Package org.powermock.core.transformers.impl

Class AbstractMainMockTransformer

java.lang.Object

org.powermock.core.transformers.impl.AbstractMainMockTransformer

All Implemented Interfaces:

MockTransformer

Direct Known Subclasses:

ClassMockTransformer, InterfaceMockTransformer

public abstract class AbstractMainMockTransformer
extends Object
implements MockTransformer

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected final class	AbstractMainMockTransformer.PowerMockExpressionEditor

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	METHOD_CODE_LENGTH_LIMIT
protected final TransformStrategy	strategy
private static final String	VOID

Constructor Summary

Constructors

Constructor	Description
AbstractMainMockTransformer(TransformStrategy strategy)

Method Summary

Modifier and Type	Method	Description
protected String	allowMockingOfPackagePrivateClasses(javassist.CtClass clazz)
protected void	allowMockingOfStaticAndFinalAndNativeMethods(javassist.CtClass clazz)
protected javassist.CtClass	ensureJvmMethodSizeLimit(javassist.CtClass clazz)	According to JVM specification method size must be lower than 65536 bytes.
private String	getCorrectReturnValueType(javassist.CtClass returnTypeAsCtClass)
private String	getReturnTypeAsString(javassist.CtMethod method)
private boolean	isMethodSizeExceeded(javassist.CtMethod method)
private void	modifyMethod(javassist.CtMethod method)
protected void	removeFinalModifierFromAllStaticFinalFields(javassist.CtClass clazz)
protected void	removeFinalModifierFromClass(javassist.CtClass clazz)
protected void	setAllConstructorsToPublic(javassist.CtClass clazz)
protected void	suppressStaticInitializerIfRequested(javassist.CtClass clazz, String name)
javassist.CtClass	transform(javassist.CtClass clazz)	Transforms the clazz.
protected abstract javassist.CtClass	transformMockClass(javassist.CtClass clazz)

Methods inherited from class java.lang.Object

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

Field Details

VOID

private static final String VOID

See Also:

• Constant Field Values

METHOD_CODE_LENGTH_LIMIT

private static final int METHOD_CODE_LENGTH_LIMIT

See Also:

• Constant Field Values

strategy

protected final TransformStrategy strategy

Constructor Details

AbstractMainMockTransformer

public AbstractMainMockTransformer(TransformStrategy strategy)

Method Details

allowMockingOfPackagePrivateClasses

protected String allowMockingOfPackagePrivateClasses(javassist.CtClass clazz)

suppressStaticInitializerIfRequested

protected void suppressStaticInitializerIfRequested(javassist.CtClass clazz,
 String name)
                                             throws javassist.CannotCompileException

Throws:

javassist.CannotCompileException

removeFinalModifierFromClass

protected void removeFinalModifierFromClass(javassist.CtClass clazz)

allowMockingOfStaticAndFinalAndNativeMethods

protected void allowMockingOfStaticAndFinalAndNativeMethods(javassist.CtClass clazz)
                                                     throws javassist.NotFoundException,
javassist.CannotCompileException

Throws:

javassist.NotFoundException

javassist.CannotCompileException

removeFinalModifierFromAllStaticFinalFields

protected void removeFinalModifierFromAllStaticFinalFields(javassist.CtClass clazz)

setAllConstructorsToPublic

protected void setAllConstructorsToPublic(javassist.CtClass clazz)

ensureJvmMethodSizeLimit

protected javassist.CtClass ensureJvmMethodSizeLimit(javassist.CtClass clazz)
                                              throws javassist.CannotCompileException,
javassist.NotFoundException

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.

Throws:

javassist.CannotCompileException

javassist.NotFoundException

See Also:

• JVM specification

isMethodSizeExceeded

private boolean isMethodSizeExceeded(javassist.CtMethod method)

modifyMethod

private void modifyMethod(javassist.CtMethod method)
                   throws javassist.NotFoundException,
javassist.CannotCompileException

Throws:

javassist.NotFoundException

javassist.CannotCompileException

getReturnTypeAsString

private String getReturnTypeAsString(javassist.CtMethod method)
                              throws javassist.NotFoundException

Throws:

javassist.NotFoundException

getCorrectReturnValueType

private String getCorrectReturnValueType(javassist.CtClass returnTypeAsCtClass)

Returns:

The correct return type, i.e. takes care of casting the a wrapper type to primitive type if needed.

transform

public javassist.CtClass transform(javassist.CtClass clazz)
                            throws Exception

Description copied from interface: MockTransformer

Transforms the clazz.

Specified by:

transform in interface MockTransformer

Parameters:

clazz - The class to be transform into a mock enabled class.

Returns:

A CtClass representation of the mocked class.

Throws:

Exception

transformMockClass

protected abstract javassist.CtClass transformMockClass(javassist.CtClass clazz)
                                                 throws javassist.CannotCompileException,
javassist.NotFoundException

Throws:

javassist.CannotCompileException

javassist.NotFoundException