Move streams support classes

[netconf.git] / restconf / restconf-nb-rfc8040 / src / main / java / org / opendaylight / restconf / nb / rfc8040 / streams / listeners / XMLNotificationFormatter.java

diff --git a/restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/streams/listeners/XMLNotificationFormatter.java b/restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/streams/listeners/XMLNotificationFormatter.java
new file mode 100644 (file)
index 0000000..b4afe63
--- /dev/null
+++ b/restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/streams/listeners/XMLNotificationFormatter.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2020 PANTHEON.tech, s.r.o. 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.restconf.nb.rfc8040.streams.listeners;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.time.Instant;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamWriter;
+import javax.xml.xpath.XPathExpressionException;
+import org.opendaylight.mdsal.dom.api.DOMNotification;
+import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
+import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
+import org.opendaylight.yangtools.yang.data.codec.xml.XMLStreamNormalizedNodeStreamWriter;
+import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
+
+final class XMLNotificationFormatter extends NotificationFormatter {
+    private static final XMLNotificationFormatter INSTANCE = new XMLNotificationFormatter();
+
+    static final String NOTIFICATION_NAMESPACE = "urn:ietf:params:xml:ns:netconf:notification:1.0";
+    static final String NOTIFICATION_ELEMENT = "notification";
+
+    static final String DATA_CHANGED_NAMESPACE = "urn:opendaylight:params:xml:ns:yang:controller:md:sal:remote";
+    static final String DATA_CHANGED_NOTIFICATION_ELEMENT = "data-changed-notification";
+
+    static final String DATA_CHANGE_EVENT_ELEMENT = "data-change-event";
+
+    static final NotificationFormatterFactory FACTORY = new NotificationFormatterFactory() {
+        @Override
+        public XMLNotificationFormatter getFormatter(final String xpathFilter) throws XPathExpressionException {
+            return new XMLNotificationFormatter(xpathFilter);
+        }
+
+        @Override
+        public XMLNotificationFormatter getFormatter() {
+            return INSTANCE;
+        }
+    };
+
+    XMLNotificationFormatter() {
+
+    }
+
+    XMLNotificationFormatter(final String xpathFilter) throws XPathExpressionException {
+        super(xpathFilter);
+    }
+
+    @Override
+    String createText(final EffectiveModelContext schemaContext, final DOMNotification input, final Instant now,
+                      final boolean leafNodesOnly, final boolean skipData)
+            throws IOException {
+        final StringWriter writer = new StringWriter();
+        try {
+            final XMLStreamWriter xmlStreamWriter = XML_OUTPUT_FACTORY.createXMLStreamWriter(writer);
+            xmlStreamWriter.setDefaultNamespace(NOTIFICATION_NAMESPACE);
+
+            xmlStreamWriter.writeStartElement(NOTIFICATION_NAMESPACE, NOTIFICATION_ELEMENT);
+            xmlStreamWriter.writeDefaultNamespace(NOTIFICATION_NAMESPACE);
+
+            xmlStreamWriter.writeStartElement("eventTime");
+            xmlStreamWriter.writeCharacters(toRFC3339(now));
+            xmlStreamWriter.writeEndElement();
+
+            final NormalizedNodeStreamWriter nnStreamWriter =
+                    XMLStreamNormalizedNodeStreamWriter.create(xmlStreamWriter, schemaContext, input.getType());
+
+            final NormalizedNodeWriter nnWriter = NormalizedNodeWriter.forStreamWriter(nnStreamWriter);
+            nnWriter.write(input.getBody());
+            nnWriter.flush();
+
+            xmlStreamWriter.writeEndElement();
+            xmlStreamWriter.writeEndDocument();
+            xmlStreamWriter.flush();
+
+            nnWriter.close();
+
+            return writer.toString();
+        } catch (XMLStreamException e) {
+            throw new IOException("Failed to write notification content", e);
+        }
+    }
+}