first_transformation.html

<!DOCTYPE html>
<html lang="en">
<html>
  <head>

 <meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="keywords" content="getting-started,  start, begin, hello world, processor, spoon, factory, setter">
<title>Transformation processors  | Spoon</title>
<link rel="stylesheet" type="text/css" href="css/syntax.css">
<link rel="stylesheet" type="text/css" href="css/font-awesome.min.css">
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="css/modern-business.css">
<link rel="stylesheet" type="text/css" href="css/lavish-bootstrap.css">
<link rel="canonical" href="/first_transformation.html">
<link rel="stylesheet" type="text/css" href="css/customstyles.css">
<link rel="stylesheet" type="text/css" href="css/theme-mauve.css">
<link rel="canonical" href="/first_transformation.html">
<link rel="alternate" type="application/rss+xml" title="" href="feed.xml" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>
<script src="js/jquery.navgoco.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
<script src="js/toc.js"></script>
<script src="js/customscripts.js"></script>
<link rel="shortcut icon" href="favicon.ico" type="image/x-icon">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->







 

  <script>
    $(function () {
        $('[data-toggle="tooltip"]').tooltip()
    })
  </script>

  </head>

  <body>

   <!-- Navigation -->
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
    <div class="container topnavlinks">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
                <span class="sr-only">Toggle navigation</span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
            <a class="fa fa-home fa-lg navbar-brand" href="index.html">&nbsp;<span class="projectTitle"> Spoon</span></a>
        </div>
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
            <ul class="nav navbar-nav navbar-right">
                <!-- entries without drop-downs appear here -->
                <!-- conditional logic to control which topnav appears for the audience defined in the configuration file.-->
                




                
                
                
                
                <li><a href="papers.html">Papers</a></li>
                
                
                
                
                
                <li><a href="ecosystem.html">Ecosystem</a></li>
                
                
                
                
                
                <li><a href="about.html">About</a></li>
                
                
                
                
                
                <li><a href="https://ci.inria.fr/sos/" target="_blank">Jenkins</a></li>
                
                
                
                
                
                <li><a href="https://github.com/INRIA/spoon" target="_blank">Github</a></li>
                
                
                
                


                <!-- entries with drop-downs appear here -->
                <!-- conditional logic to control which topnav appears for the audience defined in the configuration file.-->

                <li class="dropdown">
                    
        </div>
        <!-- /.container -->
</nav>


    <!-- Page Content -->
    <div class="container">
      <div class="col-lg-12">&nbsp;</div>

      <!-- Content Row -->
<div class="row">
    <!-- Sidebar Column -->
    <div class="col-md-3">

        <script>

            $(document).ready(function() {
                        // Initialize navgoco with default options
                        $("#mysidebar").navgoco({
                            caretHtml: '',
                            accordion: true,
                            openClass: 'active', // open
                            save: false, // leave false or nav highlighting doesn't work right
                            cookie: {
                                name: 'navgoco',
                                expires: false,
                                path: '/'
                        },
                        slide: {
                            duration: 400,
                            easing: 'swing'
                                }
                                });

            $("#collapseAll").click(function(e) {
                e.preventDefault();
                $("#mysidebar").navgoco('toggle', false);
            });

            $("#expandAll").click(function(e) {
                e.preventDefault();
                $("#mysidebar").navgoco('toggle', true);
            });

            });

        </script>


        




        <ul id="mysidebar" class="nav">

            <div class="siteTagline">Spoon</div>

            
            
            
            <li><a href="#">Getting started</a>
                <ul>
                    
                    
                    
                    <li><a href="first_analysis_processor.html">Code Analysis</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="architecture_test.html">Architecture Checking</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="reflection.html">Runtime Reflection</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="custom-pretty-printing.html">Custom Java Pretty-Printing</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="processor.html">Processor for elements</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="/mvnsites/spoon-core/apidocs" target="_blank">Javadoc</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="spoon_javadoc.html">Javadoc Analysis</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="faq.html">FAQ</a></li>
                    

