2 * Copyright (c) 2014, 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.controller.cluster.datastore.node.utils.stream;
11 import com.google.common.base.Preconditions;
12 import com.google.common.base.Strings;
13 import java.io.DataInput;
14 import java.io.IOException;
15 import java.io.StringReader;
16 import java.math.BigDecimal;
17 import java.math.BigInteger;
18 import java.nio.charset.StandardCharsets;
19 import java.util.ArrayList;
20 import java.util.Collection;
21 import java.util.HashMap;
22 import java.util.HashSet;
23 import java.util.List;
26 import javax.xml.parsers.DocumentBuilderFactory;
27 import javax.xml.parsers.ParserConfigurationException;
28 import javax.xml.transform.dom.DOMSource;
29 import org.opendaylight.controller.cluster.datastore.node.utils.QNameFactory;
30 import org.opendaylight.yangtools.yang.common.Empty;
31 import org.opendaylight.yangtools.yang.common.QName;
32 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
33 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
34 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
35 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeWithValue;
36 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
37 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
38 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
39 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
40 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
41 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.ListNodeBuilder;
42 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeAttrBuilder;
43 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeContainerBuilder;
44 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
45 import org.slf4j.Logger;
46 import org.slf4j.LoggerFactory;
47 import org.w3c.dom.Element;
48 import org.xml.sax.InputSource;
49 import org.xml.sax.SAXException;
52 * NormalizedNodeInputStreamReader reads the byte stream and constructs the normalized node including its children
53 * nodes. This process goes in recursive manner, where each NodeTypes object signifies the start of the object, except
54 * END_NODE. If a node can have children, then that node's end is calculated based on appearance of END_NODE.
56 public class NormalizedNodeInputStreamReader implements NormalizedNodeDataInput {
58 private static final Logger LOG = LoggerFactory.getLogger(NormalizedNodeInputStreamReader.class);
60 private static final String REVISION_ARG = "?revision=";
62 private final DataInput input;
64 private final Map<Integer, String> codedStringMap = new HashMap<>();
66 private QName lastLeafSetQName;
68 private NormalizedNodeAttrBuilder<YangInstanceIdentifier.NodeIdentifier,
69 Object, LeafNode<Object>> leafBuilder;
71 @SuppressWarnings("rawtypes")
72 private NormalizedNodeAttrBuilder<NodeWithValue, Object, LeafSetEntryNode<Object>> leafSetEntryBuilder;
74 private final StringBuilder reusableStringBuilder = new StringBuilder(50);
76 private boolean readSignatureMarker = true;
78 NormalizedNodeInputStreamReader(final DataInput input, final boolean versionChecked) {
79 this.input = Preconditions.checkNotNull(input);
80 readSignatureMarker = !versionChecked;
84 public NormalizedNode<?, ?> readNormalizedNode() throws IOException {
85 readSignatureMarkerAndVersionIfNeeded();
86 return readNormalizedNodeInternal();
89 private void readSignatureMarkerAndVersionIfNeeded() throws IOException {
90 if (readSignatureMarker) {
91 readSignatureMarker = false;
93 final byte marker = input.readByte();
94 if (marker != TokenTypes.SIGNATURE_MARKER) {
95 throw new InvalidNormalizedNodeStreamException(String.format(
96 "Invalid signature marker: %d", marker));
99 final short version = input.readShort();
100 if (version != TokenTypes.LITHIUM_VERSION) {
