+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
package org.opendaylight.yangtools.yang.data.impl.codec.xml;
+import com.google.common.annotations.Beta;
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
-
+import com.google.common.base.Verify;
import java.net.URI;
import java.util.Map.Entry;
-
+import javax.annotation.Nonnull;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
-
import org.opendaylight.yangtools.yang.common.QName;
-import org.opendaylight.yangtools.yang.data.api.AttributesContainer;
-import org.opendaylight.yangtools.yang.data.api.CompositeNode;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
-import org.opendaylight.yangtools.yang.data.api.Node;
-import org.opendaylight.yangtools.yang.data.api.SimpleNode;
+import org.opendaylight.yangtools.yang.common.QNameModule;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.impl.codec.TypeDefinitionAwareCodec;
-import org.opendaylight.yangtools.yang.data.impl.schema.SchemaUtils;
-import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
-import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
import org.opendaylight.yangtools.yang.model.api.SchemaNode;
import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
import org.opendaylight.yangtools.yang.model.api.type.InstanceIdentifierTypeDefinition;
+import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
+import org.opendaylight.yangtools.yang.model.util.SchemaContextUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
+/**
+ * Utility class for bridging JAXP Stream and YANG Data APIs. Note that the definition of this class
+ * by no means final and subject to change as more functionality is centralized here.
+ */
+@Beta
public class XmlStreamUtils {
private static final Logger LOG = LoggerFactory.getLogger(XmlStreamUtils.class);
+ private final XmlCodecProvider codecProvider;
+ private final Optional<SchemaContext> schemaContext;
+
+ /**
+ * @deprecated Use {@link #create(XmlCodecProvider)} instead. This method will be hidden and the class
+ * made final in a future release.
+ */
+ @Deprecated
+ protected XmlStreamUtils(final XmlCodecProvider codecProvider) {
+ this(codecProvider, null);
+ }
- public static void writeDataDocument(final XMLStreamWriter writer, final CompositeNode data, final SchemaNode schema, final XmlCodecProvider codecProvider) throws XMLStreamException {
- // final Boolean repairing = (Boolean) writer.getProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES);
- // Preconditions.checkArgument(repairing == true, "XML Stream Writer has to be repairing namespaces");
+ private XmlStreamUtils(final XmlCodecProvider codecProvider, final SchemaContext schemaContext) {
+ this.codecProvider = Preconditions.checkNotNull(codecProvider);
+ this.schemaContext = Optional.fromNullable(schemaContext);
+ }
- writer.writeStartDocument();
- writeData(writer, data, schema, codecProvider);
- writer.writeEndDocument();
- writer.flush();
+ /**
+ * Create a new instance encapsulating a particular codec provider.
+ *
+ * @param codecProvider XML codec provider
+ * @return A new instance
+ */
+ public static XmlStreamUtils create(final XmlCodecProvider codecProvider) {
+ return new XmlStreamUtils(codecProvider, null);
}
- public static void writeDataDocument(final XMLStreamWriter writer, final CompositeNode data, final XmlCodecProvider codecProvider) throws XMLStreamException {
- writeDataDocument(writer, data, null, codecProvider);
+ public static XmlStreamUtils create(final XmlCodecProvider codecProvider, final SchemaContext schemaContext) {
+ return new XmlStreamUtils(codecProvider, schemaContext);
}
- public static void write(final XMLStreamWriter writer, final InstanceIdentifier id) throws XMLStreamException {
- Preconditions.checkNotNull(writer, "Writer may not be null");
- Preconditions.checkNotNull(id, "Variable should contain instance of instance identifier and can't be null");
+ @VisibleForTesting
+ static void writeAttribute(final XMLStreamWriter writer, final Entry<QName, String> attribute, final RandomPrefix randomPrefix)
+ throws XMLStreamException {
+ final QName key = attribute.getKey();
+ final String prefix = randomPrefix.encodePrefix(key.getNamespace());
+ writer.writeAttribute("xmlns:" + prefix, key.getNamespace().toString());
+ writer.writeAttribute(prefix, key.getNamespace().toString(), key.getLocalName(), attribute.getValue());
+ }
- final RandomPrefix prefixes = new RandomPrefix();
- final String str = XmlUtils.encodeIdentifier(prefixes, id);
+ /**
+ * Write a value into a XML stream writer. This method assumes the start and end of element is
+ * emitted by the caller.
