saffron.util
Class MultiMap

java.lang.Object
  |
  +--java.util.AbstractMap
        |
        +--java.util.HashMap
              |
              +--saffron.util.MultiMap

All Implemented Interfaces:

Cloneable, Map, Serializable

public class MultiMap

extends HashMap

Map which contains more than one value per key.

You can either use a MultiMap as a regular map, or you can use the additional methods putMulti(java.lang.Object, java.lang.Object) and getMulti(java.lang.Object). Values are returned in the order in which they were added.

Since:

May 18, 2003

Version:

$Id: //open/saffron/src/main/saffron/util/MultiMap.java#1 $

Author:

jhyde

See Also:

Serialized Form

Nested Class Summary

private static class

MultiMap.ValueList Holder class, ensures that user's values are never interpreted as multiple values.

Field Summary

Fields inherited from class java.util.HashMap

Fields inherited from class java.util.AbstractMap

Constructor Summary

MultiMap()

Method Summary

List	getMulti(Object key) Returns a list of values for a given key; returns an empty list if not found.
void	putMulti(Object key, Object value) Adds a value for this key.

Methods inherited from class java.util.HashMap

clear, clone, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

MultiMap

public MultiMap()

Method Detail

putMulti

public void putMulti(Object key,
                     Object value)

Adds a value for this key.

getMulti

public List getMulti(Object key)

Returns a list of values for a given key; returns an empty list if not found.

Post-condition:

return != null