Package org.eclipse.mat.collect
Class HashMapObjectLong<E>
- java.lang.Object
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- org.eclipse.mat.collect.HashMapObjectLong<E>
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- All Implemented Interfaces:
Serializable
public final class HashMapObjectLong<E> extends Object implements Serializable
A map from Object to long. More efficient than a general map null not allowed as key.- See Also:
- Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description static interface
HashMapObjectLong.Entry<E>
An entry from the map
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Constructor Summary
Constructors Constructor Description HashMapObjectLong()
Create a map of default sizeHashMapObjectLong(int initialCapacity)
Create a map of given size
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Remove all the existing mappings, leaving the capacity unchanged.boolean
containsKey(E key)
find if key is present in mapIterator<HashMapObjectLong.Entry<E>>
entries()
Iterate over all the map entrieslong
get(E key)
Retrieve the value corresponding to the keyObject[]
getAllKeys()
Get all the used keys.<T> T[]
getAllKeys(T[] a)
Get all the used keys.long[]
getAllValues()
Get all the values corresponding to the used keys.boolean
isEmpty()
Is the map emptyIterator<E>
keys()
Get a way of iterating over the keysboolean
put(E key, long value)
Add a mappingboolean
remove(E key)
Remove an mapping from the mapint
size()
The number of mappingsIteratorLong
values()
Get a way of iterating over the values.
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Method Detail
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put
public boolean put(E key, long value)
Add a mapping- Parameters:
key
- the keyvalue
- the corresponding value- Returns:
- true if an entry with the key already exists
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remove
public boolean remove(E key)
Remove an mapping from the map- Parameters:
key
- the key to remove- Returns:
- true if entry was found
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containsKey
public boolean containsKey(E key)
find if key is present in map- Parameters:
key
- the key- Returns:
- true if the key was found
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get
public long get(E key)
Retrieve the value corresponding to the key- Parameters:
key
- the key- Returns:
- the value
- Throws:
NoSuchElementException
- if the key is not found
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getAllKeys
public Object[] getAllKeys()
Get all the used keys. Consider usinggetAllKeys(Object[])
for better type safety- Returns:
- an array of the used keys
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getAllKeys
public <T> T[] getAllKeys(T[] a)
Get all the used keys.- Type Parameters:
T
- the type of the keys- Parameters:
a
- an array of the right type for the output, which will be used if it is big enough, otherwise another array of this type will be allocated.- Returns:
- an array of the used keys
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size
public int size()
The number of mappings- Returns:
- the size of the map
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isEmpty
public boolean isEmpty()
Is the map empty- Returns:
- true if no current mappings
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clear
public void clear()
Remove all the existing mappings, leaving the capacity unchanged.
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keys
public Iterator<E> keys()
Get a way of iterating over the keys- Returns:
- an iterator over the keys
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values
public IteratorLong values()
Get a way of iterating over the values.- Returns:
- an iterator over the values
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entries
public Iterator<HashMapObjectLong.Entry<E>> entries()
Iterate over all the map entries- Returns:
- the iterator over the entries
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getAllValues
public long[] getAllValues()
Get all the values corresponding to the used keys. Duplicate values are possible if they correspond to different keys.- Returns:
- an array of the used values
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