netconf/sal-netconf-connector/src/main/java/org/opendaylight/netconf/sal/connect/netconf/schema/YangLibrarySchemaYangSourceProvider.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.netconf.sal.connect.netconf.schema;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11 import static java.util.Objects.requireNonNull;
  12
  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;
  17 import java.io.InputStream;
  18 import java.net.URL;
  19 import java.util.Map;
  20 import org.opendaylight.netconf.sal.connect.api.RemoteDeviceId;
  21 import org.opendaylight.netconf.sal.connect.netconf.schema.NetconfRemoteSchemaYangSourceProvider.NetconfYangTextSchemaSource;
  22 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceException;
  23 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
  24 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  25 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceProvider;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  * Provides YANG schema sources from yang library.
  31  */
  32 public final class YangLibrarySchemaYangSourceProvider implements SchemaSourceProvider<YangTextSchemaSource> {
  33     private static final Logger LOG = LoggerFactory.getLogger(YangLibrarySchemaYangSourceProvider.class);
  34
  35     private final Map<SourceIdentifier, URL> availableSources;
  36     private final RemoteDeviceId id;
  37
  38     public YangLibrarySchemaYangSourceProvider(final RemoteDeviceId id,
  39             final Map<SourceIdentifier, URL> availableSources) {
  40         this.id = id;
  41         this.availableSources = ImmutableMap.copyOf(availableSources);
  42     }
  43
  44     @Override
  45     public ListenableFuture<? extends YangTextSchemaSource> getSource(final SourceIdentifier sourceIdentifier) {
  46         final URL url = availableSources.get(requireNonNull(sourceIdentifier));
  47         checkArgument(url != null);
  48         try (InputStream in = url.openStream()) {
  49             final byte[] schemaContent = in.readAllBytes();
  50             final NetconfYangTextSchemaSource yangSource = new NetconfYangTextSchemaSource(id, sourceIdentifier,
  51                 url.toString(), schemaContent);
  52             LOG.debug("Source {} downloaded from a yang library's url {}", sourceIdentifier, url);
  53             return Futures.immediateFuture(yangSource);
  54         } catch (IOException e) {
  55             LOG.warn("Unable to download source {} from a yang library's url {}", sourceIdentifier, url, e);
  56             return Futures.immediateFailedFuture(new SchemaSourceException(
  57                 "Unable to download remote schema for " + sourceIdentifier + " from " + url, e));
  58         }
  59     }
  60 }