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", "top-cont")));
  52         assertNotNull(outerContainerSchema);
  53
  54         // deserialization
  55         final Document doc = loadDocument("/dom-reader-test/foo.xml");
  56         final DOMSource inputXml = new DOMSource(doc.getDocumentElement());
  57         XMLStreamReader domXMLReader = new DOMSourceXMLStreamReader(inputXml);
  58
  59         final NormalizedNodeResult result = new NormalizedNodeResult();
  60         final NormalizedNodeStreamWriter streamWriter = ImmutableNormalizedNodeStreamWriter.from(result);
  61         final XmlParserStream xmlParser = XmlParserStream.create(streamWriter, schemaContext, outerContainerSchema);
  62         xmlParser.parse(domXMLReader);
  63         final NormalizedNode<?, ?> transformedInput = result.getResult();
  64         assertNotNull(transformedInput);
  65
  66         // serialization
  67         //final StringWriter writer = new StringWriter();
  68         final DOMResult domResult = new DOMResult(UntrustedXML.newDocumentBuilder().newDocument());
  69         final XMLOutputFactory outputFactory = XMLOutputFactory.newFactory();
  70         outputFactory.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, Boolean.TRUE);
  71         final XMLStreamWriter xmlStreamWriter = outputFactory.createXMLStreamWriter(domResult);
  72
  73         final NormalizedNodeStreamWriter xmlNormalizedNodeStreamWriter = XMLStreamNormalizedNodeStreamWriter.create(
  74                 xmlStreamWriter, schemaContext);
  75
  76         final NormalizedNodeWriter normalizedNodeWriter = NormalizedNodeWriter.forStreamWriter(
  77                 xmlNormalizedNodeStreamWriter);
  78         normalizedNodeWriter.write(transformedInput);
  79
  80         //final String serializedXml = writer.toString();
  81         final String serializedXml = toString(domResult.getNode());
  82         assertFalse(serializedXml.isEmpty());
  83     }
  84
  85     private static Document loadDocument(final String xmlPath) throws IOException, SAXException {
  86         final InputStream resourceAsStream = NormalizedNodesToXmlTest.class.getResourceAsStream(xmlPath);
  87         return requireNonNull(readXmlToDocument(resourceAsStream));
  88     }
  89
  90     private static Document readXmlToDocument(final InputStream xmlContent) throws IOException, SAXException {
  91         final Document doc = UntrustedXML.newDocumentBuilder().parse(xmlContent);
  92         doc.getDocumentElement().normalize();
  93         return doc;
  94     }
  95
  96     private static String toString(final Node xml) {
  97         try {
  98             final Transformer transformer = TransformerFactory.newInstance().newTransformer();
  99             transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 100             transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
 101
 102             final StreamResult result = new StreamResult(new StringWriter());
 103             final DOMSource source = new DOMSource(xml);
 104             transformer.transform(source, result);
 105
 106             return result.getWriter().toString();
 107         } catch (IllegalArgumentException | TransformerFactoryConfigurationError | TransformerException e) {
 108             throw new RuntimeException("Unable to serialize xml element " + xml, e);
 109         }
 110     }
 111 }