com.hp.hpl.jena.util
Class OneToManyMap.Entry

java.lang.Object
  com.hp.hpl.jena.util.OneToManyMap.Entry

All Implemented Interfaces:

Map.Entry

Enclosing class:

OneToManyMap

public class OneToManyMap.Entry
extends Object
implements Map.Entry

Helper class to implement the Map.Entry interface to enumerate entries in the map

Method Summary

boolean	equals(Object x) Compares the specified object with this entry for equality.
Object	getKey() Answer the key for the entry
Object	getValue() Answer the value for the entry
int	hashCode() Returns the hash code value for this map entry.
Object	setValue(Object value) Set the value, which writes through to the map.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Method Detail

equals

public boolean equals(Object x)

Compares the specified object with this entry for equality. Returns true if the given object is also a map entry and the two entries represent the same mapping. More formally, two entries e1 and e2 represent the same mapping if

      (e1.getKey()==null ?
                         e2.getKey()==null : e1.getKey().equals(e2.getKey()))  &&
      (e1.getValue()==null ?
                         e2.getValue()==null : e1.getValue().equals(e2.getValue()))
 

This ensures that the equals method works properly across different implementations of the Map.Entry interface.

Specified by:

equals in interface Map.Entry

Overrides:

equals in class Object

Parameters:

x - The object to compare against

Returns:

True if the given object is equal to this Map.Entry object.

getKey

public Object getKey()

Answer the key for the entry

Specified by:

getKey in interface Map.Entry

Returns:

The key object

getValue

public Object getValue()

Answer the value for the entry

Specified by:

getValue in interface Map.Entry

Returns:

The value object

setValue

public Object setValue(Object value)
                throws UnsupportedOperationException

Set the value, which writes through to the map. Not implemented.

Specified by:

setValue in interface Map.Entry

Throws:

UnsupportedOperationException

hashCode

public int hashCode()

Returns the hash code value for this map entry. The hash code of a map entry e is defined to be: (e.getKey()==null ? 0 : e.getKey().hashCode()) ^ (e.getValue()==null ? 0 : e.getValue().hashCode()) This ensures that e1.equals(e2) implies that e1.hashCode()==e2.hashCode() for any two Entries e1 and e2, as required by the general contract of Object.hashCode.

Specified by:

hashCode in interface Map.Entry

Overrides:

hashCode in class Object