Package 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 Object

Utility methods to simplify checks for feature installers.

Since:

01.09.2014

Method Summary

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

Methods inherited from class java.lang.Object

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

Method Details

hasAnnotation

public static boolean hasAnnotation(Class<?> type,
 Class<? extends 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(Class<?> type,
 Class<? extends 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 Annotation> T getAnnotation(Class<?> type,
 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 Annotation> Annotation getAnnotatedAnnotation(Class<?> type,
 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(Class<?> type,
 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 String getInstallerExtName(Class<? extends FeatureInstaller> installer)

Utility call to prettify logs.

Parameters:

installer - installer class

Returns:

installer name to use in logs

findMethod

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

Parameters:

type - examining type

name - method name

args - method argument types

Returns:

found method

invokeMethod

public static <T> T invokeMethod(Method method,
 Object instance,
 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> 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