+ *
+ * @param writer XML Stream writer
+ * @param schemaNode Schema node that describes the value
+ * @param value data value
+ * @param parent optional parameter of a module QName owning the leaf definition
+ * @throws XMLStreamException if an encoding problem occurs
+ */
+ public void writeValue(@Nonnull final XMLStreamWriter writer, @Nonnull final SchemaNode schemaNode, final Object value, final Optional<QNameModule> parent) throws XMLStreamException {
+ if (value == null) {
+ LOG.debug("Value of {}:{} is null, not encoding it", schemaNode.getQName().getNamespace(), schemaNode.getQName().getLocalName());
+ return;
+ }
+
+ Preconditions.checkArgument(schemaNode instanceof LeafSchemaNode || schemaNode instanceof LeafListSchemaNode,
+ "Unable to write value for node %s, only nodes of type: leaf and leaf-list can be written at this point", schemaNode.getQName());
+
+ TypeDefinition<?> type = schemaNode instanceof LeafSchemaNode ?
+ ((LeafSchemaNode) schemaNode).getType():
+ ((LeafListSchemaNode) schemaNode).getType();
- for (Entry<URI, String> e: prefixes.getPrefixes()) {
- writer.writeNamespace(e.getValue(), e.getKey().toString());
+ TypeDefinition<?> baseType = XmlUtils.resolveBaseTypeFrom(type);
+
+ if (schemaContext.isPresent() && baseType instanceof LeafrefTypeDefinition) {
+ LeafrefTypeDefinition leafrefTypeDefinition = (LeafrefTypeDefinition) baseType;
+ baseType = SchemaContextUtil.getBaseTypeForLeafRef(leafrefTypeDefinition, schemaContext.get(), schemaNode);
+ Verify.verifyNotNull(baseType, "Unable to find base type for leafref node '%s'.", schemaNode.getPath());
}
- writer.writeCharacters(str);
+
+ writeValue(writer, baseType, value, parent);
}
- public static void writeData(final XMLStreamWriter writer, final Node<?> data, final SchemaNode schema, final XmlCodecProvider codecProvider) throws XMLStreamException {
- final QName qname = data.getNodeType();
- final String pfx = qname.getPrefix() != null ? qname.getPrefix() : "";
- final String ns;
- if (qname.getNamespace() != null) {
- ns = qname.getNamespace().toString();
- } else {
- ns = "";
- }
+ public void writeValue(@Nonnull final XMLStreamWriter writer, @Nonnull final SchemaNode schemaNode, final Object value) throws XMLStreamException {
+ writeValue(writer, schemaNode, value, Optional.<QNameModule>absent());
+ }
- writer.writeStartElement(pfx, qname.getLocalName(), ns);
- if (data instanceof AttributesContainer && ((AttributesContainer) data).getAttributes() != null) {
- for (Entry<QName, String> attribute : ((AttributesContainer) data).getAttributes().entrySet()) {
- writer.writeAttribute(attribute.getKey().getNamespace().toString(), attribute.getKey().getLocalName(), attribute.getValue());
- }
+ public void writeValue(@Nonnull final XMLStreamWriter writer, @Nonnull final SchemaNode schemaNode, final Object value, final QNameModule parent) throws XMLStreamException {
+ writeValue(writer, schemaNode, value, Optional.of(parent));
+ }
+
+ /**
+ * Write a value into a XML stream writer. This method assumes the start and end of element is
+ * emitted by the caller.
