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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"
  module="Refactoring API"
  author="jbecicka@netbeans.org"
>

  &api-questions;


<!--
        <question id="arch-overall" when="init">
            Describe the overall architecture.
            <hint>
            What will be API for 
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            to describe your general APIs.
            If possible please provide 
            simple diagrams. 
            </hint>
        </question>
-->
 <answer id="arch-overall">
The Refactoring API module provides UI and API framework for easy and uniform implementation of refactoring features.

The Refactoring module provides:
<ul>
 <li>API, which allows clients to invoke refactorings programmatically.</li>
 <li>Plug-in SPI that allows other clients to participate in existing refactorings. E.g. Java Refactoring module implements refactoring features for java files,
 while J2EE module adds refactoring capability for deployment descriptors</li>
 <li>API for definition of new Refactorings and pluging them into Refactoring framework</li>
</ul>
 </answer>



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            What kind of testing do
            you want to use? How much functionality, in which areas,
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 <answer id="arch-quality">
  <p>
Refactoring module functionality will be covered by Refactoring Unit tests. 
  </p>
 </answer>



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 <answer id="arch-time">
  <p>
   Target Milestone for this task is NetBeans 6.0Dev, M7
  </p>
 </answer>



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                at the root of your javadoc
            </hint>
        
            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 under
            what circumstances? What kind of code would typically need to be written
            to use the module?
        </question>
-->
 <answer id="arch-usecases">
 Refactoring module provides API for refactorings. The idea is that at least the most elementary set of refactorings should be
 available via an API, so that the refactorings could be invoked programmatically. This is particulary useful when creating more
 complex refactorings. These can then be composed from the primitive refactorings accessible via an API using delegation. As an example we can use
 a simple rename refactoring. When renaming a class in a J2SE environment, simple rename refactoring (which renames all occurrences of
 the class) is sufficient. However in a J2EE environment, renaming a class may require renaming of other classes to preserve the functionality
 of the application (e.g. synchrinized renaming a home and remote interface for an EJB). This could be achieved by creating a more complex rename
 refactoring composed of two simple rename refactorings (one for each class to be renamed).
 <p/>
 When analyzing flow of various refactorings, we have found out that the steps in the flow are very common for all
 refactorings. The flow is as follows:
 <ul>
    <li>User selects an object (or set of objects) and chooses to invoke a particular refactoring on it.</li>
    <li>Refactoring pre-conditions are checked - whether a given refactoring can be invoked on a given object (or set of objects) or not. User needs to be
    presented with errors (if any). The errors can be fatal or non-fatal. If an error is fatal, it means the refactoring cannot be performed, if it is not
    fatal, user should be notified of the problem but still be able to proceed with the refactoring.</li>
    <li>User sets parameters of the refactoring - each refactoring has some input parameters (e.g. new name for an element in case of Rename refactoring).
    These parameters need to be set by the client.</li>
    <li>Entered values of refactoring parameters are checked - errors (if any) are presented to the user.</li>
    <li>Refactoring collects all changes that need to be performed and presents them to the user.</li>
    <li>User can choose to not perform a particular set of proposed changes.</li>
    <li>Refactoring is performed - all the changes confirmed by user are made to the source code.</li>
 </ul>
 To make the implementation of various refactorings consistent, the refactoring module provides an API and UI framework that allows these refactorings to be plugged in. This
 framework enforces the above flow. Using this framework (set of SPI and API) the refactoring implementor can focus purely on the things specific to that particular refactoring
 (specific pre-conditions checks, parameters checks, implementation of changes, etc.) and leave the
 functionality that is common for all refactorings (implementation of the flow) up to the framework.
 <p/>
 It is quite common that some modules need to be able to affect the behavior of a refactoring. There are 4 typical use-cases when this is desirable:
 <ol>
     <li>A module wants to implement refactoring features for their own elements. For instance Java Refactoring module wants to implement Refactoring for Java elements.</li>
     <li>A module wants to participate in existing refactoring. E.g. refactoring of java files requires refactoring of non-java files in J2EE area. When a code is refactored, these non-java files need to be refactored too.
We can mention JSP files or deployment descriptors as an example.</li>
     <li>A module introduces some hidden relationships between several elements. E.g. a single logical EJB consists of several physical classes. When one of these classes are refactored,
     the other classes need to be refactored as well.</li>
     <li>A module generates some derived code into the guarded blocks. In such case it is desirable that the provider of the guarded block refactors the guarded code, since
     the refactoring module itself has no knowledge of where the guarded code comes from.</li>
 </ol>
 The refactoring module provides hooks for other modules - an SPI that allows other modules to participate in refactorings. The modules can participate on all refactoring
 phases from "preCheck" (checking preconditions), through "checkParameters" (checking validity of refactoring parameters) to "prepare" (collecting changes).
 Use-cases number 1), 2) and 3) are covered by the same SPI (interfaces RefactoringPluginFactory and RefactoringPlugin). The forth use-case (guarded blocks) are covered by
 a separate set of interfaces, since for this use-case the module does not need to participate in all refactoring phases. The refactoring framework itself automatically detects
 that a given change points to a code in guarded blocks and requests all registered guarded block providers to handle that situation.
 <p/>
 The rest of this section provides simple orientational examples of API/SPI usage.
 <p/>
<b>Refactoring API</b> can be used for programmatical invocation of refactorings and for pluging ui for these refactorings in.
<p><i><b>Refactoring API Example:</b></i></p> 
<i>Intention:</i> Programatically rename java file<code>com/company/Test.java</code> to <code>com/company/RenamedTest.java</code> and update references.
<pre>

