restconf/restconf-nb-bierman02/src/main/java/org/opendaylight/netconf/sal/rest/impl/NormalizedNodeXmlBodyWriter.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.netconf.sal.rest.impl;
   9
  10 import java.io.IOException;
  11 import java.io.OutputStream;
  12 import java.lang.annotation.Annotation;
  13 import java.lang.reflect.Type;
  14 import java.net.URISyntaxException;
  15 import java.nio.charset.StandardCharsets;
  16 import java.util.Map.Entry;
  17 import javanet.staxutils.IndentingXMLStreamWriter;
  18 import javax.ws.rs.Produces;
  19 import javax.ws.rs.WebApplicationException;
  20 import javax.ws.rs.core.MediaType;
  21 import javax.ws.rs.core.MultivaluedMap;
  22 import javax.ws.rs.ext.MessageBodyWriter;
  23 import javax.ws.rs.ext.Provider;
  24 import javax.xml.XMLConstants;
  25 import javax.xml.stream.FactoryConfigurationError;
  26 import javax.xml.stream.XMLOutputFactory;
  27 import javax.xml.stream.XMLStreamException;
  28 import javax.xml.stream.XMLStreamWriter;
  29 import org.eclipse.jdt.annotation.Nullable;
  30 import org.opendaylight.netconf.sal.rest.api.Draft02;
  31 import org.opendaylight.netconf.sal.rest.api.RestconfNormalizedNodeWriter;
  32 import org.opendaylight.netconf.sal.rest.api.RestconfService;
  33 import org.opendaylight.netconf.util.NetconfUtil;
  34 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  35 import org.opendaylight.yangtools.yang.common.QName;
  36 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  37 import org.opendaylight.yangtools.yang.data.api.schema.DOMSourceAnyxmlNode;
  38 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  39 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  40 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  41 import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
  42 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  43 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  44 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
  45 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
  46 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
  47 import org.xml.sax.SAXException;
  48
  49 /**
  50  * Normalized node writer for XML.
  51  *
  52  * @deprecated This class will be replaced by NormalizedNodeXmlBodyWriter from restconf-nb-rfc8040
  53  */
  54 @Deprecated
  55 @Provider
  56 @Produces({
  57     Draft02.MediaTypes.API + RestconfService.XML,
  58     Draft02.MediaTypes.DATA + RestconfService.XML,
  59     Draft02.MediaTypes.OPERATION + RestconfService.XML,
  60     MediaType.APPLICATION_XML,
  61     MediaType.TEXT_XML
  62 })
  63 public class NormalizedNodeXmlBodyWriter implements MessageBodyWriter<NormalizedNodeContext> {
  64
  65     private static final XMLOutputFactory XML_FACTORY;
  66
  67     static {
  68         XML_FACTORY = XMLOutputFactory.newFactory();
  69         XML_FACTORY.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, true);
  70     }
  71
  72     @Override
  73     public boolean isWriteable(final Class<?> type, final Type genericType, final Annotation[] annotations,
  74             final MediaType mediaType) {
  75         return type.equals(NormalizedNodeContext.class);
  76     }
  77
  78     @Override
  79     public long getSize(final NormalizedNodeContext context, final Class<?> type, final Type genericType,
  80             final Annotation[] annotations, final MediaType mediaType) {
  81         return -1;
  82     }
  83
  84     @Override
  85     public void writeTo(final NormalizedNodeContext context, final Class<?> type, final Type genericType,
  86             final Annotation[] annotations, final MediaType mediaType,
  87             final MultivaluedMap<String, Object> httpHeaders, final OutputStream entityStream) throws IOException,
  88             WebApplicationException {
  89         for (final Entry<String, Object> entry : context.getNewHeaders().entrySet()) {
  90             httpHeaders.add(entry.getKey(), entry.getValue());
  91         }
  92         final InstanceIdentifierContext pathContext = context.getInstanceIdentifierContext();
  93         if (context.getData() == null) {
  94             return;
  95         }
  96
  97         XMLStreamWriter xmlWriter;
  98         try {
  99             xmlWriter = XML_FACTORY.createXMLStreamWriter(entityStream, StandardCharsets.UTF_8.name());
 100             if (context.getWriterParameters().isPrettyPrint()) {
