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<h2 title="Class LangFunction" class="title">Class LangFunction</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
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<li>org.jaxen.function.LangFunction</li>
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<pre>public class <span class="typeNameLabel">LangFunction</span>
extends java.lang.Object
implements <a href="../../../org/jaxen/Function.html" title="interface in org.jaxen">Function</a></pre>
<div class="block"><p>
<b>4.3</b> <code><i>boolean</i> lang(<i>string</i>)</code>
</p>
<blockquote src="http://www.w3.org/TR/xpath#function-lang">
<p>
The <b>lang</b> function returns true or false depending on whether
the language of the context node as specified by
<code>xml:lang</code> attributes is the same as or is a sublanguage
of the language specified by the argument string. The language of the
context node is determined by the value of the <code>xml:lang</code>
attribute on the context node, or, if the context node has no
<code>xml:lang</code> attribute, by the value of the
<code>xml:lang</code> attribute on the nearest ancestor of the
context node that has an <code>xml:lang</code> attribute. If there
is no such attribute, then <b><a href="#function-lang">lang</a></b>
returns false. If there is such an attribute, then <b><a
href="#function-lang">lang</a></b> returns true if the attribute
value is equal to the argument ignoring case, or if there is some
suffix starting with <code>-</code> such that the attribute value
is equal to the argument ignoring that suffix of the attribute value
and ignoring case. For example, <code>lang("en")</code> would
return true if the context node is any of these five elements:
</p>
<pre>
<para xml:lang="en"/>
<div xml:lang="en"><para/></div>
<para xml:lang="EN"/>
<para xml:lang="en-us"/>
</pre>
</blockquote></div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Attila Szegedi (szegedia @ freemail.hu)</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="http://www.w3.org/TR/xpath#function-lang"
target="_top">XPath Specification</a></dd>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/jaxen/function/LangFunction.html#LangFunction--">LangFunction</a></span>()</code>
<div class="block">Create a new <code>LangFunction</code> object.</div>
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<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/jaxen/function/LangFunction.html#call-org.jaxen.Context-java.util.List-">call</a></span>(<a href="../../../org/jaxen/Context.html" title="class in org.jaxen">Context</a> context,
java.util.List args)</code>
<div class="block">
Determines whether or not the context node is written in the language specified
by the XPath string-value of <code>args.get(0)</code>,
as determined by the nearest <code>xml:lang</code> attribute in scope.</div>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>LangFunction</h4>
<pre>public LangFunction()</pre>
<div class="block">Create a new <code>LangFunction</code> object.</div>
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<h4>call</h4>
<pre>public java.lang.Object call(<a href="../../../org/jaxen/Context.html" title="class in org.jaxen">Context</a> context,
java.util.List args)
throws <a href="../../../org/jaxen/FunctionCallException.html" title="class in org.jaxen">FunctionCallException</a></pre>
<div class="block"><p>
Determines whether or not the context node is written in the language specified
by the XPath string-value of <code>args.get(0)</code>,
as determined by the nearest <code>xml:lang</code> attribute in scope.
</p></div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../org/jaxen/Function.html#call-org.jaxen.Context-java.util.List-">call</a></code> in interface <code><a href="../../../org/jaxen/Function.html" title="interface in org.jaxen">Function</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - the context in which to evaluate the <code>lang()</code> function</dd>
<dd><code>args</code> - the arguments to the lang function</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>Boolean</code> indicating whether the context node is written in
the specified language</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../org/jaxen/FunctionCallException.html" title="class in org.jaxen">FunctionCallException</a></code> - if <code>args</code> does not have length one</dd>
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