  	FileObject fo = ...com/company/Test.java...
        RefactoringSession renameSession = RefactoringSession.create("Rename Class");
        refactoring = new RenameRefactoring(fo);
        Problem pre = refactoring.preCheck();
        if (pre!=null &amp;&amp; pre.isFatal()) {
     	  //fatal problem in precheck
     	  return;
        }
        refactoring.setNewName("RenamedTest");
        Problem p = refactoring.prepare(renameSession);
        
        if (p!=null &amp;&amp; p.isFatal()) {
     	  //fatal problem in precheck
     	  return;
        }
        
        renameSession.doRefactoring(true /* saveAll */);
</pre>
        
<p>
<b>Refactoring SPI</b> permit other modules to plug into existing refactorings and allow them to participate.
Client of SPI must implement factory class <code>RefactoringPluginFactory</code> and register this class into Lookup.
</p>
<i><b>Refactoring SPI Example 1:</b></i>
<p>
    <i>Intention:</i> Create a plugin for RenameRefactoring, which will participate in existing refactoring (let say in java refactoring) 
    and renames references in XML files.
</p>
<pre>
//implementation of factory class
public class J2EERefactoringFactory implements RefactoringPluginFactory {
    
    public RefactoringPlugin createInstance(AbstractRefactoring refactoring) {
    
        if (refactoring instanceof RenameRefactoring) {
            //return our custom instance for RenameRefactoring
            if (wantToParticipate(refactoring.getRefactoredObject())
                return new J2EERenameRefactoringPlugin((RenameRefactoring) refactoring);
        }
        
        if (refactoring instanceof ... {
            ...
        }

        return null;
    }
    
}
</pre>

It is necessary to register <code>J2EERefactoringFactory</code> in the lookup:
<pre>
META-INF/services/org.netbeans.modules.refactoring.spi.RefactoringPluginFactory
</pre>
<p>
and implement RefactoringPlugin interface:
</p>

<pre>
//implementation of RefactoringPlugin
public class J2EERenameRefactoringPlugin implements RefactoringPlugin {
    
    private RenameRefactoring refactoring;
    
    public J2EERenameRefactoringPlugin(RenameRefactoring refactoring) { 
        this.refactoring = refactoring;
    }
 
    public Problem preCheck() {
        ...
    }
    
    public Problem checkParameters() {
        ...
    }
    
    public Problem fastCheckParameters() {
        ...
    }
    
    public void cancelRequest() {
        ...
    }
    
    public Problem prepare(RefactoringElementsBag refactoringElements) {
        RenameRefactoring renameRefactor = ((RenameRefactoring)refactoring);
        Object element = renameRefactor.getRefactoredObject();
        if (...) {
           ...
           //lets add our RefactoringElements for usages found in XML files 
           refactoringElements.add(refactoring, new XMLRenameRefactoringElement());
        }
        return null;
    }

    public class XMLRenameRefactoringElement implements RefactoringElementImplementation {

        public void performChange() {
            //do change
        }
    }
</pre>

<i><b>Refactoring SPI Example 2:</b></i>
<i>Intention:</i> Create a module, which will add Rename... to html files
First you must create your ActionsImplementationProvider:
<pre>
public class MyProvider extends ActionsImplementationProvider {
    
  public boolean canRename(Lookup lookup) {
    Node[] nodes = lookup.lookupAll(Node.class);
    if (..one node selected and the node belongs to html...)
      return true;
    else 
      return fals;
 }

  public void doRename(Lookup selectedNodes) {
    Node[] nodes = lookup.lookupAll(Node.class);
    final FileObject fo = getFileFromNode(nodes[0]);
    return new Runnable() {
      public void run() {
        UI.openRefactoringUI(new RenameRefactoringUI(fo);
      }
    }    
  }
}
</pre>
And of course your own RefactoringPlugin and RefactoringPluginFactory see 
<i><b>Refactoring SPI Example 1</b></i> and
<i><b>Refactoring SPI Example 2</b></i>
<br></br>
<i><b>Refactoring SPI Example 3</b></i>
Module wants to implement it's own refactoring preview tree:

