2 * Copyright (c) 2023 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.restconf.openapi.impl;
10 import com.fasterxml.jackson.core.JsonGenerator;
11 import java.io.BufferedReader;
12 import java.io.ByteArrayInputStream;
13 import java.io.ByteArrayOutputStream;
14 import java.io.IOException;
15 import java.io.InputStream;
16 import java.io.InputStreamReader;
17 import java.io.Reader;
18 import java.nio.charset.StandardCharsets;
19 import java.util.ArrayDeque;
20 import java.util.ArrayList;
21 import java.util.Deque;
22 import java.util.Iterator;
23 import java.util.List;
24 import org.opendaylight.restconf.openapi.jaxrs.OpenApiBodyWriter;
25 import org.opendaylight.restconf.openapi.model.SchemaEntity;
26 import org.opendaylight.yangtools.yang.model.api.ActionNodeContainer;
27 import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
28 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
29 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
30 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
31 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
32 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
33 import org.opendaylight.yangtools.yang.model.api.Module;
34 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
36 public final class SchemasStream extends InputStream {
37 private static final String OBJECT_TYPE = "object";
38 private static final String INPUT_SUFFIX = "_input";
39 private static final String OUTPUT_SUFFIX = "_output";
41 private final Iterator<? extends Module> iterator;
42 private final OpenApiBodyWriter writer;
43 private final EffectiveModelContext context;
44 private final JsonGenerator generator;
45 private final ByteArrayOutputStream stream;
46 private final boolean isForSingleModule;
48 private Reader reader;
49 private boolean schemesWritten;
51 public SchemasStream(final EffectiveModelContext context, final OpenApiBodyWriter writer,
52 final JsonGenerator generator, final ByteArrayOutputStream stream,
53 final Iterator<? extends Module> iterator, final boolean isForSingleModule) {
54 this.iterator = iterator;
55 this.context = context;
57 this.generator = generator;
59 this.isForSingleModule = isForSingleModule;
63 public int read() throws IOException {
65 generator.writeObjectFieldStart("schemas");
67 reader = new BufferedReader(
68 new InputStreamReader(new ByteArrayInputStream(stream.toByteArray()), StandardCharsets.UTF_8));
72 var read = reader.read();
74 if (iterator.hasNext()) {
75 reader = new BufferedReader(
76 new InputStreamReader(new SchemaStream(toComponents(iterator.next(), context, isForSingleModule),
77 writer), StandardCharsets.UTF_8));
81 if (!schemesWritten) {
82 generator.writeEndObject();
83 schemesWritten = true;
87 reader = new BufferedReader(
88 new InputStreamReader(new ByteArrayInputStream(stream.toByteArray()), StandardCharsets.UTF_8));
97 public int read(final byte[] array, final int off, final int len) throws IOException {
98 return super.read(array, off, len);
101 private static Deque<SchemaEntity> toComponents(final Module module, final EffectiveModelContext context,
102 final boolean isForSingleModule) {
103 final var result = new ArrayDeque<SchemaEntity>();
104 final var definitionNames = new DefinitionNames();
105 final var stack = SchemaInferenceStack.of(context);
106 final var moduleName = module.getName();
107 if (isForSingleModule) {
108 definitionNames.addUnlinkedName(moduleName + "_module");
110 final var children = new ArrayList<DataSchemaNode>();
111 for (final var rpc : module.getRpcs()) {
112 stack.enterSchemaTree(rpc.getQName());
113 final var rpcName = rpc.getQName().getLocalName();
114 final var rpcInput = rpc.getInput();
115 if (!rpcInput.getChildNodes().isEmpty()) {
116 final var input = new SchemaEntity(rpcInput, moduleName + "_" + rpcName + INPUT_SUFFIX, null,
117 OBJECT_TYPE, stack, moduleName, false, definitionNames, EntityType.RPC);
