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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<h2 title="Class KeyFactory" class="title">Class KeyFactory</h2>
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<li>java.lang.Object</li>
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<pre>public abstract class <span class="strong">KeyFactory</span>
extends java.lang.Object</pre>
<div class="block">Generates classes to handle multi-valued keys, for use in things such as Maps and Sets.
 Code for <code>equals</code> and <code>hashCode</code> methods follow the
 the rules laid out in <i>Effective Java</i> by Joshua Bloch. 
 <p>
 To generate a <code>KeyFactory</code>, you need to supply an interface which
 describes the structure of the key. The interface should have a
 single method named <code>newInstance</code>, which returns an
 <code>Object</code>. The arguments array can be
 <i>anything</i>--Objects, primitive values, or single or
 multi-dimension arrays of either. For example:
 <p><pre>
     private interface IntStringKey {
         public Object newInstance(int i, String s);
     }
 </pre><p>
 Once you have made a <code>KeyFactory</code>, you generate a new key by calling
 the <code>newInstance</code> method defined by your interface.
 <p><pre>
     IntStringKey factory = (IntStringKey)KeyFactory.create(IntStringKey.class);
     Object key1 = factory.newInstance(4, "Hello");
     Object key2 = factory.newInstance(4, "World");
 </pre><p>
 <b>Note:</b>
 <code>hashCode</code> equality between two keys <code>key1</code> and <code>key2</code> is only guaranteed if
 <code>key1.equals(key2)</code> <i>and</i> the keys were produced by the same factory.</div>
<dl><dt><span class="strong">Version:</span></dt>
  <dd>$Id: KeyFactory.java,v 1.26 2006/03/05 02:43:19 herbyderby Exp $</dd></dl>
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<pre>public static&nbsp;<a href="../../../../net/sf/cglib/core/KeyFactory.html" title="class in net.sf.cglib.core">KeyFactory</a>&nbsp;create(java.lang.ClassLoader&nbsp;loader,
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