2 * Copyright (c) 2014 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.mdsal.binding.java.api.generator
10 import static extension org.apache.commons.text.StringEscapeUtils.escapeJava
11 import static org.opendaylight.mdsal.binding.model.ri.BindingTypes.DATA_OBJECT
12 import static org.opendaylight.mdsal.binding.spec.naming.BindingMapping.AUGMENTABLE_AUGMENTATION_NAME
13 import static org.opendaylight.mdsal.binding.spec.naming.BindingMapping.AUGMENTATION_FIELD
14 import static org.opendaylight.mdsal.binding.spec.naming.BindingMapping.BINDING_CONTRACT_IMPLEMENTED_INTERFACE_NAME
16 import com.google.common.collect.ImmutableList
17 import com.google.common.collect.ImmutableSet
18 import com.google.common.collect.Sets
19 import java.util.ArrayList
20 import java.util.Collection
21 import java.util.HashSet
25 import org.opendaylight.mdsal.binding.model.api.AnnotationType
26 import org.opendaylight.mdsal.binding.model.api.GeneratedProperty
27 import org.opendaylight.mdsal.binding.model.api.GeneratedTransferObject
28 import org.opendaylight.mdsal.binding.model.api.GeneratedType
29 import org.opendaylight.mdsal.binding.model.api.JavaTypeName
30 import org.opendaylight.mdsal.binding.model.api.MethodSignature;
31 import org.opendaylight.mdsal.binding.model.api.ParameterizedType
32 import org.opendaylight.mdsal.binding.model.api.Type
33 import org.opendaylight.mdsal.binding.model.ri.TypeConstants
34 import org.opendaylight.mdsal.binding.model.ri.Types
35 import org.opendaylight.mdsal.binding.spec.naming.BindingMapping
38 * Template for generating JAVA builder classes.
40 class BuilderTemplate extends AbstractBuilderTemplate {
41 val BuilderImplTemplate implTemplate
44 * Constructs new instance of this class.
45 * @throws IllegalArgumentException if <code>genType</code> equals <code>null</code>
47 new(GeneratedType genType, GeneratedType targetType, Type keyType) {
48 super(genType, targetType, keyType)
49 implTemplate = new BuilderImplTemplate(this, type.enclosedTypes.get(0))
52 override isLocalInnerClass(JavaTypeName name) {
53 // Builders do not have inner types
58 * Template method which generates JAVA class body for builder class and for IMPL class.
60 * @return string with JAVA source code
63 «wrapToDocumentation(formatDataForJavaDoc(targetType))»
64 «targetType.annotations.generateDeprecatedAnnotation»
66 public class «type.name» {
68 «generateFields(false)»
70 «constantsDeclarations()»
72 «IF augmentType !== null»
73 «generateAugmentField()»
76 «generateConstructorsFromIfcs()»
78 public «generateCopyConstructor(targetType, type.enclosedTypes.get(0))»
80 «generateMethodFieldsFrom()»
82 «generateGetters(false)»
83 «IF augmentType !== null»
85 «generateAugmentation()»
91 * A new {@link «targetType.name»} instance.
93 * @return A new {@link «targetType.name»} instance.
95 public «targetType.name» build() {
96 return new «type.enclosedTypes.get(0).importedName»(this);
103 override generateDeprecatedAnnotation(AnnotationType ann) {
104 val forRemoval = ann.getParameter("forRemoval")
105 if (forRemoval !== null) {
106 return "@" + DEPRECATED.importedName + "(forRemoval = " + forRemoval.value + ")"
108 return "@" + SUPPRESS_WARNINGS.importedName + "(\"deprecation\")"
112 * Generate default constructor and constructor for every implemented interface from uses statements.
114 def private generateConstructorsFromIfcs() '''
115 public «type.name»() {
118 «IF (!(targetType instanceof GeneratedTransferObject))»
119 «FOR impl : targetType.implements SEPARATOR "\n"»
120 «generateConstructorFromIfc(impl)»
126 * Generate constructor with argument of given type.
