org.jmock.internal

Class ReturnDefaultValueAction

java.lang.Object

org.jmock.internal.ReturnDefaultValueAction

All Implemented Interfaces:

org.hamcrest.SelfDescribing, Action, Invokable

public class ReturnDefaultValueAction
extends java.lang.Object
implements Action

Returns a default value for the invoked method's result type.

• Returns nothing from void methods.
• Returns zero or false results for primitive types.
• Returns zero length instances for arrays and strings.
• Returns empty instances for collections and maps types in java.util.
• Returns imposterised Null Objects for types that can be imposterised by the action's Imposteriser.
• Otherwise returns null.

The default value can be overridden for specific types.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.Class<?>[]	CONCRETE_COLLECTION_TYPES
private Imposteriser	imposteriser
private java.util.Map<java.lang.Class<?>,java.lang.Object>	resultValuesByType

Constructor Summary

Constructors

Constructor and Description
ReturnDefaultValueAction()
ReturnDefaultValueAction(Imposteriser imposteriser)
ReturnDefaultValueAction(Imposteriser imposteriser, java.util.Map<java.lang.Class<?>,java.lang.Object> typeToResultValue)

Method Summary

Modifier and Type	Method and Description
void	addResult(java.lang.Class<?> resultType, java.lang.Object resultValue)
private static boolean	cannotCreateNewInstance(java.lang.Class<?> returnType)
private static java.lang.Object	collectionOrMapInstanceFor(java.lang.Class<?> returnType)
protected static java.util.Map<java.lang.Class<?>,java.lang.Object>	createDefaultResults()
void	describeTo(org.hamcrest.Description description)
private static java.lang.Object	instanceForCollectionType(java.lang.Class<?> type)
java.lang.Object	invoke(Invocation invocation) Performs an action in response to an invocation.
private static boolean	isCollectionOrMap(java.lang.Class<?> type)
void	setImposteriser(Imposteriser newImposteriser)

Methods inherited from class java.lang.Object

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

Field Detail

CONCRETE_COLLECTION_TYPES

private static final java.lang.Class<?>[] CONCRETE_COLLECTION_TYPES

resultValuesByType

private final java.util.Map<java.lang.Class<?>,java.lang.Object> resultValuesByType

imposteriser

private Imposteriser imposteriser

Constructor Detail

ReturnDefaultValueAction

public ReturnDefaultValueAction(Imposteriser imposteriser,
                                java.util.Map<java.lang.Class<?>,java.lang.Object> typeToResultValue)

ReturnDefaultValueAction

public ReturnDefaultValueAction(Imposteriser imposteriser)

ReturnDefaultValueAction

public ReturnDefaultValueAction()

Method Detail

setImposteriser

public void setImposteriser(Imposteriser newImposteriser)

describeTo

public void describeTo(org.hamcrest.Description description)

Specified by:

describeTo in interface org.hamcrest.SelfDescribing

addResult

public void addResult(java.lang.Class<?> resultType,
                      java.lang.Object resultValue)

invoke

public java.lang.Object invoke(Invocation invocation)
                        throws java.lang.Throwable

Description copied from interface: Invokable

Performs an action in response to an invocation.

Specified by:

invoke in interface Invokable

Parameters:

invocation - The invocation to perform.

Returns:

The result of the invocation, if not throwing an exception. Must return null if the invoked method has a void return type.

Throws:

java.lang.Throwable - An exception to be thrown to the caller, if not returning a value. Any checked exception thrown must be in the throws list of the invoked method.

collectionOrMapInstanceFor

private static java.lang.Object collectionOrMapInstanceFor(java.lang.Class<?> returnType)
                                                    throws java.lang.Throwable

Throws:

java.lang.Throwable

instanceForCollectionType

private static java.lang.Object instanceForCollectionType(java.lang.Class<?> type)
                                                   throws java.lang.Throwable

Throws:

java.lang.Throwable

isCollectionOrMap

private static boolean isCollectionOrMap(java.lang.Class<?> type)

cannotCreateNewInstance

private static boolean cannotCreateNewInstance(java.lang.Class<?> returnType)

createDefaultResults

protected static java.util.Map<java.lang.Class<?>,java.lang.Object> createDefaultResults()