org.apache.tuscany.sca.implementation.java.introspect.impl
Class JavaIntrospectionHelper

java.lang.Object
  org.apache.tuscany.sca.implementation.java.introspect.impl.JavaIntrospectionHelper

public final class JavaIntrospectionHelper
extends java.lang.Object

Implements various reflection-related operations

Method Summary

static boolean	exactMethodMatch(java.lang.reflect.Method method1, java.lang.reflect.Method method2) Determines if two methods "match" - that is, they have the same method names and exact parameter types (one is not a supertype of the other)
static java.lang.reflect.Field	findClosestMatchingField(java.lang.String name, java.lang.Class type, java.util.Set<java.lang.reflect.Field> fields) Finds the closest matching field with the given name, that is, a field of the exact specified type or, alternately, of a supertype.
static java.lang.reflect.Method	findClosestMatchingMethod(java.lang.String name, java.lang.Class[] types, java.util.Set<java.lang.reflect.Method> methods) Finds the closest matching method with the given name, that is, a method taking the exact parameter types or, alternately, parameter supertypes.
static java.util.Set<java.lang.Class>	getAllInterfaces(java.lang.Class clazz) Returns the set of interfaces implemented by the given class and its ancestors or a blank set if none
static java.util.Set<java.lang.reflect.Field>	getAllPublicAndProtectedFields(java.lang.Class clazz, boolean validating) Returns a collection of public, and protected fields declared by a class or one of its supertypes
static java.util.Set<java.lang.reflect.Method>	getAllUniquePublicProtectedMethods(java.lang.Class clazz, boolean validating) Returns a collection of public and protected methods declared by a class or one of its supertypes.
static java.lang.Class<?>	getArrayType(java.lang.Class<?> componentType, int dims)
static java.lang.String	getBaseName(java.lang.Class<?> implClass) Returns the simple name of a class - i.e.
static java.lang.Class<?>	getBaseType(java.lang.Class<?> cls, java.lang.reflect.Type genericType)
static java.lang.Class<?>	getBusinessInterface(java.lang.Class<?> cls, java.lang.reflect.Type callableReferenceType)
static <T> java.lang.reflect.Constructor<T>	getDefaultConstructor(java.lang.Class<T> clazz)
static java.lang.Class<?>	getErasure(java.lang.reflect.Type type)
static java.util.List<? extends java.lang.reflect.Type>	getGenerics(java.lang.reflect.Type genericType) Returns the generic types represented in the given type.
static java.lang.reflect.Type	getParameterType(java.lang.reflect.Type type)
static java.util.Set<java.lang.reflect.Field>	getPrivateFields(java.lang.Class clazz)
static java.util.Set<java.lang.reflect.Method>	getPrivateMethods(java.lang.Class clazz)
static java.lang.String	getSignature(java.lang.Class<?> cls)
static java.lang.Class	introspectGeneric(java.lang.Class<?> clazz, int pos) Returns the generic type specified by the class at the given position as in: public class Foo{ //..
static boolean	isGetter(java.lang.reflect.Method method)
static boolean	isImmutable(java.lang.Class clazz)
static boolean	isSetter(java.lang.reflect.Method method)
static java.lang.String	toGetter(java.lang.String name) Takes a property name and converts it to a getter method name according to JavaBean conventions.
static java.lang.String	toPropertyName(java.lang.String name) Takes a setter or getter method name and converts it to a property name according to JavaBean conventions.
static java.lang.String	toSetter(java.lang.String name) Takes a property name and converts it to a setter method name according to JavaBean conventions.

Methods inherited from class java.lang.Object

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

Method Detail

getAllPublicAndProtectedFields

public static java.util.Set<java.lang.reflect.Field> getAllPublicAndProtectedFields(java.lang.Class clazz,
                                                                                    boolean validating)

Returns a collection of public, and protected fields declared by a class or one of its supertypes

getAllUniquePublicProtectedMethods

public static java.util.Set<java.lang.reflect.Method> getAllUniquePublicProtectedMethods(java.lang.Class clazz,
                                                                                         boolean validating)

Returns a collection of public and protected methods declared by a class or one of its supertypes. Note that overridden methods will not be returned in the collection (i.e. only the method override will be).

