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High Performance Primitive Collections: data structures (maps, sets, lists, stacks, queues) generated for combinations of object and primitive types to conserve JVM memory and speed up execution.
package com.carrotsearch.hppc;
import com.carrotsearch.hppc.cursors.IntFloatCursor;
/**
* An associative container with unique binding from keys to a single value.
*/
@com.carrotsearch.hppc.Generated(
date = "2018-05-21T12:24:06+0200",
value = "KTypeVTypeMap.java")
public interface IntFloatMap extends IntFloatAssociativeContainer {
/**
* @return Returns the value associated with the given key or the default
* value for the value type, if the key is not associated with any
* value. For numeric value types, this default value is 0, for
* object types it is {@code null}.
*/
public float get(int key);
/**
* @return Returns the value associated with the given key or the provided
* default value if the key is not associated with any value.
*/
public float getOrDefault(int key, float defaultValue);
/**
* Place a given key and value in the container.
*
* @return The value previously stored under the given key in the map is
* returned.
*/
public float put(int key, float value);
/**
* Puts all keys from another container to this map, replacing the values of
* existing keys, if such keys are present.
*
* @return Returns the number of keys added to the map as a result of this
* call (not previously present in the map). Values of existing keys
* are overwritten.
*/
public int putAll(IntFloatAssociativeContainer container);
/**
* Puts all keys from an iterable cursor to this map, replacing the values of
* existing keys, if such keys are present.
*
* @return Returns the number of keys added to the map as a result of this
* call (not previously present in the map). Values of existing keys
* are overwritten.
*/
public int putAll(Iterable iterable);
/**
* If key exists, putValue is inserted into the map,
* otherwise any existing value is incremented by additionValue.
*
* @param key
* The key of the value to adjust.
* @param putValue
* The value to put if key does not exist.
* @param incrementValue
* The value to add to the existing value if key exists.
* @return Returns the current value associated with key (after
* changes).
*/
public float putOrAdd(int key, float putValue, float incrementValue);
/**
* An equivalent of calling
*
*
* putOrAdd(key, additionValue, additionValue);
*
*
* @param key
* The key of the value to adjust.
* @param additionValue
* The value to put or add to the existing value if key
* exists.
* @return Returns the current value associated with key (after
* changes).
*/
public float addTo(int key, float additionValue);
/**
* Remove all values at the given key. The default value for the key type is
* returned if the value does not exist in the map.
*/
public float remove(int key);
/**
* Compares the specified object with this set for equality. Returns
* true if and only if the specified object is also a
* {@link IntFloatMap} and both objects contains exactly the same key-value
* pairs.
*/
public boolean equals(Object obj);
/**
* @return A hash code of elements stored in the map. The hash code is defined
* as a sum of hash codes of keys and values stored within the set).
* Because sum is commutative, this ensures that different order of
* elements in a set does not affect the hash code.
*/
public int hashCode();
/**
* Returns a logical "index" of a given key that can be used to speed up
* follow-up value setters or getters in certain scenarios (conditional
* logic).
*
* The semantics of "indexes" are not strictly defined. Indexes may (and
* typically won't be) contiguous.
*
* The index is valid only between map modifications (it will not be affected
* by read-only operations like iteration or value retrievals).
*
* @see #indexExists
* @see #indexGet
* @see #indexInsert
* @see #indexReplace
*
* @param key
* The key to locate in the map.
* @return A non-negative value of the logical "index" of the key in the map
* or a negative value if the key did not exist.
*/
public int indexOf(int key);
/**
* @see #indexOf
*
* @param index
* The index of a given key, as returned from {@link #indexOf}.
* @return Returns true if the index corresponds to an existing
* key or false otherwise. This is equivalent to checking whether the
* index is a positive value (existing keys) or a negative value
* (non-existing keys).
*/
public boolean indexExists(int index);
/**
* Returns the value associated with an existing key.
*
* @see #indexOf
*
* @param index
* The index of an existing key.
* @return Returns the value currently associated with the key.
* @throws AssertionError
* If assertions are enabled and the index does not correspond to an
* existing key.
*/
public float indexGet(int index);
/**
* Replaces the value associated with an existing key and returns any previous
* value stored for that key.
*
* @see #indexOf
*
* @param index
* The index of an existing key.
* @return Returns the previous value associated with the key.
* @throws AssertionError
* If assertions are enabled and the index does not correspond to an
* existing key.
*/
public float indexReplace(int index, float newValue);
/**
* Inserts a key-value pair for a key that is not present in the map. This
* method may help in avoiding double recalculation of the key's hash.
*
* @see #indexOf
*
* @param index
* The index of a previously non-existing key, as returned from
* {@link #indexOf}.
* @throws AssertionError
* If assertions are enabled and the index corresponds to an
* existing key.
*/
public void indexInsert(int index, int key, float value);
/**
* Clear all keys and values in the container.
*
* @see #release()
*/
public void clear();
/**
* Removes all elements from the collection and additionally releases any
* internal buffers. Typically, if the object is to be reused, a simple
* {@link #clear()} should be a better alternative since it'll avoid
* reallocation.
*
* @see #clear()
*/
public void release();
/**
* Visually depict the distribution of keys.
*
* @param characters
* The number of characters to "squeeze" the entire buffer into.
* @return Returns a sequence of characters where '.' depicts an empty
* fragment of the internal buffer and 'X' depicts full or nearly full
* capacity within the buffer's range and anything between 1 and 9 is between.
*/
public String visualizeKeyDistribution(int characters);
}