<!-- <questionid="arch-overall"when="init"> Describetheoverallarchitecture. <hint> WhatwillbeAPIfor <ahref="http://openide.netbeans.org/tutorial/api-design.html#design.apiandspi"> clientsandwhatsupportAPI</a>? Whatpartswillbepluggable? Howwillplug-insberegistered?Pleaseuse<code><apitype="export"/></code> todescribeyourgeneralAPIs. Ifpossiblepleaseprovide simplediagrams. </hint> </question>
-->
<answer id="arch-overall">
<p>
<api name="classfile"
group="java" type="export"
category="stable">
</api>
The ClassFile library is an API to read Java classfiles, as described by
<a href="https://docs.oracle.com/javase/specs/jvms/se8/html/index.html">
The Java Virtual Machine Specification</a>. Given a file or stream reference to a Java
classfile, the API provides read-only access to all of its class attributes, including type information, methods and fields, generics support (if any), etc.
<br/>
NOTE: this library is not really a NetBeans module, in that it doesn't have any NetBeans references.
It therefore has nothing pluggable, no NetBeans Lookups, and is not extensible.
</p>
</answer>
<!-- <questionid="arch-quality"when="init"> Howwillthe<ahref="http://www.netbeans.org/community/guidelines/q-evangelism.html">quality</a> ofyourcodebetestedand howarefutureregressionsgoingtobeprevented? <hint> Whatkindoftestingdo youwanttouse?Howmuchfunctionality,inwhichareas, shouldbecoveredbythetests? </hint> </question>
-->
<answer id="arch-quality">
<p>
The ClassFile API is heavily used by the clazz and javacore modules, so that any
new bugs are normally reflected in those modules' test suites. There currently (as
of the 4.0 freeze date) are no outstanding bugs.
</p>
</answer>
<!-- <questionid="arch-usecases"when="init"> <hint> Contentofthisanswerwillbedisplayedaspartofpageat http://www.netbeans.org/download/dev/javadoc/usecases.html Youcanusetags<usecasename="name>regularhtmldescription</usecase> andifyouwanttouseanURLyoucanprefixifwith@TOP@tobegin attherootofyourjavadoc </hint> Describethemain<ahref="http://openide.netbeans.org/tutorial/api-design.html#usecase"> usecases</a>ofthenewAPI.Whowilluseitunder whatcircumstances?Whatkindofcodewouldtypicallyneedtobewritten tousethemodule? </question>
-->
<answer id="arch-usecases">
<p>
The normal usecase is for a client wanting to inspect a classfile. A <code>ClassFile</code>
instance is created with either a <code>String</code> path, <code>File</code> or
<code>InputStream</code> instance. All attributes of the classfile are available as properties,
such as <code>getSourceFileName</code> or <code>getMethods</code>.
</p>
</answer>
<!-- <questionid="arch-what"when="init"> Whatisthisprojectgoodfor? <hint> Pleaseprovidehereafewlinesdescribingtheproject, whatproblemitshouldsolve,providelinkstodocumentation, specifications,etc. </hint> </question>
-->
<answer id="arch-what">
<p>
The ClassFile API is designed as a fast, low memory-cost way to access classfile
information. It is useful for tools and modules that directly read classfiles,
such as the clazz and javacore modules.
</p>
</answer>
<!-- <questionid="compat-i18n"when="impl"> Isyourmodulecorrectlyinternationalized? <hint> Correctinternationalizationmeansthatitobeysinstructions at<ahref="http://www.netbeans.org/download/dev/javadoc/org-openide-modules/org/openide/modules/doc-files/i18n-branding.html"> NetBeansI18Npages</a>. </hint> </question>
-->
<answer id="compat-i18n">
<p>
The Module names have been internationalized. The only hard-coded strings in the library are either
Java language keywords, JVM attribute names, toString fragments, and exception descriptions. All of
these are marked with "//NOI18N" comments.