                    
            </li>
            
            
            </ul>
        </li>
        
        
            
            <li><a href="#">Querying source code elements</a>
                <ul>
                    
                    
                    
                    <li><a href="filter.html">AST Traversing</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="path.html">AST Paths and Roles</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="matcher.html">Matcher</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="pattern.html">Pattern</a></li>
                    

                    
            </li>
            
            
            </ul>
        </li>
        
        
            
            <li><a href="#">Code Transformation</a>
                <ul>
                    
                    
                    
                    <li class="active"><a href="first_transformation.html">Code Transformation</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="examples.html">Transformation Examples</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="processor_annotations.html">Transformation with annotations</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="template_definition.html">Transformation with Templates</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="spoon_smpl.html">Semantic patching</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="pattern.html#generator">Code Generation</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="testing_quickstart.html">Testing transformations</a></li>
                    

                    
            </li>
            
            
            </ul>
        </li>
        
        
            
            <li><a href="#">Usage</a>
                <ul>
                    
                    
                    
                    <li><a href="launcher.html">From Java</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="command_line.html">Command Line</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="maven.html">From Maven Plugin</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="gradle.html">From Gradle Plugin</a></li>
                    

                    
            </li>
            
            
            </ul>
        </li>
        
        
            
            <li><a href="#">Spoon Meta model</a>
                <ul>
                    
                    
                    
                    <li><a href="structural_elements.html">Structural elements</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="code_elements.html">Code elements</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="references.html">References</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="factories.html">Create elements with factories</a></li>
                    

                    
            </li>
            
            
                    
                    
                    <li><a href="comments.html">Comments and Positions</a></li>
                    

                    
            </li>
            
            
            </ul>
        </li>
        
        
        
        </ul>

        
    </div>
       <!-- this highlights the active parent class in the navgoco sidebar. this is critical so that the parent expands when you're viewing a page. This must appear below the sidebar code above.-->
    <script>$("li.active").parents('li').toggleClass("active");</script>


      <!-- Content Column -->
      <div class="col-md-9">

          <div class="post-header">
   <h1 class="post-title-main">Transformation processors</h1>
</div>

<div class="post-content">

   

  <p>We’ll make a first transformation that adds a field to a class
and initializes it in the constructor of the current class.</p>

<h3 id="factories-and-setters-to-create-ast-elements">Factories and setters to create AST elements</h3>

<p>With <code class="language-plaintext highlighter-rouge">Factory</code> (<a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/factory/Factory.html">javadoc</a>), 
you can get and create all elements of the meta model. For example, if you want 
to create a class with the name “Tacos”, use the factory to create an empty class 
and fill information on the created element to set its name.</p>

<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">CtClass</span> <span class="n">newClass</span> <span class="o">=</span> <span class="n">factory</span><span class="o">.</span><span class="na">Core</span><span class="o">().</span><span class="na">createClass</span><span class="o">();</span>
<span class="n">newClass</span><span class="o">.</span><span class="na">setSimpleName</span><span class="o">(</span><span class="s">"Tacos"</span><span class="o">);</span>
</code></pre></div></div>

<p>First, create a new field. To do that, create the type referenced by our field. 
This type is a <code class="language-plaintext highlighter-rouge">java.util.List</code> which have a <code class="language-plaintext highlighter-rouge">java.util.Date</code> as generic type.</p>

<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">final</span> <span class="nc">CtTypeReference</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;</span> <span class="n">dateRef</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCtTypeReference</span><span class="o">(</span><span class="nc">Date</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
<span class="kd">final</span> <span class="nc">CtTypeReference</span><span class="o">&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span> <span class="n">listRef</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCtTypeReference</span><span class="o">(</span><span class="nc">List</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
<span class="n">listRef</span><span class="o">.</span><span class="na">addActualTypeArgument</span><span class="o">(</span><span class="n">dateRef</span><span class="o">);</span>
</code></pre></div></div>