+ *
+ * @param writer XML Stream writer
+ * @param type data type. In case of leaf ref this should be the type of leaf being referenced
+ * @param value data value
+ * @param parent optional parameter of a module QName owning the leaf definition
+ * @throws XMLStreamException if an encoding problem occurs
+ */
+ public void writeValue(@Nonnull final XMLStreamWriter writer, @Nonnull final TypeDefinition<?> type, final Object value, final Optional<QNameModule> parent) throws XMLStreamException {
+ if (value == null) {
+ LOG.debug("Value of {}:{} is null, not encoding it", type.getQName().getNamespace(), type.getQName().getLocalName());
+ return;
}
+ TypeDefinition<?> baseType = XmlUtils.resolveBaseTypeFrom(type);
- if (data instanceof SimpleNode<?>) {
- // Simple node
- if (schema instanceof LeafListSchemaNode) {
- writeValue(writer, ((LeafListSchemaNode) schema).getType(), codecProvider, data.getValue());
- } else if (schema instanceof LeafSchemaNode) {
- writeValue(writer, ((LeafSchemaNode) schema).getType(), codecProvider, data.getValue());
+ if (baseType instanceof IdentityrefTypeDefinition) {
+ if (parent.isPresent()) {
+ write(writer, (IdentityrefTypeDefinition) baseType, value, parent);
} else {
- Object value = data.getValue();
- if (value != null) {
- writer.writeCharacters(String.valueOf(value));
- }
+ write(writer, (IdentityrefTypeDefinition) baseType, value, Optional.<QNameModule>absent());
}
+ } else if (baseType instanceof InstanceIdentifierTypeDefinition) {
+ write(writer, (InstanceIdentifierTypeDefinition) baseType, value);
} else {
- // CompositeNode
- for (Node<?> child : ((CompositeNode) data).getValue()) {
- DataSchemaNode childSchema = null;
- if (schema instanceof DataNodeContainer) {
- childSchema = SchemaUtils.findFirstSchema(child.getNodeType(), ((DataNodeContainer) schema).getChildNodes()).orNull();
- if (LOG.isDebugEnabled()) {
- if (childSchema == null) {
- LOG.debug("Probably the data node \"{}\" does not conform to schema", child == null ? "" : child.getNodeType().getLocalName());
- }
- }
+ final TypeDefinitionAwareCodec<Object, ?> codec = codecProvider.codecFor(type);
+ String text;
+ if (codec != null) {
+ try {
+ text = codec.serialize(value);
+ } catch (ClassCastException e) {
+ LOG.error("Provided node value {} did not have type {} required by mapping. Using stream instead.", value, type, e);
+ text = String.valueOf(value);
}
-
- writeData(writer, child, childSchema, codecProvider);
+ } else {
+ LOG.error("Failed to find codec for {}, falling back to using stream", type);
+ text = String.valueOf(value);
}
+ writer.writeCharacters(text);
}
+ }
- writer.writeEndElement();
+ public void writeValue(@Nonnull final XMLStreamWriter writer, @Nonnull final TypeDefinition<?> type, final Object value, final QNameModule parent) throws XMLStreamException {
+ writeValue(writer, type, value, Optional.of(parent));
}
- public static void writeValue(final XMLStreamWriter writer, final TypeDefinition<?> type, final XmlCodecProvider codecProvider, final Object nodeValue) throws XMLStreamException {
- TypeDefinition<?> baseType = XmlUtils.resolveBaseTypeFrom(type);
- if (baseType instanceof IdentityrefTypeDefinition) {
- if (nodeValue instanceof QName) {
- QName value = (QName) nodeValue;
- String prefix = "x";
- if (value.getPrefix() != null && !value.getPrefix().isEmpty()) {
- prefix = value.getPrefix();
- }
+ public void writeValue(@Nonnull final XMLStreamWriter writer, @Nonnull final TypeDefinition<?> type, final Object value) throws XMLStreamException {
+ writeValue(writer, type, value, Optional.<QNameModule>absent());
+ }
- writer.writeNamespace(prefix, value.getNamespace().toString());
- writer.writeCharacters(prefix + ':' + value.getLocalName());