</p>
</answer>
<!-- <questionid="compat-standards"when="init"> Doesthemoduleimplementordefineanystandards?Isthe implementationexactordoesitdeviatesomehow? </question>
-->
<answer id="compat-standards">
<p>
The module depends upon the <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/index.html">
The Java Virtual Machine Specification</a>. It does not implement or define any standards, however.
</p>
</answer>
<!-- <questionid="compat-version"when="impl"> Canyourmodulecoexistwithearlierandfuture versionsofitself?Canyoucorrectlyreadalloldsettings?Willfuture versionsbeabletoreadyourcurrentsettings?Canyouread orpolitelyignoresettingsstoredbyafutureversion? <hint> Veryhelpfulforreadingsettingsistostoreversionnumber there,sofutureversionscandecidewhetherhowtoread/convert thesettingsandolderversionscanignorethenewones. </hint> </question>
-->
<answer id="compat-version">
<p>
N/A; the classfile module has no settings or other persistent data.
</p>
</answer>
<!-- <questionid="dep-jre"when="final"> WhichversionofJREdoyouneed(1.2,1.3,1.4,etc.)? <hint> Itisexpectedthatifyourmodulerunson1.xthatitwillrun on1.x+1ifno,statethatplease.Alsodescribeherecaseswhere yourundifferentcodeondifferentversionsofJREandwhy. </hint> </question>
-->
<answer id="dep-jre">
<p>
The classfile module now depends on the 1.4 JRE, since it uses assert statements.
Although this library can read 1.5 classfiles, it does not use any API from that
JRE.
</p>
</answer>
<!-- <questionid="dep-jrejdk"when="final"> DoyourequiretheJDKoristheJREenough? </question>
-->
<answer id="dep-jrejdk">
<p>
The JDK is not required; the JRE is enough.
</p>
</answer>
<!-- <questionid="dep-nb"when="init"> WhatotherNetBeansprojectsandmodulesdoesthisonedependon? <hint> Ifyouwant,describesuchprojectsasimportedAPIsusing the<code><apiname="identification"type="importorexport"category="stable"url="whereisthedescription"/></code> </hint> </question>
-->
<answer id="dep-nb">
<p>
The classfile module has no dependencies on any NetBeans module or API.
</p>
</answer>
<!-- <questionid="dep-non-nb"when="init"> WhatotherprojectsoutsideNetBeansdoesthisonedependon? <hint> Somenon-NetBeansprojectsarepackagedasNetBeansmodules (see<ahref="http://libs.netbeans.org/">libraries</a>)and itispreferredtousethisapproachwhenmoremodulesmay dependonsuchthird-partylibrary. </hint> </question>
-->
<answer id="dep-non-nb">
<p>
The classfile module has no dependencies on any other project.
</p>
</answer>
<!-- <questionid="dep-platform"when="init"> Onwhichplatformsdoesyourmodulerun?Doesitruninthesame wayoneach? <hint> IfyourmoduleisusingJNIordealswithspecialdifferencesof OSeslikefilesystems,etc.pleasedescribeherewhattheyare. </hint> </question>
-->
<answer id="dep-platform">
<p>
The classfile module is platform-independent.
</p>
</answer>
<!-- <questionid="perf-limit"when="init"> Arethereanyhard-codedorpracticallimitsinthenumberorsizeof elementsyourcodecanhandle? </question>
-->
<answer id="perf-limit">
<p>
No, other than the limits defined for classfiles in
<a href="https://docs.oracle.com/javase/specs/jvms/se8/html/index.html">
The Java Virtual Machine Specification</a>.
</p>
</answer>
<!-- <questionid="perf-mem"when="final"> Howmuchmemorydoesyourcomponentconsume?Estimate witharelationtothenumberofwindows,etc. </question>
-->
<answer id="perf-mem">
<p>
It depends on the size and complexity of the classfile being represented. ClassFile
representations can be roughly 7-10 times the size of the associated classfile, but
much smaller (2-4x) if the <code>includeCode</code> constructor parameter is false.
</p>
</answer>
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