128 def private Object generateConstructorFromIfc(Type impl) '''
129 «IF (impl instanceof GeneratedType)»
130 «IF impl.hasNonDefaultMethods»
131 public «type.name»(«impl.importedName» arg) {
132 «printConstructorPropertySetter(impl)»
135 «FOR implTypeImplement : impl.implements»
136 «generateConstructorFromIfc(implTypeImplement)»
141 def private Object printConstructorPropertySetter(Type implementedIfc) '''
142 «IF (implementedIfc instanceof GeneratedType && !(implementedIfc instanceof GeneratedTransferObject))»
143 «val ifc = implementedIfc as GeneratedType»
144 «FOR getter : ifc.nonDefaultMethods»
145 «IF BindingMapping.isGetterMethodName(getter.name)»
146 «val propertyName = getter.propertyNameFromGetter»
147 «printPropertySetter(getter, '''arg.«getter.name»()''', propertyName)»;
150 «FOR impl : ifc.implements»
151 «printConstructorPropertySetter(impl, getSpecifiedGetters(ifc))»
156 def private Object printConstructorPropertySetter(Type implementedIfc, Set<MethodSignature> alreadySetProperties) '''
157 «IF (implementedIfc instanceof GeneratedType && !(implementedIfc instanceof GeneratedTransferObject))»
158 «val ifc = implementedIfc as GeneratedType»
159 «FOR getter : ifc.nonDefaultMethods»
160 «IF BindingMapping.isGetterMethodName(getter.name) && getterByName(alreadySetProperties, getter.name).isEmpty»
161 «val propertyName = getter.propertyNameFromGetter»
162 «printPropertySetter(getter, '''arg.«getter.name»()''', propertyName)»;
165 «FOR descendant : ifc.implements»
166 «printConstructorPropertySetter(descendant, Sets.union(alreadySetProperties, getSpecifiedGetters(ifc)))»
171 def static Set<MethodSignature> getSpecifiedGetters(GeneratedType type) {
172 val ImmutableSet.Builder<MethodSignature> setBuilder = new ImmutableSet.Builder
173 for (MethodSignature method : type.getMethodDefinitions()) {
174 if (method.hasOverrideAnnotation) {
175 setBuilder.add(method)
178 return setBuilder.build()
182 * Generate 'fieldsFrom' method to set builder properties based on type of given argument.
184 def private generateMethodFieldsFrom() '''
185 «IF (!(targetType instanceof GeneratedTransferObject))»
186 «IF targetType.hasImplementsFromUses»
187 «val List<Type> done = targetType.getBaseIfcs»
188 «generateMethodFieldsFromComment(targetType)»
189 public void fieldsFrom(«DATA_OBJECT.importedName» arg) {
190 boolean isValidArg = false;
191 «FOR impl : targetType.getAllIfcs»
192 «generateIfCheck(impl, done)»
194 «CODEHELPERS.importedName».validValue(isValidArg, arg, "«targetType.getAllIfcs.toListOfNames»");
200 def private generateMethodFieldsFromComment(GeneratedType type) '''
202 * Set fields from given grouping argument. Valid argument is instance of one of following types:
204 «FOR impl : type.getAllIfcs»
205 * <li>«impl.importedName»</li>
209 * @param arg grouping object
210 * @throws IllegalArgumentException if given argument is none of valid types or has property with incompatible value
215 * Method is used to find out if given type implements any interface from uses.
217 def boolean hasImplementsFromUses(GeneratedType type) {
219 for (impl : type.getAllIfcs) {
220 if (impl instanceof GeneratedType && (impl as GeneratedType).hasNonDefaultMethods) {
227 def private generateIfCheck(Type impl, List<Type> done) '''
228 «IF (impl instanceof GeneratedType && (impl as GeneratedType).hasNonDefaultMethods)»
229 «val implType = impl as GeneratedType»
230 if (arg instanceof «implType.importedName») {
231 «printPropertySetter(implType)»
237 def private printPropertySetter(Type implementedIfc) '''
238 «IF (implementedIfc instanceof GeneratedType && !(implementedIfc instanceof GeneratedTransferObject))»
239 «val ifc = implementedIfc as GeneratedType»
240 «FOR getter : ifc.nonDefaultMethods»
241 «IF BindingMapping.isGetterMethodName(getter.name) && !hasOverrideAnnotation(getter)»
242 «printPropertySetter(getter, '''((«ifc.importedName»)arg).«getter.name»()''', getter.propertyNameFromGetter)»;
248 def private printPropertySetter(MethodSignature getter, String retrieveProperty, String propertyName) {
249 val ownGetter = implTemplate.findGetter(getter.name)
250 val ownGetterType = ownGetter.returnType
251 if (Types.strictTypeEquals(getter.returnType, ownGetterType)) {
252 return "this._" + propertyName + " = " + retrieveProperty
254 if (ownGetterType instanceof ParameterizedType) {
255 val itemType = ownGetterType.actualTypeArguments.get(0)
256 if (Types.isListType(ownGetterType)) {
257 return printPropertySetter(retrieveProperty, propertyName, "checkListFieldCast", itemType.importedName)
259 if (Types.isSetType(ownGetterType)) {
260 return printPropertySetter(retrieveProperty, propertyName, "checkSetFieldCast", itemType.importedName)
263 return printPropertySetter(retrieveProperty, propertyName, "checkFieldCast", ownGetterType.importedName)
