2 * Copyright (c) 2016 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.restconf.parser.builder;
11 import com.google.common.base.Preconditions;
13 import java.util.Iterator;
14 import java.util.Map.Entry;
15 import org.opendaylight.restconf.utils.RestconfConstants;
16 import org.opendaylight.restconf.utils.parser.builder.ParserBuilderConstants;
17 import org.opendaylight.restconf.utils.parser.builder.ParserBuilderConstants.Serializer;
18 import org.opendaylight.yangtools.yang.common.QName;
19 import org.opendaylight.yangtools.yang.common.QNameModule;
20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeWithValue;
23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
24 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextNode;
25 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextTree;
26 import org.opendaylight.yangtools.yang.model.api.Module;
27 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
30 * Serializer for {@link YangInstanceIdentifier} to {@link String} for restconf
33 public final class YangInstanceIdentifierSerializer {
35 private YangInstanceIdentifierSerializer() {
36 throw new UnsupportedOperationException("Util class.");
40 * Method to create String from {@link Iterable} of {@link PathArgument}
41 * which are parsing from data by {@link SchemaContext}
43 * @param schemaContext
44 * - for validate of parsing path arguments
47 * @return {@link String}
49 public static String create(final SchemaContext schemaContext, final YangInstanceIdentifier data) {
50 final DataSchemaContextNode<?> current = DataSchemaContextTree.from(schemaContext).getRoot();
51 final MainVarsWrapper variables = new MainVarsWrapper(current);
52 final StringBuilder path = new StringBuilder();
54 QNameModule parentModule = null;
55 for (int i = 0; i < data.getPathArguments().size(); i++) {
56 // get module of the parent
57 if (!variables.getCurrent().isMixin()) {
58 parentModule = variables.getCurrent().getDataSchemaNode().getQName().getModule();
61 final PathArgument arg = data.getPathArguments().get(i);
62 variables.setCurrent(variables.getCurrent().getChild(arg));
64 Preconditions.checkArgument(variables.getCurrent() != null,
65 "Invalid input %s: schema for argument %s (after %s) not found", data, arg, path);
67 if (variables.getCurrent().isMixin()) {
71 // append namespace before every node which is defined in other module than its parent
72 // condition is satisfied also for the first path argument
73 if (!arg.getNodeType().getModule().equals(parentModule)) {
74 // append slash if it is not the first path argument
75 if (path.length() > 0) {
76 path.append(RestconfConstants.SLASH);
79 path.append(prefixForNamespace(arg.getNodeType(), schemaContext));
80 path.append(ParserBuilderConstants.Deserializer.COLON);
82 path.append(RestconfConstants.SLASH);
85 if (arg instanceof NodeIdentifierWithPredicates) {
86 prepareNodeWithPredicates(path, arg);
87 } else if (arg instanceof NodeWithValue) {
88 prepareNodeWithValue(path, arg);
90 appendQName(path, arg.getNodeType());
94 return path.toString();
97 private static void prepareNodeWithValue(final StringBuilder path, final PathArgument arg) {
98 path.append(arg.getNodeType().getLocalName());
99 path.append(ParserBuilderConstants.Deserializer.EQUAL);
101 String value = ((NodeWithValue<String>) arg).getValue();
102 if (Serializer.PERCENT_ENCODE_CHARS.matchesAnyOf(value)) {
103 value = parsePercentEncodeChars(value);
108 private static void prepareNodeWithPredicates(final StringBuilder path, final PathArgument arg) {
109 path.append(arg.getNodeType().getLocalName());
111 final Iterator<Entry<QName, Object>> iterator = ((NodeIdentifierWithPredicates) arg).getKeyValues()
112 .entrySet().iterator();
114 if (iterator.hasNext()) {
115 path.append(ParserBuilderConstants.Deserializer.EQUAL);
118 while (iterator.hasNext()) {
119 String valueOf = String.valueOf(iterator.next().getValue());
120 if (Serializer.PERCENT_ENCODE_CHARS.matchesAnyOf(valueOf)) {
121 valueOf = parsePercentEncodeChars(valueOf);
123 path.append(valueOf);
124 if (iterator.hasNext()) {
125 path.append(ParserBuilderConstants.Deserializer.COMMA);
131 * Encode {@link Serializer#DISABLED_CHARS} chars to percent encoded chars
135 * @return encoded {@link String}
137 private static String parsePercentEncodeChars(final String valueOf) {
138 final StringBuilder sb = new StringBuilder();
140 while (start < valueOf.length()) {
141 if (Serializer.PERCENT_ENCODE_CHARS.matches(valueOf.charAt(start))) {
142 final String format = String.format("%x", (int) valueOf.charAt(start));
143 final String upperCase = format.toUpperCase();
144 sb.append(ParserBuilderConstants.Deserializer.PERCENT_ENCODING + upperCase);
146 sb.append(valueOf.charAt(start));
150 return sb.toString();
154 * Add {@link QName} to the serialized string
157 * - {@link StringBuilder}
159 * - {@link QName} node
160 * @return {@link StringBuilder}
162 private final static StringBuilder appendQName(final StringBuilder path, final QName qname) {
163 path.append(qname.getLocalName());
168 * Create prefix of namespace from {@link QName}
172 * @return {@link String}
174 private static String prefixForNamespace(final QName qname, final SchemaContext schemaContext) {
175 final URI namespace = qname.getNamespace();
176 Preconditions.checkArgument(namespace != null, "Failed to map QName {}", qname);
177 final Module module = schemaContext.findModuleByNamespaceAndRevision(namespace, qname.getRevision());
178 return module.getName();
181 private static final class MainVarsWrapper {
183 private DataSchemaContextNode<?> current;
185 public MainVarsWrapper(final DataSchemaContextNode<?> current) {
186 this.setCurrent(current);
189 public DataSchemaContextNode<?> getCurrent() {
193 public void setCurrent(final DataSchemaContextNode<?> current) {
194 this.current = current;