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package org.junit.runner;
import org.junit.internal.Classes;
import org.junit.runner.FilterFactory.FilterNotCreatedException;
import org.junit.runner.manipulation.Filter;
/**
* Utility class whose methods create a {@link FilterFactory}.
*/
class FilterFactories {
/**
* Creates a {@link Filter}.
*
* A filter specification is of the form "package.of.FilterFactory=args-to-filter-factory" or
* "package.of.FilterFactory".
*
* @param request the request that will be filtered
* @param filterSpec the filter specification
* @throws org.junit.runner.FilterFactory.FilterNotCreatedException
*/
public static Filter createFilterFromFilterSpec(Request request, String filterSpec)
throws FilterFactory.FilterNotCreatedException {
Description topLevelDescription = request.getRunner().getDescription();
String[] tuple;
if (filterSpec.contains("=")) {
tuple = filterSpec.split("=", 2);
} else {
tuple = new String[]{ filterSpec, "" };
}
return createFilter(tuple[0], new FilterFactoryParams(topLevelDescription, tuple[1]));
}
/**
* Creates a {@link Filter}.
*
* @param filterFactoryFqcn The fully qualified class name of the {@link FilterFactory}
* @param params The arguments to the {@link FilterFactory}
*/
public static Filter createFilter(String filterFactoryFqcn, FilterFactoryParams params)
throws FilterFactory.FilterNotCreatedException {
FilterFactory filterFactory = createFilterFactory(filterFactoryFqcn);
return filterFactory.createFilter(params);
}
/**
* Creates a {@link Filter}.
*
* @param filterFactoryClass The class of the {@link FilterFactory}
* @param params The arguments to the {@link FilterFactory}
*
*/
public static Filter createFilter(Class<? extends FilterFactory> filterFactoryClass, FilterFactoryParams params)
throws FilterFactory.FilterNotCreatedException {
FilterFactory filterFactory = createFilterFactory(filterFactoryClass);
return filterFactory.createFilter(params);
}
static FilterFactory createFilterFactory(String filterFactoryFqcn) throws FilterNotCreatedException {
Class<? extends FilterFactory> filterFactoryClass;
try {
filterFactoryClass = Classes.getClass(filterFactoryFqcn).asSubclass(FilterFactory.class);
} catch (Exception e) {
throw new FilterNotCreatedException(e);
}
return createFilterFactory(filterFactoryClass);
}
static FilterFactory createFilterFactory(Class<? extends FilterFactory> filterFactoryClass)
throws FilterNotCreatedException {
try {
return filterFactoryClass.getConstructor().newInstance();
} catch (Exception e) {
throw new FilterNotCreatedException(e);
}
}
}
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