This method can potentially be expensive as reflection information is not cached. It is assumed that this method will be used during a configuration phase.

findClosestMatchingField

public static java.lang.reflect.Field findClosestMatchingField(java.lang.String name,
                                                               java.lang.Class type,
                                                               java.util.Set<java.lang.reflect.Field> fields)

Finds the closest matching field with the given name, that is, a field of the exact specified type or, alternately, of a supertype.

Parameters:

name - the name of the field

type - the field type

fields - the collection of fields to search

Returns:

the matching field or null if not found

findClosestMatchingMethod

public static java.lang.reflect.Method findClosestMatchingMethod(java.lang.String name,
                                                                 java.lang.Class[] types,
                                                                 java.util.Set<java.lang.reflect.Method> methods)

Finds the closest matching method with the given name, that is, a method taking the exact parameter types or, alternately, parameter supertypes.

Parameters:

name - the name of the method

types - the method parameter types

methods - the collection of methods to search

Returns:

the matching method or null if not found

exactMethodMatch

public static boolean exactMethodMatch(java.lang.reflect.Method method1,
                                       java.lang.reflect.Method method2)

Determines if two methods "match" - that is, they have the same method names and exact parameter types (one is not a supertype of the other)

getDefaultConstructor

public static <T> java.lang.reflect.Constructor<T> getDefaultConstructor(java.lang.Class<T> clazz)
                                                              throws java.lang.NoSuchMethodException

Throws:

java.lang.NoSuchMethodException

getBaseName

public static java.lang.String getBaseName(java.lang.Class<?> implClass)

Returns the simple name of a class - i.e. the class name devoid of its package qualifier

Parameters:

implClass - the implementation class

isImmutable

public static boolean isImmutable(java.lang.Class clazz)

toGetter

public static java.lang.String toGetter(java.lang.String name)

Takes a property name and converts it to a getter method name according to JavaBean conventions. For example, property foo is returned as getFoo

toPropertyName

public static java.lang.String toPropertyName(java.lang.String name)

Takes a setter or getter method name and converts it to a property name according to JavaBean conventions. For example, setFoo(var) is returned as property foo

getErasure

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

getBaseType

public static java.lang.Class<?> getBaseType(java.lang.Class<?> cls,
                                             java.lang.reflect.Type genericType)

getParameterType

public static java.lang.reflect.Type getParameterType(java.lang.reflect.Type type)

getBusinessInterface

public static java.lang.Class<?> getBusinessInterface(java.lang.Class<?> cls,
                                                      java.lang.reflect.Type callableReferenceType)

toSetter

public static java.lang.String toSetter(java.lang.String name)

Takes a property name and converts it to a setter method name according to JavaBean conventions. For example, the property foo is returned as setFoo(var)

getGenerics

public static java.util.List<? extends java.lang.reflect.Type> getGenerics(java.lang.reflect.Type genericType)

Returns the generic types represented in the given type. Usage as follows: JavaIntrospectionHelper.getGenerics(field.getGenericType());

JavaIntrospectionHelper.getGenerics(m.getGenericParameterTypes()[0];);

Returns:

the generic types in order of declaration or an empty array if the type is not genericized

introspectGeneric

public static java.lang.Class introspectGeneric(java.lang.Class<?> clazz,
                                                int pos)

Returns the generic type specified by the class at the given position as in:

public class Foo{ //.. }

JavaIntrospectionHelper.introspectGeneric(Foo.class,1);

will return Baz.

getAllInterfaces

public static java.util.Set<java.lang.Class> getAllInterfaces(java.lang.Class clazz)

Returns the set of interfaces implemented by the given class and its ancestors or a blank set if none

isSetter

public static boolean isSetter(java.lang.reflect.Method method)

isGetter

public static boolean isGetter(java.lang.reflect.Method method)

getSignature

public static java.lang.String getSignature(java.lang.Class<?> cls)

getArrayType

public static java.lang.Class<?> getArrayType(java.lang.Class<?> componentType,
                                              int dims)
                                       throws java.lang.ClassNotFoundException

Throws:

java.lang.ClassNotFoundException

getPrivateMethods

public static java.util.Set<java.lang.reflect.Method> getPrivateMethods(java.lang.Class clazz)

getPrivateFields

public static java.util.Set<java.lang.reflect.Field> getPrivateFields(java.lang.Class clazz)