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org.infohazard.maverick.util
Class NoOverwriteMap  

java.lang.Object
  org.infohazard.maverick.util.NoOverwriteMap

All Implemented Interfaces:

java.util.Map

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public class NoOverwriteMap

extends java.lang.Object

implements java.util.Map

Map wrapper which prevents overwriting existing keys.

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Nested Class Summary
static class	NoOverwriteMap.OverwriteException

 

Nested classes inherited from class java.util.Map

java.util.Map.Entry

 

Field Summary
protected  java.util.Map	wrapped

 

Constructor Summary

NoOverwriteMap(java.util.Map wrap)

 

Method Summary
void	clear()           Remove all entries from this Map (optional operation).
boolean	containsKey(java.lang.Object key)           Returns true if this contains a mapping for the given key.
boolean	containsValue(java.lang.Object value)           Returns true if this contains at least one mapping with the given value.
java.util.Set	entrySet()           Returns a set view of the mappings in this Map.
boolean	equals(java.lang.Object o)           Compares the specified object with this map for equality.
java.lang.Object	get(java.lang.Object key)           Returns the value mapped by the given key.
int	hashCode()           Returns the hash code for this map.
boolean	isEmpty()           Returns true if the map contains no mappings.
java.util.Set	keySet()           Returns a set view of the keys in this Map.
java.lang.Object	put(java.lang.Object key, java.lang.Object value)           Prevents overwriting existing keys.
void	putAll(java.util.Map t)           Prevents overwriting existing keys.
java.lang.Object	remove(java.lang.Object key)           Removes the mapping for this key if present (optional operation).
int	size()           Returns the number of key-value mappings in the map.
java.util.Collection	values()           Returns a collection (or bag) view of the values in this Map.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

wrapped

protected java.util.Map wrapped

Constructor Detail

NoOverwriteMap

public NoOverwriteMap(java.util.Map wrap)

Method Detail

size

public int size()

Description copied from interface: java.util.Map

Returns the number of key-value mappings in the map. If there are more than Integer.MAX_VALUE mappings, return Integer.MAX_VALUE.

Specified by:

size in interface java.util.Map

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isEmpty

public boolean isEmpty()

Description copied from interface: java.util.Map

Returns true if the map contains no mappings.

Specified by:

isEmpty in interface java.util.Map

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containsKey

public boolean containsKey(java.lang.Object key)

Description copied from interface: java.util.Map

Returns true if this contains a mapping for the given key.

Specified by:

containsKey in interface java.util.Map

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containsValue

public boolean containsValue(java.lang.Object value)

Description copied from interface: java.util.Map

Returns true if this contains at least one mapping with the given value. In other words, returns true if a value v exists where (value == null ? v == null : value.equals(v)). This usually requires linear time.

Specified by:

containsValue in interface java.util.Map

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get

public java.lang.Object get(java.lang.Object key)

Description copied from interface: java.util.Map

Returns the value mapped by the given key. Returns null if there is no mapping. However, in Maps that accept null values, you must rely on containsKey to determine if a mapping exists.

Specified by:

get in interface java.util.Map

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remove

public java.lang.Object remove(java.lang.Object key)

Description copied from interface: java.util.Map

Removes the mapping for this key if present (optional operation). If the key is not present, this returns null. Note that maps which permit null values may also return null if the key was removed.

Specified by:

remove in interface java.util.Map

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clear

public void clear()

Description copied from interface: java.util.Map

Remove all entries from this Map (optional operation).

Specified by:

clear in interface java.util.Map

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keySet

public java.util.Set keySet()

Description copied from interface: java.util.Map

Returns a set view of the keys in this Map. The set is backed by the map, so that changes in one show up in the other. Modifications made while an iterator is in progress cause undefined behavior. If the set supports removal, these methods remove the underlying mapping from the map: Iterator.remove, Set.remove, removeAll, retainAll, and clear. Element addition, via add or addAll, is not supported via this set.

Specified by:

keySet in interface java.util.Map

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values

public java.util.Collection values()

Description copied from interface: java.util.Map

Returns a collection (or bag) view of the values in this Map. The collection is backed by the map, so that changes in one show up in the other. Modifications made while an iterator is in progress cause undefined behavior. If the collection supports removal, these methods remove the underlying mapping from the map: Iterator.remove, Collection.remove, removeAll, retainAll, and clear. Element addition, via add or addAll, is not supported via this collection.

Specified by:

values in interface java.util.Map

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entrySet

public java.util.Set entrySet()

Description copied from interface: java.util.Map

Returns a set view of the mappings in this Map. Each element in the set is a Map.Entry. The set is backed by the map, so that changes in one show up in the other. Modifications made while an iterator is in progress cause undefined behavior. If the set supports removal, these methods remove the underlying mapping from the map: Iterator.remove, Set.remove, removeAll, retainAll, and clear. Element addition, via add or addAll, is not supported via this set.

Specified by:

entrySet in interface java.util.Map

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equals

public boolean equals(java.lang.Object o)

Description copied from interface: java.util.Map

Compares the specified object with this map for equality. Returns true if the other object is a Map with the same mappings, that is,
o instanceof Map && entrySet().equals(((Map) o).entrySet(); This allows comparison of maps, regardless of implementation.

Specified by:

equals in interface java.util.Map

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hashCode

public int hashCode()

Description copied from interface: java.util.Map

Returns the hash code for this map. This is the sum of all hashcodes for each Map.Entry object in entrySet. This allows comparison of maps, regardless of implementation, and satisfies the contract of Object.hashCode.

Specified by:

hashCode in interface java.util.Map

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put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Prevents overwriting existing keys.

Specified by:

put in interface java.util.Map

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putAll

public void putAll(java.util.Map t)

Prevents overwriting existing keys.

Specified by:

putAll in interface java.util.Map

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> infohazard >> maverick >> [ util overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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