org.codehaus.groovy.runtime
Class MetaClassHelper

java.lang.Object
  org.codehaus.groovy.runtime.MetaClassHelper

public class MetaClassHelper
extends Object

Author:

John Wilson, Jochen Theodorou

Field Summary

static Object[]	ARRAY_WITH_NULL
static Object[]	EMPTY_ARRAY
static Class[]	EMPTY_TYPE_ARRAY
protected static Logger	LOG

Constructor Summary

MetaClassHelper()

Method Summary

static boolean	accessibleToConstructor(Class at, Constructor constructor)
static Object	asPrimitiveArray(List list, Class parameterType)
static Object[]	asWrapperArray(Object parameters, Class componentType)
static long	calculateParameterDistance(Class[] arguments, Class[] parameters)
static String	capitalize(String property)
static Object	chooseEmptyMethodParams(FastArray methods)
static Object	chooseMostGeneralMethodWith1NullParam(FastArray methods)
static boolean	containsMatchingMethod(List list, MetaMethod method)
static Class[]	convertToTypeArray(Object[] args) param instance array to the type array
static Object	doConstructorInvoke(CachedConstructor constructor, Object[] argumentArray)
static Object	doMethodInvoke(Object object, MetaMethod method, Object[] argumentArray)
protected static String	getClassName(Object object)
static Closure	getMethodPointer(Object object, String methodName) Returns a callable object for the given method name on the object.
static ParameterTypes	getParameterTypes(Object methodOrConstructor)
static boolean	isAssignableFrom(Class classToTransformTo, Class classToTransformFrom)
static boolean	isGenericSetMethod(MetaMethod method)
protected static boolean	isSuperclass(Class claszz, Class superclass)
static boolean	isValidMethod(Object method, Class[] arguments, boolean includeCoerce)
static boolean	isValidMethod(ParameterTypes pt, Class[] arguments, boolean includeCoerce)
static void	logMethodCall(Object object, String methodName, Object[] arguments)
static Object	makeArray(Object obj, Class secondary, int length)
static Object	makeCommonArray(Object[] arguments, int offset, Class fallback)
protected static String	normalizedValue(Object argument)
static boolean	parametersAreCompatible(Class[] arguments, Class[] parameters)
protected static String	shortName(Object object)
static Class[]	wrap(Class[] classes)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_ARRAY

public static final Object[] EMPTY_ARRAY

EMPTY_TYPE_ARRAY

public static final Class[] EMPTY_TYPE_ARRAY

ARRAY_WITH_NULL

public static final Object[] ARRAY_WITH_NULL

LOG

protected static final Logger LOG

Constructor Detail

MetaClassHelper

public MetaClassHelper()

Method Detail

accessibleToConstructor

public static boolean accessibleToConstructor(Class at,
                                              Constructor constructor)

asWrapperArray

public static Object[] asWrapperArray(Object parameters,
                                      Class componentType)

asPrimitiveArray

public static Object asPrimitiveArray(List list,
                                      Class parameterType)

Parameters:

list - the original list

parameterType - the resulting array type

Returns:

the constructed array

calculateParameterDistance

public static long calculateParameterDistance(Class[] arguments,
                                              Class[] parameters)

capitalize

public static String capitalize(String property)

chooseEmptyMethodParams

public static Object chooseEmptyMethodParams(FastArray methods)

Parameters:

methods - the methods to choose from

Returns:

the method with 1 parameter which takes the most general type of object (e.g. Object)

chooseMostGeneralMethodWith1NullParam

public static Object chooseMostGeneralMethodWith1NullParam(FastArray methods)

Parameters:

methods - the methods to choose from

Returns:

the method with 1 parameter which takes the most general type of object (e.g. Object) ignoring primitve types

containsMatchingMethod

public static boolean containsMatchingMethod(List list,
                                             MetaMethod method)

Parameters:

list - a list of MetaMethods

method - the MetaMethod of interest

Returns:

true if a method of the same matching prototype was found in the list

convertToTypeArray

public static Class[] convertToTypeArray(Object[] args)

param instance array to the type array

Parameters:

args - the arguments

Returns:

the types of the arguments

doConstructorInvoke

public static Object doConstructorInvoke(CachedConstructor constructor,
                                         Object[] argumentArray)

makeCommonArray

public static Object makeCommonArray(Object[] arguments,
                                     int offset,
                                     Class fallback)

makeArray

public static Object makeArray(Object obj,
                               Class secondary,
                               int length)

doMethodInvoke

public static Object doMethodInvoke(Object object,
                                    MetaMethod method,
                                    Object[] argumentArray)

getClassName

protected static String getClassName(Object object)

getMethodPointer

public static Closure getMethodPointer(Object object,
                                       String methodName)

Returns a callable object for the given method name on the object. The object acts like a Closure in that it can be called, like a closure and passed around - though really its a method pointer, not a closure per se.

Parameters:

object - the object containing the method

methodName - the method of interest

Returns:

the resulting closure-like method pointer

getParameterTypes

public static ParameterTypes getParameterTypes(Object methodOrConstructor)

isAssignableFrom

public static boolean isAssignableFrom(Class classToTransformTo,
                                       Class classToTransformFrom)

isGenericSetMethod

public static boolean isGenericSetMethod(MetaMethod method)

isSuperclass

protected static boolean isSuperclass(Class claszz,
                                      Class superclass)

parametersAreCompatible

public static boolean parametersAreCompatible(Class[] arguments,
                                              Class[] parameters)

isValidMethod

public static boolean isValidMethod(ParameterTypes pt,
                                    Class[] arguments,
                                    boolean includeCoerce)

isValidMethod

public static boolean isValidMethod(Object method,
                                    Class[] arguments,
                                    boolean includeCoerce)

logMethodCall

public static void logMethodCall(Object object,
                                 String methodName,
                                 Object[] arguments)

normalizedValue

protected static String normalizedValue(Object argument)

shortName

protected static String shortName(Object object)

wrap

public static Class[] wrap(Class[] classes)