yang/yang-model-export/src/test/java/org/opendaylight/yangtools/yang/model/export/test/YinExportTestUtils.java

   1 /*
   2  * Copyright (c) 2017 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.yangtools.yang.model.export.test;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.io.IOException;
  12 import java.io.InputStream;
  13 import java.io.StringWriter;
  14 import javax.xml.transform.OutputKeys;
  15 import javax.xml.transform.Transformer;
  16 import javax.xml.transform.TransformerException;
  17 import javax.xml.transform.TransformerFactory;
  18 import javax.xml.transform.TransformerFactoryConfigurationError;
  19 import javax.xml.transform.dom.DOMSource;
  20 import javax.xml.transform.stream.StreamResult;
  21 import org.opendaylight.yangtools.util.xml.UntrustedXML;
  22 import org.w3c.dom.Document;
  23 import org.w3c.dom.Node;
  24 import org.xml.sax.SAXException;
  25
  26 public class YinExportTestUtils {
  27
  28     private YinExportTestUtils() {
  29         throw new UnsupportedOperationException("Utility class");
  30     }
  31
  32     public static Document loadDocument(final String xmlPath) throws IOException, SAXException {
  33         final InputStream resourceAsStream = SchemaContextEmitterTest.class.getResourceAsStream(xmlPath);
  34         final Document currentConfigElement = readXmlToDocument(resourceAsStream);
  35         Preconditions.checkNotNull(currentConfigElement);
  36         return currentConfigElement;
  37     }
  38
  39     static Document readXmlToDocument(final InputStream xmlContent) throws IOException, SAXException {
  40         final Document doc = UntrustedXML.newDocumentBuilder().parse(xmlContent);
  41         doc.getDocumentElement().normalize();
  42         return doc;
  43     }
  44
  45     public static String toString(final Node xml) {
  46         try {
  47             final Transformer transformer = TransformerFactory.newInstance().newTransformer();
  48             transformer.setOutputProperty(OutputKeys.INDENT, "yes");
  49             transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
  50
  51             final StreamResult result = new StreamResult(new StringWriter());
  52             final DOMSource source = new DOMSource(xml);
  53             transformer.transform(source, result);
  54
  55             return result.getWriter().toString();
  56         } catch (IllegalArgumentException | TransformerFactoryConfigurationError | TransformerException e) {
  57             throw new RuntimeException("Unable to serialize xml element " + xml, e);
  58         }
  59     }
  60 }