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package org.glassfish.api;
import org.jvnet.hk2.annotations.Contract;
import java.util.Hashtable;
/** Third party tool vendors may implement this interface to provide code
* instrumentation to the application server.
*/
@Contract
public interface BytecodePreprocessor {
/** Initialize the profiler instance. This method should be called exactly
* once before any calls to preprocess.
* @param parameters Initialization parameters.
* @return true if initialization succeeded.
*/
public boolean initialize(Hashtable parameters);
/** This function profiler-enables the given class. This method should not
* be called until the initialization method has completed. It is thread-
* safe.
* @param classname The name of the class to process. Used for efficient
* filtering.
* @param classBytes Actual contents of class to process
* @return The instrumented class bytes.
*/
public byte[] preprocess(String classname, byte[] classBytes);
}