2 * Copyright (c) 2018 Pantheon Technologies, s.r.o. 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.xpath.impl;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import java.util.Optional;
14 import java.util.function.Function;
15 import org.opendaylight.yangtools.yang.common.QName;
16 import org.opendaylight.yangtools.yang.common.QNameModule;
18 final class QNameSupport {
19 private final Function<String, QNameModule> prefixes;
20 private final QNameModule implicitNamespace;
22 QNameSupport(final QNameModule implicitNamespace, final Function<String, QNameModule> prefixes) {
23 this.implicitNamespace = requireNonNull(implicitNamespace);
24 this.prefixes = requireNonNull(prefixes);
27 QName createQName(final String localName) {
28 return QName.create(implicitNamespace, localName);
31 QName createQName(final String prefix, final String localName) {
32 final QNameModule namespace = prefixes.apply(prefix);
33 checkArgument(namespace != null, "Failed to lookup namespace for prefix %s", prefix);
34 return QName.create(namespace, localName);
37 Optional<QNameModule> resolvePrefix(final String prefix) {
38 return Optional.ofNullable(prefixes.apply(requireNonNull(prefix)));