2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.yangtools.yang.model.export;
10 import com.google.common.annotations.Beta;
11 import com.google.common.base.Preconditions;
12 import com.google.common.collect.BiMap;
13 import com.google.common.collect.HashBiMap;
15 import java.util.Iterator;
17 import java.util.Map.Entry;
18 import javax.annotation.Nullable;
19 import javax.annotation.concurrent.NotThreadSafe;
20 import javax.xml.XMLConstants;
21 import javax.xml.stream.XMLStreamException;
22 import javax.xml.stream.XMLStreamWriter;
23 import org.opendaylight.yangtools.yang.common.QName;
24 import org.opendaylight.yangtools.yang.common.YangConstants;
25 import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
26 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
27 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
28 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
32 class SingleModuleYinStatementWriter implements StatementTextWriter {
34 private final XMLStreamWriter writer;
35 private final URI currentModuleNs;
36 private final BiMap<String, URI> prefixToNamespace;
37 private StatementDefinition currentStatement;
39 private SingleModuleYinStatementWriter(final XMLStreamWriter writer, final URI moduleNamespace,
40 final Map<String, URI> prefixToNs) {
42 this.currentModuleNs = moduleNamespace;
43 this.prefixToNamespace = HashBiMap.create(prefixToNs);
44 initializeYinNamespaceInXml();
47 private void initializeYinNamespaceInXml() {
49 final String defaultNs = writer.getNamespaceContext().getNamespaceURI(XMLConstants.NULL_NS_URI);
50 if (defaultNs == null) {
51 writer.setDefaultNamespace(YangConstants.RFC6020_YIN_NAMESPACE.toString());
52 } else if (!YangConstants.RFC6020_YIN_NAMESPACE.toString().equals(defaultNs)) {
53 // FIXME: Implement support for exporting YIN as part of other XML document.
54 throw new UnsupportedOperationException("Not implemented support for nesting YIN in different XML element.");
56 } catch (final XMLStreamException e) {
57 throw new IllegalStateException(e);
61 static StatementTextWriter create(final XMLStreamWriter writer, final URI moduleNs,
62 final Map<String, URI> prefixToNs) {
63 return new SingleModuleYinStatementWriter(writer, moduleNs, prefixToNs);
67 public void startStatement(final StatementDefinition statement) {
68 currentStatement = Preconditions.checkNotNull(statement);
70 writeStartXmlElement(statement.getStatementName());
71 if (YangStmtMapping.MODULE.equals(statement) || YangStmtMapping.SUBMODULE.equals(statement)) {
72 declareXmlNamespaces(prefixToNamespace);
74 } catch (final XMLStreamException e) {
75 // FIXME: Introduce proper expression
76 throw new IllegalStateException(e);
81 public void endStatement() {
82 currentStatement = null;
85 } catch (final XMLStreamException e) {
86 // FIXME: Introduce proper expression
87 throw new IllegalStateException(e);
92 public void writeArgument(final String strRep) {
93 checkArgumentApplicable();
94 writeArgument0(strRep);
98 public void writeArgument(final QName value) {
99 checkArgumentApplicable();
100 final String valueStr = toPrefixedString(value);
101 writeArgument0(valueStr);
105 public void writeArgument(final SchemaPath targetPath) {
106 checkArgumentApplicable();
107 final StringBuilder valueStr = new StringBuilder();
108 if (targetPath.isAbsolute()) {
109 valueStr.append("/");
111 final Iterator<QName> argIt = targetPath.getPathFromRoot().iterator();
112 while (argIt.hasNext()) {
113 valueStr.append(toPrefixedString(argIt.next()));
114 if (argIt.hasNext()) {
115 valueStr.append("/");
118 writeArgument0(valueStr.toString());
122 public void writeArgument(final RevisionAwareXPath xpath) {
123 checkArgumentApplicable();
124 // FIXME: This implementation assumes prefixes are unchanged
125 // and were not changed in schema context.
126 writeArgument0(xpath.toString());
129 private void writeArgument0(final String strRep) {
131 if (isArgumentYinElement(currentStatement)) {
132 writeStartXmlElement(currentStatement.getArgumentName());
133 writeXmlText(strRep);
134 writeXmlEndElement();
136 writeXmlArgument(currentStatement.getArgumentName(), strRep);
138 } catch (final XMLStreamException e) {
139 // FIXME: throw proper exception
140 throw new IllegalStateException(e);
144 private static boolean isArgumentYinElement(final StatementDefinition currentStatement) {
145 if (currentStatement instanceof YangStmtMapping || currentStatement instanceof ExtensionStatement) {
146 return currentStatement.isArgumentYinElement();
151 private void checkArgumentApplicable() {
152 Preconditions.checkState(currentStatement != null, "No statement is opened.");
153 Preconditions.checkState(currentStatement.getArgumentName() != null, "Statement %s does not take argument.",
154 currentStatement.getArgumentName());
157 private static String toPrefixedString(@Nullable final String prefix, final String localName) {
158 if (prefix == null || prefix.isEmpty()) {
161 return prefix + ":" + localName;
164 private String toPrefixedString(final QName value) {
165 final URI valueNs = value.getNamespace();
166 final String valueLocal = value.getLocalName();
167 if (currentModuleNs.equals(valueNs)) {
170 final String prefix = ensureAndGetXmlNamespacePrefix(valueNs);
171 return toPrefixedString(prefix, valueLocal);
174 private @Nullable String ensureAndGetXmlNamespacePrefix(final URI namespace) {
175 if (YangConstants.RFC6020_YANG_NAMESPACE.equals(namespace)) {
176 // YANG namespace does not have prefix if used in arguments.
180 String prefix = writer.getNamespaceContext().getPrefix(namespace.toString());
181 if (prefix == null) {
182 // FIXME: declare prefix
183 prefix =prefixToNamespace.inverse().get(namespace);
185 if (prefix == null) {
186 throw new IllegalArgumentException("Namespace " + namespace + " is not bound to imported prefixes.");
191 private void writeXmlText(final String strRep) throws XMLStreamException {
192 writer.writeCharacters(strRep);
195 private void declareXmlNamespaces(final Map<String, URI> prefixToNamespace) {
197 writer.writeDefaultNamespace(YangConstants.RFC6020_YIN_NAMESPACE.toString());
198 for (final Entry<String, URI> nsDeclaration : prefixToNamespace.entrySet()) {
199 writer.writeNamespace(nsDeclaration.getKey(), nsDeclaration.getValue().toString());
201 } catch (final XMLStreamException e) {
202 throw new IllegalStateException(e);
206 private void writeXmlEndElement() throws XMLStreamException {
207 writer.writeEndElement();
210 private void writeXmlArgument(final QName qName, final String value) throws XMLStreamException {
211 writer.writeAttribute(qName.getNamespace().toString(), qName.getLocalName(), value);
214 private void writeStartXmlElement(final QName name) throws XMLStreamException {
215 writer.writeStartElement(name.getNamespace().toString(), name.getLocalName());