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.util.ArrayList;
19 import java.util.Iterator;
20 import java.util.List;
21 import javax.annotation.Nonnull;
22 import javax.ws.rs.Consumes;
23 import javax.ws.rs.WebApplicationException;
24 import javax.ws.rs.core.MediaType;
25 import javax.ws.rs.core.MultivaluedMap;
26 import javax.ws.rs.ext.MessageBodyReader;
27 import javax.ws.rs.ext.Provider;
28 import org.opendaylight.netconf.sal.rest.api.Draft02;
29 import org.opendaylight.netconf.sal.rest.api.RestconfService;
30 import org.opendaylight.netconf.sal.restconf.impl.InstanceIdentifierContext;
31 import org.opendaylight.netconf.sal.restconf.impl.PATCHContext;
32 import org.opendaylight.netconf.sal.restconf.impl.PATCHEditOperation;
33 import org.opendaylight.netconf.sal.restconf.impl.PATCHEntity;
34 import org.opendaylight.netconf.sal.restconf.impl.RestconfDocumentedException;
35 import org.opendaylight.netconf.sal.restconf.impl.RestconfError.ErrorTag;
36 import org.opendaylight.netconf.sal.restconf.impl.RestconfError.ErrorType;
37 import org.opendaylight.yangtools.util.xml.UntrustedXML;
38 import org.opendaylight.yangtools.yang.common.QName;
39 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
40 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
41 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
42 import org.opendaylight.yangtools.yang.data.impl.codec.xml.XmlUtils;
43 import org.opendaylight.yangtools.yang.data.impl.schema.transform.dom.parser.DomToNormalizedNodeParserFactory;
44 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
45 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
46 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
47 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
48 import org.opendaylight.yangtools.yang.model.api.Module;
49 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
50 import org.opendaylight.yangtools.yang.model.util.SchemaContextUtil;
51 import org.slf4j.Logger;
52 import org.slf4j.LoggerFactory;
53 import org.w3c.dom.Document;
54 import org.w3c.dom.Element;
55 import org.w3c.dom.Node;
56 import org.w3c.dom.NodeList;
59 * @deprecated This class will be replaced by
60 * {@link org.opendaylight.restconf.jersey.providers.XmlToPATCHBodyReader}
64 @Consumes({Draft02.MediaTypes.PATCH + RestconfService.XML})
65 public class XmlToPATCHBodyReader extends AbstractIdentifierAwareJaxRsProvider implements
66 MessageBodyReader<PATCHContext> {
68 private final static Logger LOG = LoggerFactory.getLogger(XmlToPATCHBodyReader.class);
71 public boolean isReadable(final Class<?> type, final Type genericType,
72 final Annotation[] annotations, final MediaType mediaType) {
77 public PATCHContext readFrom(final Class<PATCHContext> type, final Type genericType,
78 final Annotation[] annotations, final MediaType mediaType,
79 final MultivaluedMap<String, String> httpHeaders, final InputStream entityStream)
80 throws IOException, WebApplicationException {
83 final InstanceIdentifierContext<?> path = getInstanceIdentifierContext();
85 if (entityStream.available() < 1) {
86 // represent empty nopayload input
87 return new PATCHContext(path, null, null);
90 final Document doc = UntrustedXML.newDocumentBuilder().parse(entityStream);
91 return parse(path, doc);
92 } catch (final RestconfDocumentedException e) {
94 } catch (final Exception e) {
95 LOG.debug("Error parsing xml input", e);
97 throw new RestconfDocumentedException("Error parsing input: " + e.getMessage(), ErrorType.PROTOCOL,
98 ErrorTag.MALFORMED_MESSAGE);
102 private static PATCHContext parse(final InstanceIdentifierContext<?> pathContext, final Document doc) {
103 final List<PATCHEntity> resultCollection = new ArrayList<>();
104 final String patchId = doc.getElementsByTagName("patch-id").item(0).getFirstChild().getNodeValue();
105 final NodeList editNodes = doc.getElementsByTagName("edit");
106 final DomToNormalizedNodeParserFactory parserFactory =
107 DomToNormalizedNodeParserFactory.getInstance(XmlUtils.DEFAULT_XML_CODEC_PROVIDER,
108 pathContext.getSchemaContext());
110 for (int i = 0; i < editNodes.getLength(); i++) {
111 DataSchemaNode schemaNode = (DataSchemaNode) pathContext.getSchemaNode();
112 final Element element = (Element) editNodes.item(i);
113 final String operation = element.getElementsByTagName("operation").item(0).getFirstChild().getNodeValue();
114 final String editId = element.getElementsByTagName("edit-id").item(0).getFirstChild().getNodeValue();
115 final String target = element.getElementsByTagName("target").item(0).getFirstChild().getNodeValue();
116 final List<Element> values = readValueNodes(element, operation);
117 final Element firstValueElement = values != null ? values.get(0) : null;
119 // get namespace according to schema node from path context or value
120 final String namespace = (firstValueElement == null) ?