<p><code class="language-plaintext highlighter-rouge">dateRef</code>, a <code class="language-plaintext highlighter-rouge">CtTypeReference</code> (<a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/reference/CtTypeReference.html">javadoc</a>), 
is created by our factory from <code class="language-plaintext highlighter-rouge">Date.class</code> given by Java. We also created <code class="language-plaintext highlighter-rouge">listRef</code> which 
is created by our factory from <code class="language-plaintext highlighter-rouge">List.class</code> and we add our <code class="language-plaintext highlighter-rouge">dateRef</code> as actual type argument 
which represents the generic type of the list.</p>

<p>Now, create the field. A field has a name, a type and private.</p>

<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">final</span> <span class="nc">CtField</span><span class="o">&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span> <span class="n">listOfDates</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Core</span><span class="o">().&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span><span class="n">createField</span><span class="o">();</span>
<span class="n">listOfDates</span><span class="o">.</span><span class="na">setSimpleName</span><span class="o">(</span><span class="s">"dates"</span><span class="o">);</span>
<span class="n">listOfDates</span><span class="o">.</span><span class="na">setType</span><span class="o">(</span><span class="n">listRef</span><span class="o">);</span>
<span class="n">listOfDates</span><span class="o">.</span><span class="na">addModifier</span><span class="o">(</span><span class="nc">ModifierKind</span><span class="o">.</span><span class="na">PRIVATE</span><span class="o">);</span>
</code></pre></div></div>

<p>We have created a field named “dates”, with a private visibility and typed by our previous type reference, 
<code class="language-plaintext highlighter-rouge">listRef</code>, which is <code class="language-plaintext highlighter-rouge">java.util.List&lt;java.util.Date&gt;</code>.</p>

<p>Second, create the constructor. Before the creation of a <code class="language-plaintext highlighter-rouge">CtConstructor</code> (<a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/declaration/CtConstructor.html">javadoc</a>), 
create all objects necessary for this constructor and set them in the target constructor. 
The constructor has a parameter typed by the same type of the field previously created 
and has a body to assign the parameter to the field.</p>

<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">final</span> <span class="nc">CtCodeSnippetStatement</span> <span class="n">statementInConstructor</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCodeSnippetStatement</span><span class="o">(</span><span class="s">"this.dates = dates"</span><span class="o">);</span>

<span class="kd">final</span> <span class="nc">CtBlock</span><span class="o">&lt;?&gt;</span> <span class="n">ctBlockOfConstructor</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCtBlock</span><span class="o">(</span><span class="n">statementInConstructor</span><span class="o">);</span>

<span class="kd">final</span> <span class="nc">CtParameter</span><span class="o">&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span> <span class="n">parameter</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Core</span><span class="o">().&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span><span class="n">createParameter</span><span class="o">();</span>
<span class="n">parameter</span><span class="o">.</span><span class="na">setType</span><span class="o">(</span><span class="n">listRef</span><span class="o">);</span>
<span class="n">parameter</span><span class="o">.</span><span class="na">setSimpleName</span><span class="o">(</span><span class="s">"dates"</span><span class="o">);</span>

<span class="kd">final</span> <span class="nc">CtConstructor</span> <span class="n">constructor</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Core</span><span class="o">().</span><span class="na">createConstructor</span><span class="o">();</span>
<span class="n">constructor</span><span class="o">.</span><span class="na">setBody</span><span class="o">(</span><span class="n">ctBlockOfConstructor</span><span class="o">);</span>
<span class="n">constructor</span><span class="o">.</span><span class="na">setParameters</span><span class="o">(</span><span class="nc">Collections</span><span class="o">.&lt;</span><span class="nc">CtParameter</span><span class="o">&lt;?&gt;&gt;</span><span class="n">singletonList</span><span class="o">(</span><span class="n">parameter</span><span class="o">));</span>
<span class="n">constructor</span><span class="o">.</span><span class="na">addModifier</span><span class="o">(</span><span class="nc">ModifierKind</span><span class="o">.</span><span class="na">PUBLIC</span><span class="o">);</span>
</code></pre></div></div>

