org.corfudb.runtime.collections

Class SMRMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

org.corfudb.runtime.collections.SMRMap<K,V>

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>, ISMRMap<K,V>, ISMRObject

Deprecated.

@Deprecated
public class SMRMap<K,V>
extends HashMap<K,V>
implements ISMRMap<K,V>

Created by mwei on 1/7/16.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface org.corfudb.runtime.collections.ISMRMap

ISMRMap.UndoNullable

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
SMRMap() Deprecated.

Method Summary

Modifier and Type	Method and Description
V	compute(K key, BiFunction<? super K,? super V,? extends V> remappingFunction) Deprecated. Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
V	computeIfAbsent(K key, Function<? super K,? extends V> mappingFunction) Deprecated. If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.
V	computeIfPresent(K key, BiFunction<? super K,? super V,? extends V> remappingFunction) Deprecated. If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.
Set<Map.Entry<K,V>>	entrySet() Deprecated. Returns a Set view of the mappings contained in this map.
void	forEach(BiConsumer<? super K,? super V> action) Deprecated. Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.
V	getOrDefault(Object key, V defaultValue) Deprecated. Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.
Set<K>	keySet() Deprecated. Returns a Set view of the keys contained in this map.
V	merge(K key, V value, BiFunction<? super V,? super V,? extends V> remappingFunction) Deprecated. If the specified key is not already associated with a value or is associated with null, associates it with the given non-null value.
V	putIfAbsent(K key, V value) Deprecated. If the specified key is not already associated with a value (or is mapped to null) associates it with the given value and returns null, else returns the current value.
boolean	remove(Object key, Object value) Deprecated. Removes the entry for the specified key only if it is currently mapped to the specified value.
V	replace(K key, V value) Deprecated. Replaces the entry for the specified key only if it is currently mapped to some value.
boolean	replace(K key, V oldValue, V newValue) Deprecated. Replaces the entry for the specified key only if currently mapped to the specified value.
void	replaceAll(BiFunction<? super K,? super V,? extends V> function) Deprecated. Replaces each entry's value with the result of invoking the given function on that entry until all entries have been processed or the function throws an exception.
List<V>	scanAndFilter(Predicate<? super V> p) Deprecated. Returns a filtered List view of the values contained in this map.
Collection<Map.Entry<K,V>>	scanAndFilterByEntry(Predicate<? super Map.Entry<K,V>> entryPredicate) Deprecated. Returns a Collection filtered by entries (keys and/or values).
Collection<V>	values() Deprecated. Returns a Collection view of the values contained in this map.

Methods inherited from class java.util.HashMap

clear, clone, containsKey, containsValue, get, isEmpty, put, putAll, remove, size

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.corfudb.runtime.collections.ISMRMap

blindPut, clear, containsKey, containsValue, get, isEmpty, put, putAll, putAllConflictFunction, remove, size, undoPut, undoPutAll, undoPutAllRecord, undoPutRecord, undoRemove, undoRemoveRecord

Methods inherited from interface java.util.Map

equals, hashCode

Methods inherited from interface org.corfudb.runtime.collections.ISMRObject

equals, hashCode, toString

Constructor Detail

SMRMap

public SMRMap()

Deprecated.

Method Detail

keySet

public Set<K> keySet()

Deprecated.

Returns a Set view of the keys contained in this map. It does not support the add or addAll operations.

Specified by:

keySet in interface Map<K,V>

Specified by:

keySet in interface ISMRMap<K,V>

Overrides:

keySet in class HashMap<K,V>

Returns:

a set view of the keys contained in this map

values

public Collection<V> values()

Deprecated.

Returns a Collection view of the values contained in this map. It does not support the add or addAll operations.

Specified by:

values in interface Map<K,V>

Specified by:

values in interface ISMRMap<K,V>

Overrides:

values in class HashMap<K,V>

Returns:

a view of the values contained in this map

scanAndFilter

public List<V> scanAndFilter(Predicate<? super V> p)

Deprecated.

Returns a filtered List view of the values contained in this map. This method has a memory/CPU advantage over the map iterators as no deep copy is actually performed.

Parameters:

p - java predicate (function to evaluate)

Returns:

a view of the values contained in this map meeting the predicate condition.

scanAndFilterByEntry

public Collection<Map.Entry<K,V>> scanAndFilterByEntry(Predicate<? super Map.Entry<K,V>> entryPredicate)

Deprecated.

Returns a Collection filtered by entries (keys and/or values). This method has a memory/CPU advantage over the map iterators as no deep copy is actually performed.

Parameters:

entryPredicate - java predicate (function to evaluate)

Returns:

a view of the entries contained in this map meeting the predicate condition.

entrySet

public Set<Map.Entry<K,V>> entrySet()

Deprecated.

