org.apache.flink.types

Class MapValue<K extends Value,V extends Value>

java.lang.Object

org.apache.flink.types.MapValue<K,V>

Type Parameters:

K - Type of the map's key element.

V - Type of the map's value element.

All Implemented Interfaces:

Serializable, Map<K,V>, IOReadableWritable, Value

@Public
public abstract class MapValue<K extends Value,V extends Value>
extends Object
implements Value, Map<K,V>

Generic map base type for PACT programs that implements the Value and Map interfaces. The MapValue encapsulates a Java HashMap object.

See Also:

Value, Map, HashMap, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
MapValue() Initializes the encapsulated map with an empty HashMap.
MapValue(Map<K,V> map) Initializes the encapsulated map with a HashMap filled with all entries of the provided map.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
boolean	equals(Object obj)
V	get(Object key)
int	hashCode()
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
void	read(DataInputView in) Reads the object's internal data from the given data input view.
V	remove(Object key)
int	size()
String	toString()
Collection<V>	values()
void	write(DataOutputView out) Writes the object's internal data to the given data output view.

Methods inherited from class java.lang.Object

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

Constructor Detail

MapValue

public MapValue()

Initializes the encapsulated map with an empty HashMap.

MapValue

public MapValue(Map<K,V> map)

Initializes the encapsulated map with a HashMap filled with all entries of the provided map.

Parameters:

map - Map holding all entries with which the new encapsulated map is filled.

Method Detail

read

public void read(DataInputView in)
          throws IOException

Description copied from interface: IOReadableWritable

Reads the object's internal data from the given data input view.

Specified by:

read in interface IOReadableWritable

Parameters:

in - the input view to read the data from

Throws:

IOException - thrown if any error occurs while reading from the input stream

write

public void write(DataOutputView out)
           throws IOException

Description copied from interface: IOReadableWritable

Writes the object's internal data to the given data output view.

Specified by:

write in interface IOReadableWritable

Parameters:

out - the output view to receive the data.

Throws:

IOException - thrown if any error occurs while writing to the output stream

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K extends Value,V extends Value>

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface Map<K extends Value,V extends Value>

Overrides:

equals in class Object

clear

public void clear()

Specified by:

clear in interface Map<K extends Value,V extends Value>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K extends Value,V extends Value>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K extends Value,V extends Value>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K extends Value,V extends Value>

get

public V get(Object key)

Specified by:

get in interface Map<K extends Value,V extends Value>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K extends Value,V extends Value>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K extends Value,V extends Value>

put

public V put(K key,
    V value)

Specified by:

put in interface Map<K extends Value,V extends Value>

putAll

public void putAll(Map<? extends K,? extends V> m)

Specified by:

putAll in interface Map<K extends Value,V extends Value>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K extends Value,V extends Value>

size

public int size()

Specified by:

size in interface Map<K extends Value,V extends Value>

values

public Collection<V> values()

Specified by:

values in interface Map<K extends Value,V extends Value>