X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;ds=sidebyside;f=opendaylight%2Fnetconf%2Fnetconf-util%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fnetconf%2Futil%2Fxml%2FXmlUtil.java;fp=opendaylight%2Fnetconf%2Fnetconf-util%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fnetconf%2Futil%2Fxml%2FXmlUtil.java;h=a2d43b2279620c84966694ba83b8694ade18459d;hb=a92d9d6a21a0f6ca8d2153795721f500eaf29ee9;hp=0000000000000000000000000000000000000000;hpb=fbc3092ca33990f0fc4a47f008786a416c484488;p=controller.git

diff --git a/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/xml/XmlUtil.java b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/xml/XmlUtil.java
new file mode 100644
index 0000000000..a2d43b2279
--- /dev/null
+++ b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/xml/XmlUtil.java
@@ -0,0 +1,175 @@
+/*
+ * 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.xml;
+
+import java.io.*;
+
+import javax.xml.XMLConstants;
+import javax.xml.namespace.QName;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.*;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+import javax.xml.validation.Schema;
+import javax.xml.validation.SchemaFactory;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.xml.sax.SAXException;
+
+import com.google.common.base.Charsets;
+
+public class XmlUtil {
+
+    public static final String XMLNS_ATTRIBUTE_KEY = "xmlns";
+
+    public static Element readXmlToElement(String xmlContent) throws SAXException, IOException {
+        Document doc = readXmlToDocument(xmlContent);
+        return doc.getDocumentElement();
+    }
+
+    public static Element readXmlToElement(InputStream xmlContent) throws SAXException, IOException {
+        Document doc = readXmlToDocument(xmlContent);
+        return doc.getDocumentElement();
+    }
+
+    public static Document readXmlToDocument(String xmlContent) throws SAXException, IOException {
+        return readXmlToDocument(new ByteArrayInputStream(xmlContent.getBytes(Charsets.UTF_8)));
+    }
+
+    public static Document readXmlToDocument(InputStream xmlContent) throws SAXException, IOException {
+        DocumentBuilderFactory factory = getDocumentBuilderFactory();
+        DocumentBuilder dBuilder;
+        try {
+            dBuilder = factory.newDocumentBuilder();
+        } catch (ParserConfigurationException e) {
+            throw new RuntimeException(e);
+        }
+        Document doc = dBuilder.parse(xmlContent);
+
+        doc.getDocumentElement().normalize();
+        return doc;
+    }
+
+    public static Element readXmlToElement(File xmlFile) throws SAXException, IOException {
+        return readXmlToDocument(new FileInputStream(xmlFile)).getDocumentElement();
+    }
+
+    private static final DocumentBuilderFactory getDocumentBuilderFactory() {
+        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+        factory.setNamespaceAware(true);
+        factory.setCoalescing(true);
+        // factory.setValidating(true);
+        factory.setIgnoringElementContentWhitespace(true);
+        factory.setIgnoringComments(true);
+        return factory;
+    }
+
+    public static Document newDocument() {
+        DocumentBuilderFactory factory = getDocumentBuilderFactory();
+        try {
+            DocumentBuilder builder = factory.newDocumentBuilder();
+            Document document = builder.newDocument();
+            return document;
+        } catch (ParserConfigurationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static Element createTextElement(Document document, String name, String content) {
+        Element typeElement = document.createElement(name);
+        typeElement.appendChild(document.createTextNode(content));
+        return typeElement;
+    }
+
+    public static void addNamespaceAttr(Element root, String namespace) {
+        root.setAttribute(XMLNS_ATTRIBUTE_KEY, namespace);
+    }
+
+    public static void addPrefixedNamespaceAttr(Element root, String prefix, String namespace) {
+        root.setAttribute(concat(XMLNS_ATTRIBUTE_KEY, prefix), namespace);
+    }
+
+    public static Element createPrefixedTextElement(Document document, String key, String prefix, String moduleName) {
+        return createTextElement(document, key, concat(prefix, moduleName));
+    }
+
+    private static String concat(String prefix, String value) {
+        return prefix + ":" + value;
+    }
+
+    public static String toString(Document document) {
+        return toString(document.getDocumentElement());
+    }
+
+    public static String toString(Element xml) {
+        return toString(xml, false);
+    }
+
+    public static String toString(XmlElement xmlElement) {
+        return toString(xmlElement.getDomElement(), false);
+    }
+
+    public static String toString(Element xml, boolean addXmlDeclaration) {
+        try {
+            Transformer transformer = TransformerFactory.newInstance().newTransformer();
+            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
+            transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, addXmlDeclaration == true ? "no" : "yes");
+
+            StreamResult result = new StreamResult(new StringWriter());
+            DOMSource source = new DOMSource(xml);
+            transformer.transform(source, result);
+
+            String xmlString = result.getWriter().toString();
+            return xmlString;
+        } catch (IllegalArgumentException | TransformerFactoryConfigurationError | TransformerException e) {
+            throw new RuntimeException("Unable to serialize xml element " + xml, e);
+        }
+    }
+
+    public static String toString(Document doc, boolean addXmlDeclaration) {
+        return toString(doc.getDocumentElement(), addXmlDeclaration);
+    }
+
+    public static Schema loadSchema(InputStream... fromStreams) {
+        Source[] sources = new Source[fromStreams.length];
+        int i = 0;
+        for (InputStream stream : fromStreams) {
+            sources[i++] = new StreamSource(stream);
+        }
+
+        final SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
+        try {
+            return schemaFactory.newSchema(sources);
+        } catch (SAXException e) {
+            throw new IllegalStateException("Failed to instantiate XML schema", e);
+        }
+    }
+
+    public static Object evaluateXPath(XPathExpression expr, Object rootNode, QName returnType) {
+        try {
+            return expr.evaluate(rootNode, returnType);
+        } catch (XPathExpressionException e) {
+            throw new IllegalStateException("Error while evaluating xpath expression " + expr, e);
+        }
+    }
+
+    public static Document createDocumentCopy(Document original) {
+        final Document copiedDocument = newDocument();
+        final Node copiedRoot = copiedDocument.importNode(original.getDocumentElement(), true);
+        copiedDocument.appendChild(copiedRoot);
+        return copiedDocument;
+    }
+}