101 throw new InvalidNormalizedNodeStreamException(String.format("Unhandled stream version %s", version));
106 private NormalizedNode<?, ?> readNormalizedNodeInternal() throws IOException {
107 // each node should start with a byte
108 byte nodeType = input.readByte();
110 if (nodeType == NodeTypes.END_NODE) {
111 LOG.trace("End node reached. return");
112 lastLeafSetQName = null;
117 case NodeTypes.AUGMENTATION_NODE :
118 YangInstanceIdentifier.AugmentationIdentifier augIdentifier =
119 new YangInstanceIdentifier.AugmentationIdentifier(readQNameSet());
121 LOG.trace("Reading augmentation node {} ", augIdentifier);
123 return addDataContainerChildren(Builders.augmentationBuilder()
124 .withNodeIdentifier(augIdentifier)).build();
126 case NodeTypes.LEAF_SET_ENTRY_NODE :
127 QName name = lastLeafSetQName;
132 Object value = readObject();
133 NodeWithValue<Object> leafIdentifier = new NodeWithValue<>(name, value);
135 LOG.trace("Reading leaf set entry node {}, value {}", leafIdentifier, value);
137 return leafSetEntryBuilder().withNodeIdentifier(leafIdentifier).withValue(value).build();
139 case NodeTypes.MAP_ENTRY_NODE :
140 NodeIdentifierWithPredicates entryIdentifier = new NodeIdentifierWithPredicates(
141 readQName(), readKeyValueMap());
143 LOG.trace("Reading map entry node {} ", entryIdentifier);
145 return addDataContainerChildren(Builders.mapEntryBuilder()
146 .withNodeIdentifier(entryIdentifier)).build();
149 return readNodeIdentifierDependentNode(nodeType, new NodeIdentifier(readQName()));
153 private NormalizedNodeAttrBuilder<YangInstanceIdentifier.NodeIdentifier,
154 Object, LeafNode<Object>> leafBuilder() {
155 if (leafBuilder == null) {
156 leafBuilder = Builders.leafBuilder();
162 @SuppressWarnings("rawtypes")
163 private NormalizedNodeAttrBuilder<NodeWithValue, Object,
164 LeafSetEntryNode<Object>> leafSetEntryBuilder() {
165 if (leafSetEntryBuilder == null) {
166 leafSetEntryBuilder = Builders.leafSetEntryBuilder();
169 return leafSetEntryBuilder;
172 private NormalizedNode<?, ?> readNodeIdentifierDependentNode(final byte nodeType, final NodeIdentifier identifier)
176 case NodeTypes.LEAF_NODE :
177 LOG.trace("Read leaf node {}", identifier);
178 // Read the object value
179 return leafBuilder().withNodeIdentifier(identifier).withValue(readObject()).build();
181 case NodeTypes.ANY_XML_NODE :
182 LOG.trace("Read xml node");
183 return Builders.anyXmlBuilder().withNodeIdentifier(identifier).withValue(readDOMSource()).build();
185 case NodeTypes.MAP_NODE :
186 LOG.trace("Read map node {}", identifier);
187 return addDataContainerChildren(Builders.mapBuilder().withNodeIdentifier(identifier)).build();
189 case NodeTypes.CHOICE_NODE:
190 LOG.trace("Read choice node {}", identifier);
191 return addDataContainerChildren(Builders.choiceBuilder().withNodeIdentifier(identifier)).build();
193 case NodeTypes.ORDERED_MAP_NODE:
194 LOG.trace("Reading ordered map node {}", identifier);
195 return addDataContainerChildren(Builders.orderedMapBuilder().withNodeIdentifier(identifier)).build();
197 case NodeTypes.UNKEYED_LIST:
198 LOG.trace("Read unkeyed list node {}", identifier);
199 return addDataContainerChildren(Builders.unkeyedListBuilder().withNodeIdentifier(identifier)).build();
201 case NodeTypes.UNKEYED_LIST_ITEM:
202 LOG.trace("Read unkeyed list item node {}", identifier);
203 return addDataContainerChildren(Builders.unkeyedListEntryBuilder()
204 .withNodeIdentifier(identifier)).build();
206 case NodeTypes.CONTAINER_NODE:
207 LOG.trace("Read container node {}", identifier);
208 return addDataContainerChildren(Builders.containerBuilder().withNodeIdentifier(identifier)).build();
210 case NodeTypes.LEAF_SET :
211 LOG.trace("Read leaf set node {}", identifier);
212 return addLeafSetChildren(identifier.getNodeType(),
