org.calrissian.mango.domain

Class Tuple<T>

java.lang.Object

org.calrissian.mango.domain.Tuple<T>

All Implemented Interfaces:

Serializable

public class Tuple<T>
extends Object
implements Serializable

A value class representing a key/value pair with metadata. This class is immutable.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected String	key
protected Map<String,Object>	metadata Metadata allows the tuple to be extensible so that different services can read different properties without the need for inheritance.
protected T	value

Constructor Summary

Constructors

Constructor and Description
Tuple(String key, T value)
Tuple(String key, T value, Map<String,Object> metadata)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
String	getKey()
Map<String,Object>	getMetadata() Gets an immutable view of the current metadata
<T> T	getMetadataValue(String key) Gets a value for the metadata key for the current tuple.
T	getValue()
int	hashCode()
Set<String>	metadataKeys() Gets all keys from the metadata
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

key

protected final String key

value

protected final T value

metadata

protected final Map<String,Object> metadata

Metadata allows the tuple to be extensible so that different services can read different properties without the need for inheritance.

Constructor Detail

Tuple

public Tuple(String key,
     T value)

Tuple

public Tuple(String key,
     T value,
     Map<String,Object> metadata)

Method Detail

getKey

public String getKey()

getValue

public T getValue()

metadataKeys

public Set<String> metadataKeys()

Gets all keys from the metadata

getMetadataValue

public <T> T getMetadataValue(String key)

Gets a value for the metadata key for the current tuple.

getMetadata

public Map<String,Object> getMetadata()

Gets an immutable view of the current metadata

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object