Returns a Set view of the mappings contained in this map. It does not support the add or addAll operations.

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in interface ISMRMap<K,V>

Overrides:

entrySet in class HashMap<K,V>

Returns:

a set view of the mappings contained in this map

getOrDefault

public V getOrDefault(Object key,
                      V defaultValue)

Deprecated.

Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.

Specified by:

getOrDefault in interface Map<K,V>

Overrides:

getOrDefault in class HashMap<K,V>

Parameters:

key - the key whose associated value is to be returned

defaultValue - the default mapping of the key

Returns:

the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key

Throws:

ClassCastException - if the key is of an inappropriate type for this map (optional)

NullPointerException - if the specified key is null and this map does not permit null keys (optional)

Since:

1.8

forEach

public void forEach(BiConsumer<? super K,? super V> action)

Deprecated.

Performs the given action for each entry in this map until all entries have been processed or the action throws an exception. Unless otherwise specified by the implementing class, actions are performed in the order of entry set iteration (if an iteration order is specified.) Exceptions thrown by the action are relayed to the caller.

Specified by:

forEach in interface Map<K,V>

Overrides:

forEach in class HashMap<K,V>

Parameters:

action - The action to be performed for each entry

Throws:

NullPointerException - if the specified action is null

ConcurrentModificationException - if an entry is found to be removed during iteration

Since:

1.8

replaceAll

public void replaceAll(BiFunction<? super K,? super V,? extends V> function)

Deprecated.

Replaces each entry's value with the result of invoking the given function on that entry until all entries have been processed or the function throws an exception. Exceptions thrown by the function are relayed to the caller.

Specified by:

replaceAll in interface Map<K,V>

Overrides:

replaceAll in class HashMap<K,V>

Parameters:

function - the function to apply to each entry

Throws:

UnsupportedOperationException - if the set operation is not supported by this map's entry set iterator.

ClassCastException - if the class of a replacement value prevents it from being stored in this map

NullPointerException - if the specified function is null, or the specified replacement value is null, and this map does not permit null values

ClassCastException - if a replacement value is of an inappropriate type for this map (optional)

NullPointerException - if function or a replacement value is null, and this map does not permit null keys or values (optional)

IllegalArgumentException - if some property of a replacement value prevents it from being stored in this map (optional)

ConcurrentModificationException - if an entry is found to be removed during iteration

Since:

1.8

putIfAbsent

public V putIfAbsent(K key,
                     V value)

Deprecated.

If the specified key is not already associated with a value (or is mapped to null) associates it with the given value and returns null, else returns the current value.

Specified by:

putIfAbsent in interface Map<K,V>

Overrides:

putIfAbsent in class HashMap<K,V>

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

Throws:

UnsupportedOperationException - if the put operation is not supported by this map (optional)

ClassCastException - if the key or value is of an inappropriate type for this map (optional)

NullPointerException - if the specified key or value is null, and this map does not permit null keys or values (optional)

IllegalArgumentException - if some property of the specified key or value prevents it from being stored in this map (optional)

Since:

1.8

remove

public boolean remove(Object key,
                      Object value)

Deprecated.

Removes the entry for the specified key only if it is currently mapped to the specified value.

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class HashMap<K,V>

Parameters:

key - key with which the specified value is associated

value - value expected to be associated with the specified key

Returns:

true if the value was removed

Throws:

UnsupportedOperationException - if the remove operation is not supported by this map (optional)

ClassCastException - if the key or value is of an inappropriate type for this map (optional)

NullPointerException - if the specified key or value is null, and this map does not permit null keys or values (optional)

Since:

1.8

replace

public boolean replace(K key,
                       V oldValue,
                       V newValue)

Deprecated.

Replaces the entry for the specified key only if currently mapped to the specified value.

Specified by:

replace in interface Map<K,V>

Overrides:

replace in class HashMap<K,V>

Parameters:

key - key with which the specified value is associated

oldValue - value expected to be associated with the specified key

newValue - value to be associated with the specified key

Returns:

true if the value was replaced

Throws:

UnsupportedOperationException - if the put operation is not supported by this map (optional)

ClassCastException - if the class of a specified key or value prevents it from being stored in this map

NullPointerException - if a specified key or newValue is null, and this map does not permit null keys or values

NullPointerException - if oldValue is null and this map does not permit null values (optional)

IllegalArgumentException - if some property of a specified key or value prevents it from being stored in this map

Since:

1.8

replace

public V replace(K key,
                 V value)

Deprecated.

Replaces the entry for the specified key only if it is currently mapped to some value.