Register your own TreeElementFactoryImplementation into META-INF/services
if you want to build your own RefactoringPreview tree.
 
For instance Java Refactoring understand Java - specific objects e.g. 
Projects, Groups, Methods etc.

<pre>
public TreeElement getTreeElement(Object o) {
.
.
if (o instanceof SourceGroup) {
  return new SourceGroupTreeElement((SourceGroup)o);
} else if (o instanceof SomethingFromJava) {
   return new SomethingFromJavaTreeElement((SomethingFromJava) o);
}
</pre>
TreeElement is then displayed in refactoring preview panel.

<br></br>
<br></br>
<br></br>Other usecases are docummented in javadoc.
<ul>
    <li>Module wants to add common Refactoring Action into popup. <br></br>
        See <a href="@TOP@/org/netbeans/modules/refactoring/api/ui/RefactoringActionsFactory.html">RefactoringActionsFactory</a>
    </li>
    <li>
       http://wiki.netbeans.org/wiki/view/RefactoringFAQ
    </li>
</ul>

 </answer>



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        </question>
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 <answer id="arch-what">
  <p>
Refactoring module allows developer to do high level code transformations aka refactorings.
  </p>
 </answer>

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        <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>
	Refactoring module exposes <api name="RefactoringAPI" category="devel" type="export" group="java"/> and <api name="RefactoringSPI" category="devel" type="export" group="java"/>
  </p>
 </answer>

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            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">
    <defaultanswer generate="none"/>
    <ul>
    <li><api name="FilesystemsAPI" type="import" url="@org-openide-filesystems@/org/openide/filesystems/doc-files/api.html" category="official" group="java" /></li>
    <li><api name="LookupAPI" type="import" url="@org-openide-util@/org/openide/util/doc-files/api.html#lookup" category="official" group="java" /></li>
    <li><api name="UtilitiesAPI" type="import" url="@org-openide-util@/org/openide/util/doc-files/api.html" category="official" group="java" /></li>
    <li><api name="NodesAPI" group="java" type="import" category="official" url="@org-openide-nodes@/overview-summary.html" /></li>
    <li><api name="WindowSystemAPI" group="java" type="import" category="official" url="@org-openide-windows@/overview-summary.html"/></li>
    <li><api group="java" name="ProjectAPI" type="import" category="devel"> </api> </li>
    <li><api group="java" name="TextAPI" type="import" category="official">  </api> </li>
    <li><api name="ProjectAPI" type="import" category="official" group="java">Project API</api></li>
    <li><api name="DialogsAPI" type="import" category="official" group="java">Dialogs API</api></li>
    <li><api name="ActionsAPI" type="import" category="official" group="java">Actions API</api></li>
    <li><api name="ProgressAPI" type="import" category="official" group="java">Progress API</api></li>
    <li><api name="UIUtilitiesAPI" type="import" category="official" group="java">UI Utilities API</api></li>
    <li><api name="DiffAPI" type="import" category="official" group="java">Diff API</api></li>
    <li><api name="JavaHelp" type="import" category="official" group="java">JavaHelp</api></li>
    <li><api name="GuardedSections" type="import" category="official" group="java">Guarded Sections</api></li>
    <li><api name="GeneralQueriesAPI" type="import" category="official" group="java">General Queries API</api></li>
    </ul>
    
       AbstractRefactoring and it's sublcasses understands following types in its Lookup
    <ul>
    <li>
       <api name="FilesystemsAPI" type="import" url="@org-openide-filesystems@/org/openide/filesystems/doc-files/api.html" category="official" group="java">FileObject</api>
    </li>
    <li>
       <api name="JavaSourceAPI" type="import" group="property" category="devel">TreePathHandle</api>
    </li>
    </ul>
 </answer>



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 <answer id="dep-non-nb">
  <p>
   None.
  </p>
 </answer>



