Package gnu.trove
Class TByteObjectHashMap<V>
- java.lang.Object
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- gnu.trove.THash
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- gnu.trove.TPrimitiveHash
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- gnu.trove.TByteHash
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- gnu.trove.TByteObjectHashMap<V>
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- All Implemented Interfaces:
TByteHashingStrategy,java.io.Externalizable,java.io.Serializable,java.lang.Cloneable
public class TByteObjectHashMap<V> extends TByteHash implements java.io.Externalizable
An open addressed Map implementation for byte keys and Object values. Created: Sun Nov 4 08:52:45 2001- Author:
- Eric D. Friedman
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected V[]_valuesthe values of the map-
Fields inherited from class gnu.trove.TByteHash
_hashingStrategy, _set
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Fields inherited from class gnu.trove.TPrimitiveHash
_states, FREE, FULL, REMOVED
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Fields inherited from class gnu.trove.THash
_autoCompactionFactor, _autoCompactRemovesRemaining, _free, _loadFactor, _maxSize, _size, DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR
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Constructor Summary
Constructors Constructor Description TByteObjectHashMap()Creates a newTByteObjectHashMapinstance with the default capacity and load factor.TByteObjectHashMap(int initialCapacity)Creates a newTByteObjectHashMapinstance with a prime capacity equal to or greater than initialCapacity and with the default load factor.TByteObjectHashMap(int initialCapacity, float loadFactor)Creates a newTByteObjectHashMapinstance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.TByteObjectHashMap(int initialCapacity, float loadFactor, TByteHashingStrategy strategy)Creates a newTByteObjectHashMapinstance with a prime value at or near the specified capacity and load factor.TByteObjectHashMap(int initialCapacity, TByteHashingStrategy strategy)Creates a newTByteObjectHashMapinstance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.TByteObjectHashMap(TByteHashingStrategy strategy)Creates a newTByteObjectHashMapinstance with the default capacity and load factor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclear()Empties the map.TByteObjectHashMap<V>clone()booleancontainsKey(byte key)checks for the present of key in the keys of the map.booleancontainsValue(V val)checks for the presence of val in the values of the map.booleanequals(java.lang.Object other)Compares this map with another map for equality of their stored entries.booleanforEachEntry(TByteObjectProcedure<V> procedure)Executes procedure for each key/value entry in the map.booleanforEachKey(TByteProcedure procedure)Executes procedure for each key in the map.booleanforEachValue(TObjectProcedure<V> procedure)Executes procedure for each value in the map.Vget(byte key)retrieves the value for keyjava.lang.Object[]getValues()Returns the values of the map.<T> T[]getValues(T[] a)Return the values of the map; the runtime type of the returned array is that of the specified array.inthashCode()TByteObjectIterator<V>iterator()byte[]keys()returns the keys of the map.byte[]keys(byte[] a)returns the keys of the map.Vput(byte key, V value)Inserts a key/value pair into the map.voidputAll(TByteObjectHashMap<V> map)Put all the entries from the given map into this map.VputIfAbsent(byte key, V value)Inserts a key/value pair into the map if the specified key is not already associated with a value.voidreadExternal(java.io.ObjectInput in)protected voidrehash(int newCapacity)rehashes the map to the new capacity.Vremove(byte key)Deletes a key/value pair from the map.protected voidremoveAt(int index)removes the mapping at index from the map.booleanretainEntries(TByteObjectProcedure<V> procedure)Retains only those entries in the map for which the procedure returns a true value.protected intsetUp(int initialCapacity)initializes the hashtable to a prime capacity which is at least initialCapacity + 1.java.lang.StringtoString()voidtransformValues(TObjectFunction<V,V> function)Transform the values in this map using function.voidwriteExternal(java.io.ObjectOutput out)-
Methods inherited from class gnu.trove.TByteHash
computeHashCode, contains, forEach, index, insertionIndex
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Methods inherited from class gnu.trove.TPrimitiveHash
capacity
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Methods inherited from class gnu.trove.THash
calculateGrownCapacity, compact, ensureCapacity, getAutoCompactionFactor, isEmpty, postInsertHook, reenableAutoCompaction, setAutoCompactionFactor, size, tempDisableAutoCompaction, trimToSize
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Field Detail
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_values
protected transient V[] _values
the values of the map
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Constructor Detail
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TByteObjectHashMap
public TByteObjectHashMap()
Creates a newTByteObjectHashMapinstance with the default capacity and load factor.
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TByteObjectHashMap
public TByteObjectHashMap(int initialCapacity)
Creates a newTByteObjectHashMapinstance with a prime capacity equal to or greater than initialCapacity and with the default load factor.- Parameters:
initialCapacity- anintvalue
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TByteObjectHashMap
public TByteObjectHashMap(int initialCapacity, float loadFactor)Creates a newTByteObjectHashMapinstance with a prime capacity equal to or greater than initialCapacity and with the specified load factor.- Parameters:
initialCapacity- anintvalueloadFactor- afloatvalue
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TByteObjectHashMap
public TByteObjectHashMap(TByteHashingStrategy strategy)
Creates a newTByteObjectHashMapinstance with the default capacity and load factor.- Parameters:
strategy- used to compute hash codes and to compare keys.
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TByteObjectHashMap
public TByteObjectHashMap(int initialCapacity, TByteHashingStrategy strategy)Creates a newTByteObjectHashMapinstance whose capacity is the next highest prime above initialCapacity + 1 unless that value is already prime.- Parameters:
initialCapacity- anintvaluestrategy- used to compute hash codes and to compare keys.
