Class JctFileManagerConfigurerChain

java.lang.Object

io.github.ascopes.jct.filemanagers.config.JctFileManagerConfigurerChain

public final class JctFileManagerConfigurerChain
extends Object

A collection representing a chain of configurers to apply to a file manager.

This is used to provide a set of ordered configuration operations to perform on newly created file managers to prepare them for consumption in test cases. Common operations may include:

• Automatically configuring the annotation processor paths;
• Creating empty locations to prevent compilers raising exceptions;
• Installing logging interceptors.

When configuring a file manager with this chain, each configurer is invoked in the provided order. Configurers themselves must return a file manager as a result of the configure operation. This operation may return the input file manager if the operation mutated the input, or it may return a different file manager instance. In the latter case, subsequent configuration operations internally will use the new file manager. The last returned file manager in the chain will be used as the final returned result. This enables configurers to wrap file managers in proxies or delegating implementations to intercept or override existing behaviours.

This class is not thread-safe.

Since:

0.0.1

Author:

Ashley Scopes

Constructor Summary

Constructors

Constructor	Description
JctFileManagerConfigurerChain()	Initialise this chain.

Method Summary

Modifier and Type	Method	Description
JctFileManagerConfigurerChain	addFirst(JctFileManagerConfigurer configurer)	Add a configurer to the start of the chain.
JctFileManagerConfigurerChain	addLast(JctFileManagerConfigurer configurer)	Add a configurer to the end of the chain.
JctFileManager	configure(JctFileManager fileManager)	Apply each configurer to the given file manager in order.
List<JctFileManagerConfigurer>	list()	Get an immutable copy of the list of configurers.

Methods inherited from class java.lang.Object

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

Constructor Details

JctFileManagerConfigurerChain

public JctFileManagerConfigurerChain()

Initialise this chain.

Method Details

addFirst

public JctFileManagerConfigurerChain addFirst(JctFileManagerConfigurer configurer)

Add a configurer to the start of the chain.

Parameters:

configurer - the configurer to add.

Returns:

this chain for further calls.

addLast

public JctFileManagerConfigurerChain addLast(JctFileManagerConfigurer configurer)

Add a configurer to the end of the chain.

Parameters:

configurer - the configurer to add.

Returns:

this chain for further calls.

list

public List<JctFileManagerConfigurer> list()

Get an immutable copy of the list of configurers.

Returns:

the list of configurers.

configure

public JctFileManager configure(JctFileManager fileManager)

Apply each configurer to the given file manager in order.

Parameters:

fileManager - the file manager to configure.

Returns:

the configured file manager to use. This may or may not be the same object as the input parameter, depending on how the configurers manipulate the input object.