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 <answer id="dep-platform">
  <p>
   There are no known dependencies on any platform.
  </p>
 </answer>

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            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 
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 <answer id="deploy-packages">
   The only public packages are 
   <ul>
     <li>org.netbeans.modules.refactoring.api</li>
     <li>org.netbeans.modules.refactoring.api.ui</li>
     <li>org.netbeans.modules.refactoring.spi</li>
     <li>org.netbeans.modules.refactoring.spi.ui</li>
   </ul>
 </answer>

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            API contract. For that use &lt;api group=&amp;lookup&amp; /&gt; tag.
            </hint>
        </question>
-->
 <answer id="lookup-lookup">
Yes. We search for:
<ul>
<li><api group="lookup" name="org.netbeans.api.javahelp.Help" type="import" category="official"/></li>
<li>all instances of <api group="lookup" name="org.netbeans.modules.refactoring.spi.RefactoringPluginFactory" type="export" category="devel" /></li>
<li>all instances of <api group="lookup" name="org.netbeans.modules.refactoring.spi.GuardedBlockHandlerFactory" type="export" category="devel" /></li>
<li>an instance of  <api group="lookup" name="org.netbeans.modules.refactoring.spi.ReadOnlyFilesHandler" type="export" category="devel" /></li>
<li>all instances of  <api group="lookup" name="org.netbeans.modules.refactoring.spi.ui.ActionsImplementationProvider" type="export" category="devel" /></li>
<li>all instances of  <api group="lookup" name="org.netbeans.modules.refactoring.spi.ui.TreeElementFactoryImplementation" type="export" category="devel" /></li>
</ul>
 </answer>

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        <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>
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 <answer id="perf-limit">
  <p>
   No.
  </p>
 </answer>



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 <answer id="perf-scale">
  <p>
  Not known.
  </p>
 </answer>



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            </hint>
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 <answer id="perf-spi">
  <p>
   SPI will be well documented.
  </p>
 </answer> 

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 <answer id="compat-i18n">
  <p>
   Yes
  </p>
 </answer>



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            versions be able to read your current settings? Can you read
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            <hint>
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            there, so future versions can decide whether how to read/convert
            the settings and older versions can ignore the new ones.
            </hint>
        </question>
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 <answer id="compat-version">
  <p>
   Refactoring module does not load or save any settings.
  </p>
 </answer>



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            <hint>
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            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>
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 <answer id="dep-jre">
  <p>
   Refactoring module doesn't have any special requirements on JDK version. It runs on JDK 1.5+
  </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 is enough.
  </p>
 </answer>



 <answer id="deploy-dependencies">
Nothing.
 </answer>



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            <hint>
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            make sure that installation/uninstallation leaves the system 
            in state as it was before installation.
            </hint>
        </question>
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 <answer id="deploy-jar">
  <p>
   We deploy only one file: module JAR.
  </p>
 </answer>



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            Can you deploy an NBM via the Update Center?
            <hint>
            If not why?
            </hint>
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 <answer id="deploy-nbm">
  <p>
   Yes
  </p>
 </answer>



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            <hint>
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            Consider also whether <code>InstalledFileLocator</code> can help.
            </hint>
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 <answer id="deploy-shared">
  <p>
   The module can be installed anywhere.
  </p>
 </answer>



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            <hint>
            A bit unusual. Please explain why and what for.
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 <answer id="exec-classloader">
  <p>
   No.
  </p>
 </answer>



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            Is execution of your code influenced by any (string) property
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            <hint>
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            or <code>PropertyDescriptor.getValue</code>, etc. are used to influence
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            implements (<code>component instanceof Runnable</code>) that forms an
            API as well.
            </hint>
        </question>
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 <answer id="exec-component">
  <p>
    <api name="ActionMapKeys" category="stable" group="property" type="import" >
    the usages window defines <q>jumpNext</q> and <q>jumpPrev</q> action
    handlers in its <code>ActionMap</code>.
    </api>
  </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>
   Yes. Introspection is important part of Refactoring API. 
   Refactoring API itself works in many cases just with "Objects" not knowing the type of object.
   API users are required to implement Refactorings only for objects, which are known to them.
  
