2 * Copyright (c) 2017 Pantheon Technologies, s.r.o. 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.yang_version;
10 import com.google.common.collect.ImmutableList;
11 import org.eclipse.jdt.annotation.NonNull;
12 import org.opendaylight.yangtools.yang.common.YangVersion;
13 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
14 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
15 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
16 import org.opendaylight.yangtools.yang.model.api.stmt.YangVersionEffectiveStatement;
17 import org.opendaylight.yangtools.yang.model.api.stmt.YangVersionStatement;
18 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
19 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
20 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
21 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
22 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
23 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
25 public final class YangVersionStatementSupport
26 extends BaseStatementSupport<YangVersion, YangVersionStatement, YangVersionEffectiveStatement> {
27 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
30 private static final YangVersionStatementSupport INSTANCE = new YangVersionStatementSupport();
32 private static final @NonNull EmptyYangVersionStatement EMPTY_VER1_DECL =
33 new EmptyYangVersionStatement(YangVersion.VERSION_1);
34 private static final @NonNull EmptyYangVersionStatement EMPTY_VER1_1_DECL =
35 new EmptyYangVersionStatement(YangVersion.VERSION_1_1);
36 private static final @NonNull EmptyYangVersionEffectiveStatement EMPTY_VER1_EFF =
37 new EmptyYangVersionEffectiveStatement(EMPTY_VER1_DECL);
38 private static final @NonNull EmptyYangVersionEffectiveStatement EMPTY_VER1_1_EFF =
39 new EmptyYangVersionEffectiveStatement(EMPTY_VER1_1_DECL);
41 private YangVersionStatementSupport() {
42 super(YangStmtMapping.YANG_VERSION, CopyPolicy.CONTEXT_INDEPENDENT);
45 public static YangVersionStatementSupport getInstance() {
50 public YangVersion parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
51 return SourceException.unwrap(YangVersion.parse(value), ctx.sourceReference(), "Unsupported YANG version %s",
56 public void onPreLinkageDeclared(
57 final Mutable<YangVersion, YangVersionStatement, YangVersionEffectiveStatement> stmt) {
58 stmt.setRootVersion(stmt.argument());
62 protected SubstatementValidator getSubstatementValidator() {
63 return SUBSTATEMENT_VALIDATOR;
67 protected YangVersionStatement createDeclared(final StmtContext<YangVersion, YangVersionStatement, ?> ctx,
68 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
69 return new RegularYangVersionStatement(ctx.getArgument(), substatements);
73 protected YangVersionStatement createEmptyDeclared(final StmtContext<YangVersion, YangVersionStatement, ?> ctx) {
74 final YangVersion argument = ctx.getArgument();
77 return EMPTY_VER1_DECL;
79 return EMPTY_VER1_1_DECL;
81 throw new IllegalStateException("Unhandled version " + argument);
86 protected YangVersionEffectiveStatement createEffective(final Current<YangVersion, YangVersionStatement> stmt,
87 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
88 return substatements.isEmpty() ? createEmptyEffective(stmt.declared())
89 : new RegularYangVersionEffectiveStatement(stmt.declared(), substatements);
92 private static @NonNull YangVersionEffectiveStatement createEmptyEffective(final YangVersionStatement declared) {
93 if (EMPTY_VER1_DECL.equals(declared)) {
94 return EMPTY_VER1_EFF;
95 } else if (EMPTY_VER1_1_DECL.equals(declared)) {
96 return EMPTY_VER1_1_EFF;
98 return new EmptyYangVersionEffectiveStatement(declared);