mirror of
https://github.com/encounter/cglib.git
synced 2026-03-30 11:03:56 -07:00
Juozas Baliuka
109 lines
3.7 KiB
PHP
109 lines
3.7 KiB
PHP
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML>
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<HEAD>
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<TITLE></TITLE>
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</HEAD>
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<BODY LEFTMARGIN="10" RIGHTMARGIN="0" TOPMARGIN="10"
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BOTTOMMARGIN="10" MARGINHEIGHT="0" MARGINWIDTH="0"
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alink='navy' vlink='navy' link='navy'
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style='background-color:a0c0fe'
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>
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<table cellspacing='0' border='0'>
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<tr>
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<td colspan='5'><A href="http://sourceforge.net">
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<IMG src="http://sourceforge.net/sflogo.php?group_id=56933&type=5" width="210" height="62" border="0" alt="SourceForge Logo">
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</A>
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<p>
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</td>
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</tr>
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<tr>
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<td valign="top" >
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<H5> Project </h5>
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<li><a href='http://sourceforge.net/projects/cglib'> Summary </a>
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<li><a href='http://sourceforge.net/cvs/?group_id=56933'> CVS </a>
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<li><a href='http://sourceforge.net/project/showfiles.php?group_id=56933'>
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Downloads </a>
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<li><a href='http://sourceforge.net/forum/?group_id=56933'> Forum </a>
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<H5> Documentation </h5>
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<!-- Links on the left -->
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<li><a href='api/index.html'> API </a>
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<H5> Samples </h5>
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<li><a href='Trace.html'> Trace </a>
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<li><a href='Beans.html'> Beans </a>
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<H5> Links </h5>
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<li> <a href='http://jakarta.apache.org/bcel'> BCEL </a>
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<li> <a href='http://xorm.sourceforge.net'> XORM </a>
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</td>
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<td width='5%' > </td>
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<td width='10%' style='background-color:ffffff'> </td>
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<td valign='top' style='background-color:ffffff'>
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<!-- Content -->
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<br>
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<h3 align='center'> Code Generation Library </h3>
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<br>
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<p>
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CGLIB outputs generated classes. Byte code generation and class file
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format manipulation is hidden in static methods.
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It was designed to implement Transparent Persistence for JAVA, but
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can be used to implement aspects like Security or Validation.
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<p> Simple example :
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Implement <a href='api/net/sf/cglib/proxy/MethodInterceptor.html'>MethodInterceptor</a>
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<pre >
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<b>public class </b>Trace <b>implements</b> MethodInterceptor{
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<b>private static</b> Trace trace = <b>new</b> Trace();
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<b>public boolean invokeSuper</b>( Object obj, Method method,
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Object args[])<b> throws </b> Throwable{
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<span style="color:green">//invoke supper in generated code</span>
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<b><span style="color:red">System.out.println("before: " + method )</span></b>;
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<b>return true </b>;
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}
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<b>public</b> Object <b>afterReturn</b>(
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Object obj, Method method,
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Object args[],<b>boolean</b> invokedSuper,
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Object retValFromSuper,Throwable e
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)<b>throws</b> Throwable{
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<span style="color:green">//print "this" and method signature </span>
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<b><span style="color:red">System.out.println("after: " + method )</span></b>;
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<b>return</b> retValFromSuper;
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}
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<b>public static</b> Object <b>newInstance</b>(Class clazz){
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<span style="color:green">//generate code</span>
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<b>return <span style="color:red">Enhancer.enhance(clazz, null, trace)</span></b>;
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}
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}
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</pre>
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Use static method to instantiate object:
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<pre>
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List list = (List)Trace.<b>newInstance</b>( Vector.<b>class</b> );
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list.add( "TEST" );
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</pre>
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This code must produce output like this:<br>
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<span style="color:green">
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before: public boolean Vector.add( Object ) <br>
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after: public boolean Vector.add( Object ) <br>
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</span>
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<br>
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<br>
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</td>
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<td width='10%' style='background-color:ffffff'> </td>
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<td width='5%' > </td>
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</tr>
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<table>
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</BODY>
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</HTML>
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