Package org.apache.flink.table.runtime.typeutils.serializers.python

Class StringSerializer

java.lang.Object

org.apache.flink.api.common.typeutils.TypeSerializer<T>

org.apache.flink.api.common.typeutils.base.TypeSerializerSingleton<String>

org.apache.flink.table.runtime.typeutils.serializers.python.StringSerializer

All Implemented Interfaces:

Serializable

@Internal
public class StringSerializer
extends org.apache.flink.api.common.typeutils.base.TypeSerializerSingleton<String>

We create the StringSerializer instead of using the StringSerializer of flink-core module because the StringSerializer of flink-core module serialize every Char of String in serialize method and deserialize the Char to build the String. We want to convert String to UTF-8 bytes to serialize which is compatible with BinaryStringSerializer.

So we create this StringSerializer (only used in Java and Python data communication in udf).

StringSerializer for String.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	StringSerializer.StringSerializerSnapshot	Serializer configuration snapshot for compatibility and format evolution.

Field Summary

Fields

Modifier and Type	Field	Description
static final StringSerializer	INSTANCE

Constructor Summary

Constructors

Constructor	Description
StringSerializer()

Method Summary

Modifier and Type	Method	Description
String	copy(String from)
String	copy(String from, String reuse)
void	copy(org.apache.flink.core.memory.DataInputView source, org.apache.flink.core.memory.DataOutputView target)
String	createInstance()
String	deserialize(String reuse, org.apache.flink.core.memory.DataInputView source)
String	deserialize(org.apache.flink.core.memory.DataInputView source)
int	getLength()
boolean	isImmutableType()
void	serialize(String record, org.apache.flink.core.memory.DataOutputView target)
org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<String>	snapshotConfiguration()

Methods inherited from class org.apache.flink.api.common.typeutils.base.TypeSerializerSingleton

duplicate, equals, hashCode

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final StringSerializer INSTANCE

Constructor Details

StringSerializer

public StringSerializer()

Method Details

isImmutableType

public boolean isImmutableType()

Specified by:

isImmutableType in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

createInstance

public String createInstance()

Specified by:

createInstance in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

copy

public String copy(String from)

Specified by:

copy in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

copy

public String copy(String from,
 String reuse)

Specified by:

copy in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

getLength

public int getLength()

Specified by:

getLength in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

serialize

public void serialize(String record,
 org.apache.flink.core.memory.DataOutputView target)
               throws IOException

Specified by:

serialize in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

Throws:

IOException

deserialize

public String deserialize(org.apache.flink.core.memory.DataInputView source)
                   throws IOException

Specified by:

deserialize in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

Throws:

IOException

deserialize

public String deserialize(String reuse,
 org.apache.flink.core.memory.DataInputView source)
                   throws IOException

Specified by:

deserialize in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

Throws:

IOException

copy

public void copy(org.apache.flink.core.memory.DataInputView source,
 org.apache.flink.core.memory.DataOutputView target)
          throws IOException

Specified by:

copy in class org.apache.flink.api.common.typeutils.TypeSerializer<String>

Throws:

IOException

snapshotConfiguration

public org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<String> snapshotConfiguration()

Specified by:

snapshotConfiguration in class org.apache.flink.api.common.typeutils.TypeSerializer<String>