- } else {
- Object value = nodeValue;
- LOG.debug("Value of {}:{} is not instance of QName but is {}", baseType.getQName().getNamespace(),
- baseType.getQName().getLocalName(), value != null ? value.getClass() : "null");
- if (value != null) {
- writer.writeCharacters(String.valueOf(value));
- }
- }
- } else if (baseType instanceof InstanceIdentifierTypeDefinition) {
- if (nodeValue instanceof InstanceIdentifier) {
- write(writer, (InstanceIdentifier)nodeValue);
+ @VisibleForTesting
+ static void write(@Nonnull final XMLStreamWriter writer, @Nonnull final IdentityrefTypeDefinition type, @Nonnull final Object value, final Optional<QNameModule> parent) throws XMLStreamException {
+ if (value instanceof QName) {
+ final QName qname = (QName) value;
+ final String prefix = "x";
+
+ //in case parent is present and same as element namespace write value without namespace
+ if (parent.isPresent() && qname.getNamespace().equals(parent.get().getNamespace())){
+ writer.writeCharacters(qname.getLocalName());
} else {
- Object value = nodeValue;
- LOG.debug("Value of {}:{} is not instance of InstanceIdentifier but is {}", baseType.getQName()
- .getNamespace(), //
- baseType.getQName().getLocalName(), value != null ? value.getClass() : "null");
- if (value != null) {
- writer.writeCharacters(String.valueOf(value));
- }
+ final String ns = qname.getNamespace().toString();
+ writer.writeNamespace(prefix, ns);
+ writer.writeCharacters(prefix + ':' + qname.getLocalName());
}
+
} else {
- if (nodeValue != null) {
- final TypeDefinitionAwareCodec<Object, ?> codec = codecProvider.codecFor(baseType);
- String text;
- if (codec != null) {
- try {
- text = codec.serialize(nodeValue);
- } catch (ClassCastException e) {
- LOG.error("Provided node value {} did not have type {} required by mapping. Using stream instead.", nodeValue, baseType, e);
- text = String.valueOf(nodeValue);
- }
- } else {
- LOG.error("Failed to find codec for {}, falling back to using stream", baseType);
- text = String.valueOf(nodeValue);
- }
- writer.writeCharacters(text);
- }
+ LOG.debug("Value of {}:{} is not a QName but {}", type.getQName().getNamespace(), type.getQName().getLocalName(), value.getClass());
+ writer.writeCharacters(String.valueOf(value));
+ }
+ }
+
+ private void write(@Nonnull final XMLStreamWriter writer, @Nonnull final InstanceIdentifierTypeDefinition type, @Nonnull final Object value) throws XMLStreamException {
+ if (value instanceof YangInstanceIdentifier) {
+ writeInstanceIdentifier(writer, (YangInstanceIdentifier)value);
+ } else {
+ LOG.warn("Value of {}:{} is not an InstanceIdentifier but {}", type.getQName().getNamespace(), type.getQName().getLocalName(), value.getClass());
+ writer.writeCharacters(String.valueOf(value));
+ }
+ }
+
+ public void writeInstanceIdentifier(final XMLStreamWriter writer, final YangInstanceIdentifier value) throws XMLStreamException {
+ if(schemaContext.isPresent()) {
+ RandomPrefixInstanceIdentifierSerializer iiCodec = new RandomPrefixInstanceIdentifierSerializer(schemaContext.get());
+ String serializedValue = iiCodec.serialize(value);
+ writeNamespaceDeclarations(writer,iiCodec.getPrefixes());
+ writer.writeCharacters(serializedValue);
+ } else {
+ LOG.warn("Schema context not present in {}, serializing {} without schema.",this,value);
+ writeInstanceIdentifier(writer, value);
+ }
+ }
+
+ private static void writeNamespaceDeclarations(final XMLStreamWriter writer, final Iterable<Entry<URI, String>> prefixes) throws XMLStreamException {
+ for (Entry<URI, String> e: prefixes) {
+ final String ns = e.getKey().toString();
+ final String p = e.getValue();
+ writer.writeNamespace(p, ns);
}
}
}
Code Review / yangtools.git / blobdiff