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/*
* Copyright 2021 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.testing.junit.testparameterinjector;
import java.lang.annotation.Annotation;
import java.util.List;
import java.util.Optional;
/**
* Interface which allows {@link TestParameterAnnotation} annotations to provide the values to test
* in a dynamic way.
*/
interface TestParameterValueProvider {
/**
* Returns the parameter values for which the test should run.
*
* @param annotation The annotation instance that was encountered in the test class. The
* definition of this annotation is itself annotated with the {@link TestParameterAnnotation}
* annotation.
* @param parameterClass The class of the parameter or field that is being annotated. In case the
* annotation is annotating a method, constructor or class, {@code parameterClass} is an empty
* optional.
*/
List<Object> provideValues(Annotation annotation, Optional<Class<?>> parameterClass);
/**
* Returns the class of the list elements returned by {@link #provideValues(Annotation,
* Optional)}.
*
* @param annotationType The type of the annotation that was encountered in the test class. The
* definition of this annotation is itself annotated with the {@link TestParameterAnnotation}
* annotation.
* @param parameterClass The class of the parameter or field that is being annotated. In case the
* annotation is annotating a method, constructor or class, {@code parameterClass} is an empty
* optional.
*/
Class<?> getValueType(
Class<? extends Annotation> annotationType, Optional<Class<?>> parameterClass);
}
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