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<a href="#querying-a-bibtex-file" class="md-nav__link">
Querying a BibTeX file
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<a href="#how-can-i-access-all-publications" class="md-nav__link">
How can I access all publications?
</a>
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<a href="#how-can-i-access-a-publication" class="md-nav__link">
How can I access a publication?
</a>
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<a href="#how-can-i-access-and-change-the-properties-of-a-particular-publication" class="md-nav__link">
How can I access and change the properties of a particular publication?
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<a href="#adding-a-bibtex-file-to-your-launch-configuration" class="md-nav__link">
Adding a BibTeX file to your launch configuration
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Unsupported features
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<h1 id="scripting-bibtex-files-using-epsilon">Scripting BibTeX files using Epsilon<a class="headerlink" href="#scripting-bibtex-files-using-epsilon" title="Permanent link">&para;</a></h1>
<p>In this article we demonstrate how you can query list of references stored in BibTeX files in Epsilon programs using the BibTeX EMC driver. All the examples in this article demonstrate using EOL to script BibTeX files. However, it's worth stressing that BibTeX files are supported throughout Epsilon. Therefore, you can use Epsilon to (cross-)validate, transform (to other models - XML or EMF-based -, or to text), compare and merge your BibTeX files.</p>
<h2 id="querying-a-bibtex-file">Querying a BibTeX file<a class="headerlink" href="#querying-a-bibtex-file" title="Permanent link">&para;</a></h2>
<p>We use the following <code>eclipse.bib</code> as a base for demonstrating the EOL
syntax for querying BibTeX files.</p>
<div class="highlight"><pre><span></span><code><span class="nc">@book</span><span class="p">{</span><span class="nl">steinberg09emf</span><span class="p">,</span>
<span class="na">author</span> <span class="p">=</span> <span class="s">{Steinberg, D. and Budinsky, F. and Paternostro, M. and Merks, E.}</span><span class="p">,</span>
<span class="na">title</span> <span class="p">=</span> <span class="s">{{EMF}: {E}clipse {M}odeling {F}ramework}</span><span class="p">,</span>
<span class="na">year</span> <span class="p">=</span> <span class="s">{2008}</span><span class="p">,</span>
<span class="na">publisher</span> <span class="p">=</span> <span class="s">{Addison-Wesley Professional}</span><span class="p">,</span>
<span class="na">address</span> <span class="p">=</span> <span class="s">{Boston, Massachusetts}</span>
<span class="p">}</span>
<span class="nc">@inproceedings</span><span class="p">{</span><span class="nl">gronback06gmf</span><span class="p">,</span>
<span class="na">author</span> <span class="p">=</span> <span class="s">{Gronback, R.}</span><span class="p">,</span>
<span class="na">title</span> <span class="p">=</span> <span class="s">{Introduction to the {Eclipse Graphical Modeling Framework}}</span><span class="p">,</span>
<span class="na">booktitle</span> <span class="p">=</span> <span class="s">{Proc. EclipseCon}</span><span class="p">,</span>
<span class="na">year</span> <span class="p">=</span> <span class="s">{2006}</span><span class="p">,</span>
<span class="na">address</span> <span class="p">=</span> <span class="s">{Santa Clara, California}</span>
<span class="p">}</span>
<span class="nc">@article</span><span class="p">{</span><span class="nl">brooks86nosilverbullet</span><span class="p">,</span>
<span class="na">author</span> <span class="p">=</span> <span class="s">{Brooks Jr., F.P.}</span><span class="p">,</span>
<span class="na">title</span> <span class="p">=</span> <span class="s">{No Silver Bullet - Essence and Accidents of Software Engineering}</span><span class="p">,</span>
<span class="na">journal</span> <span class="p">=</span> <span class="s">{IEEE Computer}</span><span class="p">,</span>
