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 java.io.DataOutput;
13 import java.io.DataOutputStream;
14 import java.io.IOException;
15 import java.io.OutputStream;
16 import java.nio.charset.StandardCharsets;
17 import java.util.Collection;
18 import java.util.HashMap;
21 import org.opendaylight.yangtools.yang.common.QName;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
24 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
25 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
30 * NormalizedNodeOutputStreamWriter will be used by distributed datastore to send normalized node in
32 * A stream writer wrapper around this class will write node objects to stream in recursive manner.
33 * for example - If you have a ContainerNode which has a two LeafNode as children, then
34 * you will first call {@link #startContainerNode(YangInstanceIdentifier.NodeIdentifier, int)}, then will call
35 * {@link #leafNode(YangInstanceIdentifier.NodeIdentifier, Object)} twice and then, {@link #endNode()} to end
38 * Based on the each node, the node type is also written to the stream, that helps in reconstructing the object,
44 public class NormalizedNodeOutputStreamWriter implements NormalizedNodeDataOutput, NormalizedNodeStreamWriter {
46 private static final Logger LOG = LoggerFactory.getLogger(NormalizedNodeOutputStreamWriter.class);
48 private final DataOutput output;
50 private final Map<String, Integer> stringCodeMap = new HashMap<>();
52 private NormalizedNodeWriter normalizedNodeWriter;
54 private boolean wroteSignatureMarker;
57 * @deprecated Use {@link #NormalizedNodeOutputStreamWriter(DataOutput)} instead.
60 public NormalizedNodeOutputStreamWriter(final OutputStream stream) throws IOException {
61 this((DataOutput) new DataOutputStream(Preconditions.checkNotNull(stream)));
65 * @deprecated Use {@link NormalizedNodeInputOutput#newDataOutput(DataOutput)} instead.
68 public NormalizedNodeOutputStreamWriter(final DataOutput output) {
69 this.output = Preconditions.checkNotNull(output);
72 private NormalizedNodeWriter normalizedNodeWriter() {
73 if(normalizedNodeWriter == null) {
74 normalizedNodeWriter = NormalizedNodeWriter.forStreamWriter(this);
77 return normalizedNodeWriter;
81 public void writeNormalizedNode(NormalizedNode<?, ?> node) throws IOException {
82 writeSignatureMarkerAndVersionIfNeeded();
83 normalizedNodeWriter().write(node);
86 private void writeSignatureMarkerAndVersionIfNeeded() throws IOException {
87 if(!wroteSignatureMarker) {
88 output.writeByte(TokenTypes.SIGNATURE_MARKER);
89 output.writeShort(TokenTypes.LITHIUM_VERSION);
90 wroteSignatureMarker = true;
95 public void leafNode(YangInstanceIdentifier.NodeIdentifier name, Object value) throws IOException, IllegalArgumentException {
96 Preconditions.checkNotNull(name, "Node identifier should not be null");
97 LOG.debug("Writing a new leaf node");
98 startNode(name.getNodeType(), NodeTypes.LEAF_NODE);
104 public void startLeafSet(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
105 Preconditions.checkNotNull(name, "Node identifier should not be null");
106 LOG.debug("Starting a new leaf set");
108 startNode(name.getNodeType(), NodeTypes.LEAF_SET);
112 public void leafSetEntryNode(Object value) throws IOException, IllegalArgumentException {
113 LOG.debug("Writing a new leaf set entry node");
115 output.writeByte(NodeTypes.LEAF_SET_ENTRY_NODE);
120 public void startContainerNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
121 Preconditions.checkNotNull(name, "Node identifier should not be null");
123 LOG.debug("Starting a new container node");
125 startNode(name.getNodeType(), NodeTypes.CONTAINER_NODE);
129 public void startYangModeledAnyXmlNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
130 Preconditions.checkNotNull(name, "Node identifier should not be null");
132 LOG.debug("Starting a new yang modeled anyXml node");
134 startNode(name.getNodeType(), NodeTypes.YANG_MODELED_ANY_XML_NODE);
138 public void startUnkeyedList(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
139 Preconditions.checkNotNull(name, "Node identifier should not be null");
140 LOG.debug("Starting a new unkeyed list");
142 startNode(name.getNodeType(), NodeTypes.UNKEYED_LIST);
146 public void startUnkeyedListItem(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalStateException {
147 Preconditions.checkNotNull(name, "Node identifier should not be null");
148 LOG.debug("Starting a new unkeyed list item");