<p><em>Wow! Wait … What is <code class="language-plaintext highlighter-rouge">CtCodeSnippetStatement</code>?</em></p>

<p>You can convert any string in a <code class="language-plaintext highlighter-rouge">CtStatement</code> (<a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/code/CtStatement.html">javadoc</a>) 
with <code class="language-plaintext highlighter-rouge">createCodeSnippetStatement(String statement)</code> or in <code class="language-plaintext highlighter-rouge">CtExpression</code> (<a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/code/CtExpression.html">javadoc</a>) 
with <code class="language-plaintext highlighter-rouge">createCodeSnippetExpression(String expression)</code>. In our case, we convert <code class="language-plaintext highlighter-rouge">this.dates = dates</code> 
in a <code class="language-plaintext highlighter-rouge">CtAssignement</code> (<a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/reflect/code/CtAssignment.html">javadoc</a>) 
with an assignment and an assigned element.</p>

<p>With this last example, you have created a statement that you have put in a block. 
You have created a parameter typed by the same type as the field and 
you have put all these objects in the constructor.</p>

<p>Finally, apply all transformations in your processor:</p>

<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">ClassProcessor</span> <span class="kd">extends</span> <span class="nc">AbstractProcessor</span><span class="o">&lt;</span><span class="nc">CtClass</span><span class="o">&lt;?&gt;&gt;</span> <span class="o">{</span>
	<span class="nd">@Override</span>
	<span class="kd">public</span> <span class="kt">void</span> <span class="nf">process</span><span class="o">(</span><span class="nc">CtClass</span><span class="o">&lt;?&gt;</span> <span class="n">ctClass</span><span class="o">)</span> <span class="o">{</span>
		<span class="c1">// Creates field.</span>
		<span class="kd">final</span> <span class="nc">CtTypeReference</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;</span> <span class="n">dateRef</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCtTypeReference</span><span class="o">(</span><span class="nc">Date</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
		<span class="kd">final</span> <span class="nc">CtTypeReference</span><span class="o">&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span> <span class="n">listRef</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCtTypeReference</span><span class="o">(</span><span class="nc">List</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
		<span class="n">listRef</span><span class="o">.</span><span class="na">addActualTypeArgument</span><span class="o">(</span><span class="n">dateRef</span><span class="o">);</span>
		<span class="kd">final</span> <span class="nc">CtField</span><span class="o">&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span> <span class="n">listOfDates</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Core</span><span class="o">().&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span><span class="n">createField</span><span class="o">();</span>
		<span class="n">listOfDates</span><span class="o">.&lt;</span><span class="nc">CtField</span><span class="o">&gt;</span><span class="n">setType</span><span class="o">(</span><span class="n">listRef</span><span class="o">);</span>
		<span class="n">listOfDates</span><span class="o">.&lt;</span><span class="nc">CtField</span><span class="o">&gt;</span><span class="n">addModifier</span><span class="o">(</span><span class="nc">ModifierKind</span><span class="o">.</span><span class="na">PRIVATE</span><span class="o">);</span>
		<span class="n">listOfDates</span><span class="o">.</span><span class="na">setSimpleName</span><span class="o">(</span><span class="s">"dates"</span><span class="o">);</span>

