2 * Copyright (c) 2015 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
9 package org.opendaylight.netconf.sal.rest.impl;
11 import com.google.common.base.Splitter;
12 import com.google.common.collect.ImmutableList;
13 import java.io.IOException;
14 import java.io.InputStream;
15 import java.lang.annotation.Annotation;
16 import java.lang.reflect.Type;
18 import java.net.URISyntaxException;
19 import java.util.ArrayList;
20 import java.util.Iterator;
21 import java.util.List;
22 import javax.annotation.Nonnull;
23 import javax.ws.rs.Consumes;
24 import javax.ws.rs.WebApplicationException;
25 import javax.ws.rs.core.MediaType;
26 import javax.ws.rs.core.MultivaluedMap;
27 import javax.ws.rs.ext.MessageBodyReader;
28 import javax.ws.rs.ext.Provider;
29 import javax.xml.parsers.ParserConfigurationException;
30 import javax.xml.stream.XMLStreamException;
31 import javax.xml.transform.dom.DOMSource;
32 import org.opendaylight.netconf.sal.rest.api.Draft02;
33 import org.opendaylight.netconf.sal.rest.api.RestconfService;
34 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
35 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
36 import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
37 import org.opendaylight.restconf.common.errors.RestconfError.ErrorType;
38 import org.opendaylight.restconf.common.patch.PatchContext;
39 import org.opendaylight.restconf.common.patch.PatchEditOperation;
40 import org.opendaylight.restconf.common.patch.PatchEntity;
41 import org.opendaylight.yangtools.util.xml.UntrustedXML;
42 import org.opendaylight.yangtools.yang.common.QName;
43 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
45 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
46 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
47 import org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream;
48 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
49 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
50 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
51 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
52 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
53 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
54 import org.opendaylight.yangtools.yang.model.api.Module;
55 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
56 import org.opendaylight.yangtools.yang.model.util.SchemaContextUtil;
57 import org.slf4j.Logger;
58 import org.slf4j.LoggerFactory;
59 import org.w3c.dom.Document;
60 import org.w3c.dom.Element;
61 import org.w3c.dom.Node;
62 import org.w3c.dom.NodeList;
63 import org.xml.sax.SAXException;
66 * Yang PATCH Reader for XML.
68 * @deprecated This class will be replaced by XmlToPatchBodyReader from restconf-nb-rfc8040
72 @Consumes({Draft02.MediaTypes.PATCH + RestconfService.XML})
73 public class XmlToPatchBodyReader extends AbstractIdentifierAwareJaxRsProvider implements
74 MessageBodyReader<PatchContext> {
76 private static final Logger LOG = LoggerFactory.getLogger(XmlToPatchBodyReader.class);
79 public boolean isReadable(final Class<?> type, final Type genericType,
80 final Annotation[] annotations, final MediaType mediaType) {
84 @SuppressWarnings("checkstyle:IllegalCatch")
86 public PatchContext readFrom(final Class<PatchContext> type, final Type genericType,
87 final Annotation[] annotations, final MediaType mediaType,
88 final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream)
89 throws IOException, WebApplicationException {
92 final InstanceIdentifierContext<?> path = getInstanceIdentifierContext();
94 if (entityStream.available() < 1) {
95 // represent empty nopayload input
96 return new PatchContext(path, null, null);
99 final Document doc = UntrustedXML.newDocumentBuilder().parse(entityStream);
100 return parse(path, doc);
101 } catch (final RestconfDocumentedException e) {
103 } catch (final Exception e) {
104 LOG.debug("Error parsing xml input", e);
106 throw new RestconfDocumentedException("Error parsing input: " + e.getMessage(), ErrorType.PROTOCOL,
107 ErrorTag.MALFORMED_MESSAGE);
111 private static PatchContext parse(final InstanceIdentifierContext<?> pathContext, final Document doc)
112 throws XMLStreamException, IOException, ParserConfigurationException, SAXException, URISyntaxException {
113 final List<PatchEntity> resultCollection = new ArrayList<>();
114 final String patchId = doc.getElementsByTagName("patch-id").item(0).getFirstChild().getNodeValue();
115 final NodeList editNodes = doc.getElementsByTagName("edit");
117 for (int i = 0; i < editNodes.getLength(); i++) {
118 DataSchemaNode schemaNode = (DataSchemaNode) pathContext.getSchemaNode();
119 final Element element = (Element) editNodes.item(i);
120 final String operation = element.getElementsByTagName("operation").item(0).getFirstChild().getNodeValue();
121 final PatchEditOperation oper = PatchEditOperation.valueOf(operation.toUpperCase());
123 final String editId = element.getElementsByTagName("edit-id").item(0).getFirstChild().getNodeValue();
124 final String target = element.getElementsByTagName("target").item(0).getFirstChild().getNodeValue();
125 final List<Element> values = readValueNodes(element, oper);
126 final Element firstValueElement = values != null ? values.get(0) : null;
128 // get namespace according to schema node from path context or value
129 final String namespace = firstValueElement == null
130 ? schemaNode.getQName().getNamespace().toString() : firstValueElement.getNamespaceURI();
132 // find module according to namespace
133 final Module module = pathContext.getSchemaContext().findModuleByNamespace(
134 URI.create(namespace)).iterator().next();
136 // initialize codec + set default prefix derived from module name
137 final StringModuleInstanceIdentifierCodec codec = new StringModuleInstanceIdentifierCodec(
