Package gnu.trove.map
Interface TObjectIntMap<K>
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- All Known Implementing Classes:
TObjectIntCustomHashMap
,TObjectIntHashMap
,TSynchronizedObjectIntMap
,TUnmodifiableObjectIntMap
public interface TObjectIntMap<K>
Interface for a primitive map of Object keys and int values.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description int
adjustOrPutValue(K key, int adjust_amount, int put_amount)
Adds an amount to the primitive value mapped to the key if the key is present in the map.boolean
adjustValue(K key, int amount)
Adds an amount to the primitive value mapped to key.void
clear()
Removes all of the mappings from this map (optional operation).boolean
containsKey(java.lang.Object key)
Checks for the present of key in the keys of the map.boolean
containsValue(int value)
Checks for the presence of val in the values of the map.boolean
equals(java.lang.Object o)
Compares the specified object with this map for equality.boolean
forEachEntry(TObjectIntProcedure<? super K> procedure)
Executes procedure for each key/value entry in the map.boolean
forEachKey(TObjectProcedure<? super K> procedure)
Executes procedure for each key in the map.boolean
forEachValue(TIntProcedure procedure)
Executes procedure for each value in the map.int
get(java.lang.Object key)
Retrieves the value for key.int
getNoEntryValue()
Returns the value that will be returned fromget(java.lang.Object)
orput(K, int)
if no entry exists for a given key.int
hashCode()
Returns the hash code value for this map.boolean
increment(K key)
Increments the primitive value mapped to key by 1boolean
isEmpty()
Returns true if this map contains no key-value mappings.TObjectIntIterator<K>
iterator()
Returns a TObjectIntIterator with access to this map's keys and values.java.lang.Object[]
keys()
Returns a copy of the keys of the map as an array.K[]
keys(K[] array)
Returns a copy of the keys of the map as an array.java.util.Set<K>
keySet()
Returns aSet
view of the keys contained in this map.int
put(K key, int value)
Inserts a key/value pair into the map.void
putAll(TObjectIntMap<? extends K> map)
Put all the entries from the given map into this map.void
putAll(java.util.Map<? extends K,? extends java.lang.Integer> m)
Copies all of the mappings from the specified map to this map (optional operation).int
putIfAbsent(K key, int value)
Inserts a key/value pair into the map if the specified key is not already associated with a value.int
remove(java.lang.Object key)
Deletes a key/value pair from the map.boolean
retainEntries(TObjectIntProcedure<? super K> procedure)
Retains only those entries in the map for which the procedure returns a true value.int
size()
Returns the number of key-value mappings in this map.void
transformValues(TIntFunction function)
Transform the values in this map using function.TIntCollection
valueCollection()
Returns aTIntCollection
view of the values contained in this map.int[]
values()
Returns the values of the map as an array of int values.int[]
values(int[] array)
Returns the values of the map using an existing array.
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Method Detail
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getNoEntryValue
int getNoEntryValue()
Returns the value that will be returned fromget(java.lang.Object)
orput(K, int)
if no entry exists for a given key. The default value is generally zero, but can be configured during construction of the collection.- Returns:
- the value that represents a null value in this collection.
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size
int size()
Returns the number of key-value mappings in this map. If the map contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.- Returns:
- the number of key-value mappings in this map
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isEmpty
boolean isEmpty()
Returns true if this map contains no key-value mappings.- Returns:
- true if this map contains no key-value mappings
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containsKey
boolean containsKey(java.lang.Object key)
Checks for the present of key in the keys of the map.
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containsValue
boolean containsValue(int value)
Checks for the presence of val in the values of the map.
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get
int get(java.lang.Object key)
Retrieves the value for key.- Returns:
- the previous value associated with key, or the "no entry" value
if none was found (see
getNoEntryValue()
).
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put
int put(K key, int value)
Inserts a key/value pair into the map.- Returns:
- the previous value associated with key, or the "no entry" value
if none was found (see
getNoEntryValue()
).
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putIfAbsent
int putIfAbsent(K key, int value)
Inserts a key/value pair into the map if the specified key is not already associated with a value.- Parameters:
key
- key with which the specified value is to be associatedvalue
- an int value to be associated with the specified key- Returns:
- the previous value associated with key, or the "no entry" value
if none was found (see
getNoEntryValue()
).
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remove
int remove(java.lang.Object key)
Deletes a key/value pair from the map.- Parameters:
key
- an#k#
value- Returns:
- the previous value associated with key, or the "no entry" value
if none was found (see
getNoEntryValue()
).
