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.SchemaPath;
27 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
28 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
33 final class SingleModuleYinStatementWriter implements StatementTextWriter {
35 private final XMLStreamWriter writer;
36 private final URI currentModuleNs;
37 private final BiMap<String, URI> prefixToNamespace;
38 private StatementDefinition currentStatement;
40 private SingleModuleYinStatementWriter(final XMLStreamWriter writer, final URI moduleNamespace,
41 final Map<String, URI> prefixToNs) {
43 this.currentModuleNs = moduleNamespace;
44 this.prefixToNamespace = HashBiMap.create(prefixToNs);
45 initializeYinNamespaceInXml();
48 private void initializeYinNamespaceInXml() {
50 final String defaultNs = writer.getNamespaceContext().getNamespaceURI(XMLConstants.NULL_NS_URI);
51 if (defaultNs == null) {
52 writer.setDefaultNamespace(YangConstants.RFC6020_YIN_NAMESPACE.toString());
53 } else if (!YangConstants.RFC6020_YIN_NAMESPACE.toString().equals(defaultNs)) {
54 // FIXME: Implement support for exporting YIN as part of other XML document.
55 throw new UnsupportedOperationException(
56 "Not implemented support for nesting YIN in different XML element.");
58 } catch (final XMLStreamException e) {
59 throw new IllegalStateException(e);
63 static StatementTextWriter create(final XMLStreamWriter writer, final URI moduleNs,
64 final Map<String, URI> prefixToNs) {
65 return new SingleModuleYinStatementWriter(writer, moduleNs, prefixToNs);
69 public void startStatement(final StatementDefinition statement) {
70 currentStatement = Preconditions.checkNotNull(statement);
72 writeStartXmlElement(statement.getStatementName());
73 if (YangStmtMapping.MODULE.equals(statement) || YangStmtMapping.SUBMODULE.equals(statement)) {
74 declareXmlNamespaces();
76 } catch (final XMLStreamException e) {
77 // FIXME: Introduce proper expression
78 throw new IllegalStateException(e);
83 public void endStatement() {
84 currentStatement = null;
87 } catch (final XMLStreamException e) {
88 // FIXME: Introduce proper expression
89 throw new IllegalStateException(e);
94 public void writeArgument(final String strRep) {
95 checkArgumentApplicable();
96 writeArgument0(strRep);
100 public void writeArgument(final QName value) {
101 checkArgumentApplicable();
102 final String valueStr = toPrefixedString(value);
103 writeArgument0(valueStr);
107 public void writeArgument(final SchemaPath targetPath) {
108 checkArgumentApplicable();
109 final StringBuilder valueStr = new StringBuilder();
110 if (targetPath.isAbsolute()) {
111 valueStr.append("/");
113 final Iterator<QName> argIt = targetPath.getPathFromRoot().iterator();
114 while (argIt.hasNext()) {
115 valueStr.append(toPrefixedString(argIt.next()));
116 if (argIt.hasNext()) {
117 valueStr.append("/");
120 writeArgument0(valueStr.toString());
124 public void writeArgument(final RevisionAwareXPath xpath) {
125 checkArgumentApplicable();
126 // FIXME: This implementation assumes prefixes are unchanged
127 // and were not changed in schema context.
128 writeArgument0(xpath.toString());
131 private void writeArgument0(final String strRep) {
133 if (isArgumentYinElement(currentStatement)) {
134 writeStartXmlElement(currentStatement.getArgumentName());
135 writeXmlText(strRep);
136 writeXmlEndElement();
138 writeXmlArgument(currentStatement.getArgumentName(), strRep);
140 } catch (final XMLStreamException e) {
141 // FIXME: throw proper exception
142 throw new IllegalStateException(e);
146 private static boolean isArgumentYinElement(final StatementDefinition currentStatement) {
147 if (currentStatement instanceof YangStmtMapping || currentStatement instanceof ExtensionStatement) {
148 return currentStatement.isArgumentYinElement();
153 private void checkArgumentApplicable() {
154 Preconditions.checkState(currentStatement != null, "No statement is opened.");
155 Preconditions.checkState(currentStatement.getArgumentName() != null, "Statement %s does not take argument.",
156 currentStatement.getArgumentName());
159 private static String toPrefixedString(@Nullable final String prefix, final String localName) {
160 if (prefix == null || prefix.isEmpty()) {
163 return prefix + ":" + localName;
166 private String toPrefixedString(final QName value) {
167 final URI valueNs = value.getNamespace();
168 final String valueLocal = value.getLocalName();
169 if (currentModuleNs.equals(valueNs)) {
172 final String prefix = ensureAndGetXmlNamespacePrefix(valueNs);
173 return toPrefixedString(prefix, valueLocal);
176 private @Nullable String ensureAndGetXmlNamespacePrefix(final URI namespace) {
177 if (YangConstants.RFC6020_YANG_NAMESPACE.equals(namespace)) {
178 // YANG namespace does not have prefix if used in arguments.
182 String prefix = writer.getNamespaceContext().getPrefix(namespace.toString());
183 if (prefix == null) {
184 // FIXME: declare prefix
185 prefix = prefixToNamespace.inverse().get(namespace);
187 if (prefix == null) {
188 throw new IllegalArgumentException("Namespace " + namespace + " is not bound to imported prefixes.");
193 private void writeXmlText(final String strRep) throws XMLStreamException {
194 writer.writeCharacters(strRep);
197 private void declareXmlNamespaces() {
199 writer.writeDefaultNamespace(YangConstants.RFC6020_YIN_NAMESPACE.toString());
200 for (final Entry<String, URI> nsDeclaration : prefixToNamespace.entrySet()) {
201 writer.writeNamespace(nsDeclaration.getKey(), nsDeclaration.getValue().toString());
203 } catch (final XMLStreamException e) {
204 throw new IllegalStateException(e);
208 private void writeXmlEndElement() throws XMLStreamException {
209 writer.writeEndElement();
212 private void writeXmlArgument(final QName qname, final String value) throws XMLStreamException {
213 writer.writeAttribute(qname.getNamespace().toString(), qname.getLocalName(), value);
216 private void writeStartXmlElement(final QName name) throws XMLStreamException {
217 writer.writeStartElement(name.getNamespace().toString(), name.getLocalName());