138 pathContext.getSchemaContext(), module.getName());
140 // find complete path to target and target schema node
141 // target can be also empty (only slash)
142 YangInstanceIdentifier targetII;
143 final SchemaNode targetNode;
144 if (target.equals("/")) {
145 targetII = pathContext.getInstanceIdentifier();
146 targetNode = pathContext.getSchemaContext();
148 targetII = codec.deserialize(codec.serialize(pathContext.getInstanceIdentifier())
149 .concat(prepareNonCondXpath(schemaNode, target.replaceFirst("/", ""), firstValueElement,
150 namespace, module.getQNameModule().getFormattedRevision())));
152 targetNode = SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
153 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath().getParent());
156 schemaNode = (DataSchemaNode) SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
157 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath());
160 if (targetNode == null) {
161 LOG.debug("Target node {} not found in path {} ", target, pathContext.getSchemaNode());
162 throw new RestconfDocumentedException("Error parsing input", ErrorType.PROTOCOL,
163 ErrorTag.MALFORMED_MESSAGE);
166 if (oper.isWithValue()) {
167 final NormalizedNode<?, ?> parsed;
168 if (schemaNode instanceof ContainerSchemaNode || schemaNode instanceof ListSchemaNode) {
169 final NormalizedNodeResult resultHolder = new NormalizedNodeResult();
170 final NormalizedNodeStreamWriter writer = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
171 final XmlParserStream xmlParser = XmlParserStream.create(writer, pathContext.getSchemaContext(),
173 xmlParser.traverse(new DOMSource(firstValueElement));
174 parsed = resultHolder.getResult();
179 // for lists allow to manipulate with list items through their parent
180 if (targetII.getLastPathArgument() instanceof NodeIdentifierWithPredicates) {
181 targetII = targetII.getParent();
184 resultCollection.add(new PatchEntity(editId, oper, targetII, parsed));
186 resultCollection.add(new PatchEntity(editId, oper, targetII));
190 return new PatchContext(pathContext, ImmutableList.copyOf(resultCollection), patchId);
196 * @param element Element of current edit operation
197 * @param operation Name of current operation
198 * @return List of value elements
200 private static List<Element> readValueNodes(@Nonnull final Element element,
201 @Nonnull final PatchEditOperation operation) {
202 final Node valueNode = element.getElementsByTagName("value").item(0);
204 if (operation.isWithValue() && valueNode == null) {
205 throw new RestconfDocumentedException("Error parsing input",
206 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
209 if (!operation.isWithValue() && valueNode != null) {
210 throw new RestconfDocumentedException("Error parsing input",
211 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
214 if (valueNode == null) {
218 final List<Element> result = new ArrayList<>();
219 final NodeList childNodes = valueNode.getChildNodes();
220 for (int i = 0; i < childNodes.getLength(); i++) {
221 if (childNodes.item(i) instanceof Element) {
222 result.add((Element) childNodes.item(i));
230 * Prepare non-conditional XPath suitable for deserialization with {@link StringModuleInstanceIdentifierCodec}.
232 * @param schemaNode Top schema node
233 * @param target Edit operation target
234 * @param value Element with value
235 * @param namespace Module namespace
236 * @param revision Module revision
237 * @return Non-conditional XPath
239 private static String prepareNonCondXpath(@Nonnull final DataSchemaNode schemaNode, @Nonnull final String target,
240 @Nonnull final Element value, @Nonnull final String namespace, @Nonnull final String revision) {
241 final Iterator<String> args = Splitter.on("/").split(target.substring(target.indexOf(':') + 1)).iterator();
243 final StringBuilder nonCondXpath = new StringBuilder();
244 SchemaNode childNode = schemaNode;
246 while (args.hasNext()) {
247 final String s = args.next();
248 nonCondXpath.append("/");
249 nonCondXpath.append(s);
250 childNode = ((DataNodeContainer) childNode).getDataChildByName(QName.create(namespace, revision, s));
252 if (childNode instanceof ListSchemaNode && args.hasNext()) {
253 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), args);
257 if (childNode instanceof ListSchemaNode && value != null) {
258 final Iterator<String> keyValues = readKeyValues(value,
259 ((ListSchemaNode) childNode).getKeyDefinition().iterator());
260 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), keyValues);
263 return nonCondXpath.toString();
267 * Read value for every list key.
269 * @param value Value element
270 * @param keys Iterator of list keys names
271 * @return Iterator of list keys values
273 private static Iterator<String> readKeyValues(@Nonnull final Element value, @Nonnull final Iterator<QName> keys) {
274 final List<String> result = new ArrayList<>();
276 while (keys.hasNext()) {
277 result.add(value.getElementsByTagName(keys.next().getLocalName()).item(0).getFirstChild().getNodeValue());
280 return result.iterator();
284 * Append key name - key value pairs for every list key to {@code nonCondXpath}.
286 * @param nonCondXpath Builder for creating non-conditional XPath
287 * @param keyNames Iterator of list keys names
288 * @param keyValues Iterator of list keys values
290 private static void appendKeys(@Nonnull final StringBuilder nonCondXpath, @Nonnull final Iterator<QName> keyNames,
291 @Nonnull final Iterator<String> keyValues) {
292 while (keyNames.hasNext()) {
293 nonCondXpath.append("[");
294 nonCondXpath.append(keyNames.next().getLocalName());
295 nonCondXpath.append("=");
296 nonCondXpath.append("'");
297 nonCondXpath.append(keyValues.next());
298 nonCondXpath.append("'");
299 nonCondXpath.append("]");