com.vaadin.flow.migration

Class ClassPathIntrospector

java.lang.Object

com.vaadin.flow.migration.ClassPathIntrospector

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

RewriteLegacyAnnotationsStep

public abstract class ClassPathIntrospector
extends Object
implements Serializable

Abstract class which allows to find classes in the project classpath.

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ClassPathIntrospector(ClassFinder finder) Creates a new instance of class.
	ClassPathIntrospector(ClassPathIntrospector otherIntrospector) Create a new instance but reusing the instrospector.

Method Summary

Modifier and Type	Method and Description
protected Object	doInvokeAnnotationMethod(Annotation target, String methodName) Get the value of the method methodName from the target annotation.
protected Stream<Class<?>>	getAnnotatedClasses(Class<? extends Annotation> annotationInProjectContext) Gets the classes annotated with the given annotationInProjectContext annotation.
protected URL	getResource(String name) Returns a resource URL given a file name.
protected Stream<Class<?>>	getSubtypes(Class<?> type) Gets the subtypes of the given type.
protected <T> T	invokeAnnotationMethod(Annotation target, String methodName) Get the value of the method methodName from the target annotation.
<T> Class<T>	loadClassInProjectClassLoader(String className) Returns the annotation class by its FQN.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassPathIntrospector

protected ClassPathIntrospector(ClassFinder finder)

Creates a new instance of class.

Parameters:

finder - the ClassFinder instance to use for class searches.

ClassPathIntrospector

public ClassPathIntrospector(ClassPathIntrospector otherIntrospector)

Create a new instance but reusing the instrospector.

Parameters:

otherIntrospector - the other instance.

Method Detail

getResource

protected URL getResource(String name)

Returns a resource URL given a file name.

Parameters:

name - the name of the resource

Returns:

the URL with the resource or null if not found

getAnnotatedClasses

protected Stream<Class<?>> getAnnotatedClasses(Class<? extends Annotation> annotationInProjectContext)

Gets the classes annotated with the given annotationInProjectContext annotation.

Parameters:

annotationInProjectContext - annotation class

Returns:

all classes annotated with the given annotation

getSubtypes

protected Stream<Class<?>> getSubtypes(Class<?> type)

Gets the subtypes of the given type.

Parameters:

type - super type for subtype search

Returns:

all subtypes of the given type

loadClassInProjectClassLoader

public <T> Class<T> loadClassInProjectClassLoader(String className)

Returns the annotation class by its FQN.

Note that the resulting class is loaded by project classloader ( not the maven plugin classloader).

Type Parameters:

T - the class to be loaded

Parameters:

className - the FQN of the class to load

Returns:

the class with the given className loaded by the project class loader

invokeAnnotationMethod

protected <T> T invokeAnnotationMethod(Annotation target,
                                       String methodName)

Get the value of the method methodName from the target annotation.

Parameters:

target - the target annotation

methodName - the method name to execute

Returns:

the Value of the execution result

doInvokeAnnotationMethod

protected Object doInvokeAnnotationMethod(Annotation target,
                                          String methodName)

Get the value of the method methodName from the target annotation.

Parameters:

target - the target annotation

methodName - the method name to execute

Returns:

the result of method methodName invocation on the target