 101                 xmlWriter = new IndentingXMLStreamWriter(xmlWriter);
 102             }
 103         } catch (final XMLStreamException | FactoryConfigurationError e) {
 104             throw new IllegalStateException(e);
 105         }
 106         final NormalizedNode data = context.getData();
 107
 108         writeNormalizedNode(xmlWriter, pathContext.inference().toSchemaInferenceStack(), pathContext, data,
 109             context.getWriterParameters().getDepth());
 110     }
 111
 112     private static void writeNormalizedNode(final XMLStreamWriter xmlWriter, final SchemaInferenceStack stack,
 113             final InstanceIdentifierContext pathContext, NormalizedNode data, final @Nullable Integer depth)
 114             throws IOException {
 115         final RestconfNormalizedNodeWriter nnWriter;
 116         final EffectiveModelContext schemaCtx = pathContext.getSchemaContext();
 117         if (stack.isEmpty()) {
 118             nnWriter = createNormalizedNodeWriter(xmlWriter, pathContext.inference(), depth);
 119             if (data instanceof DOMSourceAnyxmlNode) {
 120                 try {
 121                     writeElements(xmlWriter, nnWriter,
 122                             (ContainerNode) NetconfUtil.transformDOMSourceToNormalizedNode(schemaCtx,
 123                                     ((DOMSourceAnyxmlNode)data).body()).getResult());
 124                 } catch (XMLStreamException | URISyntaxException | SAXException e) {
 125                     throw new IOException("Cannot write anyxml", e);
 126                 }
 127             } else {
 128                 writeElements(xmlWriter, nnWriter, (ContainerNode) data);
 129             }
 130         }  else if (pathContext.getSchemaNode() instanceof RpcDefinition) {
 131             final var rpc = (RpcDefinition) pathContext.getSchemaNode();
 132             final var tmp = SchemaInferenceStack.of(pathContext.getSchemaContext());
 133             tmp.enterSchemaTree(rpc.getQName());
 134             tmp.enterSchemaTree(rpc.getOutput().getQName());
 135
 136             nnWriter = createNormalizedNodeWriter(xmlWriter, tmp.toInference(), depth);
 137             writeElements(xmlWriter, nnWriter, (ContainerNode) data);
 138         } else {
 139             stack.exit();
 140             nnWriter = createNormalizedNodeWriter(xmlWriter, stack.toInference(), depth);
 141             if (data instanceof MapEntryNode) {
 142                 // Restconf allows returning one list item. We need to wrap it
 143                 // in map node in order to serialize it properly
 144                 data = ImmutableNodes.mapNodeBuilder(data.getIdentifier().getNodeType())
 145                     .addChild((MapEntryNode) data)
 146                     .build();
 147             }
 148             nnWriter.write(data);
 149         }
 150         nnWriter.flush();
 151     }
 152
 153     private static RestconfNormalizedNodeWriter createNormalizedNodeWriter(final XMLStreamWriter xmlWriter,
 154             final Inference inference, final @Nullable Integer depth) {
 155         final NormalizedNodeStreamWriter xmlStreamWriter =
 156             XMLStreamNormalizedNodeStreamWriter.create(xmlWriter, inference);
 157         if (depth != null) {
 158             return DepthAwareNormalizedNodeWriter.forStreamWriter(xmlStreamWriter, depth);
 159         }
 160
 161         return RestconfDelegatingNormalizedNodeWriter.forStreamWriter(xmlStreamWriter);
 162     }
 163
 164     private static void writeElements(final XMLStreamWriter xmlWriter, final RestconfNormalizedNodeWriter nnWriter,
 165             final ContainerNode data) throws IOException {
 166         final QName name = data.getIdentifier().getNodeType();
 167         try {
 168             xmlWriter.writeStartElement(XMLConstants.DEFAULT_NS_PREFIX, name.getLocalName(),
 169                     name.getNamespace().toString());
 170             xmlWriter.writeDefaultNamespace(name.getNamespace().toString());
 171             for (final NormalizedNode child : data.body()) {
 172                 nnWriter.write(child);
 173             }
 174             nnWriter.flush();
 175             xmlWriter.writeEndElement();
 176             xmlWriter.flush();
 177         } catch (final XMLStreamException e) {
 178             throw new IOException("Failed to write elements", e);
 179         }
 180     }
 181 }