213 Builders.leafSetBuilder().withNodeIdentifier(identifier)).build();
215 case NodeTypes.ORDERED_LEAF_SET:
216 LOG.trace("Read ordered leaf set node {}", identifier);
217 return addLeafSetChildren(identifier.getNodeType(),
218 Builders.orderedLeafSetBuilder().withNodeIdentifier(identifier)).build();
225 private DOMSource readDOMSource() throws IOException {
226 String xml = readObject().toString();
228 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
229 factory.setNamespaceAware(true);
230 Element node = factory.newDocumentBuilder().parse(
231 new InputSource(new StringReader(xml))).getDocumentElement();
232 return new DOMSource(node);
233 } catch (SAXException | ParserConfigurationException e) {
234 throw new IOException("Error parsing XML: " + xml, e);
238 private QName readQName() throws IOException {
239 // Read in the same sequence of writing
240 String localName = readCodedString();
241 String namespace = readCodedString();
242 String revision = readCodedString();
245 if (!Strings.isNullOrEmpty(revision)) {
246 qname = reusableStringBuilder.append('(').append(namespace).append(REVISION_ARG).append(revision)
247 .append(')').append(localName).toString();
249 qname = reusableStringBuilder.append('(').append(namespace).append(')').append(localName).toString();
252 reusableStringBuilder.delete(0, reusableStringBuilder.length());
253 return QNameFactory.create(qname);
257 private String readCodedString() throws IOException {
258 byte valueType = input.readByte();
259 if (valueType == TokenTypes.IS_CODE_VALUE) {
260 return codedStringMap.get(input.readInt());
261 } else if (valueType == TokenTypes.IS_STRING_VALUE) {
262 String value = input.readUTF().intern();
263 codedStringMap.put(codedStringMap.size(), value);
270 private Set<QName> readQNameSet() throws IOException {
271 // Read the children count
272 int count = input.readInt();
273 Set<QName> children = new HashSet<>(count);
274 for (int i = 0; i < count; i++) {
275 children.add(readQName());
280 private Map<QName, Object> readKeyValueMap() throws IOException {
281 int count = input.readInt();
282 Map<QName, Object> keyValueMap = new HashMap<>(count);
284 for (int i = 0; i < count; i++) {
285 keyValueMap.put(readQName(), readObject());
291 private Object readObject() throws IOException {
292 byte objectType = input.readByte();
293 switch (objectType) {
294 case ValueTypes.BITS_TYPE:
297 case ValueTypes.BOOL_TYPE :
298 return input.readBoolean();
300 case ValueTypes.BYTE_TYPE :
301 return input.readByte();
303 case ValueTypes.INT_TYPE :
304 return input.readInt();
306 case ValueTypes.LONG_TYPE :
307 return input.readLong();
309 case ValueTypes.QNAME_TYPE :
312 case ValueTypes.SHORT_TYPE :
313 return input.readShort();
315 case ValueTypes.STRING_TYPE :
316 return input.readUTF();
318 case ValueTypes.STRING_BYTES_TYPE:
319 return readStringBytes();
321 case ValueTypes.BIG_DECIMAL_TYPE :
322 return new BigDecimal(input.readUTF());
324 case ValueTypes.BIG_INTEGER_TYPE :
325 return new BigInteger(input.readUTF());
327 case ValueTypes.BINARY_TYPE :
328 byte[] bytes = new byte[input.readInt()];
329 input.readFully(bytes);
332 case ValueTypes.YANG_IDENTIFIER_TYPE :
333 return readYangInstanceIdentifierInternal();
335 case ValueTypes.EMPTY_TYPE:
336 // Leaf nodes no longer allow null values and thus we no longer emit null values. Previously, the "empty"
337 // yang type was represented as null so we translate an incoming null value to Empty. It was possible for
338 // a BI user to set a string leaf to null and we're rolling the dice here but the chances for that are
339 // very low. We'd have to know the yang type but, even if we did, we can't let a null value pass upstream
340 // so we'd have to drop the leaf which might cause other issues.