Specified by:

replace in interface Map<K,V>

Overrides:

replace in class HashMap<K,V>

Parameters:

key - key with which the specified value is associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

Throws:

UnsupportedOperationException - if the put operation is not supported by this map (optional)

ClassCastException - if the class of the specified key or value prevents it from being stored in this map (optional)

NullPointerException - if the specified key or value is null, and this map does not permit null keys or values

IllegalArgumentException - if some property of the specified key or value prevents it from being stored in this map

Since:

1.8

computeIfAbsent

public V computeIfAbsent(K key,
                         Function<? super K,? extends V> mappingFunction)

Deprecated.

If the specified key is not already associated with a value (or is mapped to null), attempts to compute its value using the given mapping function and enters it into this map unless null.

If the function returns null no mapping is recorded. If the function itself throws an (unchecked) exception, the exception is rethrown, and no mapping is recorded. The most common usage is to construct a new object serving as an initial mapped value or memoized result, as in:

 
 map.computeIfAbsent(key, k -> new Value(f(k)));
 

Or to implement a multi-value map, Map<K,Collection<V>>, supporting multiple values per key:

 
 map.computeIfAbsent(key, k -> new HashSet<V>()).add(v);
 

Specified by:

computeIfAbsent in interface Map<K,V>

Overrides:

computeIfAbsent in class HashMap<K,V>

Parameters:

key - key with which the specified value is to be associated

mappingFunction - the function to compute a value

Returns:

the current (existing or computed) value associated with the specified key, or null if the computed value is null

Throws:

NullPointerException - if the specified key is null and this map does not support null keys, or the mappingFunction is null

UnsupportedOperationException - if the put operation is not supported by this map (optional)

ClassCastException - if the class of the specified key or value prevents it from being stored in this map (optional)

Since:

1.8

computeIfPresent

public V computeIfPresent(K key,
                          BiFunction<? super K,? super V,? extends V> remappingFunction)

Deprecated.

If the value for the specified key is present and non-null, attempts to compute a new mapping given the key and its current mapped value.

If the function returns null, the mapping is removed. If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

Specified by:

computeIfPresent in interface Map<K,V>

Overrides:

computeIfPresent in class HashMap<K,V>

Parameters:

key - key with which the specified value is to be associated

remappingFunction - the function to compute a value

Returns:

the new value associated with the specified key, or null if none

Throws:

NullPointerException - if the specified key is null and this map does not support null keys, or the remappingFunction is null

UnsupportedOperationException - if the put operation is not supported by this map (optional)

ClassCastException - if the class of the specified key or value prevents it from being stored in this map (optional)

Since:

1.8

compute

public V compute(K key,
                 BiFunction<? super K,? super V,? extends V> remappingFunction)

Deprecated.

Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping). For example, to either create or append a String msg to a value mapping:

 
 map.compute(key, (k, v) -> (v == null) ? msg : v.concat(msg))

(Method merge() is often simpler to use for such purposes.)

If the function returns null, the mapping is removed (or remains absent if initially absent). If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

Specified by:

compute in interface Map<K,V>

Overrides:

compute in class HashMap<K,V>

Parameters:

key - key with which the specified value is to be associated

remappingFunction - the function to compute a value

Returns:

the new value associated with the specified key, or null if none

Throws:

NullPointerException - if the specified key is null and this map does not support null keys, or the remappingFunction is null

UnsupportedOperationException - if the put operation is not supported by this map (optional)

ClassCastException - if the class of the specified key or value prevents it from being stored in this map (optional)

Since:

1.8

merge

public V merge(K key,
               V value,
               BiFunction<? super V,? super V,? extends V> remappingFunction)

Deprecated.

If the specified key is not already associated with a value or is associated with null, associates it with the given non-null value. Otherwise, replaces the associated value with the results of the given remapping function, or removes if the result is null. This method may be of use when combining multiple mapped values for a key. For example, to either create or append a String msg to a value mapping:

 
 map.merge(key, msg, String::concat)
 

If the function returns null the mapping is removed. If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

Specified by:

merge in interface Map<K,V>

Overrides:

merge in class HashMap<K,V>

Parameters:

key - key with which the resulting value is to be associated

value - the non-null value to be merged with the existing value associated with the key or, if no existing value or a null value is associated with the key, to be associated with the key

remappingFunction - the function to recompute a value if present

Returns:

the new value associated with the specified key, or null if no value is associated with the key

Throws:

UnsupportedOperationException - if the put operation is not supported by this map (optional)

ClassCastException - if the class of the specified key or value prevents it from being stored in this map (optional)

NullPointerException - if the specified key is null and this map does not support null keys or the value or remappingFunction is null

Since:

1.8