com.hp.hpl.jena.util

Class OneToManyMap.Entry<From,To>

java.lang.Object

com.hp.hpl.jena.util.OneToManyMap.Entry<From,To>

All Implemented Interfaces:

Map.Entry<From,To>

Enclosing class:

OneToManyMap<From,To>

public static class OneToManyMap.Entry<From,To>
extends Object
implements Map.Entry<From,To>

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

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object x) Compares the specified object with this entry for equality.
From	getKey() Answer the key for the entry
To	getValue() Answer the value for the entry
int	hashCode() Returns the hash code value for this map entry.
To	setValue(To 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<From,To>

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 From getKey()

Answer the key for the entry

Specified by:

getKey in interface Map.Entry<From,To>

Returns:

The key object

getValue

public To getValue()

Answer the value for the entry

Specified by:

getValue in interface Map.Entry<From,To>

Returns:

The value object

setValue

public To setValue(To value)
            throws UnsupportedOperationException

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

Specified by:

setValue in interface Map.Entry<From,To>

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<From,To>

Overrides:

hashCode in class Object