey, comparingByValue, comparingByValue
public LazyMapEntry()
public LazyMapEntry(Data key, Object value, InternalSerializationService serializationService)
public LazyMapEntry(Data key, Object value, InternalSerializationService serializationService, Extractors extractors)
public void remove()
setValue(V)
with null but doesn't return old-value hence no extra deserialization.public boolean hasNullValue()
public boolean isModified()
public boolean equals(Object o)
public int hashCode()
public void readData(ObjectDataInput in) throws IOException
DataSerializable
readData
in interface DataSerializable
in
- inputIOException
- if an I/O error occurs. In particular,
an IOException
may be thrown if the
input stream has been closed.public void writeData(ObjectDataOutput out) throws IOException
DataSerializable
writeData
in interface DataSerializable
out
- outputIOException
- if an I/O error occurs. In particular,
an IOException
may be thrown if the
output stream has been closed.public int getFactoryId()
IdentifiedDataSerializable
getFactoryId
in interface IdentifiedDataSerializable
public int getId()
IdentifiedDataSerializable
getId
in interface IdentifiedDataSerializable
Copyright © 2018 Hazelcast, Inc.. All Rights Reserved.