150 startNode(name.getNodeType(), NodeTypes.UNKEYED_LIST_ITEM);
154 public void startMapNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
155 Preconditions.checkNotNull(name, "Node identifier should not be null");
156 LOG.debug("Starting a new map node");
158 startNode(name.getNodeType(), NodeTypes.MAP_NODE);
162 public void startMapEntryNode(YangInstanceIdentifier.NodeIdentifierWithPredicates identifier, int childSizeHint) throws IOException, IllegalArgumentException {
163 Preconditions.checkNotNull(identifier, "Node identifier should not be null");
164 LOG.debug("Starting a new map entry node");
165 startNode(identifier.getNodeType(), NodeTypes.MAP_ENTRY_NODE);
167 writeKeyValueMap(identifier.getKeyValues());
172 public void startOrderedMapNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
173 Preconditions.checkNotNull(name, "Node identifier should not be null");
174 LOG.debug("Starting a new ordered map node");
176 startNode(name.getNodeType(), NodeTypes.ORDERED_MAP_NODE);
180 public void startChoiceNode(YangInstanceIdentifier.NodeIdentifier name, int childSizeHint) throws IOException, IllegalArgumentException {
181 Preconditions.checkNotNull(name, "Node identifier should not be null");
182 LOG.debug("Starting a new choice node");
184 startNode(name.getNodeType(), NodeTypes.CHOICE_NODE);
188 public void startAugmentationNode(YangInstanceIdentifier.AugmentationIdentifier identifier) throws IOException, IllegalArgumentException {
189 Preconditions.checkNotNull(identifier, "Node identifier should not be null");
190 LOG.debug("Starting a new augmentation node");
192 output.writeByte(NodeTypes.AUGMENTATION_NODE);
193 writeQNameSet(identifier.getPossibleChildNames());
197 public void anyxmlNode(YangInstanceIdentifier.NodeIdentifier name, Object value) throws IOException, IllegalArgumentException {
198 Preconditions.checkNotNull(name, "Node identifier should not be null");
199 LOG.debug("Writing a new xml node");
201 startNode(name.getNodeType(), NodeTypes.ANY_XML_NODE);
207 public void endNode() throws IOException, IllegalStateException {
208 LOG.debug("Ending the node");
210 output.writeByte(NodeTypes.END_NODE);
214 public void close() throws IOException {
219 public void flush() throws IOException {
220 if (output instanceof OutputStream) {
221 ((OutputStream)output).flush();
225 private void startNode(final QName qName, byte nodeType) throws IOException {
227 Preconditions.checkNotNull(qName, "QName of node identifier should not be null.");
229 writeSignatureMarkerAndVersionIfNeeded();
231 // First write the type of node
232 output.writeByte(nodeType);
237 private void writeQName(QName qName) throws IOException {
239 writeCodedString(qName.getLocalName());
240 writeCodedString(qName.getNamespace().toString());
241 writeCodedString(qName.getFormattedRevision());
244 private void writeCodedString(String key) throws IOException {
245 Integer value = stringCodeMap.get(key);
247 output.writeByte(TokenTypes.IS_CODE_VALUE);
248 output.writeInt(value);
251 output.writeByte(TokenTypes.IS_STRING_VALUE);
252 stringCodeMap.put(key, Integer.valueOf(stringCodeMap.size()));
253 output.writeUTF(key);
255 output.writeByte(TokenTypes.IS_NULL_VALUE);
260 private void writeObjSet(Set<?> set) throws IOException {
262 output.writeInt(set.size());
264 if(o instanceof String){
265 writeCodedString(o.toString());
267 throw new IllegalArgumentException("Expected value type to be String but was : " +
277 public void writeYangInstanceIdentifier(YangInstanceIdentifier identifier) throws IOException {
278 writeSignatureMarkerAndVersionIfNeeded();
279 writeYangInstanceIdentifierInternal(identifier);
282 private void writeYangInstanceIdentifierInternal(YangInstanceIdentifier identifier) throws IOException {
283 Collection<YangInstanceIdentifier.PathArgument> pathArguments = identifier.getPathArguments();
284 output.writeInt(pathArguments.size());
286 for(YangInstanceIdentifier.PathArgument pathArgument : pathArguments) {
287 writePathArgument(pathArgument);
292 public void writePathArgument(YangInstanceIdentifier.PathArgument pathArgument) throws IOException {
294 byte type = PathArgumentTypes.getSerializablePathArgumentType(pathArgument);
296 output.writeByte(type);
299 case PathArgumentTypes.NODE_IDENTIFIER:
301 YangInstanceIdentifier.NodeIdentifier nodeIdentifier =
302 (YangInstanceIdentifier.NodeIdentifier) pathArgument;
304 writeQName(nodeIdentifier.getNodeType());
