planetj.servlet.wrapper
Class NoOverwriteMap

java.lang.Object
  |
  +--planetj.servlet.wrapper.NoOverwriteMap

All Implemented Interfaces:

Map

public class NoOverwriteMap

extends Object

implements Map

Map wrapper which prevents overwriting existing keys.

Nested Class Summary

static class

NoOverwriteMap.OverwriteException

Constructor Summary

NoOverwriteMap(Map wrap)

Method Summary

void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set	entrySet()
boolean	equals(Object o)
Object	get(Object key)
int	hashCode()
boolean	isEmpty()
Set	keySet()
Object	put(Object key, Object value) Prevents overwriting existing keys.
void	putAll(Map t) Prevents overwriting existing keys.
Object	remove(Object key)
int	size()
Collection	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

NoOverwriteMap

public NoOverwriteMap(Map wrap)

Method Detail

clear

public void clear()

Specified by:

clear in interface Map

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map

entrySet

public Set entrySet()

Specified by:

entrySet in interface Map

equals

public boolean equals(Object o)

Specified by:

equals in interface Map

Overrides:

equals in class Object

get

public Object get(Object key)

Specified by:

get in interface Map

hashCode

public int hashCode()

Specified by:

hashCode in interface Map

Overrides:

hashCode in class Object

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map

keySet

public Set keySet()

Specified by:

keySet in interface Map

put

public Object put(Object key,
                  Object value)

Prevents overwriting existing keys.

Specified by:

put in interface Map

Throws:

NoOverwriteMap.OverwriteException - if the key is already present.

putAll

public void putAll(Map t)

Prevents overwriting existing keys.

Specified by:

putAll in interface Map

Throws:

NoOverwriteMap.OverwriteException - if the key is already present.

remove

public Object remove(Object key)

Specified by:

remove in interface Map

size

public int size()

Specified by:

size in interface Map

values

public Collection values()

Specified by:

values in interface Map