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<!DOCTYPE api-answers PUBLIC "-//NetBeans//DTD Arch Answers//EN" "../../nbbuild/antsrc/org/netbeans/nbbuild/Arch.dtd" [
<!ENTITY api-questions SYSTEM "../../nbbuild/antsrc/org/netbeans/nbbuild/Arch-api-questions.xml" >
]>
<api-answers
question-version ="1.24"
author="jglick@netbeans.org"
>
&api-questions;
<!--
< question id = " arch - overall " when = " init " >
Describe the overall architecture .
< hint >
What will be API for
< a href = " http : / / openide . netbeans . org / tutorial / api - design . html # design . apiandspi " >
clients and what support API < / a > ?
What parts will be pluggable ?
How will plug - ins be registered ? Please use < code > & lt ; api type = " export " / & gt ; < / code >
to describe your general APIs .
If possible please provide
simple diagrams .
< / hint >
< / question >
-->
<answer id ="arch-overall" >
<api group="java" name="JavaPlatformAPI" type ="export" category="official" >
The Java Platform API permits access to installed Java platforms (for example,
the J2SE JDK, or various mobile-device emulators for J2ME). Particular platform
types are registered by modules and can store customized information about the
platform to disk. <br/>
<b>Note</b> that this module concentrates the part of th API which is independent of
the client desktop (and Swing UI library) environment. Its desktop-dependent counterpart
is in the <a href ="@org-netbeans-modules-java-platform-ui@/index.html" >
org.netbeans.modules.java.platform.ui</a> module.
</api>
</answer>
<!--
< question id = " arch - quality " when = " init " >
How the < a href = " http : / / www . netbeans . org / community / guidelines / q - evangelism . html " > quality < / a >
of your code will be tested and
how future regressions are going to be prevented ?
< hint >
What kind of testing
you want to use ? What / how much area of functionality
should be covered by the tests ?
< / hint >
< / question >
-->
<answer id ="arch-quality" >
<p>
Ought to be covered by unit tests, with the exception of GUI components which
may need functional tests.
</p>
</answer>
<!--
< question id = " arch - time " when = " init " >
What are the time estimates of the work ?
< hint >
Please express your estimates of how long the design , implementation ,
stabilization are likely to last . How many people will be needed to
implement this and what is the expected milestone the work should be
ready .
< / hint >
< / question >
-->
<answer id ="arch-time" >
<p>
It is working and no major efforts are thought to remain.
</p>
</answer>
<!--
< question id = " arch - usecases " when = " init " >
Describe the main < a href = " http : / / openide . netbeans . org / tutorial / api - design . html # usecase " >
use cases < / a > of the new API . Who will use it at
what circumstances and what will be the typical code to write
to use the module .
< / question >
-->
<answer id ="arch-usecases" >
<p>
The API can be used by any code wishing to know the list of installed
platforms and information about each one; typically this would be used by
project type providers to implement a customizer dialog. The SPI is intended
to be implemented by a few modules supply support for locating and
introspecting installed platforms, for example a JDK setup wizard.
</p>
</answer>
<!--
< question id = " arch - what " when = " init " >
What is this project good for ?
< hint >
Please provide here a few lines describing the project ,
what problem it should solve , provide links to documentation ,
specifications , etc .
< / hint >
< / question >
-->
<answer id ="arch-what" >
<p>
Many Java-based project types need to be able to configure the version and
location of Java to be used when building and running the project. This
API/SPI permits these platforms to be registered and queried, and any
customizations made in an appropriate GUI and persisted to disk.
</p>
</answer>
<!--
< question id = " compat - i18n " when = " impl " >
Is your module correctly internationalized ?
< hint >
Correct internationalization means that it obeys instructions
at < a href = " http : / / www . netbeans . org / download / dev / javadoc / org - openide - modules / org / openide / modules / doc - files / i18n - branding . html " >
NetBeans I18N pages < / a > .