<span class="na">volume</span> <span class="p">=</span> <span class="s">{20}</span><span class="p">,</span>
<span class="na">number</span> <span class="p">=</span> <span class="s">{4}</span><span class="p">,</span>
<span class="na">year</span> <span class="p">=</span> <span class="s">{1987}</span><span class="p">,</span>
<span class="na">pages</span> <span class="p">=</span> <span class="s">{10-19}</span><span class="p">,</span>
<span class="p">}</span>
</code></pre></div>
<h2 id="how-can-i-access-all-publications">How can I access all publications?<a class="headerlink" href="#how-can-i-access-all-publications" title="Permanent link">&para;</a></h2>
<p>Presuming that we have specified the name <code>MyPubs</code> when loading the BibTeX file as a model, the <code>allContents</code> method can be used to access all of the entries in the BibTeX file:</p>
<pre class="prettyprint lang-eol"><code>// Get all publications
var publications = MyPubs.allContents();</code></pre>
<h2 id="how-can-i-access-a-publication">How can I access a publication?<a class="headerlink" href="#how-can-i-access-a-publication" title="Permanent link">&para;</a></h2>
<p>Publications (entries) in a BibTeX file can be accessed by type:</p>
<pre class="prettyprint lang-eol"><code>// Get all @book elements
var books = Book.all;
// Get a random book
var b = Book.all.random();</code></pre>
<p>Note that the BibTeX driver recognises only those types defined in your BibTeX file. For example, attempting to call <code>Phdthesis.all</code> will result in an error for the BibTeX file shown above, as that BibTeX file contains no <code>@phdthesis</code> entries.</p>
<h2 id="how-can-i-access-and-change-the-properties-of-a-particular-publication">How can I access and change the properties of a particular publication?<a class="headerlink" href="#how-can-i-access-and-change-the-properties-of-a-particular-publication" title="Permanent link">&para;</a></h2>
<p>Properties are accessed via the dot notation:</p>
<pre class="prettyprint lang-eol"><code>// Get a random book
var b = Book.all.random();
// Get the title of the random book
var t = b.title;
// Get the Amazon rating of the random book
var a = b.amazonRating;</code></pre>
<p>Note that the empty string is returned when accessing a property that does not exist (such as the amazonRating property in the example above).</p>
<p>Properties can be changed using an assignment statement:</p>
<pre class="prettyprint lang-eol"><code>// Get a random book
var b = Book.all.random();
// Get the title of the random book
b.title = "On the Criteria To Be Used in Decomposing Systems into Modules"</code></pre>
<p>Note that the current version of the BibTeX driver does not support saving changes to disk. Any changes made to properties are volatile (and persist only during the duration of the Epsilon program's execution).</p>
<h2 id="adding-a-bibtex-file-to-your-launch-configuration">Adding a BibTeX file to your launch configuration<a class="headerlink" href="#adding-a-bibtex-file-to-your-launch-configuration" title="Permanent link">&para;</a></h2>
<p>To add a BibTeX file to your Epsilon launch configuration, you need to select "Show all model types" and then choose "BibTeX model" from the list of available model types.</p>
<p><img alt="" src="select.png" /></p>
<p>Then you can configure the details of your BibTeX (name, file etc.) in the screen that pops up.</p>
<p><img alt="" src="configure.png" /></p>
<h2 id="unsupported-features">Unsupported features<a class="headerlink" href="#unsupported-features" title="Permanent link">&para;</a></h2>
<p>The current version of the BibTeX driver for Epsilon is not yet a complete implementation. In particular, the following features are not yet supported:</p>
<ul>
<li>Storing changes to BibTeX models to disk.</li>
<li>Deleting entries from a BibTeX file.</li>
</ul>
<p>Please file an enhancement request on the <a href="https://bugs.eclipse.org/bugs/enter_bug.cgi?product=GMT&amp;component=Epsilon">Epsilon
bugzilla</a>
if you require -- or can provide a patch for -- these features.</p>
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