H2 Database Engine 2.3.232 · org.h2.util.SoftValuesHashMap

Modifier and Type	Class and Description
private static class	SoftValuesHashMap.SoftValue<T> A soft reference that has a hard reference to the key.

Modifier and Type	Field and Description
private final Map<K, SoftValuesHashMap.SoftValue<V>>	map
private final ReferenceQueue<V>	queue

Access	Constructor and Description
public	SoftValuesHashMap()

Method Summary

Modifier and Type	Method and Description
public void	clear() Overrides java.util.AbstractMap.clear. Implements java.util.Map.clear. Removes all of the mappings from this map (optional operation).
public Set<Map.Entry<K, V>>	entrySet() Implements abstract java.util.AbstractMap.entrySet. Implements java.util.Map.entrySet. Returns a `Set` view of the mappings contained in this map.
public V	get(Object the key whose associated value is to be returned key) Overrides java.util.AbstractMap.get. Implements java.util.Map.get. Returns the value to which the specified key is mapped, or `null` if this map contains no mapping for the key.
private void	processQueue()
public V	Returns: null or the old object. put(K the key key, V the value value) Overrides java.util.AbstractMap.put. Implements java.util.Map.put. Store the object.
public V	Returns: null or the old object remove(Object the key key) Overrides java.util.AbstractMap.remove. Implements java.util.Map.remove. Remove an object.

Inherited from java.util.AbstractMap:: clone containsKey containsValue equals hashCode isEmpty keySet putAll size toString values

map	back to summary
private final Map<K, SoftValuesHashMap.SoftValue<V>> map

queue	back to summary
private final ReferenceQueue<V> queue

SoftValuesHashMap	back to summary
public SoftValuesHashMap()

Method Detail

clear	back to summary
public void clear() Overrides java.util.AbstractMap.clear. Implements java.util.Map.clear. Doc from java.util.AbstractMap.clear. Removes all of the mappings from this map (optional operation). The map will be empty after this call returns. Annotations @Override

clear

back to summary

public void clear()

Overrides java.util.AbstractMap.clear.

Implements java.util.Map.clear.

Doc from java.util.AbstractMap.clear.

Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.

Annotations

@Override

entrySet back to summary

entrySet	back to summary
public Set<Map.Entry<K, V>> entrySet() Implements abstract java.util.AbstractMap.entrySet. Implements java.util.Map.entrySet. Doc from java.util.Map.entrySet. Returns a `Set` view of the mappings 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, or through the `setValue` operation on a map entry returned by the iterator) 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:Set<Map.Entry<K, V>> a set view of the mappings contained in this map Annotations @Override

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

Implements abstract java.util.AbstractMap.entrySet.

Implements java.util.Map.entrySet.

Doc from java.util.Map.entrySet.

Returns a Set view of the mappings 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, or through the setValue operation on a map entry returned by the iterator) 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:Set<Map.Entry<K, V>>

a set view of the mappings contained in this map

Annotations

@Override

get back to summary

get	back to summary
public V get(Object key) Overrides java.util.AbstractMap.get. Implements java.util.Map.get. Doc from java.util.AbstractMap.get. Returns the value to which the specified key is mapped, or `null` if this map contains no mapping for the key. More formally, if this map contains a mapping from a key `k` to a value `v` such that `Objects.equals(key, k)`, then this method returns `v`; otherwise it returns `null`. (There can be at most one such mapping.) If this map permits null values, then a return value of `null` does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to `null`. The `containsKey` operation may be used to distinguish these two cases. Parameters key:Object Doc from java.util.Map.get. the key whose associated value is to be returned Returns:V Doc from java.util.Map.get. the value to which the specified key is mapped, or `null` if this map contains no mapping for the key Annotations @Override

public V get(Object key)

Overrides java.util.AbstractMap.get.

Implements java.util.Map.get.

Doc from java.util.AbstractMap.get.

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

More formally, if this map contains a mapping from a key k to a value v such that Objects.equals(key, k), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

If this map permits null values, then a return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. The containsKey operation may be used to distinguish these two cases.

Parameters

key:Object

Doc from java.util.Map.get.

the key whose associated value is to be returned

Returns:V

Doc from java.util.Map.get.

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

Annotations

@Override

processQueue	back to summary
private void processQueue() Annotations @SuppressWarnings:unchecked

put	back to summary
public V put(K key, V value) Overrides java.util.AbstractMap.put. Implements java.util.Map.put. Store the object. The return value of this method is null or a SoftReference. Parameters key:K the key value:V the value Returns:V null or the old object. Annotations @Override

put

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public V put(K key, V value)

Overrides java.util.AbstractMap.put.

Implements java.util.Map.put.

Store the object. The return value of this method is null or a SoftReference.

Parameters

key:K: the key
value:V: the value

Returns:V

null or the old object.

Annotations

@Override

remove	back to summary
public V remove(Object key) Overrides java.util.AbstractMap.remove. Implements java.util.Map.remove. Remove an object. Parameters key:Object the key Returns:V null or the old object Annotations @Override

remove

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public V remove(Object key)

Overrides java.util.AbstractMap.remove.

Implements java.util.Map.remove.

Remove an object.

Parameters

key:Object: the key

Returns:V

null or the old object

Annotations

@Override

public Class SoftValuesHashMap<K, V>

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private Class SoftValuesHashMap.SoftValue<T>

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail