2 * Copyright (c) 2017 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
9 package org.opendaylight.mdsal.binding.javav2.java.api.generator.util;
11 import com.google.common.base.CharMatcher;
12 import com.google.common.base.Preconditions;
13 import com.google.common.base.Splitter;
14 import com.google.common.base.Strings;
15 import com.google.common.collect.Iterables;
16 import com.google.common.collect.Lists;
17 import java.util.List;
18 import java.util.Optional;
19 import java.util.StringTokenizer;
20 import java.util.function.Function;
21 import java.util.regex.Pattern;
22 import org.opendaylight.mdsal.binding.javav2.generator.util.BindingGeneratorUtil;
23 import org.opendaylight.mdsal.binding.javav2.generator.util.Types;
24 import org.opendaylight.mdsal.binding.javav2.model.api.AccessModifier;
25 import org.opendaylight.mdsal.binding.javav2.model.api.ConcreteType;
26 import org.opendaylight.mdsal.binding.javav2.model.api.GeneratedProperty;
27 import org.opendaylight.mdsal.binding.javav2.model.api.GeneratedTransferObject;
28 import org.opendaylight.mdsal.binding.javav2.model.api.GeneratedType;
29 import org.opendaylight.mdsal.binding.javav2.model.api.GeneratedTypeForBuilder;
30 import org.opendaylight.mdsal.binding.javav2.model.api.MethodSignature;
31 import org.opendaylight.mdsal.binding.javav2.model.api.Restrictions;
32 import org.opendaylight.mdsal.binding.javav2.model.api.Type;
33 import org.opendaylight.mdsal.binding.javav2.model.api.TypeComment;
34 import org.opendaylight.mdsal.binding.javav2.model.api.TypeMember;
35 import org.opendaylight.mdsal.binding.javav2.model.api.YangSourceDefinition;
36 import org.opendaylight.mdsal.binding.javav2.model.api.YangSourceDefinition.Multiple;
37 import org.opendaylight.mdsal.binding.javav2.model.api.YangSourceDefinition.Single;
38 import org.opendaylight.mdsal.binding.javav2.spec.runtime.BindingNamespaceType;
39 import org.opendaylight.yangtools.concepts.Builder;
40 import org.opendaylight.yangtools.yang.common.QName;
41 import org.opendaylight.yangtools.yang.model.api.DocumentedNode;
42 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
43 import org.opendaylight.yangtools.yang.model.api.Module;
44 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
45 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
46 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
47 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
48 import org.opendaylight.yangtools.yang.model.api.stmt.ModuleEffectiveStatement;
49 import org.opendaylight.yangtools.yang.model.export.DeclaredStatementFormatter;
51 public final class TextTemplateUtil {
53 public static final String DOT = ".";
55 private static final char NEW_LINE = '\n';
56 private static final String UNDERSCORE = "_";
57 private static final CharMatcher NEWLINE_OR_TAB = CharMatcher.anyOf("\n\t");
58 private static final CharMatcher NL_MATCHER = CharMatcher.is(NEW_LINE);
59 private static final CharMatcher AMP_MATCHER = CharMatcher.is('&');
60 private static final CharMatcher GT_MATCHER = CharMatcher.is('>');
61 private static final CharMatcher LT_MATCHER = CharMatcher.is('<');
62 private static final Splitter NL_SPLITTER = Splitter.on(NL_MATCHER);
63 private static final Splitter BSDOT_SPLITTER = Splitter.on(".");
65 private static final Pattern TAIL_COMMENT_PATTERN = Pattern.compile("*/", Pattern.LITERAL);
66 private static final Pattern MULTIPLE_SPACES_PATTERN = Pattern.compile(" +");
68 private static DeclaredStatementFormatter YANG_FORMATTER = DeclaredStatementFormatter.builder()
69 .addIgnoredStatement(YangStmtMapping.CONTACT)
70 .addIgnoredStatement(YangStmtMapping.DESCRIPTION)
71 .addIgnoredStatement(YangStmtMapping.REFERENCE)
72 .addIgnoredStatement(YangStmtMapping.ORGANIZATION)
75 private TextTemplateUtil() {
76 throw new UnsupportedOperationException("Util class");
80 * Makes start of getter name LowerCase
82 * @param s getter name without prefix
83 * @return getter name starting in LowerCase
85 public static String toFirstLower(final String s) {
86 return s != null && s.length() != 0 ? Character.isLowerCase(s.charAt(0)) ? s : s.length() == 1 ?
87 s.toLowerCase() : s.substring(0, 1).toLowerCase() + s.substring(1) : s;
91 * Wraps text as documentation, used in enum description
93 * @param text text for wrapping
94 * @return wrapped text
96 public static String wrapToDocumentation(final String text) {
100 final StringBuilder sb = new StringBuilder(NEW_LINE);
103 for (final String t : NL_SPLITTER.split(text)) {
112 return sb.toString();
116 * Returns formatted Javadoc, based on type
117 * @param typeName given type name
118 * @return formatted Javadoc, based on type
120 public static String formatDataForJavaDocBuilder(final String typeName) {
121 final StringBuilder stringBuilder = new StringBuilder();
122 stringBuilder.append("Class that builds {@link ")
124 .append("} instances.")
128 return stringBuilder.toString();
132 * Returns formatted Javadoc with possible additional comment, based on type
133 * @param type given type
134 * @param additionalComment additional comment to format
135 * @return formatted Javadoc with possible additional comment, based on type
137 public static String formatDataForJavaDoc(final GeneratedType type, final String additionalComment) {
138 final StringBuilder javaDoc = new StringBuilder();
139 javaDoc.append(formatDataForJavaDoc(type)).append(additionalComment);
140 return javaDoc.toString();
143 private static void appendSnippet(final StringBuilder sb, final GeneratedType type) {
144 Optional<YangSourceDefinition> optDef = type.getYangSourceDefinition();
145 if (optDef.isPresent()) {
146 YangSourceDefinition def = optDef.get();
149 if (def instanceof Single) {
150 DocumentedNode node = ((Single) def).getNode();
152 .append("This class represents the following YANG schema fragment defined in module <b>")
153 .append(def.getModule().argument()).append("</b>\n")
155 appendYangSnippet(sb, def.getModule(), ((EffectiveStatement<?, ?>) node).getDeclared());
158 if (node instanceof SchemaNode) {
159 sb.append("The schema path to identify an instance is\n")
161 .append(formatSchemaPath(def.getModule().argument(), ((SchemaNode) node).getPath().getPathFromRoot()))
164 if (hasBuilderClass(type)) {
165 final String builderName = new StringBuilder()
166 .append(((GeneratedTypeForBuilder) type).getPackageNameForBuilder())
167 .append(".").append(type.getName()).append("Builder").toString();
169 sb.append("\n<p>To create instances of this class use {@link ").append(builderName)
171 .append("@see ").append(builderName).append('\n');
172 if (node instanceof ListSchemaNode) {
173 final StringBuilder linkToKeyClass = new StringBuilder();
175 final String[] namespace = Iterables.toArray(
176 BSDOT_SPLITTER.split(type.getFullyQualifiedName()), String.class);
177 final String className = namespace[namespace.length - 1];
179 linkToKeyClass.append(BindingGeneratorUtil.packageNameForSubGeneratedType(
180 ((GeneratedTypeForBuilder) type).getBasePackageName(), (SchemaNode) node,
181 BindingNamespaceType.Key)).append('.').append(className).append("Key");
183 List<QName> keyDef = ((ListSchemaNode) node).getKeyDefinition();
184 if (keyDef != null && !keyDef.isEmpty()) {
185 sb.append("@see ").append(linkToKeyClass);
191 } else if (def instanceof Multiple) {
192 sb.append("<pre>\n");
193 for (SchemaNode node : ((Multiple) def).getNodes()) {
194 appendYangSnippet(sb, def.getModule(), ((EffectiveStatement<?, ?>) node).getDeclared());
196 sb.append("</pre>\n");
201 private static void appendYangSnippet(StringBuilder sb, ModuleEffectiveStatement module,
202 DeclaredStatement<?> stmt) {
203 for (String str : YANG_FORMATTER.toYangTextSnippet(module, stmt)) {
204 sb.append(encodeAngleBrackets(encodeJavadocSymbols(str)));
208 public static boolean hasBuilderClass(final GeneratedType type) {
209 return type instanceof GeneratedTypeForBuilder;
212 public static String formatSchemaPath(final String moduleName, final Iterable<QName> schemaPath) {
213 final StringBuilder sb = new StringBuilder();
214 sb.append(moduleName);
216 QName currentElement = Iterables.getFirst(schemaPath, null);
217 for (final QName pathElement : schemaPath) {
219 if (!currentElement.getNamespace().equals(pathElement.getNamespace())) {
220 currentElement = pathElement;
221 sb.append(pathElement);
223 sb.append(pathElement.getLocalName());
226 return sb.toString();
230 * Returns properties names in formatted string
231 * @param properties list of given properties
232 * @return properties names in formatted string
234 //FIXME: this needs further clarification in future patch
235 public static String valueForBits(final List<GeneratedProperty> properties) {
236 return String.join(",", Lists.transform(properties, TextTemplateUtil::fieldName));
240 * Returns formatted type description
241 * @param type given type
242 * @return formatted type description
244 public static String formatDataForJavaDoc(final GeneratedType type) {
245 final StringBuilder javaDoc = new StringBuilder();
246 final TypeComment comment = type.getComment();
247 if (comment != null) {
248 javaDoc.append(comment.getJavadoc())
254 appendSnippet(javaDoc, type);
256 return javaDoc.toString();
260 * Returns parameter name, based on given Type
261 * @param returnType given type
262 * @param paramName parameter name
263 * @return parameter name, based on given Type
265 public static String paramValue(final Type returnType, final String paramName) {
266 return returnType instanceof ConcreteType ? paramName : paramName + ".getValue()";
270 * Template method which generates JAVA comments. InterfaceTemplate
272 * @param comment comment string with the comment for whole JAVA class
273 * @return string with comment in JAVA format
275 public static String asJavadoc(final String comment) {
276 return comment == null ? "" : wrapToDocumentation(formatToParagraph(comment.trim(), 0));
279 private static String formatDataForJavaDoc(final TypeMember type, final String additionalComment) {
280 final StringBuilder javaDoc = new StringBuilder();
281 if (type.getComment() != null && !type.getComment().isEmpty()) {
282 javaDoc.append(formatToParagraph(type.getComment(), 0))
287 javaDoc.append(additionalComment);
288 return wrapToDocumentation(javaDoc.toString());
292 * Returns related Javadoc
293 * @param methodSignature method signature
294 * @return related Javadoc
296 public static String getJavaDocForInterface(final MethodSignature methodSignature) {
297 if (methodSignature.getReturnType() == Types.VOID) {
300 final StringBuilder javaDoc = new StringBuilder();
301 javaDoc.append("@return ")
302 .append(asCode(methodSignature.getReturnType().getFullyQualifiedName()))
304 .append(asCode(propertyNameFromGetter(methodSignature)))
306 .append(asCode("null"))
307 .append(" if not present");
308 return formatDataForJavaDoc(methodSignature, javaDoc.toString());
311 private static String asCode(final String text) {
312 return "<code>" + text + "</code>";
316 * Encodes angle brackets in yang statement description
317 * @param description description of a yang statement which is used to generate javadoc comments
318 * @return string with encoded angle brackets
320 public static String encodeAngleBrackets(String description) {
321 if (description != null) {
322 description = LT_MATCHER.replaceFrom(description, "<");
323 description = GT_MATCHER.replaceFrom(description, ">");
329 * Returns collection of properties as formatted String
330 * @param properties list of given properties
331 * @return generated properties as formatted String
333 public static String propsAsArgs(final Iterable<GeneratedProperty> properties) {
334 return String.join(",", Iterables.transform(properties, prop -> "\"" + prop.getName() + "\""));
338 * Returns properties as formatted String
339 * @param properties list of given properties
340 * @param booleanName Java Boolean type name
341 * @return Properties as formatted String
343 public static String propsAsList(final Iterable<GeneratedProperty> properties, final String booleanName) {
344 return String.join(",", Iterables.transform(properties,
345 prop -> "properties.get(i++).equals(defaultValue) ? " + booleanName + ".TRUE : null"));
349 * Extracts available restrictions from given type
350 * @param currentType given type
351 * @return restrictions from given type
353 public static Restrictions getRestrictions(final Type currentType) {
354 Restrictions restrictions = null;
355 if (currentType instanceof ConcreteType) {
356 restrictions = ((ConcreteType) currentType).getRestrictions();
357 } else if (currentType instanceof GeneratedTransferObject) {
358 restrictions = ((GeneratedTransferObject) currentType).getRestrictions();
364 * sets fieldname according to property for return type
365 * method(type fieldname)
367 * @param property type from getter
368 * @return underscored string form
370 public static String fieldName(final GeneratedProperty property) {
371 final String name = Preconditions.checkNotNull(property.getName());
372 return UNDERSCORE.concat(name);
376 * Template method which generates sequence of the names of the class attributes.
378 * @param parameters group of generated property instances which are transformed to the sequence of parameter names
379 * @return string with the list of the parameter names
381 public static String asArguments(final List<GeneratedProperty> parameters) {
382 return String.join(", ", Lists.transform(parameters, TextTemplateUtil::fieldName));
386 * Helper method for building getter.
388 * @param field property name
389 * @return getter for property
391 public static String getterMethodName(final GeneratedProperty field) {
392 final Type type = Preconditions.checkNotNull(field.getReturnType());
393 final String name = Preconditions.checkNotNull(field.getName());
394 final String prefix = Types.BOOLEAN.equals(type) ? "is" : "get";
395 return prefix.concat(toFirstUpper(name));
399 * Returns built setter method body from input parameters.
400 * @param field generated property
401 * @param typeName type name
402 * @param returnTypeName return type name
403 * @return built setter method body
405 public static String setterMethod(final GeneratedProperty field, final String typeName, final String returnTypeName) {
406 final StringBuilder stringBuilder = new StringBuilder();
407 stringBuilder.append("public ")
410 .append(toFirstUpper(field.getName()))
412 .append(returnTypeName)
413 .append(" value) {\n this.")
414 .append(fieldName(field))
415 .append(" = value;\n return this;\n}\n");
416 return stringBuilder.toString();
420 * Returns simple name of underlying class
421 * @return Simple name of underlying class
423 public static String getSimpleNameForBuilder() {
424 return Builder.class.getSimpleName();
428 * Makes start of getter name uppercase
430 * @param s getter name without prefix
431 * @return getter name starting in uppercase
433 public static String toFirstUpper(final String s) {
434 return s != null && s.length() != 0 ? Character.isUpperCase(s.charAt(0)) ? s : s.length() == 1 ?
435 s.toUpperCase() : s.substring(0, 1).toUpperCase() + s.substring(1) : s;
439 * Cuts prefix from getter name.
441 * @param getter getter name
442 * @return getter name without prefix
444 public static String propertyNameFromGetter(final MethodSignature getter) {
445 final String name = Preconditions.checkNotNull(getter.getName());
447 if (name.startsWith("is")) {
449 } else if (name.startsWith("get")) {
454 return toFirstLower(name.substring(prefix));
458 * Returns list of properties as formatted String.
459 * @param properties input list of generated properties
460 * @return formatted property list as String
462 public static String getPropertyList(final List<GeneratedProperty> properties) {
463 return String.join(", ", Lists.transform(properties, prop -> "base." + getterMethodName(prop) + "()"));
467 * util method for unionTemplateBuilderTemplate
468 * @return string with clarification for javadoc
470 public static String getClarification() {
471 final StringBuilder clarification = new StringBuilder();
472 clarification.append("The purpose of generated class in src/main/java for Union types is to create new instances of unions from a string representation.\n")
473 .append("In some cases it is very difficult to automate it since there can be unions such as (uint32 - uint16), or (string - uint32).\n")
475 .append("The reason behind putting it under src/main/java is:\n")
476 .append("This class is generated in form of a stub and needs to be finished by the user. This class is generated only once to prevent\n")
477 .append("loss of user code.\n")
479 return clarification.toString();
483 * Returns source path as String.
484 * @param module module
485 * @param moduleFilePathResolver function module to module file path
486 * @return formatted String source path
488 public static String getSourcePath(final Module module, final Function<Module, Optional<String>> moduleFilePathResolver) {
489 final java.util.Optional<String> moduleFilePath = moduleFilePathResolver.apply(module);
490 Preconditions.checkArgument(moduleFilePath.isPresent(),"Module file path for %s is not present", module);
492 return moduleFilePath.get();
496 * Util method for unionTemplateBuilderTemplate.
497 * @param modifier enum representing Java access modifier
498 * @return needed access modifier
500 public static String getAccessModifier(final AccessModifier modifier) {
502 case PUBLIC: return "public ";
503 case PROTECTED: return "protected ";
504 case PRIVATE: return "private ";
510 * @param text Content of tag description
511 * @param nextLineIndent Number of spaces from left side default is 12
512 * @return formatted description
514 private static String formatToParagraph(final String text, final int nextLineIndent) {
515 if (Strings.isNullOrEmpty(text)) {
518 boolean isFirstElementOnNewLineEmptyChar = false;
519 final StringBuilder sb = new StringBuilder();
520 final StringBuilder lineBuilder = new StringBuilder();
521 final String lineIndent = Strings.repeat(" ", nextLineIndent);
522 final String textToFormat = NEWLINE_OR_TAB.removeFrom(encodeJavadocSymbols(text));
523 final String formattedText = MULTIPLE_SPACES_PATTERN.matcher(textToFormat).replaceAll(" ");
524 final StringTokenizer tokenizer = new StringTokenizer(formattedText, " ", true);
526 while (tokenizer.hasMoreElements()) {
527 final String nextElement = tokenizer.nextElement().toString();
529 if (lineBuilder.length() + nextElement.length() > 80) {
530 // Trim trailing whitespace
531 for (int i = lineBuilder.length() - 1; i >= 0 && lineBuilder.charAt(i) != ' '; --i) {
532 lineBuilder.setLength(i);
534 // Trim leading whitespace
535 while (lineBuilder.charAt(0) == ' ') {
536 lineBuilder.deleteCharAt(0);
538 sb.append(lineBuilder).append('\n');
539 lineBuilder.setLength(0);
541 if (nextLineIndent > 0) {
542 sb.append(lineIndent);
545 if (" ".equals(nextElement)) {
546 isFirstElementOnNewLineEmptyChar = true;
549 if (isFirstElementOnNewLineEmptyChar) {
550 isFirstElementOnNewLineEmptyChar = false;
552 lineBuilder.append(nextElement);
555 return sb.append(lineBuilder).append('\n').toString();
558 private static String encodeJavadocSymbols(final String description) {
559 return Strings.isNullOrEmpty(description) ? description
560 : AMP_MATCHER.replaceFrom(TAIL_COMMENT_PATTERN.matcher(description).replaceAll("*/"), "&");