266 def private printPropertySetter(String retrieveProperty, String propertyName, String checkerName, String className) '''
267 this._«propertyName» = «CODEHELPERS.importedName».«checkerName»(«className».class, "«propertyName»", «retrieveProperty»)'''
269 private def List<Type> getBaseIfcs(GeneratedType type) {
270 val List<Type> baseIfcs = new ArrayList();
271 for (ifc : type.implements) {
272 if (ifc instanceof GeneratedType && (ifc as GeneratedType).hasNonDefaultMethods) {
279 private def Set<Type> getAllIfcs(Type type) {
280 val Set<Type> baseIfcs = new HashSet()
281 if (type instanceof GeneratedType && !(type instanceof GeneratedTransferObject)) {
282 val ifc = type as GeneratedType
283 for (impl : ifc.implements) {
284 if (impl instanceof GeneratedType && (impl as GeneratedType).hasNonDefaultMethods) {
287 baseIfcs.addAll(impl.getAllIfcs)
293 private def List<String> toListOfNames(Collection<Type> types) {
294 val List<String> names = new ArrayList
296 names.add(type.importedName)
301 def private constantsDeclarations() '''
302 «FOR c : type.getConstantDefinitions»
303 «IF c.getName.startsWith(TypeConstants.PATTERN_CONSTANT_NAME)»
304 «val cValue = c.value as Map<String, String>»
305 «val String fieldSuffix = c.getName.substring(TypeConstants.PATTERN_CONSTANT_NAME.length)»
306 «val jurPatternRef = JUR_PATTERN.importedName»
307 «IF cValue.size == 1»
308 «val firstEntry = cValue.entrySet.iterator.next»
309 private static final «jurPatternRef» «Constants.MEMBER_PATTERN_LIST»«fieldSuffix» = «jurPatternRef».compile("«firstEntry.key.escapeJava»");
310 private static final String «Constants.MEMBER_REGEX_LIST»«fieldSuffix» = "«firstEntry.value.escapeJava»";
312 private static final «jurPatternRef»[] «Constants.MEMBER_PATTERN_LIST»«fieldSuffix» = «CODEHELPERS.importedName».compilePatterns(«ImmutableList.importedName».of(
313 «FOR v : cValue.keySet SEPARATOR ", "»"«v.escapeJava»"«ENDFOR»));
314 private static final String[] «Constants.MEMBER_REGEX_LIST»«fieldSuffix» = { «
315 FOR v : cValue.values SEPARATOR ", "»"«v.escapeJava»"«ENDFOR» };
323 def private generateSetter(GeneratedProperty field) {
324 val returnType = field.returnType
325 if (returnType instanceof ParameterizedType) {
326 if (Types.isListType(returnType) || Types.isSetType(returnType)) {
327 val arguments = returnType.actualTypeArguments
328 if (arguments.isEmpty) {
329 return generateListSetter(field, Types.objectType)
331 return generateListSetter(field, arguments.get(0))
332 } else if (Types.isMapType(returnType)) {
333 return generateMapSetter(field, returnType.actualTypeArguments.get(1))
336 return generateSimpleSetter(field, returnType)
339 def private generateListSetter(GeneratedProperty field, Type actualType) '''
340 «val restrictions = restrictionsForSetter(actualType)»
341 «IF restrictions !== null»
342 «generateCheckers(field, restrictions, actualType)»
344 public «type.getName» set«field.getName.toFirstUpper»(final «field.returnType.importedName» values) {
345 «IF restrictions !== null»
346 if (values != null) {
347 for («actualType.importedName» value : values) {
348 «checkArgument(field, restrictions, actualType, "value")»
352 this.«field.fieldName» = values;
358 def private generateMapSetter(GeneratedProperty field, Type actualType) '''
359 «val restrictions = restrictionsForSetter(actualType)»
360 «IF restrictions !== null»
361 «generateCheckers(field, restrictions, actualType)»
363 public «type.getName» set«field.name.toFirstUpper»(final «field.returnType.importedName» values) {
364 «IF restrictions !== null»
365 if (values != null) {
366 for («actualType.importedName» value : values.values()) {
367 «checkArgument(field, restrictions, actualType, "value")»
371 this.«field.fieldName» = values;
376 def private generateSimpleSetter(GeneratedProperty field, Type actualType) '''
377 «val restrictions = restrictionsForSetter(actualType)»
378 «IF restrictions !== null»
380 «generateCheckers(field, restrictions, actualType)»
383 «val setterName = "set" + field.getName.toFirstUpper»
384 public «type.getName» «setterName»(final «field.returnType.importedName» value) {
385 «IF restrictions !== null»
387 «checkArgument(field, restrictions, actualType, "value")»
390 this.«field.fieldName» = value;
396 * Template method which generates setter methods
398 * @return string with the setter methods
400 def private generateSetters() '''
401 «IF keyType !== null»
402 public «type.getName» withKey(final «keyType.importedName» key) {
407 «FOR property : properties»
408 «generateSetter(property)»
411 «IF augmentType !== null»
412 «val augmentTypeRef = augmentType.importedName»
413 «val jlClassRef = CLASS.importedName»
414 «val hashMapRef = JU_HASHMAP.importedName»
416 * Add an augmentation to this builder's product.