121 schemaNode.getQName().getNamespace().toString() : firstValueElement.getNamespaceURI();
123 // find module according to namespace
124 final Module module = pathContext.getSchemaContext().findModuleByNamespace(
125 URI.create(namespace)).iterator().next();
127 // initialize codec + set default prefix derived from module name
128 final StringModuleInstanceIdentifierCodec codec = new StringModuleInstanceIdentifierCodec(
129 pathContext.getSchemaContext(), module.getName());
131 // find complete path to target and target schema node
132 // target can be also empty (only slash)
133 YangInstanceIdentifier targetII;
134 final SchemaNode targetNode;
135 if (target.equals("/")) {
136 targetII = pathContext.getInstanceIdentifier();
137 targetNode = pathContext.getSchemaContext();
139 targetII = codec.deserialize(codec.serialize(pathContext.getInstanceIdentifier())
140 .concat(prepareNonCondXpath(schemaNode, target.replaceFirst("/", ""), firstValueElement,
141 namespace, module.getQNameModule().getFormattedRevision())));
143 targetNode = SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
144 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath().getParent());
147 schemaNode = (DataSchemaNode) SchemaContextUtil.findDataSchemaNode(pathContext.getSchemaContext(),
148 codec.getDataContextTree().getChild(targetII).getDataSchemaNode().getPath());
151 if (targetNode == null) {
152 LOG.debug("Target node {} not found in path {} ", target, pathContext.getSchemaNode());
153 throw new RestconfDocumentedException("Error parsing input", ErrorType.PROTOCOL,
154 ErrorTag.MALFORMED_MESSAGE);
156 if (PATCHEditOperation.isPatchOperationWithValue(operation)) {
157 NormalizedNode<?, ?> parsed = null;
158 if (schemaNode instanceof ContainerSchemaNode) {
159 parsed = parserFactory.getContainerNodeParser().parse(values, (ContainerSchemaNode) schemaNode);
160 } else if (schemaNode instanceof ListSchemaNode) {
161 parsed = parserFactory.getMapNodeParser().parse(values, (ListSchemaNode) schemaNode);
164 // for lists allow to manipulate with list items through their parent
165 if (targetII.getLastPathArgument() instanceof NodeIdentifierWithPredicates) {
166 targetII = targetII.getParent();
169 resultCollection.add(new PATCHEntity(editId, operation, targetII, parsed));
171 resultCollection.add(new PATCHEntity(editId, operation, targetII));
176 return new PATCHContext(pathContext, ImmutableList.copyOf(resultCollection), patchId);
181 * @param element Element of current edit operation
182 * @param operation Name of current operation
183 * @return List of value elements
185 private static List<Element> readValueNodes(@Nonnull final Element element, @Nonnull final String operation) {
186 final Node valueNode = element.getElementsByTagName("value").item(0);
188 if (PATCHEditOperation.isPatchOperationWithValue(operation) && (valueNode == null)) {
189 throw new RestconfDocumentedException("Error parsing input",
190 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
193 if (!PATCHEditOperation.isPatchOperationWithValue(operation) && (valueNode != null)) {
194 throw new RestconfDocumentedException("Error parsing input",
195 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
198 if (valueNode == null) {
202 final List<Element> result = new ArrayList<>();
203 final NodeList childNodes = valueNode.getChildNodes();
204 for (int i = 0; i < childNodes.getLength(); i++) {
205 if (childNodes.item(i) instanceof Element) {
206 result.add((Element) childNodes.item(i));
214 * Prepare non-conditional XPath suitable for deserialization
215 * with {@link StringModuleInstanceIdentifierCodec}
216 * @param schemaNode Top schema node
217 * @param target Edit operation target
218 * @param value Element with value
219 * @param namespace Module namespace
220 * @param revision Module revision
221 * @return Non-conditional XPath
223 private static String prepareNonCondXpath(@Nonnull final DataSchemaNode schemaNode, @Nonnull final String target,
224 @Nonnull final Element value, @Nonnull final String namespace, @Nonnull final String revision) {
225 final Iterator<String> args = Splitter.on("/").split(target.substring(target.indexOf(':') + 1)).iterator();
227 final StringBuilder nonCondXpath = new StringBuilder();
228 SchemaNode childNode = schemaNode;
230 while (args.hasNext()) {
231 final String s = args.next();
232 nonCondXpath.append("/");
233 nonCondXpath.append(s);
234 childNode = ((DataNodeContainer) childNode).getDataChildByName(QName.create(namespace, revision, s));
236 if ((childNode instanceof ListSchemaNode) && args.hasNext()) {
237 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), args);
241 if ((childNode instanceof ListSchemaNode) && (value != null)) {
242 final Iterator<String> keyValues = readKeyValues(value,
243 ((ListSchemaNode) childNode).getKeyDefinition().iterator());
244 appendKeys(nonCondXpath, ((ListSchemaNode) childNode).getKeyDefinition().iterator(), keyValues);
247 return nonCondXpath.toString();
251 * Read value for every list key
252 * @param value Value element
253 * @param keys Iterator of list keys names
254 * @return Iterator of list keys values
256 private static Iterator<String> readKeyValues(@Nonnull final Element value, @Nonnull final Iterator<QName> keys) {
257 final List<String> result = new ArrayList<>();
259 while (keys.hasNext()) {
260 result.add(value.getElementsByTagName(keys.next().getLocalName()).item(0).getFirstChild().getNodeValue());
263 return result.iterator();
267 * Append key name - key value pairs for every list key to {@code nonCondXpath}
268 * @param nonCondXpath Builder for creating non-conditional XPath
269 * @param keyNames Iterator of list keys names
270 * @param keyValues Iterator of list keys values
272 private static void appendKeys(@Nonnull final StringBuilder nonCondXpath, @Nonnull final Iterator<QName> keyNames,
273 @Nonnull final Iterator<String> keyValues) {
274 while (keyNames.hasNext()) {
275 nonCondXpath.append("[");
276 nonCondXpath.append(keyNames.next().getLocalName());
277 nonCondXpath.append("=");
278 nonCondXpath.append("'");
279 nonCondXpath.append(keyValues.next());
280 nonCondXpath.append("'");
281 nonCondXpath.append("]");