Package gnu.trove.decorator
Class TByteObjectHashMapDecorator<V>
- java.lang.Object
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- java.util.AbstractMap<java.lang.Byte,V>
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- gnu.trove.decorator.TByteObjectHashMapDecorator<V>
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- All Implemented Interfaces:
java.io.Externalizable
,java.io.Serializable
,java.lang.Cloneable
,java.util.Map<java.lang.Byte,V>
public class TByteObjectHashMapDecorator<V> extends java.util.AbstractMap<java.lang.Byte,V> implements java.util.Map<java.lang.Byte,V>, java.io.Externalizable, java.lang.Cloneable
Wrapper class to make a TByteObjectHashMap conform to the java.util.Map API. This class simply decorates an underlying TByteObjectHashMap and translates the Object-based APIs into their Trove primitive analogs. Note that wrapping and unwrapping primitive values is extremely inefficient. If possible, users of this class should override the appropriate methods in this class and use a table of canonical values. Created: Mon Sep 23 22:07:40 PDT 2002- Author:
- Eric D. Friedman
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected TByteObjectHashMap<V>
_map
the wrapped primitive map
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Constructor Summary
Constructors Constructor Description TByteObjectHashMapDecorator()
FOR EXTERNALIZATION ONLY!!TByteObjectHashMapDecorator(TByteObjectHashMap<V> map)
Creates a wrapper that decorates the specified primitive map.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Empties the map.TByteObjectHashMapDecorator
clone()
Clones the underlying trove collection and returns the clone wrapped in a new decorator instance.boolean
containsKey(java.lang.Object key)
Checks for the present of key in the keys of the map.boolean
containsValue(java.lang.Object val)
Checks for the presence of val in the values of the map.java.util.Set<java.util.Map.Entry<java.lang.Byte,V>>
entrySet()
Returns a Set view on the entries of the map.V
get(java.lang.Object key)
Retrieves the value for keyTByteObjectHashMap<V>
getMap()
Returns a reference to the map wrapped by this decorator.boolean
isEmpty()
Indicates whether map has any entries.V
put(java.lang.Byte key, V value)
Inserts a key/value pair into the map.void
putAll(java.util.Map<? extends java.lang.Byte,? extends V> map)
Copies the key/value mappings in map into this map.void
readExternal(java.io.ObjectInput in)
V
remove(java.lang.Object key)
Deletes a key/value pair from the map.int
size()
Returns the number of entries in the map.protected byte
unwrapKey(java.lang.Object key)
Unwraps a keyprotected V
unwrapValue(V value)
Unwraps a valueprotected java.lang.Byte
wrapKey(byte k)
Wraps a keyprotected V
wrapValue(V o)
Wraps a valuevoid
writeExternal(java.io.ObjectOutput out)
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Field Detail
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_map
protected TByteObjectHashMap<V> _map
the wrapped primitive map
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Constructor Detail
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TByteObjectHashMapDecorator
public TByteObjectHashMapDecorator()
FOR EXTERNALIZATION ONLY!!
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TByteObjectHashMapDecorator
public TByteObjectHashMapDecorator(TByteObjectHashMap<V> map)
Creates a wrapper that decorates the specified primitive map.
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Method Detail
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getMap
public TByteObjectHashMap<V> getMap()
Returns a reference to the map wrapped by this decorator.
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clone
public TByteObjectHashMapDecorator clone()
Clones the underlying trove collection and returns the clone wrapped in a new decorator instance. This is a shallow clone except where primitives are concerned.- Overrides:
clone
in classjava.util.AbstractMap<java.lang.Byte,V>
- Returns:
- a copy of the receiver
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get
public V get(java.lang.Object key)
Retrieves the value for key
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clear
public void clear()
Empties the map.
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remove
public V remove(java.lang.Object key)
Deletes a key/value pair from the map.
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entrySet
public java.util.Set<java.util.Map.Entry<java.lang.Byte,V>> entrySet()
Returns a Set view on the entries of the map.
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containsValue
public boolean containsValue(java.lang.Object val)
Checks for the presence of val in the values of the map.
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containsKey
public boolean containsKey(java.lang.Object key)
Checks for the present of key in the keys of the map.
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size
public int size()
Returns the number of entries in the map.
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isEmpty
public boolean isEmpty()
Indicates whether map has any entries.
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putAll
public void putAll(java.util.Map<? extends java.lang.Byte,? extends V> map)
Copies the key/value mappings in map into this map. Note that this will be a deep copy, as storage is by primitive value.
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wrapKey
protected java.lang.Byte wrapKey(byte k)
Wraps a key- Parameters:
k
- key in the underlying map- Returns:
- an Object representation of the key
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unwrapKey
protected byte unwrapKey(java.lang.Object key)
Unwraps a key- Parameters:
key
- wrapped key- Returns:
- an unwrapped representation of the key
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wrapValue
protected final V wrapValue(V o)
Wraps a value- Parameters:
o
- value in the underlying map- Returns:
- an Object representation of the value
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unwrapValue
protected final V unwrapValue(V value)
Unwraps a value- Parameters:
value
- wrapped value- Returns:
- an unwrapped representation of the value
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readExternal
public void readExternal(java.io.ObjectInput in) throws java.io.IOException, java.lang.ClassNotFoundException
- Specified by:
readExternal
in interfacejava.io.Externalizable
- Throws:
java.io.IOException
java.lang.ClassNotFoundException
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writeExternal
public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException
- Specified by:
writeExternal
in interfacejava.io.Externalizable
- Throws:
java.io.IOException
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