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 static com.google.common.base.Verify.verify;
11 import static com.google.common.base.Verify.verifyNotNull;
13 import com.google.common.base.Splitter;
14 import com.google.common.collect.ImmutableList;
15 import java.io.IOException;
16 import java.io.InputStream;
17 import java.net.URISyntaxException;
18 import java.util.ArrayList;
19 import java.util.Iterator;
20 import java.util.List;
21 import java.util.Locale;
22 import javax.ws.rs.Consumes;
23 import javax.ws.rs.WebApplicationException;
24 import javax.ws.rs.ext.Provider;
25 import javax.xml.parsers.ParserConfigurationException;
26 import javax.xml.stream.XMLStreamException;
27 import javax.xml.transform.dom.DOMSource;
28 import org.eclipse.jdt.annotation.NonNull;
29 import org.opendaylight.mdsal.dom.api.DOMMountPointService;
30 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
31 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
32 import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
33 import org.opendaylight.restconf.common.errors.RestconfError.ErrorType;
34 import org.opendaylight.restconf.common.patch.PatchContext;
35 import org.opendaylight.restconf.common.patch.PatchEditOperation;
36 import org.opendaylight.restconf.common.patch.PatchEntity;
37 import org.opendaylight.restconf.nb.rfc8040.MediaTypes;
38 import org.opendaylight.restconf.nb.rfc8040.codecs.StringModuleInstanceIdentifierCodec;
39 import org.opendaylight.restconf.nb.rfc8040.handlers.SchemaContextHandler;
40 import org.opendaylight.yangtools.util.xml.UntrustedXML;
41 import org.opendaylight.yangtools.yang.common.QName;
42 import org.opendaylight.yangtools.yang.common.Revision;
43 import org.opendaylight.yangtools.yang.common.XMLNamespace;
44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
45 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
46 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
47 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
48 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
49 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
50 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
51 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
52 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
53 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
54 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
55 import org.opendaylight.yangtools.yang.model.api.Module;
56 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
57 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
58 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
59 import org.slf4j.Logger;
60 import org.slf4j.LoggerFactory;
61 import org.w3c.dom.Document;
62 import org.w3c.dom.Element;
63 import org.w3c.dom.Node;
64 import org.w3c.dom.NodeList;
65 import org.xml.sax.SAXException;
68 @Consumes(MediaTypes.APPLICATION_YANG_PATCH_XML)
69 public class XmlToPatchBodyReader extends AbstractToPatchBodyReader {
70 private static final Logger LOG = LoggerFactory.getLogger(XmlToPatchBodyReader.class);
71 private static final Splitter SLASH_SPLITTER = Splitter.on('/');
73 public XmlToPatchBodyReader(final SchemaContextHandler schemaContextHandler,
74 final DOMMountPointService mountPointService) {
75 super(schemaContextHandler, mountPointService);
78 @SuppressWarnings("checkstyle:IllegalCatch")
80 protected PatchContext readBody(final InstanceIdentifierContext<?> path, final InputStream entityStream)
81 throws WebApplicationException {
83 final Document doc = UntrustedXML.newDocumentBuilder().parse(entityStream);
84 return parse(path, doc);
85 } catch (final RestconfDocumentedException e) {
87 } catch (final Exception e) {
88 LOG.debug("Error parsing xml input", e);
90 throw new RestconfDocumentedException("Error parsing input: " + e.getMessage(), ErrorType.PROTOCOL,
91 ErrorTag.MALFORMED_MESSAGE, e);
95 private static PatchContext parse(final InstanceIdentifierContext<?> pathContext, final Document doc)
96 throws XMLStreamException, IOException, ParserConfigurationException, SAXException, URISyntaxException {
97 final List<PatchEntity> resultCollection = new ArrayList<>();
98 final String patchId = doc.getElementsByTagName("patch-id").item(0).getFirstChild().getNodeValue();
99 final NodeList editNodes = doc.getElementsByTagName("edit");
101 for (int i = 0; i < editNodes.getLength(); i++) {
102 DataSchemaNode schemaNode = (DataSchemaNode) pathContext.getSchemaNode();
103 final Element element = (Element) editNodes.item(i);
104 final String operation = element.getElementsByTagName("operation").item(0).getFirstChild().getNodeValue();
105 final PatchEditOperation oper = PatchEditOperation.valueOf(operation.toUpperCase(Locale.ROOT));
106 final String editId = element.getElementsByTagName("edit-id").item(0).getFirstChild().getNodeValue();
107 final String target = element.getElementsByTagName("target").item(0).getFirstChild().getNodeValue();
108 final List<Element> values = readValueNodes(element, oper);
109 final Element firstValueElement = values != null ? values.get(0) : null;
111 // get namespace according to schema node from path context or value
112 final String namespace = firstValueElement == null
113 ? schemaNode.getQName().getNamespace().toString() : firstValueElement.getNamespaceURI();
115 // find module according to namespace
116 final Module module = pathContext.getSchemaContext().findModules(XMLNamespace.of(namespace)).iterator()
119 // initialize codec + set default prefix derived from module name
120 final StringModuleInstanceIdentifierCodec codec = new StringModuleInstanceIdentifierCodec(
121 pathContext.getSchemaContext(), module.getName());
