AbstractObject2DoubleFunction (fastutil 8.5.15)

java.lang.Object
- it.unimi.dsi.fastutil.objects.AbstractObject2DoubleFunction<K>

All Implemented Interfaces:

Function<K,java.lang.Double>, Object2DoubleFunction<K>, java.io.Serializable, java.util.function.Function<K,java.lang.Double>, java.util.function.ToDoubleFunction<K>

Direct Known Subclasses:

AbstractObject2DoubleMap, Object2DoubleFunctions.EmptyFunction, Object2DoubleFunctions.Singleton, Object2DoubleFunctions.UnmodifiableFunction
```
public abstract class AbstractObject2DoubleFunction<K>
extends java.lang.Object
implements Object2DoubleFunction<K>, java.io.Serializable
```
An abstract class providing basic methods for functions implementing a type-specific interface.
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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`defaultReturnValue()`	Gets the default return value.
`void`	`defaultReturnValue(double rv)`	Sets the default return value (optional operation).

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

Methods inherited from interface it.unimi.dsi.fastutil.Function
apply, clear, containsKey, size

Methods inherited from interface java.util.function.Function
compose

Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2DoubleFunction
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsDouble, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, getDouble, getOrDefault, getOrDefault, put, put, remove, removeDouble

- Method Detail
  - defaultReturnValue
```
public void defaultReturnValue(double rv)
```
    Description copied from interface: Object2DoubleFunction
    
    Sets the default return value (optional operation). 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 Object2DoubleFunction<K>
    
    Parameters:
    
    rv - the new default return value.
    
    See Also:
    
    Object2DoubleFunction.defaultReturnValue()
  - defaultReturnValue
```
public double defaultReturnValue()
```
    Description copied from interface: Object2DoubleFunction
    
    Gets the default return value.
    This default implementation just return the default null value of the type (null for objects, 0 for scalars, false for Booleans).
    
    Specified by:
    
    defaultReturnValue in interface Object2DoubleFunction<K>
    
    Returns:
    
    the current default return value.