randoop.instrument

Class CoveredClassTransformer

java.lang.Object

randoop.instrument.CoveredClassTransformer

All Implemented Interfaces:

java.lang.instrument.ClassFileTransformer

public class CoveredClassTransformer
extends java.lang.Object
implements java.lang.instrument.ClassFileTransformer

A java.lang.instrument.ClassTransformer that instruments loaded classes to determine if covered. Does the following instrumentation of each class:

1. Adds a static boolean flag to the class. Initially set to false.
2. Adds a statement at the beginning of each method and constructor that sets the flag.
3. Adds a static method that polls and resets the value of the flag.

Avoids instrumenting JDK and JUnit classes and skips interfaces. Otherwise, all other classes are instrumented.

See Also:

CoveredClassAgent, modifyClass(CtClass)

Method Summary

Modifier and Type	Method and Description
byte[]	transform(@Nullable java.lang.ClassLoader loader, java.lang.String className, @Nullable java.lang.Class<?> classBeingRedefined, java.security.ProtectionDomain protectionDomain, byte[] classfileBuffer)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

transform

public byte[] transform(@Nullable java.lang.ClassLoader loader,
                        java.lang.String className,
                        @Nullable java.lang.Class<?> classBeingRedefined,
                        java.security.ProtectionDomain protectionDomain,
                        byte[] classfileBuffer)
                 throws java.lang.instrument.IllegalClassFormatException

Transforms bytecode for a class by adding "covered" instrumentation. Avoids JDK and JUnit classes, interfaces and any "frozen" classes that have already been loaded.

Specified by:

transform in interface java.lang.instrument.ClassFileTransformer

Throws:

java.lang.instrument.IllegalClassFormatException