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.yangtools.yang.parser.rfc7950.stmt;
10 import static java.util.Objects.requireNonNull;
12 import java.util.Optional;
13 import javax.xml.namespace.NamespaceContext;
14 import org.opendaylight.yangtools.yang.common.QNameModule;
15 import org.opendaylight.yangtools.yang.common.YangNamespaceContext;
16 import org.opendaylight.yangtools.yang.parser.rfc7950.namespace.ModuleQNameToPrefix;
17 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
18 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
21 * A {@link NamespaceContext} implementation based on the set of imports and local module namespace.
23 // TODO: this is a useful utility, so it may be useful to expose it either in this package, or yang.parser.spi.source.
24 final class StmtNamespaceContext implements YangNamespaceContext {
25 // FIXME: add serialization barrier
26 private static final long serialVersionUID = 1L;
28 private final StmtContext<?, ?, ?> ctx;
30 StmtNamespaceContext(final StmtContext<?, ?, ?> ctx) {
31 this.ctx = requireNonNull(ctx);
35 public Optional<String> findPrefixForNamespace(final QNameModule namespace) {
36 return Optional.ofNullable(ctx.getFromNamespace(ModuleQNameToPrefix.class, namespace));
40 public Optional<QNameModule> findNamespaceForPrefix(final String prefix) {
41 // TODO: perform caching?
42 return Optional.ofNullable(StmtContextUtils.getModuleQNameByPrefix(ctx, prefix));