ai.djl.repository.SimpleRepository Maven / Gradle / Ivy
/*
* Copyright 2019 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.repository;
import ai.djl.repository.Artifact.Item;
import ai.djl.repository.zoo.DefaultModelZoo;
import ai.djl.util.Progress;
import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.net.URI;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A {@code SimpleRepository} is a {@link Repository} containing only a single artifact without
* requiring a "metadata.json" file.
*
* @see Repository
*/
public class SimpleRepository extends AbstractRepository {
private static final Logger logger = LoggerFactory.getLogger(SimpleRepository.class);
private String name;
private Path path;
/**
* (Internal) Constructs a SimpleRepository.
*
* Use {@link Repository#newInstance(String, String)}.
*
* @param name the name of the repository
* @param path the path to the repository
*/
protected SimpleRepository(String name, Path path) {
this.name = name;
this.path = path;
}
/** {@inheritDoc} */
@Override
public boolean isRemote() {
return false;
}
/** {@inheritDoc} */
@Override
public String getName() {
return name;
}
/** {@inheritDoc} */
@Override
public URI getBaseUri() {
return path.toUri();
}
/** {@inheritDoc} */
@Override
public Metadata locate(MRL mrl) throws IOException {
Path file = path.resolve("metadata.json");
if (Files.isRegularFile(file)) {
logger.debug("Using metadata.json file: {}", file.toAbsolutePath());
return metadataWithFile(file);
}
logger.debug("No metadata.json file found in: {}", path.toAbsolutePath());
return metadataWithoutFile();
}
private Metadata metadataWithFile(Path file) throws IOException {
try (Reader reader = Files.newBufferedReader(file)) {
Metadata metadata = GSON.fromJson(reader, Metadata.class);
metadata.setRepositoryUri(URI.create(""));
return metadata;
}
}
private Metadata metadataWithoutFile() {
Metadata metadata = new Metadata.MatchAllMetadata();
metadata.setRepositoryUri(URI.create(""));
File file = path.toFile();
if (Files.isRegularFile(path)) {
metadata.setArtifactId(file.getParentFile().getName());
} else {
metadata.setArtifactId(file.getName());
}
if (!Files.exists(path)) {
logger.debug("Specified path doesn't exists: {}", path.toAbsolutePath());
return metadata;
}
Artifact artifact = new Artifact();
artifact.setName(file.getName());
Map files = new ConcurrentHashMap<>();
if (file.isDirectory()) {
File[] fileList = file.listFiles();
if (fileList != null) {
for (File f : fileList) {
Item item = new Item();
item.setName(f.getName());
item.setSize(f.length());
item.setArtifact(artifact);
files.put(f.getName(), item);
}
}
}
artifact.setFiles(files);
metadata.setArtifacts(Collections.singletonList(artifact));
return metadata;
}
/** {@inheritDoc} */
@Override
public Artifact resolve(MRL mrl, String version, Map filter)
throws IOException {
List artifacts = locate(mrl).getArtifacts();
if (artifacts.isEmpty()) {
return null;
}
return artifacts.get(0);
}
/** {@inheritDoc} */
@Override
public Path getResourceDirectory(Artifact artifact) {
return path;
}
/** {@inheritDoc} */
@Override
public void prepare(Artifact artifact, Progress progress) {
// Do nothing
}
/** {@inheritDoc} */
@Override
public Path getCacheDirectory() {
return path;
}
/** {@inheritDoc} */
@Override
protected URI resolvePath(Item item, String path) {
return this.path.resolve(item.getName()).toUri();
}
/** {@inheritDoc} */
@Override
public List getResources() {
if (!Files.exists(path)) {
logger.debug("Specified path doesn't exists: {}", path.toAbsolutePath());
return Collections.emptyList();
}
MRL mrl = MRL.undefined(DefaultModelZoo.GROUP_ID, path.toFile().getName());
return Collections.singletonList(mrl);
}
}