2 * Copyright (c) 2024 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.server.spi;
10 import static com.google.common.base.Verify.verify;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.MoreObjects.ToStringHelper;
14 import java.io.IOException;
15 import java.io.OutputStream;
16 import javax.xml.stream.XMLStreamException;
17 import org.eclipse.jdt.annotation.NonNullByDefault;
18 import org.opendaylight.restconf.api.FormatParameters;
19 import org.opendaylight.restconf.api.FormattableBody;
20 import org.opendaylight.restconf.server.api.DatabindContext;
21 import org.opendaylight.restconf.server.api.DatabindFormattableBody;
22 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
23 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
25 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
26 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
27 import org.opendaylight.yangtools.yang.data.codec.gson.JSONNormalizedNodeStreamWriter;
28 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
29 import org.opendaylight.yangtools.yang.model.api.stmt.DataTreeEffectiveStatement;
30 import org.opendaylight.yangtools.yang.model.api.stmt.LeafListEffectiveStatement;
31 import org.opendaylight.yangtools.yang.model.api.stmt.ListEffectiveStatement;
32 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
35 * A {@link FormattableBody} representing a data resource.
38 public final class NormalizedFormattableBody<N extends NormalizedNode> extends DatabindFormattableBody {
39 private final Inference parent;
42 public NormalizedFormattableBody(final FormatParameters format, final DatabindContext databind,
43 final Inference parent, final N data) {
44 super(format, databind);
45 this.parent = requireNonNull(parent);
46 this.data = requireNonNull(data);
47 // RESTCONF allows returning one list item. We need to wrap it in map node in order to serialize it properly,
48 // which is where the notion of "parent Inference" may be confusing. We mean
49 // 'inference to the parent NormalizedNode', which for *EntryNode ends up the corresponding statement
50 if (data instanceof MapEntryNode) {
51 verifyParent(parent, ListEffectiveStatement.class, data);
52 } else if (data instanceof LeafSetEntryNode) {
53 verifyParent(parent, LeafListEffectiveStatement.class, data);
57 private static void verifyParent(final Inference inference,
58 final Class<? extends DataTreeEffectiveStatement<?>> expectedStmt, final NormalizedNode data) {
59 // Let's not bother with niceties of error report -- if we trip here, the caller is doing the wrong
60 final var qname = expectedStmt.cast(inference.toSchemaInferenceStack().currentStatement()).argument();
61 verify(qname.equals(data.name().getNodeType()));
65 protected void formatToJSON(final OutputStream out, final FormatParameters format, final DatabindContext databind)
67 writeTo(JSONNormalizedNodeStreamWriter.createExclusiveWriter(databind.jsonCodecs(), parent, null,
68 FormattableBodySupport.createJsonWriter(out, format)));
72 protected void formatToXML(final OutputStream out, final FormatParameters format, final DatabindContext databind)
74 final var xmlWriter = FormattableBodySupport.createXmlWriter(out, format);
75 writeTo(XMLStreamNormalizedNodeStreamWriter.create(xmlWriter, parent));
78 } catch (XMLStreamException e) {
79 throw new IOException("Failed to write data", e);
84 protected ToStringHelper addToStringAttributes(final ToStringHelper helper) {
85 return super.addToStringAttributes(helper.add("body", data.prettyTree()));
88 private void writeTo(final NormalizedNodeStreamWriter streamWriter) throws IOException {
89 try (var writer = NormalizedNodeWriter.forStreamWriter(streamWriter)) {