2 * Copyright (c) 2014 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/eplv10.html
8 package org.opendaylight.yangtools.yang.model.repo.spi;
10 import com.google.common.annotations.Beta;
11 import com.google.common.base.Optional;
12 import com.google.common.util.concurrent.ListenableFuture;
14 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceRepresentation;
15 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
18 * Schema source provider implementations take care of resolving a {@link SourceIdentifier}
19 * into a particular representation of the schema source. Examples of resolution include
20 * fetching the source from an external source, opening a classpath resource, or similar.
22 * @param <T> Schema source representation type provided by this implementation
25 public interface SchemaSourceProvider<T extends SchemaSourceRepresentation> {
27 * Returns a representation a for supplied YANG source identifier. The resolution
28 * criteria are as follows:
31 * <li> If the source identifier specifies a revision, this method returns either
32 * a representation of that particular revision, or report the identifier as absent
33 * by returning {@link Optional#absent()}.
34 * <li> If the source identifier does not specify a revision, this method returns
35 * the newest available revision, or {@link Optional#absent()}.
37 * In either case the returned representation is required to report a non-null
38 * revision in the {@link SourceIdentifier} returned from
39 * {@link SchemaSourceRepresentation#getIdentifier()}.
41 * Implementations are not required to provide constant behavior in time, notably
42 * this different invocation of this method may produce different results.
44 * @param sourceIdentifier source identifier
45 * @return source representation if supplied YANG module is available
46 * {@link Optional#absent()} otherwise.
48 ListenableFuture<Optional<T>> getSource(SourceIdentifier sourceIdentifier);