341 case ValueTypes.NULL_TYPE:
342 return Empty.getInstance();
349 private String readStringBytes() throws IOException {
350 byte[] bytes = new byte[input.readInt()];
351 input.readFully(bytes);
352 return new String(bytes, StandardCharsets.UTF_8);
356 public SchemaPath readSchemaPath() throws IOException {
357 readSignatureMarkerAndVersionIfNeeded();
359 final boolean absolute = input.readBoolean();
360 final int size = input.readInt();
361 final Collection<QName> qnames = new ArrayList<>(size);
362 for (int i = 0; i < size; ++i) {
363 qnames.add(readQName());
366 return SchemaPath.create(qnames, absolute);
370 public YangInstanceIdentifier readYangInstanceIdentifier() throws IOException {
371 readSignatureMarkerAndVersionIfNeeded();
372 return readYangInstanceIdentifierInternal();
375 private YangInstanceIdentifier readYangInstanceIdentifierInternal() throws IOException {
376 int size = input.readInt();
378 List<PathArgument> pathArguments = new ArrayList<>(size);
380 for (int i = 0; i < size; i++) {
381 pathArguments.add(readPathArgument());
383 return YangInstanceIdentifier.create(pathArguments);
386 private Set<String> readObjSet() throws IOException {
387 int count = input.readInt();
388 Set<String> children = new HashSet<>(count);
389 for (int i = 0; i < count; i++) {
390 children.add(readCodedString());
396 public PathArgument readPathArgument() throws IOException {
398 int type = input.readByte();
402 case PathArgumentTypes.AUGMENTATION_IDENTIFIER :
403 return new YangInstanceIdentifier.AugmentationIdentifier(readQNameSet());
405 case PathArgumentTypes.NODE_IDENTIFIER :
406 return new NodeIdentifier(readQName());
408 case PathArgumentTypes.NODE_IDENTIFIER_WITH_PREDICATES :
409 return new NodeIdentifierWithPredicates(readQName(), readKeyValueMap());
411 case PathArgumentTypes.NODE_IDENTIFIER_WITH_VALUE :
412 return new NodeWithValue<>(readQName(), readObject());
419 @SuppressWarnings("unchecked")
420 private ListNodeBuilder<Object, LeafSetEntryNode<Object>> addLeafSetChildren(final QName nodeType,
421 final ListNodeBuilder<Object, LeafSetEntryNode<Object>> builder) throws IOException {
423 LOG.trace("Reading children of leaf set");
425 lastLeafSetQName = nodeType;
427 LeafSetEntryNode<Object> child = (LeafSetEntryNode<Object>)readNormalizedNodeInternal();
429 while (child != null) {
430 builder.withChild(child);
431 child = (LeafSetEntryNode<Object>)readNormalizedNodeInternal();
436 @SuppressWarnings({ "unchecked", "rawtypes" })
437 private NormalizedNodeContainerBuilder addDataContainerChildren(
438 final NormalizedNodeContainerBuilder builder) throws IOException {
439 LOG.trace("Reading data container (leaf nodes) nodes");
441 NormalizedNode<?, ?> child = readNormalizedNodeInternal();
443 while (child != null) {
444 builder.addChild(child);
445 child = readNormalizedNodeInternal();
451 public void readFully(final byte[] value) throws IOException {
452 readSignatureMarkerAndVersionIfNeeded();
453 input.readFully(value);
457 public void readFully(final byte[] str, final int off, final int len) throws IOException {
458 readSignatureMarkerAndVersionIfNeeded();
459 input.readFully(str, off, len);
463 public int skipBytes(final int num) throws IOException {
464 readSignatureMarkerAndVersionIfNeeded();
465 return input.skipBytes(num);
469 public boolean readBoolean() throws IOException {
470 readSignatureMarkerAndVersionIfNeeded();
471 return input.readBoolean();
475 public byte readByte() throws IOException {
476 readSignatureMarkerAndVersionIfNeeded();
477 return input.readByte();
481 public int readUnsignedByte() throws IOException {
482 readSignatureMarkerAndVersionIfNeeded();
483 return input.readUnsignedByte();
487 public short readShort() throws IOException {
488 readSignatureMarkerAndVersionIfNeeded();
489 return input.readShort();
493 public int readUnsignedShort() throws IOException {
494 readSignatureMarkerAndVersionIfNeeded();
495 return input.readUnsignedShort();
499 public char readChar() throws IOException {
500 readSignatureMarkerAndVersionIfNeeded();
501 return input.readChar();
505 public int readInt() throws IOException {
506 readSignatureMarkerAndVersionIfNeeded();
507 return input.readInt();
511 public long readLong() throws IOException {
512 readSignatureMarkerAndVersionIfNeeded();
513 return input.readLong();
517 public float readFloat() throws IOException {
518 readSignatureMarkerAndVersionIfNeeded();
519 return input.readFloat();
523 public double readDouble() throws IOException {
524 readSignatureMarkerAndVersionIfNeeded();
525 return input.readDouble();
529 public String readLine() throws IOException {
530 readSignatureMarkerAndVersionIfNeeded();
531 return input.readLine();
535 public String readUTF() throws IOException {
536 readSignatureMarkerAndVersionIfNeeded();
537 return input.readUTF();