< / hint >
< / question >
-->
<answer id ="compat-i18n" >
<p>
Yes. The only UI of platform module is a platform template wizard and customizer and it is localized.
Platforms can provide display names. The main portion of the wizard/customizer UI is supplied by the platform type .
</p>
</answer>
<!--
< question id = " compat - standards " when = " init " >
Does the module implement or define any standards ? Is the
implementation exact or does it deviate somehow ?
< / question >
-->
<answer id ="compat-standards" >
<p>
No.
</p>
</answer>
<!--
< question id = " compat - version " when = " impl " >
Can your module coexist with earlier and future
versions of itself ? Can you correctly read all old settings ? Will future
versions be able to read your current settings ? Can you read
or politely ignore settings stored by a future version ?
< hint >
Very helpful for reading settings is to store version number
there , so future versions can decide whether how to read / convert
the settings and older versions can ignore the new ones .
< / hint >
< / question >
-->
<answer id ="compat-version" >
<p>
Yes.
The platform module does not provide any persistence mechanism.
</p>
</answer>
<!--
< question id = " dep - jre " when = " final " >
Which version of JRE do you need ( 1 . 2 , 1 . 3 , 1 . 4 , etc . ) ?
< hint >
It is expected that if your module runs on 1 . x that it will run
on 1 . x + 1 if no , state that please . Also describe here cases where
you run different code on different versions of JRE and why .
< / hint >
< / question >
-->
<answer id ="dep-jre" >
<p>
1 .4 +.
</p>
</answer>
<!--
< question id = " dep - jrejdk " when = " final " >
Do you require the JDK or is the JRE enough ?
< / question >
-->
<answer id ="dep-jrejdk" >
<p>
JRE, though the <q>default platform</q> (the one running the IDE itself) would
be the JDK.
</p>
</answer>
<!--
< question id = " dep - nb " when = " init " >
What other NetBeans projects and modules does this one depend on ?
< hint >
If you want , describe such projects as imported API using
the < code > & lt ; api name = " identification " type = " import or export " category = " stable " url = " where is the description " / & gt ; < / code >
< / hint >
< / question >
-->
<answer id ="dep-nb" >
<ol>
<li>
<api group="java" name="Filesystems" type ="import" category="official" >
<p>
Various purposes.
</p>
</api>
</li>
<li>
<api group="java" name="Actions" type ="import" category="official" >
<p>
Registration of platform manager action.
</p>
</api>
</li>
<li>
<api group="java" name="Datasystems" type ="import" category="official" >
<p>
<code>FolderInstance</code> is used only internally.
</p>
</api>
</li>
<li>
<api group="java" name="JavaSupportAPIs" type ="import" category="official" >
<p>
To return <q>bootstrap libraries</q> and <q>standard libraries</q> as
a <code>ClassPath</code>.
</p>
</api>
</li>
<li>
<api group="java" name="Wizards" type ="import" category="official" >
<p>
Dialogs used to customize platforms.
</p>
</api>
</li>
<li>
<api group="java" name="Modules" type ="import" category="official" >
<p>
<code>SpecificationVersion</code> used in the API.
</p>
</api>
</li>
<li>
<api group="java" name="Nodes" type ="import" category="official" >
<p>
For miscellaneous GUI.
</p>
</api>
</li>
</ol>
</answer>
<!--
< question id = " dep - non - nb " when = " init " >
What other projects outside NetBeans does this one depend on ?
< hint >
Some non - NetBeans projects are packaged as NetBeans modules
( see < a href = " http : / / libs . netbeans . org / " > libraries < / a > ) and
it is preferred to use this approach when more modules may
depend on such third - party library .
< / hint >
< / question >
-->
<answer id ="dep-non-nb" >
<p>
None.
</p>
</answer>
<!--
< question id = " dep - platform " when = " init " >
On which platforms does your module run ? Does it run in the same
way on each ?