418 * @param augmentation augmentation to be added
419 * @return this builder
420 * @throws NullPointerException if {@code augmentation} is null
422 public «type.name» addAugmentation(«augmentTypeRef» augmentation) {
423 «jlClassRef»<? extends «augmentTypeRef»> augmentationType = augmentation.«BINDING_CONTRACT_IMPLEMENTED_INTERFACE_NAME»();
424 if (!(this.«AUGMENTATION_FIELD» instanceof «hashMapRef»)) {
425 this.«AUGMENTATION_FIELD» = new «hashMapRef»<>();
428 this.«AUGMENTATION_FIELD».put(augmentationType, augmentation);
433 * Remove an augmentation from this builder's product. If this builder does not track such an augmentation
434 * type, this method does nothing.
436 * @param augmentationType augmentation type to be removed
437 * @return this builder
439 public «type.name» removeAugmentation(«jlClassRef»<? extends «augmentTypeRef»> augmentationType) {
440 if (this.«AUGMENTATION_FIELD» instanceof «hashMapRef») {
441 this.«AUGMENTATION_FIELD».remove(augmentationType);
448 private def createDescription(GeneratedType targetType) {
449 val target = targetType.importedName
451 Class that builds {@link «target»} instances. Overall design of the class is that of a
452 <a href="https://en.wikipedia.org/wiki/Fluent_interface">fluent interface</a>, where method chaining is used.
455 In general, this class is supposed to be used like this template:
458 «target» create«target»(int fooXyzzy, int barBaz) {
459 return new «target»Builder()
460 .setFoo(new FooBuilder().setXyzzy(fooXyzzy).build())
461 .setBar(new BarBuilder().setBaz(barBaz).build())
468 This pattern is supported by the immutable nature of «target», as instances can be freely passed around without
469 worrying about synchronization issues.
472 As a side note: method chaining results in:
474 <li>very efficient Java bytecode, as the method invocation result, in this case the Builder reference, is
475 on the stack, so further method invocations just need to fill method arguments for the next method
476 invocation, which is terminated by {@link #build()}, which is then returned from the method</li>
477 <li>better understanding by humans, as the scope of mutable state (the builder) is kept to a minimum and is
479 <li>better optimization opportunities, as the object scope is minimized in terms of invocation (rather than
480 method) stack, making <a href="https://en.wikipedia.org/wiki/Escape_analysis">escape analysis</a> a lot
481 easier. Given enough compiler (JIT/AOT) prowess, the cost of th builder object can be completely
489 override protected String formatDataForJavaDoc(GeneratedType type) {
490 val typeDescription = createDescription(type)
493 «IF !typeDescription.nullOrEmpty»
499 private def generateAugmentation() '''
500 @«SUPPRESS_WARNINGS.importedName»({ "unchecked", "checkstyle:methodTypeParameterName"})
501 public <E$$ extends «augmentType.importedName»> E$$ «AUGMENTABLE_AUGMENTATION_NAME»(«CLASS.importedName»<E$$> augmentationType) {
502 return (E$$) «AUGMENTATION_FIELD».get(«JU_OBJECTS.importedName».requireNonNull(augmentationType));
506 override protected generateCopyKeys(List<GeneratedProperty> keyProps) '''
507 this.key = base.«BindingMapping.IDENTIFIABLE_KEY_NAME»();
508 «FOR field : keyProps»
509 this.«field.fieldName» = base.«field.getterMethodName»();
513 override protected CharSequence generateCopyNonKeys(Collection<BuilderGeneratedProperty> props) '''
515 this.«field.fieldName» = base.«field.getterName»();
519 override protected generateCopyAugmentation(Type implType) {
520 val hashMapRef = JU_HASHMAP.importedName
521 val augmentTypeRef = augmentType.importedName
523 «JU_MAP.importedName»<«CLASS.importedName»<? extends «augmentTypeRef»>, «augmentTypeRef»> aug = base.augmentations();
524 if (!aug.isEmpty()) {
525 this.«AUGMENTATION_FIELD» = new «hashMapRef»<>(aug);