2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.client.mdsal;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.collect.ImmutableMap;
14 import com.google.common.util.concurrent.Futures;
15 import com.google.common.util.concurrent.ListenableFuture;
16 import java.io.IOException;
18 import java.nio.charset.StandardCharsets;
20 import org.opendaylight.yangtools.yang.model.api.source.SourceIdentifier;
21 import org.opendaylight.yangtools.yang.model.api.source.YangTextSource;
22 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceException;
23 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceProvider;
24 import org.opendaylight.yangtools.yang.model.spi.source.StringYangTextSource;
25 import org.slf4j.Logger;
26 import org.slf4j.LoggerFactory;
29 * Provides YANG schema sources from YANG library. The set of available sources is pre-determined when this provider
30 * is created, but each source is acquired on demand.
32 public final class LibrarySchemaSourceProvider implements SchemaSourceProvider<YangTextSource> {
33 private static final Logger LOG = LoggerFactory.getLogger(LibrarySchemaSourceProvider.class);
35 private final ImmutableMap<SourceIdentifier, URL> availableSources;
37 public LibrarySchemaSourceProvider(final Map<SourceIdentifier, URL> availableSources) {
38 this.availableSources = ImmutableMap.copyOf(availableSources);
42 public ListenableFuture<? extends YangTextSource> getSource(final SourceIdentifier sourceIdentifier) {
43 final var url = availableSources.get(requireNonNull(sourceIdentifier));
44 checkArgument(url != null);
46 final byte[] schemaContent;
47 try (var in = url.openStream()) {
48 schemaContent = in.readAllBytes();
49 } catch (IOException e) {
50 LOG.warn("Unable to download source {} from a yang library's url {}", sourceIdentifier, url, e);
51 return Futures.immediateFailedFuture(new SchemaSourceException(sourceIdentifier,
52 "Unable to download remote schema for " + sourceIdentifier + " from " + url, e));
55 final var yangSource = new StringYangTextSource(sourceIdentifier,
56 new String(schemaContent, StandardCharsets.UTF_8), url.toString());
57 LOG.debug("Source {} downloaded from a yang library's url {}", sourceIdentifier, url);
58 return Futures.immediateFuture(yangSource);