< hint >
If your module is using JNI or deals with special differences of
OSes like filesystems , etc . please describe here what they are .
< / hint >
< / question >
-->
<answer id ="dep-platform" >
<p>
Any.
</p>
</answer>
<answer id ="deploy-dependencies" >
Nothing.
</answer>
<!--
< question id = " deploy - jar " when = " impl " >
Do you deploy just module JAR file ( s ) or other files as well ?
< hint >
If your module consists of just one module JAR file , just confirm that .
If it uses more than one JAR , describe where they are located , how
they refer to each other .
If it consist of module JAR ( s ) and other files , please describe
what is their purpose , why other files are necessary . Please
make sure that installation / uninstallation leaves the system
in state as it was before installation .
< / hint >
< / question >
-->
<answer id ="deploy-jar" >
<p>
JAR only.
</p>
</answer>
<!--
< question id = " deploy - nbm " when = " impl " >
Can you deploy an NBM via the Update Center ?
< hint >
If not why ?
< / hint >
< / question >
-->
<answer id ="deploy-nbm" >
<p>
Yes.
</p>
</answer>
<!--
< question id = " deploy - packages " when = " init " >
Are packages of your module made inaccessible by not declaring them
public ?
< hint >
NetBeans module system allows restriction of access rights to
public classes of your module from other modules . This prevents
unwanted dependencies of others on your code and should be used
whenever possible ( < a href = " http : / / www . netbeans . org / download / javadoc / OpenAPIs / org / openide / doc - files / upgrade . html # 3 . 4 - public - packages " >
public packages
< / a > ) . If you do not restrict access to your classes you are
making it too easy for other people to misuse your implementation
details , that is why you should have good reason for not
restricting package access .
< / hint >
< / question >
-->
<answer id ="deploy-packages" >
<p>
Yes, only API and SPI packages are exported.
</p>
</answer>
<!--
< question id = " deploy - shared " when = " final " >
Do you need to be installed in the shared location only , or in the user directory only ,
or can your module be installed anywhere ?
< hint >
Installation location shall not matter , if it does explain why .
Consider also whether < code > InstalledFileLocator < / code > can help .
< / hint >
< / question >
-->
<answer id ="deploy-shared" >
<p>
Anywhere.
</p>
</answer>
<!--
< question id = " exec - classloader " when = " impl " >
Does your code create its own class loader ( s ) ?
< hint >
A bit unusual . Please explain why and what for .
< / hint >
< / question >
-->
<answer id ="exec-classloader" >
<p>
No.
</p>
</answer>
<!--
< question id = " exec - component " when = " impl " >
Is execution of your code influenced by any ( string ) property
of any of your components ?
< hint >
Often < code > JComponent . getClientProperty < / code > , < code > Action . getValue < / code >
or < code > PropertyDescriptor . getValue < / code > , etc . are used to influence
a behavior of some code . This of course forms an interface that should
be documented . Also if one depends on some interface that an object
implements ( < code > component instanceof Runnable < / code > ) that forms an
API as well .
< / hint >
< / question >
-->
<answer id ="exec-component" >
<p>
No.
</p>
</answer>
<!--
< question id = " exec - introspection " when = " impl " >
Does your module use any kind of runtime type information ( < code > instanceof < / code > ,
work with < code > java . lang . Class < / code > , etc . ) ?
< hint >
Check for cases when you have an object of type A and you also
expect it to ( possibly ) be of type B and do some special action . That
should be documented . The same applies on operations in meta - level
( Class . isInstance ( . . . ) , Class . isAssignableFrom ( . . . ) , etc . ) .
< / hint >
< / question >
-->
<answer id ="exec-introspection" >
<p>
No.
</p>
</answer>
<!--
< question id = " exec - privateaccess " when = " final " >
Are you aware of any other parts of the system calling some of
your methods by reflection ?
