001 /*
002 * Copyright 2010-2015 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.kotlin.codegen;
018
019 import com.intellij.openapi.util.Pair;
020 import com.intellij.psi.PsiElement;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.annotations.Nullable;
023 import org.jetbrains.kotlin.codegen.annotation.AnnotatedSimple;
024 import org.jetbrains.kotlin.codegen.annotation.AnnotatedWithFakeAnnotations;
025 import org.jetbrains.kotlin.codegen.context.*;
026 import org.jetbrains.kotlin.codegen.state.GenerationState;
027 import org.jetbrains.kotlin.codegen.state.JetTypeMapper;
028 import org.jetbrains.kotlin.descriptors.*;
029 import org.jetbrains.kotlin.descriptors.annotations.Annotated;
030 import org.jetbrains.kotlin.descriptors.annotations.AnnotationSplitter;
031 import org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget;
032 import org.jetbrains.kotlin.descriptors.annotations.Annotations;
033 import org.jetbrains.kotlin.load.java.JvmAbi;
034 import org.jetbrains.kotlin.psi.*;
035 import org.jetbrains.kotlin.psi.psiUtil.PsiUtilsKt;
036 import org.jetbrains.kotlin.resolve.BindingContext;
037 import org.jetbrains.kotlin.resolve.DescriptorFactory;
038 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
039 import org.jetbrains.kotlin.resolve.annotations.AnnotationUtilKt;
040 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
041 import org.jetbrains.kotlin.resolve.constants.ConstantValue;
042 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOriginKt;
043 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature;
044 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedPropertyDescriptor;
045 import org.jetbrains.kotlin.storage.LockBasedStorageManager;
046 import org.jetbrains.kotlin.types.ErrorUtils;
047 import org.jetbrains.kotlin.types.KotlinType;
048 import org.jetbrains.org.objectweb.asm.FieldVisitor;
049 import org.jetbrains.org.objectweb.asm.MethodVisitor;
050 import org.jetbrains.org.objectweb.asm.Opcodes;
051 import org.jetbrains.org.objectweb.asm.Type;
052 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
053 import org.jetbrains.org.objectweb.asm.commons.Method;
054
055 import java.util.List;
056
057 import static org.jetbrains.kotlin.codegen.AsmUtil.*;
058 import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isJvmInterface;
059 import static org.jetbrains.kotlin.codegen.serialization.JvmSerializationBindings.*;
060 import static org.jetbrains.kotlin.resolve.DescriptorUtils.*;
061 import static org.jetbrains.kotlin.resolve.jvm.AsmTypes.K_PROPERTY_TYPE;
062 import static org.jetbrains.kotlin.resolve.jvm.annotations.AnnotationUtilKt.hasJvmFieldAnnotation;
063 import static org.jetbrains.org.objectweb.asm.Opcodes.*;
064
065 public class PropertyCodegen {
066 private final GenerationState state;
067 private final ClassBuilder v;
068 private final FunctionCodegen functionCodegen;
069 private final JetTypeMapper typeMapper;
070 private final BindingContext bindingContext;
071 private final FieldOwnerContext context;
072 private final MemberCodegen<?> memberCodegen;
073 private final OwnerKind kind;
074
075 public PropertyCodegen(
076 @NotNull FieldOwnerContext context,
077 @NotNull ClassBuilder v,
078 @NotNull FunctionCodegen functionCodegen,
079 @NotNull MemberCodegen<?> memberCodegen
080 ) {
081 this.state = functionCodegen.state;
082 this.v = v;
083 this.functionCodegen = functionCodegen;
084 this.typeMapper = state.getTypeMapper();
085 this.bindingContext = state.getBindingContext();
086 this.context = context;
087 this.memberCodegen = memberCodegen;
088 this.kind = context.getContextKind();
089 }
090
091 public void gen(@NotNull KtProperty property) {
092 VariableDescriptor variableDescriptor = bindingContext.get(BindingContext.VARIABLE, property);
093 assert variableDescriptor instanceof PropertyDescriptor : "Property " + property.getText() + " should have a property descriptor: " + variableDescriptor;
094
095 PropertyDescriptor propertyDescriptor = (PropertyDescriptor) variableDescriptor;