307 case PathArgumentTypes.NODE_IDENTIFIER_WITH_PREDICATES:
309 YangInstanceIdentifier.NodeIdentifierWithPredicates nodeIdentifierWithPredicates =
310 (YangInstanceIdentifier.NodeIdentifierWithPredicates) pathArgument;
311 writeQName(nodeIdentifierWithPredicates.getNodeType());
313 writeKeyValueMap(nodeIdentifierWithPredicates.getKeyValues());
316 case PathArgumentTypes.NODE_IDENTIFIER_WITH_VALUE :
318 YangInstanceIdentifier.NodeWithValue nodeWithValue =
319 (YangInstanceIdentifier.NodeWithValue) pathArgument;
321 writeQName(nodeWithValue.getNodeType());
322 writeObject(nodeWithValue.getValue());
325 case PathArgumentTypes.AUGMENTATION_IDENTIFIER :
327 YangInstanceIdentifier.AugmentationIdentifier augmentationIdentifier =
328 (YangInstanceIdentifier.AugmentationIdentifier) pathArgument;
330 // No Qname in augmentation identifier
331 writeQNameSet(augmentationIdentifier.getPossibleChildNames());
334 throw new IllegalStateException("Unknown node identifier type is found : " + pathArgument.getClass().toString() );
338 private void writeKeyValueMap(Map<QName, Object> keyValueMap) throws IOException {
339 if(keyValueMap != null && !keyValueMap.isEmpty()) {
340 output.writeInt(keyValueMap.size());
341 Set<QName> qNameSet = keyValueMap.keySet();
343 for(QName qName : qNameSet) {
345 writeObject(keyValueMap.get(qName));
352 private void writeQNameSet(Set<QName> children) throws IOException {
353 // Write each child's qname separately, if list is empty send count as 0
354 if(children != null && !children.isEmpty()) {
355 output.writeInt(children.size());
356 for(QName qName : children) {
360 LOG.debug("augmentation node does not have any child");
365 private void writeObject(Object value) throws IOException {
367 byte type = ValueTypes.getSerializableType(value);
368 // Write object type first
369 output.writeByte(type);
372 case ValueTypes.BOOL_TYPE:
373 output.writeBoolean((Boolean) value);
375 case ValueTypes.QNAME_TYPE:
376 writeQName((QName) value);
378 case ValueTypes.INT_TYPE:
379 output.writeInt((Integer) value);
381 case ValueTypes.BYTE_TYPE:
382 output.writeByte((Byte) value);
384 case ValueTypes.LONG_TYPE:
385 output.writeLong((Long) value);
387 case ValueTypes.SHORT_TYPE:
388 output.writeShort((Short) value);
390 case ValueTypes.BITS_TYPE:
391 writeObjSet((Set<?>) value);
393 case ValueTypes.BINARY_TYPE:
394 byte[] bytes = (byte[]) value;
395 output.writeInt(bytes.length);
398 case ValueTypes.YANG_IDENTIFIER_TYPE:
399 writeYangInstanceIdentifierInternal((YangInstanceIdentifier) value);
401 case ValueTypes.NULL_TYPE :
403 case ValueTypes.STRING_BYTES_TYPE:
404 final byte[] valueBytes = value.toString().getBytes(StandardCharsets.UTF_8);
405 output.writeInt(valueBytes.length);
406 output.write(valueBytes);
409 output.writeUTF(value.toString());
415 public void write(int b) throws IOException {
416 writeSignatureMarkerAndVersionIfNeeded();
421 public void write(byte[] b) throws IOException {
422 writeSignatureMarkerAndVersionIfNeeded();
427 public void write(byte[] b, int off, int len) throws IOException {
428 writeSignatureMarkerAndVersionIfNeeded();
429 output.write(b, off, len);
433 public void writeBoolean(boolean v) throws IOException {
434 writeSignatureMarkerAndVersionIfNeeded();
435 output.writeBoolean(v);
439 public void writeByte(int v) throws IOException {
440 writeSignatureMarkerAndVersionIfNeeded();
445 public void writeShort(int v) throws IOException {
446 writeSignatureMarkerAndVersionIfNeeded();
447 output.writeShort(v);
451 public void writeChar(int v) throws IOException {
452 writeSignatureMarkerAndVersionIfNeeded();
457 public void writeInt(int v) throws IOException {
458 writeSignatureMarkerAndVersionIfNeeded();
463 public void writeLong(long v) throws IOException {
464 writeSignatureMarkerAndVersionIfNeeded();
469 public void writeFloat(float v) throws IOException {
470 writeSignatureMarkerAndVersionIfNeeded();
471 output.writeFloat(v);
475 public void writeDouble(double v) throws IOException {
476 writeSignatureMarkerAndVersionIfNeeded();
477 output.writeDouble(v);
481 public void writeBytes(String s) throws IOException {
482 writeSignatureMarkerAndVersionIfNeeded();
483 output.writeBytes(s);
487 public void writeChars(String s) throws IOException {
488 writeSignatureMarkerAndVersionIfNeeded();
489 output.writeChars(s);
493 public void writeUTF(String s) throws IOException {
494 writeSignatureMarkerAndVersionIfNeeded();