2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2018 Huawei Technologies Co., Ltd. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.onap.ccsdk.sli.plugins.yangserializers.dfserializer;
23 import org.dom4j.Element;
24 import org.onap.ccsdk.sli.core.sli.SvcLogicException;
25 import org.onap.ccsdk.sli.plugins.yangserializers.pnserializer.Namespace;
26 import org.onap.ccsdk.sli.plugins.yangserializers.pnserializer.PropertiesNode;
27 import org.opendaylight.yangtools.yang.model.api.Module;
28 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
29 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
30 import org.w3c.dom.Document;
31 import org.xml.sax.InputSource;
32 import org.xml.sax.SAXException;
34 import javax.xml.parsers.DocumentBuilder;
35 import javax.xml.parsers.DocumentBuilderFactory;
36 import javax.xml.parsers.ParserConfigurationException;
37 import javax.xml.transform.Transformer;
38 import javax.xml.transform.TransformerException;
39 import javax.xml.transform.TransformerFactory;
40 import javax.xml.transform.dom.DOMSource;
41 import javax.xml.transform.stream.StreamResult;
42 import java.io.IOException;
43 import java.io.StringReader;
44 import java.io.StringWriter;
45 import java.io.Writer;
47 import java.net.URISyntaxException;
48 import java.util.Iterator;
50 import static javax.xml.transform.OutputKeys.INDENT;
51 import static org.onap.ccsdk.sli.plugins.yangserializers.dfserializer.XmlNodeType.OBJECT_NODE;
52 import static org.onap.ccsdk.sli.plugins.yangserializers.dfserializer.XmlNodeType.TEXT_NODE;
53 import static org.onap.ccsdk.sli.plugins.yangserializers.pnserializer.MdsalPropertiesNodeUtils.getRevision;
56 * Utilities for data format serializer.
58 public final class DfSerializerUtil {
60 static final String JSON_WRITE_ERR = "Unable to write to JSON from " +
63 static final String NODE_TYPE_ERR = "The node type %s is not supported.";
65 static final String JSON_LIS_ERR = "The JSON serializer doesn't have " +
68 static final String XML_LIS_ERR = "The XML serializer doesn't have XML " +
71 static final String JSON_TREE_ERR = "Unable to form JSON tree object from" +
72 " the JSON body provided.";
74 static final String XML_TREE_ERR = "Unable to form XML tree object from " +
75 "the XML body provided.";
77 static final String FORMAT_ERR = "Only JSON and XML formats are supported" +
78 ". %s is not supported";
80 static final String PROP_NODE_ERR = "The property node doesn't have " +
81 "schema node bound to it.";
83 static final String DF_ERR = "Type mismatch for the node %s. The schema " +
84 "node does not match with the data format node type %s.";
86 static final String UTF_HEADER = "<?xml version=\"1.0\" " +
87 "encoding=\"UTF-8\"?>";
89 static final String XML_PREFIX = "yangid";
91 private static final String YES = "yes";
93 private static final String INDENT_XMLNS = "{http://xml.apache" +
94 ".org/xslt}indent-amount";
96 private static final String XML_PARSE_ERR = "Unable to parse the xml to " +
99 private static final String URI_ERR = "Unable to parse the URI";
102 private DfSerializerUtil() {
106 * Returns the writer which contains the pretty formatted XML string.
108 * @param input input XML
109 * @param indent indentation level
110 * @return writer with XML
111 * @throws SvcLogicException when transformation of source fails
113 static Writer getXmlWriter(String input, String indent)
114 throws SvcLogicException {
116 Transformer transformer = TransformerFactory.newInstance()
118 transformer.setOutputProperty(INDENT, YES);
119 transformer.setOutputProperty(INDENT_XMLNS, indent);
120 StreamResult result = new StreamResult(new StringWriter());
121 DOMSource source = new DOMSource(parseXml(input));
122 transformer.transform(source, result);
123 return result.getWriter();
124 } catch (TransformerException e) {
125 throw new SvcLogicException(XML_PARSE_ERR + input, e);
130 * Parses the XML and converts it into dom document which can be used for
131 * formatting the XML.
133 * @param in input XML
134 * @return dom document of XML
135 * @throws SvcLogicException when document building fails
137 private static Document parseXml(String in) throws SvcLogicException {
138 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
141 db = dbf.newDocumentBuilder();
142 InputSource is = new InputSource(new StringReader(in));
144 } catch (SAXException | IOException | ParserConfigurationException e) {
145 throw new SvcLogicException(XML_PARSE_ERR + in, e);
150 * Returns the resolved namespace object from the input received from the
151 * abstract data format.
153 * @param mName module name
154 * @param mUri module URI
155 * @param ctx schema context
156 * @param parent parent properties node
158 * @throws SvcLogicException when resolving namespace fails
160 static Namespace getResolvedNamespace(String mName, String mUri,
162 PropertiesNode parent)
163 throws SvcLogicException {
164 if (mName == null && mUri == null) {
165 Namespace parentNs = parent.namespace();
166 return new Namespace(parentNs.moduleName(), parentNs.moduleNs(),
167 parentNs.revision());
173 it = ctx.findModules(mName).iterator();
177 modUri = new URI(mUri);
178 } catch (URISyntaxException e) {
179 throw new SvcLogicException(URI_ERR, e);
181 it = ctx.findModules(modUri).iterator();
189 return new Namespace(mod.getName(), mod.getQNameModule().getNamespace(),
190 getRevision(mod.getRevision()));
194 * Returns the node type of a XML element.
196 * @param element XML element
197 * @return node type of the XML element
199 static XmlNodeType getXmlNodeType(Element element) {
200 Element newElement = element.createCopy();
201 newElement.remove(element.getNamespace());
202 return newElement.hasContent() && newElement.isTextOnly() ?
203 TEXT_NODE : OBJECT_NODE;
207 * Resolves the super type to the base type from type definition.
209 * @param type super type
210 * @return base type definition
212 static TypeDefinition<?> resolveBaseTypeFrom(TypeDefinition<?> type) {
213 TypeDefinition superType = type;
214 while (superType.getBaseType() != null) {
215 superType = superType.getBaseType();