119 stack.enterSchemaTree(rpcInput.getQName());
120 for (final var child : rpcInput.getChildNodes()) {
121 if (!children.contains(child)) {
123 processDataAndActionNodes(child, moduleName, stack, definitionNames, result, moduleName, false);
128 final var rpcOutput = rpc.getOutput();
129 if (!rpcOutput.getChildNodes().isEmpty()) {
130 final var output = new SchemaEntity(rpcOutput, moduleName + "_" + rpcName + OUTPUT_SUFFIX, null,
131 OBJECT_TYPE, stack, moduleName, false, definitionNames, EntityType.RPC);
133 stack.enterSchemaTree(rpcOutput.getQName());
134 for (final var child : rpcOutput.getChildNodes()) {
135 if (!children.contains(child)) {
137 processDataAndActionNodes(child, moduleName, stack, definitionNames, result, moduleName, false);
145 for (final var childNode : module.getChildNodes()) {
146 processDataAndActionNodes(childNode, moduleName, stack, definitionNames, result, moduleName,
152 private static void processDataAndActionNodes(final DataSchemaNode node, final String title,
153 final SchemaInferenceStack stack, final DefinitionNames definitionNames,
154 final ArrayDeque<SchemaEntity> result, final String parentName, final boolean isParentConfig) {
155 if (node instanceof ContainerSchemaNode || node instanceof ListSchemaNode) {
156 final var newTitle = title + "_" + node.getQName().getLocalName();
157 final String discriminator;
158 if (!definitionNames.isListedNode(node)) {
159 final var parentNameConfigLocalName = parentName + "_" + node.getQName().getLocalName();
160 final var names = List.of(parentNameConfigLocalName);
161 discriminator = definitionNames.pickDiscriminator(node, names);
163 discriminator = definitionNames.getDiscriminator(node);
165 final var child = new SchemaEntity(node, newTitle, discriminator, OBJECT_TYPE, stack, parentName,
166 isParentConfig, definitionNames, EntityType.NODE);
167 final var isConfig = node.isConfiguration() && isParentConfig;
169 stack.enterSchemaTree(node.getQName());
170 processActions(node, title, stack, definitionNames, result, parentName);
171 for (final var childNode : ((DataNodeContainer) node).getChildNodes()) {
172 processDataAndActionNodes(childNode, newTitle, stack, definitionNames, result, newTitle, isConfig);
175 } else if (node instanceof ChoiceSchemaNode choiceNode && !choiceNode.getCases().isEmpty()) {
176 // Process default case or first case
177 final var caseNode = choiceNode.getDefaultCase()
178 .orElseGet(() -> choiceNode.getCases().stream().findFirst()
179 .orElseThrow(() -> new IllegalStateException("No cases found in ChoiceSchemaNode")));
180 stack.enterSchemaTree(choiceNode.getQName());
181 stack.enterSchemaTree(caseNode.getQName());
182 for (final var childNode : caseNode.getChildNodes()) {
183 processDataAndActionNodes(childNode, title, stack, definitionNames, result, parentName, isParentConfig);
185 stack.exit(); // Exit the CaseSchemaNode context
186 stack.exit(); // Exit the ChoiceSchemaNode context
190 private static void processActions(final DataSchemaNode node, final String title, final SchemaInferenceStack stack,
191 final DefinitionNames definitionNames, final ArrayDeque<SchemaEntity> result, final String parentName) {
192 for (final var actionDef : ((ActionNodeContainer) node).getActions()) {
193 stack.enterSchemaTree(actionDef.getQName());
194 final var actionName = actionDef.getQName().getLocalName();
195 final var actionInput = actionDef.getInput();
196 if (!actionInput.getChildNodes().isEmpty()) {
197 final var input = new SchemaEntity(actionInput, title + "_" + actionName + INPUT_SUFFIX, null,
198 OBJECT_TYPE, stack, parentName, false, definitionNames, EntityType.RPC);
201 final var actionOutput = actionDef.getOutput();
202 if (!actionOutput.getChildNodes().isEmpty()) {
203 final var output = new SchemaEntity(actionOutput, title + "_" + actionName + OUTPUT_SUFFIX, null,
204 OBJECT_TYPE, stack, parentName, false, definitionNames, EntityType.RPC);
211 public enum EntityType {