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putAll
void putAll(java.util.Map<? extends K,? extends java.lang.Integer> m)
Copies all of the mappings from the specified map to this map (optional operation). The effect of this call is equivalent to that of callingput(k, v)
on this map once for each mapping from key k to value v in the specified map. The behavior of this operation is undefined if the specified map is modified while the operation is in progress.- Parameters:
m
- mappings to be stored in this map- Throws:
java.lang.UnsupportedOperationException
- if the putAll operation is not supported by this mapjava.lang.ClassCastException
- if the class of a key or value in the specified map prevents it from being stored in this mapjava.lang.NullPointerException
- if the specified map is null, or if this map does not permit null keys or values, and the specified map contains null keys or valuesjava.lang.IllegalArgumentException
- if some property of a key or value in the specified map prevents it from being stored in this map
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putAll
void putAll(TObjectIntMap<? extends K> 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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clear
void clear()
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.- Throws:
java.lang.UnsupportedOperationException
- if the clear operation is not supported by this map
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keySet
java.util.Set<K> keySet()
Returns aSet
view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.- Returns:
- a set view of the keys contained in this map
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keys
java.lang.Object[] keys()
Returns a copy of the keys of the map as an array. Changes to the array of keys will not be reflected in the map nor vice-versa.- Returns:
- a copy of the keys of the map as an array.
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keys
K[] keys(K[] array)
Returns a copy of the keys of the map as an array. Changes to the array of keys will not be reflected in the map nor vice-versa.- Parameters:
array
- 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:
- the keys of the map as an array.
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valueCollection
TIntCollection valueCollection()
Returns aTIntCollection
view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. If the map is modified while an iteration over the collection is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via the TIntIterator.remove, TIntCollection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.- Returns:
- a collection view of the values contained in this map
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values
int[] values()
Returns the values of the map as an array of int values. Changes to the array of values will not be reflected in the map nor vice-versa.- Returns:
- the values of the map as an array of int values.
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values
int[] values(int[] array)
Returns the values of the map using an existing array. Changes to the array of values will not be reflected in the map nor vice-versa.- Parameters:
array
- 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:
- the values of the map as an array of int values.
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iterator
TObjectIntIterator<K> iterator()
Returns a TObjectIntIterator with access to this map's keys and values.- Returns:
- a TObjectIntIterator with access to this map's keys and values.
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increment
boolean increment(K key)
Increments the primitive value mapped to key by 1- Parameters:
key
- the key of the value to increment- Returns:
- true if a mapping was found and modified.
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adjustValue
boolean adjustValue(K key, int amount)
Adds an amount to the primitive value mapped to key. If the key does not exist, the map is not modified (key-value is not inserted).- Parameters:
key
- the key of the value to incrementamount
- the amount to add to the value; may be positive, zero, or negative- Returns:
- true if a mapping was found and modified
- See Also:
adjustOrPutValue(Object, int, int)
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adjustOrPutValue
int adjustOrPutValue(K key, int adjust_amount, int put_amount)
Adds an amount to the primitive value mapped to the key if the key is present in the map. Otherwise, the put_amount is put in the map.- Parameters:
key
- the key of the value to incrementadjust_amount
- the amount to add to the value; may be positive, zero, or negativeput_amount
- the value put into the map if the key is not present- Returns:
- the value present in the map after the adjustment or put operation
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forEachKey
boolean forEachKey(TObjectProcedure<? super K> procedure)
Executes procedure for each key in the map.- Parameters:
procedure
- aTObjectProcedure
value- Returns:
- false if the loop over the keys terminated because the procedure returned false for some key.
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forEachValue
boolean forEachValue(TIntProcedure procedure)
Executes procedure for each value in the map.- Parameters:
procedure
- aTIntProcedure
value- Returns:
- false if the loop over the values terminated because the procedure returned false for some value.
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forEachEntry
boolean forEachEntry(TObjectIntProcedure<? super K> procedure)
Executes procedure for each key/value entry in the map.- Parameters:
procedure
- aTOObjectIntProcedure
value- Returns:
- false if the loop over the entries terminated because the procedure returned false for some entry.
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transformValues
void transformValues(TIntFunction function)
Transform the values in this map using function.- Parameters:
function
- aTIntFunction
value
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retainEntries
boolean retainEntries(TObjectIntProcedure<? super K> 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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equals
boolean equals(java.lang.Object o)
Compares the specified object with this map for equality. Returns true if the given object is also a map and the two maps represent the same mappings. More formally, two maps m1 and m2 represent the same mappings if m1.entrySet().equals(m2.entrySet()). This ensures that the equals method works properly across different implementations of the Map interface.- Overrides:
equals
in classjava.lang.Object
- Parameters:
o
- object to be compared for equality with this map- Returns:
- true if the specified object is equal to this map
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hashCode
int hashCode()
Returns the hash code value for this map. The hash code of a map is defined to be the sum of the hash codes of each entry in the map's entrySet() view. This ensures that m1.equals(m2) implies that m1.hashCode()==m2.hashCode() for any two maps m1 and m2, as required by the general contract ofObject.hashCode()
.- Overrides:
hashCode
in classjava.lang.Object
- Returns:
- the hash code value for this map
- See Also:
Object.equals(Object)
,equals(Object)
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