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/*
* Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance
* with the License. A copy of the License is located at
*
* http://aws.amazon.com/apache2.0/
*
* or in the "license" file accompanying this file. This file 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 ai.djl.translate;
import ai.djl.Model;
import ai.djl.modality.cv.translator.ImageClassificationTranslatorFactory;
import ai.djl.ndarray.NDList;
import ai.djl.util.Pair;
import java.lang.reflect.Type;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/** A default implementation of {@link TranslatorFactory}. */
public class DefaultTranslatorFactory implements TranslatorFactory {
protected Map, Translator> translators;
private ServingTranslatorFactory servingTranslatorFactory = new ServingTranslatorFactory();
private ImageClassificationTranslatorFactory imageClassificationTranslatorFactory =
new ImageClassificationTranslatorFactory();
/**
* Registers a {@link Translator} with the {@code TranslatorFactory}.
*
* @param input the input data type
* @param output the output data type
* @param translator the {@code Translator} to be registered
* @param the model input type
* @param the model output type
*/
public void registerTranslator(
Class input, Class output, Translator translator) {
if (translators == null) {
translators = new ConcurrentHashMap<>();
}
translators.put(new Pair<>(input, output), translator);
}
/** {@inheritDoc} */
@Override
public Set> getSupportedTypes() {
Set> set = new HashSet<>();
if (translators != null) {
set.addAll(translators.keySet());
}
set.add(new Pair<>(NDList.class, NDList.class));
return set;
}
/** {@inheritDoc} */
@Override
public boolean isSupported(Class input, Class output) {
if (input == NDList.class && output == NDList.class) {
return true;
}
if (translators != null && translators.containsKey(new Pair(input, output))) {
return true;
}
return servingTranslatorFactory.isSupported(input, output)
|| imageClassificationTranslatorFactory.isSupported(input, output);
}
/** {@inheritDoc} */
@Override
@SuppressWarnings("unchecked")
public Translator newInstance(
Class input, Class output, Model model, Map arguments)
throws TranslateException {
if (translators != null) {
Translator translator = translators.get(new Pair(input, output));
if (translator != null) {
return (Translator) translator;
}
}
if (input == NDList.class && output == NDList.class) {
return (Translator) new NoopTranslator();
}
if (servingTranslatorFactory.isSupported(input, output)) {
return servingTranslatorFactory.newInstance(input, output, model, arguments);
}
if (imageClassificationTranslatorFactory.isSupported(input, output)) {
return imageClassificationTranslatorFactory.newInstance(
input, output, model, arguments);
}
return null;
}
}