com.qmetry.qaf.automation.util

Class ClassUtil

java.lang.Object

com.qmetry.qaf.automation.util.ClassUtil

public final class ClassUtil
extends java.lang.Object

com.qmetry.qaf.automation.util.ClassUtil.java

Author:

chirag.jayswal

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ClassUtil.TypeInfo

Constructor Summary

Constructors

Constructor and Description
ClassUtil()

Method Summary

Modifier and Type	Method and Description
static void	extractInterfaces(java.util.Set<java.lang.Class<?>> iSet, java.lang.Class<?> clazz)
static java.lang.reflect.Type	getActualValueOfTypevariable(java.lang.Class<?> clazz, java.lang.reflect.TypeVariable<?> typevariable) Finds an actual value of a type variable.
static java.lang.reflect.Field[]	getAllFields(java.lang.Class<?> clazz, java.lang.Class<?> uptoParent) Get all fields of the class including parent up to given level in hierarchy.
static java.util.Set<java.lang.reflect.Method>	getAllMethodsWithAnnotation(java.lang.Class<?> cls, java.lang.Class<? extends java.lang.annotation.Annotation> annotation)
static java.util.Set<java.lang.reflect.Method>	getAllMethodsWithAnnotation(java.lang.String packageName, java.lang.Class<? extends java.lang.annotation.Annotation> annotation)
static <T extends java.lang.annotation.Annotation> T	getAnnotation(java.lang.Class<?> clazz, java.lang.Class<T> annotation)
static <T extends java.lang.annotation.Annotation> T	getAnnotation(java.lang.reflect.Method method, java.lang.Class<T> annotation)
static java.lang.Class<?>	getClass(java.lang.reflect.Type typeOfT)
static java.util.List<java.lang.Class<?>>	getClasses(java.lang.String pkg)
static java.lang.Class	getCollectionBaseType(java.lang.Class type, java.lang.reflect.Type genericType)
static java.lang.reflect.Field	getField(java.lang.String fieldName, java.lang.Class<?> clazz)
static java.lang.Object	getField(java.lang.String fieldName, java.lang.Object classObj)
static java.lang.reflect.Type[]	getGenericParameterTypesOfGenericInterfaceMethod(java.lang.Class clazz, java.lang.reflect.Method method) Given an interface Method, look in the implementing class for the method that implements the interface's method to obtain generic type information.
static java.lang.reflect.Type	getGenericReturnTypeOfGenericInterfaceMethod(java.lang.Class clazz, java.lang.reflect.Method method) Given an interface Method, look in the implementing class for the method that implements the interface's method to obtain generic type information.
static <C> C	getInstance() Get instance of Parameterized class by calling default constructor.
static java.lang.Class	getMapKeyType(java.lang.reflect.Type genericType)
static java.lang.Class	getMapValueType(java.lang.reflect.Type genericType)
static java.lang.reflect.Method	getMethod(java.lang.Class<?> clazz, java.lang.String name) Get all methods of the class including parent.
static java.lang.String	getMethodSignture(java.lang.reflect.Method m, boolean includeClass)
static java.lang.Class<?>	getRawType(java.lang.reflect.Type type)
static java.lang.Class<?>	getRawTypeNoException(java.lang.reflect.Type type)
static java.lang.Class	getTemplateParameterOfInterface(java.lang.Class base, java.lang.Class desiredInterface)
static java.lang.Class<?>	getTypeArgument(java.lang.reflect.Type genericType) Returns the type argument from a parameterized type
static boolean	hasAnnotation(java.lang.reflect.Method method, java.lang.Class<? extends java.lang.annotation.Annotation> annotation)
static boolean	isAssignableFrom(java.lang.reflect.Type typeOfT, java.lang.Class<?> clazz)
static boolean	isPrimitiveOrWrapperType(java.lang.Class<?> clazz)
static boolean	isWrapperType(java.lang.Class<?> clazz)
static <T> T	newInstance(java.lang.reflect.Constructor<T> constructor, java.lang.Object... parameters)
static <T> T	newInstanceOrNull(java.lang.Class<T> clazz)
static void	setField(java.lang.String fieldName, java.lang.Object classObj, java.lang.Object value)

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassUtil

public ClassUtil()

Method Detail

getAllMethodsWithAnnotation

public static java.util.Set<java.lang.reflect.Method> getAllMethodsWithAnnotation(java.lang.String packageName,
                                                                                  java.lang.Class<? extends java.lang.annotation.Annotation> annotation)

getAllMethodsWithAnnotation

public static java.util.Set<java.lang.reflect.Method> getAllMethodsWithAnnotation(java.lang.Class<?> cls,
                                                                                  java.lang.Class<? extends java.lang.annotation.Annotation> annotation)

hasAnnotation

public static boolean hasAnnotation(java.lang.reflect.Method method,
                                    java.lang.Class<? extends java.lang.annotation.Annotation> annotation)

getAnnotation

public static <T extends java.lang.annotation.Annotation> T getAnnotation(java.lang.reflect.Method method,
                                                                          java.lang.Class<T> annotation)

getAnnotation

public static <T extends java.lang.annotation.Annotation> T getAnnotation(java.lang.Class<?> clazz,
                                                                          java.lang.Class<T> annotation)

getClasses

public static java.util.List<java.lang.Class<?>> getClasses(java.lang.String pkg)
                                                     throws java.io.IOException

Throws:

java.io.IOException

getMethod

public static java.lang.reflect.Method getMethod(java.lang.Class<?> clazz,
                                                 java.lang.String name)
                                          throws java.lang.NoSuchMethodException

Get all methods of the class including parent.

