Move NetconfUtil to netconf-util.

[controller.git] / opendaylight / netconf / netconf-util / src / main / java / org / opendaylight / controller / netconf / util / NetconfUtil.java

diff --git a/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/NetconfUtil.java b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/NetconfUtil.java
new file mode 100644 (file)
index 0000000..aae2f71
--- /dev/null
+++ b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/NetconfUtil.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2013 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.controller.netconf.util;
+
+import com.google.common.base.Preconditions;
+import org.opendaylight.controller.config.api.ConflictingVersionException;
+import org.opendaylight.controller.netconf.api.NetconfMessage;
+import org.opendaylight.controller.netconf.util.xml.XMLNetconfUtil;
+import org.opendaylight.controller.netconf.util.xml.XmlElement;
+import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
+import org.opendaylight.controller.netconf.util.xml.XmlUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.xml.sax.SAXException;
+
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpression;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class NetconfUtil {
+
+    private static final Logger logger = LoggerFactory.getLogger(NetconfUtil.class);
+
+    public static NetconfMessage createMessage(final File f) {
+        Preconditions.checkNotNull(f, "File parameter was null");
+        try {
+            return createMessage(new FileInputStream(f));
+        } catch (final FileNotFoundException e) {
+            logger.warn("File {} not found.", f, e);
+        }
+        return null;
+    }
+
+    public static NetconfMessage createMessage(final InputStream is) {
+        Preconditions.checkNotNull(is, "InputStream parameter was null");
+        Document doc = null;
+        try {
+            doc = XmlUtil.readXmlToDocument(is);
+        } catch (final IOException e) {
+            logger.warn("Error ocurred while parsing stream.", e);
+        } catch (final SAXException e) {
+            logger.warn("Error ocurred while final parsing stream.", e);
+        }
+        return (doc == null) ? null : new NetconfMessage(doc);
+    }
+
+    public static void checkIsMessageOk(NetconfMessage responseMessage) throws ConflictingVersionException {
+        XmlElement element = XmlElement.fromDomDocument(responseMessage.getDocument());
+        Preconditions.checkState(element.getName().equals(XmlNetconfConstants.RPC_REPLY_KEY));
+        element = element.getOnlyChildElement();
+
+        if (element.getName().equals(XmlNetconfConstants.OK)) {
+            return;
+        }
+
+        if (element.getName().equals(XmlNetconfConstants.RPC_ERROR)) {
+            logger.warn("Can not load last configuration, operation failed");
+            // is it ConflictingVersionException ?
+            XPathExpression xPathExpression = XMLNetconfUtil.compileXPath("/netconf:rpc-reply/netconf:rpc-error/netconf:error-info/netconf:error");
+            String error = (String) XmlUtil.evaluateXPath(xPathExpression, element.getDomElement(), XPathConstants.STRING);
+            if (error!=null && error.contains(ConflictingVersionException.class.getCanonicalName())) {
+                throw new ConflictingVersionException(error);
+            }
+            throw new IllegalStateException("Can not load last configuration, operation failed: "
+                    + XmlUtil.toString(responseMessage.getDocument()));
+        }
+
+        logger.warn("Can not load last configuration. Operation failed.");
+        throw new IllegalStateException("Can not load last configuration. Operation failed: "
+                + XmlUtil.toString(responseMessage.getDocument()));
+    }
+}