AbstractDouble2DoubleFunction (fastutil 6.5.4)

java.lang.Object
- it.unimi.dsi.fastutil.doubles.AbstractDouble2DoubleFunction

All Implemented Interfaces:

Double2DoubleFunction, Function<java.lang.Double,java.lang.Double>, java.io.Serializable

Direct Known Subclasses:

AbstractDouble2DoubleMap, Double2DoubleFunctions.EmptyFunction, Double2DoubleFunctions.Singleton, Double2DoubleFunctions.SynchronizedFunction, Double2DoubleFunctions.UnmodifiableFunction
```
public abstract class AbstractDouble2DoubleFunction
extends java.lang.Object
implements Double2DoubleFunction, java.io.Serializable
```
An abstract class providing basic methods for functions implementing a type-specific interface.
Optional operations just throw an UnsupportedOperationException. Generic versions of accessors delegate to the corresponding type-specific counterparts following the interface rules (they take care of returning null on a missing key).
This class handles directly a default return value (including methods to access it). Instances of classes inheriting from this class have just to return defRetValue to denote lack of a key in type-specific methods. The value is serialized.
Implementing subclasses have just to provide type-specific get(), type-specific containsKey(), and size() methods.

See Also:
Serialized Form

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`clear()` Removes all associations from this function (optional operation).
`boolean`	`containsKey(java.lang.Object ok)` Returns true if this function contains a mapping for the specified key.
`double`	`defaultReturnValue()` Gets the default return value.
`void`	`defaultReturnValue(double rv)` Sets the default return value.
`java.lang.Double`	`get(java.lang.Object ok)` Delegates to the corresponding type-specific method, taking care of returning `null` on a missing key.
`double`	`put(double key, double value)` Adds a pair to the map.
`java.lang.Double`	`put(java.lang.Double ok, java.lang.Double ov)` Delegates to the corresponding type-specific method, taking care of returning `null` on a missing key.
`double`	`remove(double key)` Removes the mapping with the given key.
`java.lang.Double`	`remove(java.lang.Object ok)` Delegates to the corresponding type-specific method, taking care of returning `null` on a missing key.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2DoubleFunction
containsKey, get

Methods inherited from interface it.unimi.dsi.fastutil.Function
size

- Method Detail
  - defaultReturnValue
```
public void defaultReturnValue(double rv)
```
    Description copied from interface: Double2DoubleFunction
    
    Sets the default return value. This value must be returned by type-specific versions of get(), put() and remove() to denote that the map does not contain the specified key. It must be 0/false/null by default.
    
    Specified by:
    
    defaultReturnValue in interface Double2DoubleFunction
    
    Parameters:
    rv - the new default return value.
    See Also:
    Double2DoubleFunction.defaultReturnValue()
  - defaultReturnValue
```
public double defaultReturnValue()
```
    Description copied from interface: Double2DoubleFunction
    
    Gets the default return value.
    
    Specified by:
    
    defaultReturnValue in interface Double2DoubleFunction
    
    Returns:
    the current default return value.
  - put
```
public double put(double key,
         double value)
```
    Description copied from interface: Double2DoubleFunction
    
    Adds a pair to the map.
    
    Specified by:
    
    put in interface Double2DoubleFunction
    
    Parameters:
    key - the key.
    value - the value.
    
    Returns:
    the old value, or the default return value if no value was present for the given key.
    See Also:
    Function.put(Object,Object)
  - remove
```
public double remove(double key)
```
    Description copied from interface: Double2DoubleFunction
    
    Removes the mapping with the given key.
    
    Specified by:
    
    remove in interface Double2DoubleFunction
    
    Returns:
    the old value, or the default return value if no value was present for the given key.
    See Also:
    Function.remove(Object)
  - clear
```
public void clear()
```
    Description copied from interface: Function
    
    Removes all associations from this function (optional operation).
    
    Specified by:
    
    clear in interface Function<java.lang.Double,java.lang.Double>
    
    See Also:
    Map.clear()
  - containsKey
```
public boolean containsKey(java.lang.Object ok)
```
    Description copied from interface: Function
    
    Returns true if this function contains a mapping for the specified key.
    Note that for some kind of functions (e.g., hashes) this method will always return true.
    
    Specified by:
    
    containsKey in interface Function<java.lang.Double,java.lang.Double>
    
    Parameters:
    ok - the key.
    
    Returns:
    true if this function associates a value to key.
    See Also:
    Map.containsKey(Object)
  - get
```
public java.lang.Double get(java.lang.Object ok)
```
    Delegates to the corresponding type-specific method, taking care of returning null on a missing key.
    This method must check whether the provided key is in the map using containsKey(). Thus, it probes the map twice. Implementors of subclasses should override it with a more efficient method.
    
    Specified by:
    
    get in interface Function<java.lang.Double,java.lang.Double>
    
    Parameters:
    ok - the key.
    
    Returns:
    the corresponding value, or null if no value was present for the given key.
    See Also:
    Map.get(Object)
  - put
```
public java.lang.Double put(java.lang.Double ok,
                   java.lang.Double ov)
```
    Delegates to the corresponding type-specific method, taking care of returning null on a missing key.
    This method must check whether the provided key is in the map using containsKey(). Thus, it probes the map twice. Implementors of subclasses should override it with a more efficient method.
    
    Specified by:
    
    put in interface Function<java.lang.Double,java.lang.Double>
    
    Parameters:
    ok - the key.
    ov - the value.
    
    Returns:
    the old value, or null if no value was present for the given key.
    See Also:
    Map.put(Object,Object)
  - remove
```
public java.lang.Double remove(java.lang.Object ok)
```
    Delegates to the corresponding type-specific method, taking care of returning null on a missing key.
    This method must check whether the provided key is in the map using containsKey(). Thus, it probes the map twice. Implementors of subclasses should override it with a more efficient method.
    
    Specified by:
    
    remove in interface Function<java.lang.Double,java.lang.Double>
    
    Returns:
    the old value, or null if no value was present for the given key.
    See Also:
    Map.remove(Object)

Class AbstractDouble2DoubleFunction

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2DoubleFunction

Methods inherited from interface it.unimi.dsi.fastutil.Function

Method Detail

defaultReturnValue

defaultReturnValue

put

remove

clear

containsKey

get

put

remove