Package it.unimi.dsi.fastutil.longs
Class AbstractLong2DoubleFunction
- java.lang.Object
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- it.unimi.dsi.fastutil.longs.AbstractLong2DoubleFunction
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- All Implemented Interfaces:
Function<java.lang.Long,java.lang.Double>
,Long2DoubleFunction
,java.io.Serializable
,java.util.function.Function<java.lang.Long,java.lang.Double>
,java.util.function.LongToDoubleFunction
- Direct Known Subclasses:
AbstractLong2DoubleMap
,Long2DoubleFunctions.EmptyFunction
,Long2DoubleFunctions.Singleton
,Long2DoubleFunctions.UnmodifiableFunction
public abstract class AbstractLong2DoubleFunction extends java.lang.Object implements Long2DoubleFunction, 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-specificcontainsKey()
, andsize()
methods.- See Also:
- Serialized Form
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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
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Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2DoubleFunction
applyAsDouble, containsKey, containsKey, get, get, put, put, remove, remove
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Method Detail
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defaultReturnValue
public void defaultReturnValue(double rv)
Description copied from interface:Long2DoubleFunction
Sets the default return value (optional operation). This value must be returned by type-specific versions ofget()
,put()
andremove()
to denote that the map does not contain the specified key. It must be 0/false
/null
by default.- Specified by:
defaultReturnValue
in interfaceLong2DoubleFunction
- Parameters:
rv
- the new default return value.- See Also:
Long2DoubleFunction.defaultReturnValue()
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defaultReturnValue
public double defaultReturnValue()
Description copied from interface:Long2DoubleFunction
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 interfaceLong2DoubleFunction
- Returns:
- the current default return value.
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