  </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" shape="rect">stability category</a>
            of this API. You may use
            <pre xml:space="preserve">
                &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" shape="rect">Threading Recommendations</a> (in progress)
            </hint>
        </question>
-->
 <answer id="exec-threading">
  <p>
   Refactoring adhere threading model of java/source module.
  </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>
   We register our own ClipboardConvertor and we wrap each refactorable Node Transferables with Refactoring Transferables
   in order to handle move/cut/copy actions as refactoring actions.
  </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>
   We don't override Node.drag. We have our own ClipboardConvertor. See above.
  </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>
   N/A
  </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">
  <p>
   We register classes into META-INF/services:
   <code>
       org.openide.loaders.FolderRenameHandle to handle rename action on folders
       org.openide.util.actions.ExtendedDelete to handle delete on multiple nodes
       org.openide.util.datatransfer.ExClipboard$Convertor to register ClipboardConvertor
    </code>
  </p>
 </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>
   Yes. RefactoringPanel (Output window with tree of found usages can contain big number of found references).
  </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>
    I don't know.
  </p>
 </answer>



<!--
        <question id="perf-menus" when="final">
            Does your module use dynamically updated context menus, or
            context-sensitive actions with complicated and slow enablement logic?
            <hint>
                If you do a lot of tricks when adding actions to regular or context menus, you can significantly
                slow down display of the menu, even when the user is not using your action. Pay attention to
                actions you add to the main menu bar, and to context menus of foreign nodes or components. If
                the action is conditionally enabled, or changes its display dynamically, you need to check the
                impact on performance. In some cases it may be more appropriate to make a simple action that is
                always enabled but does more detailed checks in a dialog if it is actually run.
            </hint>
        </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" shape="rect">
            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>
   Yes. Collecting usages is long-running task. It is properly indicated by progress bar and does not lock AWT thread.
  </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>
   No
  </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">
     Refactoring module registers following items:
     <ul>
     <li>Menu items into <api name="Menu" group="layer" type="import" category="official"/> folder</li>
     <li>Shrtcuts into <api name="Shortcuts" group="layer" type="import" category="official"/> folder</li>
     <li>Actions into <api name="Actions" group="layer" type="import" category="official"/> folder</li>
     <li>DataObject's Actions (<api name="Loaders-Actions" group="layer" type="import" category="official">Loaders/folder/any/Actions</api></li>
     <li>New file Services/org-netbeans-modules-refactoring/options which is used for storing settings of checkbox 'Preview All' and 'Search In Comments'</li>
     </ul>
 </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>
    We hide regular RenameAction (in Loaders/folder/any/Actions)
   </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" shape="rect">
            common stability categories</a>.
            </hint>
        </question>
-->
 <answer id="resources-read">
  <p>
   We read contents of Menu/Refactoring in order to provide the same popup menu.
  </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>

 


<!--
        <question id="exec-ant-tasks" when="impl">
            Do you define or register any ant tasks that other can use?
            
            <hint>
            If you provide an ant task that users can use, you need to be very
            careful about its syntax and behaviour, as it most likely forms an
	          API for end users and as there is a lot of end users, their reaction
            when such API gets broken can be pretty strong.
            </hint>
        </question>
-->
 <answer id="exec-ant-tasks">
  <p>
   XXX no answer for exec-ant-tasks
  </p>
 </answer>




<!--
        <question id="arch-where" when="impl">
            Where one can find sources for your module?
            <hint>
                Please provide link to the CVS web client at
                http://www.netbeans.org/download/source_browse.html
                or just use tag defaultanswer generate='here'
            </hint>
        </question>
-->
 <answer id="arch-where">
  <defaultanswer generate='here' />
 </answer>



<!--
        <question id="compat-deprecation" when="init">
            How the introduction of your project influences functionality
            provided by previous version of the product?
            <hint>
            If you are planning to deprecate/remove/change any existing APIs,
            list them here accompanied with the reason explaining why you
            are doing so.
            </hint>
        </question>
-->
 <answer id="compat-deprecation">
  <p>
   XXX no answer for compat-deprecation
  </p>
 </answer>




<!--
        <question id="resources-preferences" when="final">
            Does your module uses preferences via Preferences API? Does your module use NbPreferences or
            or regular JDK Preferences ? Does it read, write or both ? 
            Does it share preferences with other modules ? If so, then why ?
            <hint>
                You may use
                    &lt;api type="export" group="preferences"
                    name="preference node name" category="private"&gt;
                    description of individual keys, where it is used, what it
                    influences, whether the module reads/write it, etc.
                    &lt;/api&gt;
                Due to XML ID restrictions, rather than /org/netbeans/modules/foo give the "name" as org.netbeans.modules.foo.
                Note that if you use NbPreferences this name will then be the same as the code name base of the module.
            </hint>
        </question>
-->
 <answer id="resources-preferences">
  <p>
   XXX no answer for resources-preferences
  </p>
 </answer>

</api-answers>