yang/yang-data-codec-xml/src/test/java/org/opendaylight/yangtools/yang/data/codec/xml/DOMSourceXMLStreamReaderTest.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies, s.r.o. 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.data.codec.xml;
   9
  10 import static java.util.Objects.requireNonNull;
  11 import static org.junit.Assert.assertFalse;
  12 import static org.junit.Assert.assertNotNull;
  13
  14 import com.google.common.collect.ImmutableList;
  15 import java.io.IOException;
  16 import java.io.InputStream;
  17 import java.io.StringWriter;
  18 import javax.xml.stream.XMLOutputFactory;
  19 import javax.xml.stream.XMLStreamReader;
  20 import javax.xml.stream.XMLStreamWriter;
  21 import javax.xml.transform.OutputKeys;
  22 import javax.xml.transform.Transformer;
  23 import javax.xml.transform.TransformerException;
  24 import javax.xml.transform.TransformerFactory;
  25 import javax.xml.transform.TransformerFactoryConfigurationError;
  26 import javax.xml.transform.dom.DOMResult;
  27 import javax.xml.transform.dom.DOMSource;
  28 import javax.xml.transform.stream.StreamResult;
  29 import org.junit.Test;
  30 import org.opendaylight.yangtools.util.xml.UntrustedXML;
  31 import org.opendaylight.yangtools.yang.common.QName;
  32 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  33 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
  34 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
  35 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
  36 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
  37 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
  38 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  39 import org.opendaylight.yangtools.yang.model.util.SchemaContextUtil;
  40 import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;
  41 import org.w3c.dom.Document;
  42 import org.w3c.dom.Node;
  43 import org.xml.sax.SAXException;
  44
  45 public class DOMSourceXMLStreamReaderTest {
  46
  47     @Test
  48     public void test() throws Exception {
  49         final SchemaContext schemaContext = YangParserTestUtils.parseYangResourceDirectory("/dom-reader-test");
  50         final ContainerSchemaNode outerContainerSchema = (ContainerSchemaNode) SchemaContextUtil
  51                 .findNodeInSchemaContext(schemaContext, ImmutableList.of(QName.create("foo-ns", "1970-01-01",
  52                         "top-cont")));
  53         assertNotNull(outerContainerSchema);
  54
  55         // deserialization
  56         final Document doc = loadDocument("/dom-reader-test/foo.xml");
  57         final DOMSource inputXml = new DOMSource(doc.getDocumentElement());
  58         XMLStreamReader domXMLReader = new DOMSourceXMLStreamReader(inputXml);
  59
  60         final NormalizedNodeResult result = new NormalizedNodeResult();
  61         final NormalizedNodeStreamWriter streamWriter = ImmutableNormalizedNodeStreamWriter.from(result);
  62         final XmlParserStream xmlParser = XmlParserStream.create(streamWriter, schemaContext, outerContainerSchema);
  63         xmlParser.parse(domXMLReader);
  64         final NormalizedNode<?, ?> transformedInput = result.getResult();
  65         assertNotNull(transformedInput);
  66
  67         // serialization
  68         //final StringWriter writer = new StringWriter();
  69         final DOMResult domResult = new DOMResult(UntrustedXML.newDocumentBuilder().newDocument());
  70         final XMLOutputFactory outputFactory = XMLOutputFactory.newFactory();
  71         outputFactory.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, Boolean.TRUE);
  72         final XMLStreamWriter xmlStreamWriter = outputFactory.createXMLStreamWriter(domResult);
  73
  74         final NormalizedNodeStreamWriter xmlNormalizedNodeStreamWriter = XMLStreamNormalizedNodeStreamWriter.create(
  75                 xmlStreamWriter, schemaContext);
  76
  77         final NormalizedNodeWriter normalizedNodeWriter = NormalizedNodeWriter.forStreamWriter(
  78                 xmlNormalizedNodeStreamWriter);
  79         normalizedNodeWriter.write(transformedInput);
  80
  81         //final String serializedXml = writer.toString();
  82         final String serializedXml = toString(domResult.getNode());
  83         assertFalse(serializedXml.isEmpty());
  84     }
  85
  86     private static Document loadDocument(final String xmlPath) throws IOException, SAXException {
  87         final InputStream resourceAsStream = NormalizedNodesToXmlTest.class.getResourceAsStream(xmlPath);
  88         return requireNonNull(readXmlToDocument(resourceAsStream));
  89     }
  90
  91     private static Document readXmlToDocument(final InputStream xmlContent) throws IOException, SAXException {
  92         final Document doc = UntrustedXML.newDocumentBuilder().parse(xmlContent);
  93         doc.getDocumentElement().normalize();
  94         return doc;
  95     }
  96
  97     private static String toString(final Node xml) {
  98         try {
  99             final Transformer transformer = TransformerFactory.newInstance().newTransformer();
 100             transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 101             transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
 102
 103             final StreamResult result = new StreamResult(new StringWriter());
 104             final DOMSource source = new DOMSource(xml);
 105             transformer.transform(source, result);
 106
 107             return result.getWriter().toString();
 108         } catch (IllegalArgumentException | TransformerFactoryConfigurationError | TransformerException e) {
 109             throw new RuntimeException("Unable to serialize xml element " + xml, e);
 110         }
 111     }
 112 }