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ajm |
1.1 |
//---PACKAGE DECLARATION--- |
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//---IMPORTS--- |
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import java.util.Hashtable; |
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import java.io.ByteArrayInputStream; |
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import java.io.FileInputStream; |
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/** |
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* <ONE LINE DESCRIPTION> |
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* <DETAILED DESCRIPTION> |
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* |
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* @author $Author: ajm4 $ |
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* @version $Id: TemplateClass.java,v 1.1 2001/05/04 19:03:34 ajm4 Exp $ |
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*/ |
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public class AgentClassLoader extends ClassLoader { |
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//---FINAL / FINAL STATIC ATTRIBUTES--- |
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/** |
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* The current CVS revision of this class |
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*/ |
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public static final String REVISION = "$Revision: 1.1 $"; |
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//---STATIC METHODS--- |
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//---CONSTRUCTORS--- |
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public AgentClassLoader(ClassLoader parent) { |
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super(parent); |
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} |
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//---PUBLIC METHODS--- |
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public void defineAgentClass(byte[] byteCode) throws ClassFormatError { |
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defineClass(null, byteCode, 0, byteCode.length); |
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} |
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public byte[] getBytecode(String className) { |
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byte result[]; |
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try { |
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FileInputStream fi = new FileInputStream(className+".class"); |
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result = new byte[fi.available()]; |
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fi.read(result); |
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return result; |
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} catch (Exception e) { |
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/* |
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* If we caught an exception, either the class wasnt found or it |
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* was unreadable by our process. |
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*/ |
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_logger.write(toString(), Logger.DEBUG, "I/O Error when loading class - " + e); |
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return null; |
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} |
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} |
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.ac.ukc.iscream.util.FormatName class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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*/ |
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public String toString() { |
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return FormatName.getName( |
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_name, |
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getClass().getName(), |
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REVISION); |
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} |
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//---PRIVATE/PROTECTED METHODS--- |
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//---ACCESSOR/MUTATOR METHODS--- |
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//---ATTRIBUTES--- |
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = "AgentClassLoader"; |
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/** |
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* This holds a reference to the |
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* system logger that is being used. |
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*/ |
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private Logger _logger = Logger.getInstance(); |
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//---STATIC ATTRIBUTES--- |
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} |
