2 * Copyright (c) 2019 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.data.impl.schema;
10 import static com.google.common.base.Preconditions.checkState;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.annotations.Beta;
14 import com.google.common.collect.ClassToInstanceMap;
15 import com.google.common.collect.ImmutableClassToInstanceMap;
16 import com.google.common.collect.ImmutableMap;
17 import java.io.IOException;
18 import java.util.ArrayDeque;
19 import java.util.Deque;
20 import org.eclipse.jdt.annotation.NonNull;
21 import org.opendaylight.yangtools.rfc7952.data.util.ImmutableNormalizedMetadata;
22 import org.opendaylight.yangtools.rfc7952.data.util.ImmutableNormalizedMetadata.Builder;
23 import org.opendaylight.yangtools.yang.common.QName;
24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
25 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedMetadata;
26 import org.opendaylight.yangtools.yang.data.api.schema.builder.NormalizedNodeBuilder;
27 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriterExtension;
28 import org.opendaylight.yangtools.yang.data.api.schema.stream.StreamWriterMetadataExtension;
31 * A {@link NormalizedMetadata}-aware {@link ImmutableMetadataNormalizedNodeStreamWriter}. It advertizes the
32 * {@link StreamWriterMetadataExtension} extension.
35 public class ImmutableMetadataNormalizedNodeStreamWriter extends ImmutableNormalizedNodeStreamWriter
36 implements StreamWriterMetadataExtension {
38 * Snapshot of currently-open data- and metadatastate.
40 public static final class State {
41 final Builder metaBuilder;
42 final NormalizedNodeBuilder dataBuilder;
44 State(final NormalizedNodeBuilder dataBuilder, final Builder metadataBuilder) {
45 this.dataBuilder = requireNonNull(dataBuilder);
46 this.metaBuilder = requireNonNull(metadataBuilder);
49 public NormalizedNodeBuilder getDataBuilder() {
53 public Builder getMetaBuilder() {
58 private final Deque<Builder> builders = new ArrayDeque<>();
59 private final NormalizedNodeMetadataResult result;
61 protected ImmutableMetadataNormalizedNodeStreamWriter(final State state) {
62 super(state.getDataBuilder());
63 builders.push(state.getMetaBuilder());
67 protected ImmutableMetadataNormalizedNodeStreamWriter(final NormalizedNodeMetadataResult result) {
69 this.result = requireNonNull(result);
73 public final ClassToInstanceMap<NormalizedNodeStreamWriterExtension> getExtensions() {
74 return ImmutableClassToInstanceMap.of(StreamWriterMetadataExtension.class, this);
78 public final void metadata(final ImmutableMap<QName, Object> metadata) throws IOException {
79 final Builder current = builders.peek();
80 checkState(current != null, "Attempted to emit metadata when no metadata is open");
81 current.withAnnotations(metadata);
85 * Remove the currently-open builders for data and metadata from the stack.
87 * @return Builder state.
89 protected final @NonNull State popState() {
90 return new State(popBuilder(), builders.pop());
94 @SuppressWarnings("rawtypes")
95 final void enter(final PathArgument identifier, final NormalizedNodeBuilder next) {
96 super.enter(identifier, next);
97 builders.push(ImmutableNormalizedMetadata.builder().withIdentifier(identifier));
101 public final void endNode() {
103 final ImmutableNormalizedMetadata metadata = builders.pop().build();
104 final Builder current = builders.peek();
105 if (current != null) {
106 if (!metadata.getAnnotations().isEmpty() || !metadata.getChildren().isEmpty()) {
107 current.withChild(metadata);
111 result.setResult(metadata);