2 * Copyright (c) 2020 PANTHEON.tech, 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;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.annotations.Beta;
13 import com.google.common.collect.ImmutableList;
14 import java.util.Collection;
15 import org.eclipse.jdt.annotation.NonNull;
16 import org.opendaylight.yangtools.yang.common.QName;
17 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
18 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
19 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
22 * An abstract base class for {@link DeclaredStatement} implementations. This is a direct competition to
23 * {@link org.opendaylight.yangtools.yang.parser.spi.meta.AbstractDeclaredStatement}, providing lower-footprint
27 public abstract class AbstractDeclaredStatement<A> extends AbstractModelStatement<A> implements DeclaredStatement<A> {
28 protected AbstractDeclaredStatement() {
32 public final StatementSource getStatementSource() {
33 return StatementSource.DECLARATION;
37 public Collection<? extends DeclaredStatement<?>> declaredSubstatements() {
38 // Default to reduce load on subclasses and keep the number of implementations down
39 return ImmutableList.of();
43 * Utility method for recovering singleton lists squashed by {@link #maskList(ImmutableList)}.
45 * @param masked list to unmask
46 * @return Unmasked list
47 * @throws NullPointerException if masked is null
48 * @throws ClassCastException if masked object does not match DeclaredStatement
50 @SuppressWarnings({ "rawtypes", "unchecked" })
51 protected static final @NonNull ImmutableList<? extends DeclaredStatement<?>> unmaskList(
52 final @NonNull Object masked) {
53 return (ImmutableList) unmaskList(masked, DeclaredStatement.class);
56 public abstract static class WithRawArgument<A> extends AbstractDeclaredStatement<A> {
57 private final String rawArgument;
59 protected WithRawArgument(final StmtContext<A, ?, ?> context) {
60 rawArgument = context.rawStatementArgument();
64 public final String rawArgument() {
69 public abstract static class WithQNameArgument extends AbstractDeclaredStatement<QName> {
70 public abstract static class WithSubstatements extends WithQNameArgument {
71 private final @NonNull Object substatements;
73 protected WithSubstatements(final QName argument,
74 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
76 this.substatements = maskList(substatements);
80 public final Collection<? extends DeclaredStatement<?>> declaredSubstatements() {
81 return unmaskList(substatements);
85 private final QName argument;
87 protected WithQNameArgument(final QName argument) {
88 this.argument = requireNonNull(argument);
92 public final @NonNull QName argument() {
97 public final String rawArgument() {
98 return argument.getLocalName();
102 public abstract static class WithRawStringArgument extends WithRawArgument<String> {
103 public abstract static class WithSubstatements extends WithRawStringArgument {
104 private final @NonNull Object substatements;
106 protected WithSubstatements(final StmtContext<String, ?, ?> context,
107 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
109 this.substatements = maskList(substatements);
113 public final Collection<? extends DeclaredStatement<?>> declaredSubstatements() {
114 return unmaskList(substatements);
118 protected WithRawStringArgument(final StmtContext<String, ?, ?> context) {
123 public final String argument() {
124 return rawArgument();
128 public abstract static class WithArgument<A> extends WithRawArgument<A> {
129 public abstract static class WithSubstatements<A> extends WithArgument<A> {
130 private final @NonNull Object substatements;
132 protected WithSubstatements(final StmtContext<A, ?, ?> context,
133 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
135 this.substatements = maskList(substatements);
139 public final Collection<? extends DeclaredStatement<?>> declaredSubstatements() {
140 return unmaskList(substatements);
144 private final A argument;
146 protected WithArgument(final StmtContext<A, ?, ?> context) {
148 argument = context.getStatementArgument();
152 public final A argument() {
157 public abstract static class ArgumentToString<A> extends AbstractDeclaredStatement<A> {
158 public abstract static class WithSubstatements<A> extends ArgumentToString<A> {
159 private final @NonNull Object substatements;
161 protected WithSubstatements(final A argument,
162 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
164 this.substatements = maskList(substatements);
168 public final Collection<? extends DeclaredStatement<?>> declaredSubstatements() {
169 return unmaskList(substatements);
173 private final @NonNull A argument;
175 protected ArgumentToString(final A argument) {
176 this.argument = requireNonNull(argument);
180 public final @NonNull A argument() {
185 public final String rawArgument() {
186 return argument.toString();