ru.vyarus.dropwizard.guice.module.installer.util

Class FeatureUtils

java.lang.Object

ru.vyarus.dropwizard.guice.module.installer.util.FeatureUtils

public final class FeatureUtils
extends java.lang.Object

Utility methods to simplify checks for feature installers.

Since:

01.09.2014

Method Summary

Modifier and Type	Method and Description
static java.lang.reflect.Method	findMethod(java.lang.Class<?> type, java.lang.String name, java.lang.Class<java.lang.Object>... args)
static <T extends java.lang.annotation.Annotation> java.lang.annotation.Annotation	getAnnotatedAnnotation(java.lang.Class<?> type, java.lang.Class<T> annotation)
static <T extends java.lang.annotation.Annotation> T	getAnnotation(java.lang.Class<?> type, java.lang.Class<T> annotation)
static java.lang.String	getInstallerExtName(java.lang.Class<? extends FeatureInstaller> installer) Utility call to prettify logs.
static <T> java.lang.Class<T>	getInstanceClass(T object) Used to get correct object type even if it's guice proxy.
static boolean	hasAnnotatedAnnotation(java.lang.Class<?> type, java.lang.Class<? extends java.lang.annotation.Annotation> annotation)
static boolean	hasAnnotation(java.lang.Class<?> type, java.lang.Class<? extends java.lang.annotation.Annotation> annotation)
static <T> T	invokeMethod(java.lang.reflect.Method method, java.lang.Object instance, java.lang.Object... args)
static boolean	is(java.lang.Class<?> type, java.lang.Class<?> required)

Methods inherited from class java.lang.Object

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

Method Detail

hasAnnotation

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

Parameters:

type - type to check

annotation - annotation to find

Returns:

true if annotation found on class or super class and type is not abstract, false otherwise

hasAnnotatedAnnotation

public static boolean hasAnnotatedAnnotation(java.lang.Class<?> type,
                                             java.lang.Class<? extends java.lang.annotation.Annotation> annotation)

Parameters:

type - type to check

annotation - annotation to find

Returns:

true if annotation found on one of class or super class annotations and type is not abstract, false otherwise

getAnnotation

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

Type Parameters:

T - annotation type

Parameters:

type - type to examine

annotation - annotation to search

Returns:

found annotation or null

getAnnotatedAnnotation

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

Type Parameters:

T - annotation type

Parameters:

type - type to examine

annotation - annotation which must be found on target annotation

Returns:

annotation annotated with provided annotation type or null if not found

is

public static boolean is(java.lang.Class<?> type,
                         java.lang.Class<?> required)

Parameters:

type - type to check

required - required marker superclass or interface

Returns:

if type implements interface or extends required type and type is not abstract

getInstallerExtName

public static java.lang.String getInstallerExtName(java.lang.Class<? extends FeatureInstaller> installer)

Utility call to prettify logs.

Parameters:

installer - installer class

Returns:

installer name to use in logs

findMethod

@SafeVarargs
public static java.lang.reflect.Method findMethod(java.lang.Class<?> type,
                                                                java.lang.String name,
                                                                java.lang.Class<java.lang.Object>... args)

Parameters:

type - examining type

name - method name

args - method argument types

Returns:

found method

invokeMethod

public static <T> T invokeMethod(java.lang.reflect.Method method,
                                 java.lang.Object instance,
                                 java.lang.Object... args)

Type Parameters:

T - expected type of execution result

Parameters:

method - method to call

instance - object instance to call method on

args - optional arguments

Returns:

method execution result

getInstanceClass

public static <T> java.lang.Class<T> getInstanceClass(T object)

Used to get correct object type even if it's guice proxy.

Type Parameters:

T - object type

Parameters:

object - object to get class of

Returns:

object class