T
- Type held inside closed varpublic class MutableLong extends java.lang.Object implements To<MutableLong>, java.util.function.LongSupplier, java.util.function.LongConsumer, java.util.function.Supplier<java.lang.Long>
String var = "hello";
Runnable r = () -> var ="world";
Won't compile because var is treated as if it is final.
This can be 'worked around' by using a wrapping object or array.
e.g.
Mutable<String> var = Mutable.of("hello");
Runnable r = () -> var.set("world");
Constructor and Description |
---|
MutableLong() |
Modifier and Type | Method and Description |
---|---|
void |
accept(long value) |
static MutableLong |
fromExternal(java.util.function.LongSupplier s,
java.util.function.LongConsumer c)
Construct a MutableLong that gets and sets an external value using the provided Supplier and Consumer
e.g.
|
java.lang.Long |
get() |
long |
getAsLong() |
MutableLong |
mapInput(java.util.function.LongUnaryOperator fn)
Use the supplied function to perform a lazy map operation when get is called
|
<T1> Mutable<T1> |
mapInputToObj(java.util.function.Function<T1,java.lang.Long> fn)
Use the supplied function to perform a lazy map operation when get is called
|
MutableLong |
mapOutput(java.util.function.LongUnaryOperator fn)
Use the supplied function to perform a lazy map operation when get is called
|
<R> Mutable<R> |
mapOutputToObj(java.util.function.Function<java.lang.Long,R> fn)
Use the supplied function to perform a lazy map operation when get is called
|
MutableLong |
mutate(java.util.function.LongFunction<java.lang.Long> varFn) |
static MutableLong |
of(long var)
Create a Mutable variable, which can be mutated inside a Closure
e.g.
|
MutableLong |
set(long var) |
java.util.stream.LongStream |
toLongStream() |
java.util.OptionalLong |
toOptionalLong() |
public static MutableLong of(long var)
Mutable<Integer> num = Mutable.of(20);
Stream.of(1,2,3,4).map(i->i*10).peek(i-> num.mutate(n->n+i)).foreach(System.out::println);
System.out.println(num.get());
//prints 120
var
- Initial value of Mutablepublic static MutableLong fromExternal(java.util.function.LongSupplier s, java.util.function.LongConsumer c)
MutableLong mutable = MutableLong.fromExternal(()->!this.value,val->!this.value);
s
- Supplier of an external valuec
- Consumer that sets an external valuepublic <R> Mutable<R> mapOutputToObj(java.util.function.Function<java.lang.Long,R> fn)
MutableLong mutable = MutableLong.fromExternal(()->!this.value,val->!this.value);
Mutable<Long> withOverride = mutable.mapOutputToObj(b->{
if(override)
return 10.0;
return b;
});
fn
- Map function to be applied to the result when get is calledpublic <T1> Mutable<T1> mapInputToObj(java.util.function.Function<T1,java.lang.Long> fn)
MutableLong mutable = MutableLong.fromExternal(()->!this.value,val->!this.value);
Mutable<Long> withOverride = mutable.mapInputToObj(b->{
if(override)
return 10.0;
return b;
});
fn
- Map function to be applied to the input when set is calledpublic MutableLong mapOutput(java.util.function.LongUnaryOperator fn)
MutableLong mutable = MutableLong.fromExternal(()->!this.value,val->!this.value);
MutableLong withOverride = mutable.mapOutput(b->{
if(override)
return 10.0;
return b;
});
fn
- Map function to be applied to the result when get is calledpublic MutableLong mapInput(java.util.function.LongUnaryOperator fn)
MutableLong mutable = MutableLong.fromExternal(()->!this.value,val->!this.value);
MutableLong withOverride = mutable.mapInput(b->{
if(override)
return 10.0;
return b;
});
fn
- Map function to be applied to the input when set is calledpublic long getAsLong()
getAsLong
in interface java.util.function.LongSupplier
public MutableLong set(long var)
var
- New valuepublic MutableLong mutate(java.util.function.LongFunction<java.lang.Long> varFn)
varFn
- New valuepublic java.util.OptionalLong toOptionalLong()
public java.util.stream.LongStream toLongStream()
public java.lang.Long get()
get
in interface java.util.function.Supplier<java.lang.Long>
public void accept(long value)
accept
in interface java.util.function.LongConsumer