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/epl-v10.html
8 package org.opendaylight.yangtools.yang.model.repo.api;
10 import com.google.common.annotations.Beta;
11 import com.google.common.collect.ImmutableList;
12 import com.google.common.util.concurrent.FluentFuture;
13 import com.google.common.util.concurrent.ListenableFuture;
14 import org.eclipse.jdt.annotation.NonNull;
15 import org.opendaylight.yangtools.util.concurrent.FluentFutures;
18 * A filter of schema sources. This is used to restrict which sources representation instances are allowed
19 * to participate in construction of a schema context. This allows, for example, to create an non-shared island,
20 * or require the sources to be certified before use.
23 public interface SchemaSourceFilter {
25 * A {@link SchemaSourceFilter} which accepts any schema source it is presented with.
27 @NonNull SchemaSourceFilter ALWAYS_ACCEPT = new SchemaSourceFilter() {
28 private final ImmutableList<Class<? extends SchemaSourceRepresentation>> representations =
29 ImmutableList.of(SchemaSourceRepresentation.class);
32 public ImmutableList<Class<? extends SchemaSourceRepresentation>> supportedRepresentations() {
33 return representations;
37 public FluentFuture<Boolean> apply(final SchemaSourceRepresentation schemaSource) {
38 return FluentFutures.immediateTrueFluentFuture();
43 * Get the representations this filter supports. A schema source is translated
44 * into one of these representations before it is presented for filtering.
46 * @return Set of supported representations.
48 Iterable<Class<? extends SchemaSourceRepresentation>> supportedRepresentations();
51 * Check if a particular schema source is acceptable to the filter. The process
52 * of checking may be asynchronous, but at some point it needs to produce an
53 * affirmative or negative answer before the schema context construction can
56 * @param schemaSource Schema source to be filtered
57 * @return Promise of a filtering decision. The result should be {@link Boolean#TRUE}
58 * if the source is acceptable.
60 ListenableFuture<Boolean> apply(SchemaSourceRepresentation schemaSource);