123 // find complete path to target and target schema node
124 // target can be also empty (only slash)
125 YangInstanceIdentifier targetII;
126 final SchemaNode targetNode;
127 if (target.equals("/")) {
128 targetII = pathContext.getInstanceIdentifier();
129 targetNode = pathContext.getSchemaContext();
131 targetII = codec.deserialize(codec.serialize(pathContext.getInstanceIdentifier())
132 .concat(prepareNonCondXpath(schemaNode, target.replaceFirst("/", ""), firstValueElement,
134 module.getQNameModule().getRevision().map(Revision::toString).orElse(null))));
137 schemaNode = verifyNotNull(codec.getDataContextTree().findChild(targetII).orElseThrow()
138 .getDataSchemaNode());
140 final EffectiveStatement<?, ?> parentStmt = SchemaInferenceStack.ofInstantiatedPath(
141 pathContext.getSchemaContext(), schemaNode.getPath().getParent()).currentStatement();
142 verify(parentStmt instanceof SchemaNode, "Unexpected parent %s", parentStmt);
143 targetNode = (SchemaNode) parentStmt;
146 if (targetNode == null) {
147 LOG.debug("Target node {} not found in path {} ", target, pathContext.getSchemaNode());
148 throw new RestconfDocumentedException("Error parsing input", ErrorType.PROTOCOL,
149 ErrorTag.MALFORMED_MESSAGE);
152 if (oper.isWithValue()) {
153 final NormalizedNode parsed;
154 if (schemaNode instanceof ContainerSchemaNode || schemaNode instanceof ListSchemaNode) {
155 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
156 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
157 final XmlParserStream xmlParser = XmlParserStream.create(writer,
158 SchemaInferenceStack.ofInstantiatedPath(pathContext.getSchemaContext(), schemaNode.getPath())
160 xmlParser.traverse(new DOMSource(firstValueElement));
161 parsed = resultHolder.getResult();
166 // for lists allow to manipulate with list items through their parent
167 if (targetII.getLastPathArgument() instanceof NodeIdentifierWithPredicates) {
168 targetII = targetII.getParent();
171 resultCollection.add(new PatchEntity(editId, oper, targetII, parsed));
173 resultCollection.add(new PatchEntity(editId, oper, targetII));
177 return new PatchContext(pathContext, ImmutableList.copyOf(resultCollection), patchId);
183 * @param element Element of current edit operation
184 * @param operation Name of current operation
185 * @return List of value elements
187 private static List<Element> readValueNodes(final @NonNull Element element,
188 final @NonNull PatchEditOperation operation) {
189 final Node valueNode = element.getElementsByTagName("value").item(0);
191 if (operation.isWithValue() && valueNode == null) {
192 throw new RestconfDocumentedException("Error parsing input",
193 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
196 if (!operation.isWithValue() && valueNode != null) {
197 throw new RestconfDocumentedException("Error parsing input",
198 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
201 if (valueNode == null) {
205 final List<Element> result = new ArrayList<>();
206 final NodeList childNodes = valueNode.getChildNodes();
207 for (int i = 0; i < childNodes.getLength(); i++) {
208 if (childNodes.item(i) instanceof Element) {
209 result.add((Element) childNodes.item(i));
217 * Prepare non-conditional XPath suitable for deserialization with {@link StringModuleInstanceIdentifierCodec}.
219 * @param schemaNode Top schema node
220 * @param target Edit operation target
221 * @param value Element with value
222 * @param namespace Module namespace
223 * @param revision Module revision
224 * @return Non-conditional XPath
226 private static String prepareNonCondXpath(final @NonNull DataSchemaNode schemaNode, final @NonNull String target,
227 final @NonNull Element value, final @NonNull String namespace, final @NonNull String revision) {
228 final Iterator<String> args = SLASH_SPLITTER.split(target.substring(target.indexOf(':') + 1)).iterator();
230 final StringBuilder nonCondXpath = new StringBuilder();
231 SchemaNode childNode = schemaNode;
233 while (args.hasNext()) {
234 final String s = args.next();
235 nonCondXpath.append("/");
236 nonCondXpath.append(s);
237 childNode = ((DataNodeContainer) childNode).getDataChildByName(QName.create(namespace, revision, s));
239 if (childNode instanceof ListSchemaNode && args.hasNext()) {
240 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), args);
244 if (childNode instanceof ListSchemaNode && value != null) {
245 final Iterator<String> keyValues = readKeyValues(value,
246 ((ListSchemaNode) childNode).getKeyDefinition().iterator());
247 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), keyValues);
250 return nonCondXpath.toString();
254 * Read value for every list key.
256 * @param value Value element
257 * @param keys Iterator of list keys names
258 * @return Iterator of list keys values
260 private static Iterator<String> readKeyValues(final @NonNull Element value, final @NonNull Iterator<QName> keys) {
261 final List<String> result = new ArrayList<>();
263 while (keys.hasNext()) {
264 result.add(value.getElementsByTagName(keys.next().getLocalName()).item(0).getFirstChild().getNodeValue());
267 return result.iterator();
271 * Append key name - key value pairs for every list key to {@code nonCondXpath}.
273 * @param nonCondXpath Builder for creating non-conditional XPath
274 * @param keyNames Iterator of list keys names
275 * @param keyValues Iterator of list keys values
277 private static void appendKeys(final @NonNull StringBuilder nonCondXpath, final @NonNull Iterator<QName> keyNames,
278 final @NonNull Iterator<String> keyValues) {
279 while (keyNames.hasNext()) {
280 nonCondXpath.append('[').append(keyNames.next().getLocalName()).append("='").append(keyValues.next())