< hint >
If so , describe the " contract " as an API . Likely private or friend one , but
still API and consider rewrite of it .
< / hint >
< / question >
-->
<answer id ="exec-privateaccess" >
<p>
No.
</p>
</answer>
<!--
< question id = " exec - process " when = " impl " >
Do you execute an external process from your module ? How do you ensure
that the result is the same on different platforms ? Do you parse output ?
Do you depend on result code ?
< hint >
If you feed an input , parse the output please declare that as an API .
< / hint >
< / question >
-->
<answer id ="exec-process" >
<p>
No.
</p>
</answer>
<!--
< question id = " exec - property " when = " impl " >
Is execution of your code influenced by any environment or
Java system ( < code > System . getProperty < / code > ) property ?
< hint >
If there is a property that can change the behavior of your
code , somebody will likely use it . You should describe what it does
and the < a href = " http : / / openide . netbeans . org / tutorial / api - design . html # life " > stability category < / a >
of this API . You may use
< pre >
& lt ; api type = " export " group = " property " name = " id " category = " private " url = " http : / / . . . " & gt ;
description of the property , where it is used , what it influence , etc .
& lt ; / api & gt ;
< / pre >
< / hint >
< / question >
-->
<answer id ="exec-property" >
<p>
No.
</p>
</answer>
<!--
< question id = " exec - reflection " when = " impl " >
Does your code use Java Reflection to execute other code ?
< hint >
This usually indicates a missing or insufficient API in the other
part of the system . If the other side is not aware of your dependency
this contract can be easily broken .
< / hint >
< / question >
-->
<answer id ="exec-reflection" >
<p>
No.
</p>
</answer>
<!--
< question id = " exec - threading " when = " impl " >
What threading models , if any , does your module adhere to ?
< hint >
If your module calls foreign APIs which have a specific threading model ,
indicate how you comply with the requirements for multithreaded access
( synchronization , mutexes , etc . ) applicable to those APIs .
If your module defines any APIs , or has complex internal structures
that might be used from multiple threads , declare how you protect
data against concurrent access , race conditions , deadlocks , etc . ,
and whether such rules are enforced by runtime warnings , errors , assertions , etc .
Examples : a class might be non - thread - safe ( like Java Collections ) ; might
be fully thread - safe ( internal locking ) ; might require access through a mutex
( and may or may not automatically acquire that mutex on behalf of a client method ) ;
might be able to run only in the event queue ; etc .
Also describe when any events are fired : synchronously , asynchronously , etc .
Ideas : < a href = " http : / / core . netbeans . org / proposals / threading / index . html # recommendations " > Threading Recommendations < / a > ( in progress )
< / hint >
< / question >
-->
<answer id ="exec-threading" >
<p>
TBD.
</p>
</answer>
<!--
< question id = " format - clipboard " when = " impl " >
Which data flavors ( if any ) does your code read from or insert to
the clipboard ( by access to clipboard on means calling methods on < code > java . awt . datatransfer . Transferable < / code > ?
< hint >
Often Node ' s deal with clipboard by usage of < code > Node . clipboardCopy , Node . clipboardCut and Node . pasteTypes < / code > .
Check your code for overriding these methods .
< / hint >
< / question >
-->
<answer id ="format-clipboard" >
<p>
None.
</p>
</answer>
<!--
< question id = " format - dnd " when = " impl " >
Which protocols ( if any ) does your code understand during Drag & amp ; Drop ?
< hint >
Often Node ' s deal with clipboard by usage of < code > Node . drag , Node . getDropType < / code > .
Check your code for overriding these methods . Btw . if they are not overridden , they
by default delegate to < code > Node . clipboardCopy , Node . clipboardCut and Node . pasteTypes < / code > .
< / hint >
< / question >
-->
<answer id ="format-dnd" >
<p>
None.
</p>
</answer>
<!--
< question id = " format - types " when = " impl " >
Which protocols and file formats ( if any ) does your module read or write on disk ,
or transmit or receive over the network ?