Parameters:

clazz -

name - case-insensitive method name to get

Returns:

Throws:

java.lang.NoSuchMethodException

getAllFields

public static java.lang.reflect.Field[] getAllFields(java.lang.Class<?> clazz,
                                                     java.lang.Class<?> uptoParent)

Get all fields of the class including parent up to given level in hierarchy.

Parameters:

clazz -

uptoParent - - restrict hierarchy - to exclude fields from provided class and it's parent(s) in hierarchy

Returns:

extractInterfaces

public static void extractInterfaces(java.util.Set<java.lang.Class<?>> iSet,
                                     java.lang.Class<?> clazz)

getInstance

public static <C> C getInstance()

Get instance of Parameterized class by calling default constructor. Will work only if Parameterized class has default constructor

Type Parameters:

C -

Returns:

instance of the parameter

newInstanceOrNull

public static <T> T newInstanceOrNull(java.lang.Class<T> clazz)

newInstance

public static <T> T newInstance(java.lang.reflect.Constructor<T> constructor,
                                java.lang.Object... parameters)

getMethodSignture

public static java.lang.String getMethodSignture(java.lang.reflect.Method m,
                                                 boolean includeClass)

getTemplateParameterOfInterface

public static java.lang.Class getTemplateParameterOfInterface(java.lang.Class base,
                                                              java.lang.Class desiredInterface)

getGenericReturnTypeOfGenericInterfaceMethod

public static java.lang.reflect.Type getGenericReturnTypeOfGenericInterfaceMethod(java.lang.Class clazz,
                                                                                  java.lang.reflect.Method method)

Given an interface Method, look in the implementing class for the method that implements the interface's method to obtain generic type information. This is useful for templatized interfaces like:

 interface Foo<T> {
        @GET
        List<T> get();
 }
 

Parameters:

clazz -

method - interface method

Returns:

getGenericParameterTypesOfGenericInterfaceMethod

public static java.lang.reflect.Type[] getGenericParameterTypesOfGenericInterfaceMethod(java.lang.Class clazz,
                                                                                        java.lang.reflect.Method method)

Given an interface Method, look in the implementing class for the method that implements the interface's method to obtain generic type information. This is useful for templatized interfaces like:

 interface Foo<T> {
        @GET
        List<T> get();
 }
 

Parameters:

clazz -

method - interface method

Returns:

getRawType

public static java.lang.Class<?> getRawType(java.lang.reflect.Type type)

getRawTypeNoException

public static java.lang.Class<?> getRawTypeNoException(java.lang.reflect.Type type)

getTypeArgument

public static java.lang.Class<?> getTypeArgument(java.lang.reflect.Type genericType)

Returns the type argument from a parameterized type

Parameters:

genericType -

Returns:

null if there is no type parameter

getCollectionBaseType

public static java.lang.Class getCollectionBaseType(java.lang.Class type,
                                                    java.lang.reflect.Type genericType)

getMapKeyType

public static java.lang.Class getMapKeyType(java.lang.reflect.Type genericType)

getMapValueType

public static java.lang.Class getMapValueType(java.lang.reflect.Type genericType)

getActualValueOfTypevariable

public static java.lang.reflect.Type getActualValueOfTypevariable(java.lang.Class<?> clazz,
                                                                  java.lang.reflect.TypeVariable<?> typevariable)

Finds an actual value of a type variable. The method looks in a class hierarchy for a class defining the variable and returns the value if present.

Parameters:

clazz -

typevariable -

Returns:

actual type of the type variable

setField

public static void setField(java.lang.String fieldName,
                            java.lang.Object classObj,
                            java.lang.Object value)

getField

public static java.lang.reflect.Field getField(java.lang.String fieldName,
                                               java.lang.Class<?> clazz)
                                        throws java.lang.NoSuchFieldException

Throws:

java.lang.NoSuchFieldException

getField

public static java.lang.Object getField(java.lang.String fieldName,
                                        java.lang.Object classObj)

isWrapperType

public static boolean isWrapperType(java.lang.Class<?> clazz)

Parameters:

clazz -

Returns:

return true if it is any of the wrapper class (i.e. Double, Long) or String or Void

isPrimitiveOrWrapperType

public static boolean isPrimitiveOrWrapperType(java.lang.Class<?> clazz)

isAssignableFrom

public static boolean isAssignableFrom(java.lang.reflect.Type typeOfT,
                                       java.lang.Class<?> clazz)

getClass

public static java.lang.Class<?> getClass(java.lang.reflect.Type typeOfT)