		<span class="c1">// Creates constructor.</span>
		<span class="kd">final</span> <span class="nc">CtCodeSnippetStatement</span> <span class="n">statementInConstructor</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCodeSnippetStatement</span><span class="o">(</span><span class="s">"this.dates = dates"</span><span class="o">);</span>
		<span class="kd">final</span> <span class="nc">CtBlock</span><span class="o">&lt;?&gt;</span> <span class="n">ctBlockOfConstructor</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Code</span><span class="o">().</span><span class="na">createCtBlock</span><span class="o">(</span><span class="n">statementInConstructor</span><span class="o">);</span>
		<span class="kd">final</span> <span class="nc">CtParameter</span><span class="o">&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span> <span class="n">parameter</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Core</span><span class="o">().&lt;</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Date</span><span class="o">&gt;&gt;</span><span class="n">createParameter</span><span class="o">();</span>
		<span class="n">parameter</span><span class="o">.&lt;</span><span class="nc">CtParameter</span><span class="o">&gt;</span><span class="n">setType</span><span class="o">(</span><span class="n">listRef</span><span class="o">);</span>
		<span class="n">parameter</span><span class="o">.</span><span class="na">setSimpleName</span><span class="o">(</span><span class="s">"dates"</span><span class="o">);</span>
		<span class="kd">final</span> <span class="nc">CtConstructor</span> <span class="n">constructor</span> <span class="o">=</span> <span class="n">getFactory</span><span class="o">().</span><span class="na">Core</span><span class="o">().</span><span class="na">createConstructor</span><span class="o">();</span>
		<span class="n">constructor</span><span class="o">.</span><span class="na">setBody</span><span class="o">(</span><span class="n">ctBlockOfConstructor</span><span class="o">);</span>
		<span class="n">constructor</span><span class="o">.</span><span class="na">setParameters</span><span class="o">(</span><span class="nc">Collections</span><span class="o">.&lt;</span><span class="nc">CtParameter</span><span class="o">&lt;?&gt;&gt;</span><span class="n">singletonList</span><span class="o">(</span><span class="n">parameter</span><span class="o">));</span>
		<span class="n">constructor</span><span class="o">.</span><span class="na">addModifier</span><span class="o">(</span><span class="nc">ModifierKind</span><span class="o">.</span><span class="na">PUBLIC</span><span class="o">);</span>

		<span class="c1">// Apply transformation.</span>
		<span class="n">ctClass</span><span class="o">.</span><span class="na">addField</span><span class="o">(</span><span class="n">listOfDates</span><span class="o">);</span>
		<span class="n">ctClass</span><span class="o">.</span><span class="na">addConstructor</span><span class="o">(</span><span class="n">constructor</span><span class="o">);</span>
	<span class="o">}</span>
<span class="o">}</span>
</code></pre></div></div>

<h3 id="refactoring-transformations">Refactoring transformations</h3>

<p>Spoon provides some methods for automated refactoring:.</p>

<ul>
  <li><a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/refactoring/CtRenameLocalVariableRefactoring.html">Local Variable Refactoring</a>
class, renames local variables and includes extra checking to ensure program correctness after renaming,</li>
  <li><a href="http://spoon.gforge.inria.fr/mvnsites/spoon-core/apidocs/spoon/refactoring/CtRenameGenericVariableRefactoring.html">Generic Variable Refactoring</a>
class, renames any variable type (field, parameter, local), but does not do any extra checking to ensure program correctness.</li>
  <li><code class="language-plaintext highlighter-rouge">Refactoring</code> contains helper methods for refactoring, incl. one for automated removal of deprecated methods.</li>
</ul>






















































































































































</div>

<hr class="shaded"/> 

<footer>
            <div class="row">
                <div class="col-lg-12 footer">
               	<a href="https://github.com/INRIA/spoon/issues/new">Contact / Feedback / Question / Bug Report</a><br />
                </div>
            </div>
        </footer>

      </div><!-- /.row -->

    </div>    <!-- /.container -->

  </body>

  
  <!-- the google_analytics_id gets auto inserted from the config file -->


<script>
    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
            m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
    })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
    ga('create', 'UA-24273081-1', 'auto');
    ga('send', 'pageview');
</script>

  

</html>