< / question >
-->
<answer id ="format-types" >
<p>
None.
</p>
</answer>
<!--
< question id = " lookup - lookup " when = " init " >
Does your module use < code > org . openide . util . Lookup < / code >
or any similar technology to find any components to communicate with ? Which ones ?
< hint >
Please describe the interfaces you are searching for , where
are defined , whether you are searching for just one or more of them ,
if the order is important , etc . Also classify the stability of such
API contract .
< / hint >
< / question >
-->
<answer id ="lookup-lookup" >
<p>
Instances of the platforms are put into the default lookup by the platform implementors. Rather than query the lookup
clients should use <code>PlatformManager.getInstalledPlatforms()</code>.
</p>
</answer>
<!--
< question id = " lookup - register " when = " final " >
Do you register anything into lookup for other code to find ?
< hint >
Do you register using layer file or using < code > META - INF / services < / code > ?
Who is supposed to find your component ?
< / hint >
< / question >
-->
<answer id ="lookup-register" >
<ul>
<li>
<p>
Default (J2SE) platform.
</p>
</li>
<li>
<p>
Query implementations relating to Java platforms.
</p>
</li>
</ul>
</answer>
<!--
< question id = " lookup - remove " when = " final " >
Do you remove entries of other modules from lookup ?
< hint >
Why ? Of course , that is possible , but it can be dangerous . Is the module
your are masking resource from aware of what you are doing ?
< / hint >
< / question >
-->
<answer id ="lookup-remove" >
<p>
No.
</p>
</answer>
<!--
< question id = " perf - exit " when = " final " >
Does your module run any code on exit ?
< / question >
-->
<answer id ="perf-exit" >
<p>
No.
</p>
</answer>
<!--
< question id = " perf - huge_dialogs " when = " final " >
Does your module contain any dialogs or wizards with a large number of
GUI controls such as combo boxes , lists , trees , or text areas ?
< / question >
-->
<answer id ="perf-huge_dialogs" >
<p>
Nothing large.
</p>
</answer>
<!--
< question id = " perf - limit " when = " init " >
Are there any hard - coded or practical limits in the number or size of
elements your code can handle ?
< / question >
-->
<answer id ="perf-limit" >
<p>
No.
</p>
</answer>
<!--
< question id = " perf - mem " when = " final " >
How much memory does your component consume ? Estimate
with a relation to the number of windows , etc .
< / question >
-->
<answer id ="perf-mem" >
<p>
Probably minimal.
</p>
</answer>
<!--
< question id = " perf - menus " when = " final " >
Does your module use dynamically updated context menus , or
context - sensitive actions with complicated enablement logic ?
< / question >
-->
<answer id ="perf-menus" >
<p>
No.
</p>
</answer>
<!--
< question id = " perf - progress " when = " final " >
Does your module execute any long - running tasks ?
< hint > Long running tasks should never block
AWT thread as it badly hurts the UI
< a href = " http : / / performance . netbeans . org / responsiveness / issues . html " >
responsiveness < / a > .
Tasks like connecting over
network , computing huge amount of data , compilation
be done asynchronously ( for example
using < code > RequestProcessor < / code > ) , definitively it should
not block AWT thread .
< / hint >
< / question >
-->
<answer id ="perf-progress" >
<p>
No.
</p>
</answer>
<!--
< question id = " perf - scale " when = " init " >
Which external criteria influence the performance of your
program ( size of file in editor , number of files in menu ,
in source directory , etc . ) and how well your code scales ?
< hint >
Please include some estimates , there are other more detailed
questions to answer in later phases of implementation .
< / hint >
< / question >
-->
<answer id ="perf-scale" >
<p>
Number of installed platforms.
</p>
</answer>
<!--
< question id = " perf - spi " when = " init " >
How the performance of the plugged in code will be enforced ?
