Package de.xima.fc.stage

Class LocalVariables

java.lang.Object

de.xima.fc.stage.LocalVariables

public final class LocalVariables
extends Object

A set of named variables that can grow over time. Alternatively, this class could also be called a staged builder for an n-tuple.

This is intended to be used with CompletionStage to avoid heavy nesting of transformers when values of previous stages are required for dependent stages. For example:

See the JavaDocs for StageChain for an example how this can simplify code with stages a lot.

Since:

8.0.0

Author:

XIMA MEDIA GmbH

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LocalVariables.L1<X1>	A set of one local variables.
static class	LocalVariables.L2<X1,X2>	A set of two local variables.
static class	LocalVariables.L3<X1,X2,X3>	A set of three local variables.
static class	LocalVariables.L4<X1,X2,X3,X4>	A set of four local variables.
static class	LocalVariables.L5<X1,X2,X3,X4,X5>	A set of five local variables.
static class	LocalVariables.L6<X1,X2,X3,X4,X5,X6>	A set of six local variables.
static class	LocalVariables.L7<X1,X2,X3,X4,X5,X6,X7>	A set of seven local variables.
static class	LocalVariables.L8<X1,X2,X3,X4,X5,X6,X7,X8>	A set of eight local variables.
static class	LocalVariables.L9<X1,X2,X3,X4,X5,X6,X7,X8,X9>	A set of nine local variables.

Method Summary

Modifier and Type	Method	Description
static LocalVariables	empty()
static CompletableFuture<LocalVariables>	emptyStage()
<X1> LocalVariables.L1<X1>	next(X1 x1)
<X1,R> StageChain<LocalVariables.L1<X1>,R>	nextChain(StageChain<X1,R> x1)
<X1> CompletionStage<LocalVariables.L1<X1>>	nextStage(CompletionStage<X1> x1)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

next

public <X1> LocalVariables.L1<X1> next(X1 x1)

Type Parameters:

X1 - Type of the next local variable to add.

Parameters:

x1 - The next local variable to add.

Returns:

A set of local variables which includes the new one.

nextChain

public <X1,R> StageChain<LocalVariables.L1<X1>,R> nextChain(StageChain<X1,R> x1)

Type Parameters:

X1 - Type of the next local variable to add.

Parameters:

x1 - A completion stage that resolves to the next local variable to add.

Returns:

A completion stage that resolves to a set of local variables which includes the new one.

nextStage

public <X1> CompletionStage<LocalVariables.L1<X1>> nextStage(CompletionStage<X1> x1)

Type Parameters:

X1 - Type of the next local variable to add.

Parameters:

x1 - A completion stage that resolves to the next local variable to add.

Returns:

A completion stage that resolves to a set of local variables which includes the new one.

empty

public static LocalVariables empty()

Returns:

A new set without any variables.

emptyStage

public static CompletableFuture<LocalVariables> emptyStage()

Returns:

A completion stage for a new set without any variables.