org.powermock.core.transformers.javassist

Class MethodSizeMockTransformer

java.lang.Object

org.powermock.core.transformers.javassist.AbstractJavaAssistMockTransformer

org.powermock.core.transformers.javassist.MethodMockTransformer

org.powermock.core.transformers.javassist.MethodSizeMockTransformer

All Implemented Interfaces:

MockTransformer<javassist.CtClass>

public class MethodSizeMockTransformer
extends MethodMockTransformer

According to JVM specification method size must be lower than 65536 bytes. When that limit is exceeded class loader will fail to load the class. Since instrumentation can increase method size significantly it must be ensured that JVM limit is not exceeded.

When the limit is exceeded method's body is replaced by exception throw. Method is then instrumented again to allow mocking and suppression.

See Also:

JVM specification

Field Summary

Fields

Modifier and Type	Field and Description
private static int	MAX_METHOD_CODE_LENGTH_LIMIT

Constructor Summary

Constructors

Constructor and Description
MethodSizeMockTransformer(TransformStrategy strategy)

Method Summary

Modifier and Type	Method and Description
private boolean	isMethodSizeExceeded(javassist.CtMethod method)
javassist.CtClass	transform(javassist.CtClass clazz)

Methods inherited from class org.powermock.core.transformers.javassist.MethodMockTransformer

modifyMethod

Methods inherited from class org.powermock.core.transformers.javassist.AbstractJavaAssistMockTransformer

getStrategy, transform

Methods inherited from class java.lang.Object

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

Field Detail

MAX_METHOD_CODE_LENGTH_LIMIT

private static final int MAX_METHOD_CODE_LENGTH_LIMIT

See Also:

Constant Field Values

Constructor Detail

MethodSizeMockTransformer

public MethodSizeMockTransformer(TransformStrategy strategy)

Method Detail

transform

public javassist.CtClass transform(javassist.CtClass clazz)
                            throws javassist.CannotCompileException,
                                   javassist.NotFoundException

Specified by:

transform in class AbstractJavaAssistMockTransformer

Throws:

javassist.CannotCompileException

javassist.NotFoundException

isMethodSizeExceeded

private boolean isMethodSizeExceeded(javassist.CtMethod method)