< hint >
If you allow foreign code to be plugged into your own module , how
do you enforce , that it will behave correctly and fast and will not
negatively influence the performance of your own module ?
< / hint >
< / question >
-->
<answer id ="perf-spi" >
<p>
No special provisions.
</p>
</answer>
<!--
< question id = " perf - startup " when = " final " >
Does your module run any code on startup ?
< / question >
-->
<answer id ="perf-startup" >
<p>
No.
</p>
</answer>
<!--
< question id = " perf - wakeup " when = " final " >
Does any piece of your code wake up periodically and do something
even when the system is otherwise idle ( no user interaction ) ?
< / question >
-->
<answer id ="perf-wakeup" >
<p>
No.
</p>
</answer>
<!--
< question id = " resources - file " when = " final " >
Does your module use < code > java . io . File < / code > directly ?
< hint >
NetBeans provide a logical wrapper over plain files called
< code > org . openide . filesystems . FileObject < / code > that
provides uniform access to such resources and is the preferred
way that should be used . But of course there can be situations when
this is not suitable .
< / hint >
< / question >
-->
<answer id ="resources-file" >
<p>
For miscellaneous purposes.
</p>
</answer>
<!--
< question id = " resources - layer " when = " final " >
Does your module provide own layer ? Does it create any files or
folders in it ? What it is trying to communicate by that and with which
components ?
< hint >
NetBeans allows automatic and declarative installation of resources
by module layers . Module register files into appropriate places
and other components use that information to perform their task
( build menu , toolbar , window layout , list of templates , set of
options , etc . ) .
< / hint >
< / question >
-->
<answer id ="resources-layer" >
<p>
The folder <code>org-netbeans-api-java/platform/installers</code> on the system filesystem is used
to store the <code>PlatformInstall</code> instance files.
</p>
<p>
The folder <code>Services/Platforms/org-netbeans-api-java-Platform</code> on the system filesystem is used
to store the Java platform definitions.
</p>
</answer>
<!--
< question id = " resources - mask " when = " final " >
Does your module mask / hide / override any resources provided by other modules in
their layers ?
< hint >
If you mask a file provided by another module , you probably depend
on that and do not want the other module to ( for example ) change
the file ' s name . That module shall thus make that file available as an API
of some stability category .
< / hint >
< / question >
-->
<answer id ="resources-mask" >
<p>
No.
</p>
</answer>
<!--
< question id = " resources - read " when = " final " >
Does your module read any resources from layers ? For what purpose ?
< hint >
As this is some kind of intermodule dependency , it is a kind of API .
Please describe it and classify according to
< a href = " http : / / openide . netbeans . org / tutorial / api - design . html # categories " >
common stability categories < / a > .
< / hint >
< / question >
-->
<answer id ="resources-read" >
<p>
<code>JavaPlatform</code> and <code>PlatformInstall</code> instances are read from the system filesystem.
</p>
</answer>
<!--
< question id = " security - grant " when = " final " >
Does your code grant additional rights to some other code ?
< hint > Avoid using a class loader that adds extra
permissions to loaded code unless really necessary .
Also note that your API implementation
can also expose unneeded permissions to enemy code by
calling AccessController . doPrivileged ( ) . < / hint >
< / question >
-->
<answer id ="security-grant" >
<p>
No.
</p>
</answer>
<!--
< question id = " security - policy " when = " final " >
Does your functionality require modifications to the standard policy file ?
< hint > Your code might pass control to third - party code not
coming from trusted domains . This could be code downloaded over the
network or code coming from libraries that are not bundled
with NetBeans . Which permissions need to be granted to which domains ? < / hint >
< / question >
-->
<answer id ="security-policy" >
<p>
No.
</p>
</answer>
</api-answers>
Messung V0.5 in Prozent C=96 H=91 G=93
¤ Dauer der Verarbeitung: 0.20 Sekunden
(vorverarbeitet am 2026-06-10)
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