2 * Copyright (c) 2016 Cisco Systems, Inc. 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.nb.rfc8040.jersey.providers.patch;
10 import com.google.common.collect.ImmutableList;
11 import java.io.IOException;
12 import java.io.InputStream;
13 import java.net.URISyntaxException;
14 import java.util.ArrayList;
15 import java.util.List;
16 import java.util.Locale;
17 import javax.ws.rs.Consumes;
18 import javax.ws.rs.WebApplicationException;
19 import javax.ws.rs.ext.Provider;
20 import javax.xml.stream.XMLStreamException;
21 import javax.xml.transform.dom.DOMSource;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.mdsal.dom.api.DOMMountPointService;
24 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
25 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
26 import org.opendaylight.restconf.common.patch.PatchContext;
27 import org.opendaylight.restconf.common.patch.PatchEditOperation;
28 import org.opendaylight.restconf.common.patch.PatchEntity;
29 import org.opendaylight.restconf.nb.rfc8040.MediaTypes;
30 import org.opendaylight.restconf.nb.rfc8040.databind.DatabindProvider;
31 import org.opendaylight.restconf.nb.rfc8040.utils.parser.ParserIdentifier;
32 import org.opendaylight.yangtools.util.xml.UntrustedXML;
33 import org.opendaylight.yangtools.yang.common.ErrorTag;
34 import org.opendaylight.yangtools.yang.common.ErrorType;
35 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
36 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
37 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
38 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
39 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
40 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
41 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextTree;
42 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
43 import org.slf4j.Logger;
44 import org.slf4j.LoggerFactory;
45 import org.w3c.dom.Document;
46 import org.w3c.dom.Element;
47 import org.w3c.dom.Node;
48 import org.w3c.dom.NodeList;
49 import org.xml.sax.SAXException;
52 @Consumes(MediaTypes.APPLICATION_YANG_PATCH_XML)
53 public class XmlPatchBodyReader extends AbstractPatchBodyReader {
54 private static final Logger LOG = LoggerFactory.getLogger(XmlPatchBodyReader.class);
56 public XmlPatchBodyReader(final DatabindProvider databindProvider,
57 final DOMMountPointService mountPointService) {
58 super(databindProvider, mountPointService);
61 @SuppressWarnings("checkstyle:IllegalCatch")
63 protected PatchContext readBody(final InstanceIdentifierContext path, final InputStream entityStream)
64 throws WebApplicationException {
66 final Document doc = UntrustedXML.newDocumentBuilder().parse(entityStream);
67 return parse(path, doc);
68 } catch (final RestconfDocumentedException e) {
70 } catch (final Exception e) {
71 LOG.debug("Error parsing xml input", e);
73 throw new RestconfDocumentedException("Error parsing input: " + e.getMessage(), ErrorType.PROTOCOL,
74 ErrorTag.MALFORMED_MESSAGE, e);
78 private static PatchContext parse(final InstanceIdentifierContext pathContext, final Document doc)
79 throws XMLStreamException, IOException, SAXException, URISyntaxException {
80 final List<PatchEntity> resultCollection = new ArrayList<>();
81 final String patchId = doc.getElementsByTagName("patch-id").item(0).getFirstChild().getNodeValue();
82 final NodeList editNodes = doc.getElementsByTagName("edit");
84 for (int i = 0; i < editNodes.getLength(); i++) {
85 final Element element = (Element) editNodes.item(i);
86 final String operation = element.getElementsByTagName("operation").item(0).getFirstChild().getNodeValue();
87 final PatchEditOperation oper = PatchEditOperation.valueOf(operation.toUpperCase(Locale.ROOT));
88 final String editId = element.getElementsByTagName("edit-id").item(0).getFirstChild().getNodeValue();
89 final String target = element.getElementsByTagName("target").item(0).getFirstChild().getNodeValue();
90 final List<Element> values = readValueNodes(element, oper);
91 final Element firstValueElement = values != null ? values.get(0) : null;
93 // find complete path to target, it can be also empty (only slash)
94 final YangInstanceIdentifier targetII;
95 final Inference inference;
96 if (target.equals("/")) {
97 targetII = pathContext.getInstanceIdentifier();
98 inference = pathContext.inference();
100 // interpret as simple context
101 targetII = ParserIdentifier.parserPatchTarget(pathContext, target);
104 final var lookup = DataSchemaContextTree.from(pathContext.getSchemaContext())
105 .enterPath(targetII).orElseThrow();
107 final var stack = lookup.stack();
108 inference = stack.toInference();
109 if (!stack.isEmpty()) {
114 if (oper.isWithValue()) {
115 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
116 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
117 final XmlParserStream xmlParser = XmlParserStream.create(writer, inference);
118 xmlParser.traverse(new DOMSource(firstValueElement));
120 // for lists allow to manipulate with list items through their parent
121 if (targetII.getLastPathArgument() instanceof NodeIdentifierWithPredicates) {
122 resultCollection.add(new PatchEntity(editId, oper, targetII.getParent(), resultHolder.getResult()));
124 resultCollection.add(new PatchEntity(editId, oper, targetII, resultHolder.getResult()));
127 resultCollection.add(new PatchEntity(editId, oper, targetII));
131 return new PatchContext(pathContext, ImmutableList.copyOf(resultCollection), patchId);
137 * @param element Element of current edit operation
138 * @param operation Name of current operation
139 * @return List of value elements
141 private static List<Element> readValueNodes(final @NonNull Element element,
142 final @NonNull PatchEditOperation operation) {
143 final Node valueNode = element.getElementsByTagName("value").item(0);
145 if (operation.isWithValue() && valueNode == null) {
146 throw new RestconfDocumentedException("Error parsing input",
147 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
150 if (!operation.isWithValue() && valueNode != null) {
151 throw new RestconfDocumentedException("Error parsing input",
152 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
155 if (valueNode == null) {
159 final List<Element> result = new ArrayList<>();
160 final NodeList childNodes = valueNode.getChildNodes();
161 for (int i = 0; i < childNodes.getLength(); i++) {
162 if (childNodes.item(i) instanceof Element) {
163 result.add((Element) childNodes.item(i));