/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.beam.sdk.transforms.reflect;
import java.lang.reflect.Method;
import java.util.NoSuchElementException;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.reflect.DoFnSignatures.FnAnalysisContext;
import org.apache.beam.sdk.values.TypeDescriptor;
/** Utilities for use in {@link DoFnSignatures} tests. */
class DoFnSignaturesTestUtils {
/** An empty base {@link DoFn} class. */
static class FakeDoFn extends DoFn<Integer, String> {}
/** An error reporter. */
static DoFnSignatures.ErrorReporter errors() {
return new DoFnSignatures.ErrorReporter(null, "[test]");
}
/**
* A class for testing utilities that take {@link Method} objects. Use like this:
*
* <pre>{@code
* Method m = new AnonymousMethod() {
* SomeReturnValue method(SomeParameters...) { ... }
* }.getMethod(); // Will return the Method for "method".
* }</pre>
*/
static class AnonymousMethod {
final Method getMethod() throws Exception {
for (Method method : getClass().getDeclaredMethods()) {
if (method.getName().equals("method")) {
return method;
}
}
throw new NoSuchElementException("No method named 'method' defined on " + getClass());
}
}
static DoFnSignature.ProcessElementMethod analyzeProcessElementMethod(AnonymousMethod method)
throws Exception {
return DoFnSignatures.analyzeProcessElementMethod(
errors(),
TypeDescriptor.of(FakeDoFn.class),
method.getMethod(),
TypeDescriptor.of(Integer.class),
TypeDescriptor.of(String.class),
FnAnalysisContext.create());
}
}