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TByteObjectHashMap
public TByteObjectHashMap(int initialCapacity, float loadFactor, TByteHashingStrategy strategy)Creates a newTByteObjectHashMapinstance with a prime value at or near the specified capacity and load factor.- Parameters:
initialCapacity- used to find a prime capacity for the table.loadFactor- used to calculate the threshold over which rehashing takes place.strategy- used to compute hash codes and to compare keys.
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Method Detail
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clone
public TByteObjectHashMap<V> clone()
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iterator
public TByteObjectIterator<V> iterator()
- Returns:
- a TByteObjectIterator with access to this map's keys and values
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setUp
protected int setUp(int initialCapacity)
initializes the hashtable to a prime capacity which is at least initialCapacity + 1.
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put
public V put(byte key, V value)
Inserts a key/value pair into the map.- Parameters:
key- anbytevaluevalue- anObjectvalue- Returns:
- the previous value associated with key,
or
nullif none was found.
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putIfAbsent
public V putIfAbsent(byte key, V value)
Inserts a key/value pair into the map if the specified key is not already associated with a value.- Parameters:
key- anbytevaluevalue- anObjectvalue- Returns:
- the previous value associated with key,
or
nullif none was found.
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putAll
public void putAll(TByteObjectHashMap<V> map)
Put all the entries from the given map into this map.- Parameters:
map- The map from which entries will be obtained to put into this map.
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rehash
protected void rehash(int newCapacity)
rehashes the map to the new capacity.
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get
public V get(byte key)
retrieves the value for key- Parameters:
key- anbytevalue- Returns:
- the value of key or (byte)0 if no such mapping exists.
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remove
public V remove(byte key)
Deletes a key/value pair from the map.- Parameters:
key- anbytevalue- Returns:
- an
Objectvalue or (byte)0 if no such mapping exists.
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equals
public boolean equals(java.lang.Object other)
Compares this map with another map for equality of their stored entries.- Overrides:
equalsin classjava.lang.Object- Parameters:
other- anObjectvalue- Returns:
- a
booleanvalue
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hashCode
public int hashCode()
- Overrides:
hashCodein classjava.lang.Object
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removeAt
protected void removeAt(int index)
removes the mapping at index from the map.
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getValues
public java.lang.Object[] getValues()
Returns the values of the map.- Returns:
- a
Collectionvalue - See Also:
getValues(Object[])
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getValues
public <T> T[] getValues(T[] a)
Return the values of the map; the runtime type of the returned array is that of the specified array.- Parameters:
a- the array into which the elements of this collection are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.- Returns:
- an array containing the elements of this collection
- Throws:
java.lang.ArrayStoreException- the runtime type of the specified array is not a supertype of the runtime type of every element in this collection.java.lang.NullPointerException- if the specified array is null.- See Also:
getValues()
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keys
public byte[] keys()
returns the keys of the map.- Returns:
- a
Setvalue
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keys
public byte[] keys(byte[] a)
returns the keys of the map.- Parameters:
a- the array into which the elements of the list are to be stored, if it is big enough; otherwise, a new array of the same type is allocated for this purpose.- Returns:
- a
Setvalue
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containsValue
public boolean containsValue(V val)
checks for the presence of val in the values of the map.- Parameters:
val- anObjectvalue- Returns:
- a
booleanvalue
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containsKey
public boolean containsKey(byte key)
checks for the present of key in the keys of the map.- Parameters:
key- anbytevalue- Returns:
- a
booleanvalue
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forEachKey
public boolean forEachKey(TByteProcedure procedure)
Executes procedure for each key in the map.- Parameters:
procedure- aTByteProcedurevalue- Returns:
- false if the loop over the keys terminated because the procedure returned false for some key.
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forEachValue
public boolean forEachValue(TObjectProcedure<V> procedure)
Executes procedure for each value in the map.- Parameters:
procedure- aTObjectProcedurevalue- Returns:
- false if the loop over the values terminated because the procedure returned false for some value.
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forEachEntry
public boolean forEachEntry(TByteObjectProcedure<V> procedure)
Executes procedure for each key/value entry in the map.- Parameters:
procedure- aTOByteObjectProcedurevalue- Returns:
- false if the loop over the entries terminated because the procedure returned false for some entry.
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retainEntries
public boolean retainEntries(TByteObjectProcedure<V> procedure)
Retains only those entries in the map for which the procedure returns a true value.- Parameters:
procedure- determines which entries to keep- Returns:
- true if the map was modified.
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transformValues
public void transformValues(TObjectFunction<V,V> function)
Transform the values in this map using function.- Parameters:
function- aTObjectFunctionvalue
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writeExternal
public void writeExternal(java.io.ObjectOutput out) throws java.io.IOException- Specified by:
writeExternalin interfacejava.io.Externalizable- Overrides:
writeExternalin classTHash- Throws:
java.io.IOException
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readExternal
public void readExternal(java.io.ObjectInput in) throws java.io.IOException, java.lang.ClassNotFoundException- Specified by:
readExternalin interfacejava.io.Externalizable- Overrides:
readExternalin classTHash- Throws:
java.io.IOExceptionjava.lang.ClassNotFoundException
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toString
public java.lang.String toString()
- Overrides:
toStringin classjava.lang.Object
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