096 gen(property, propertyDescriptor, property.getGetter(), property.getSetter());
097 }
098
099 public void generateInPackageFacade(@NotNull DeserializedPropertyDescriptor deserializedProperty) {
100 assert context instanceof DelegatingFacadeContext : "should be called only for generating facade: " + context;
101 gen(null, deserializedProperty, null, null);
102 }
103
104 private void gen(
105 @Nullable KtProperty declaration,
106 @NotNull PropertyDescriptor descriptor,
107 @Nullable KtPropertyAccessor getter,
108 @Nullable KtPropertyAccessor setter
109 ) {
110 assert kind == OwnerKind.PACKAGE || kind == OwnerKind.IMPLEMENTATION || kind == OwnerKind.DEFAULT_IMPLS
111 : "Generating property with a wrong kind (" + kind + "): " + descriptor;
112
113 String implClassName = CodegenContextUtil.getImplementationClassShortName(context);
114 if (implClassName != null) {
115 v.getSerializationBindings().put(IMPL_CLASS_NAME_FOR_CALLABLE, descriptor, implClassName);
116 }
117
118 if (CodegenContextUtil.isImplClassOwner(context)) {
119 assert declaration != null : "Declaration is null for different context: " + context;
120
121 genBackingFieldAndAnnotations(declaration, descriptor, false);
122 }
123
124 if (isAccessorNeeded(declaration, descriptor, getter)) {
125 generateGetter(declaration, descriptor, getter);
126 }
127 if (isAccessorNeeded(declaration, descriptor, setter)) {
128 generateSetter(declaration, descriptor, setter);
129 }
130 }
131
132 private void genBackingFieldAndAnnotations(@NotNull KtNamedDeclaration declaration, @NotNull PropertyDescriptor descriptor, boolean isParameter) {
133 boolean hasBackingField = hasBackingField(declaration, descriptor);
134
135 AnnotationSplitter annotationSplitter =
136 AnnotationSplitter.create(LockBasedStorageManager.NO_LOCKS,
137 descriptor.getAnnotations(),
138 AnnotationSplitter.getTargetSet(isParameter, descriptor.isVar(), hasBackingField));
139
140 Annotations fieldAnnotations = annotationSplitter.getAnnotationsForTarget(AnnotationUseSiteTarget.FIELD);
141 Annotations propertyAnnotations = annotationSplitter.getAnnotationsForTarget(AnnotationUseSiteTarget.PROPERTY);
142
143 generateBackingField(declaration, descriptor, fieldAnnotations);
144 generateSyntheticMethodIfNeeded(descriptor, propertyAnnotations);
145 }
146
147 /**
148 * Determines if it's necessary to generate an accessor to the property, i.e. if this property can be referenced via getter/setter
149 * for any reason
150 *
151 * @see JvmCodegenUtil#couldUseDirectAccessToProperty
152 */
153 private boolean isAccessorNeeded(
154 @Nullable KtProperty declaration,
155 @NotNull PropertyDescriptor descriptor,
156 @Nullable KtPropertyAccessor accessor
157 ) {
158 if (hasJvmFieldAnnotation(descriptor)) return false;
159
160 boolean isDefaultAccessor = accessor == null || !accessor.hasBody();
161
162 // Don't generate accessors for interface properties with default accessors in DefaultImpls
163 if (kind == OwnerKind.DEFAULT_IMPLS && isDefaultAccessor) return false;
164
165 if (declaration == null) return true;
166
167 // Delegated or extension properties can only be referenced via accessors
168 if (declaration.hasDelegate() || declaration.getReceiverTypeReference() != null) return true;
169
170 // Companion object properties always should have accessors, because their backing fields are moved/copied to the outer class
171 if (isCompanionObject(descriptor.getContainingDeclaration())) return true;
172
173 // Private class properties have accessors only in cases when those accessors are non-trivial
174 if (Visibilities.isPrivate(descriptor.getVisibility())) {
175 return !isDefaultAccessor;
176 }
177
178 return true;
179 }
180
181 private static boolean areAccessorsNeededForPrimaryConstructorProperty(
182 @NotNull PropertyDescriptor descriptor
183 ) {
184 if (hasJvmFieldAnnotation(descriptor)) return false;
185
186 return !Visibilities.isPrivate(descriptor.getVisibility());
187 }
188
189 public void generatePrimaryConstructorProperty(@NotNull KtParameter p, @NotNull PropertyDescriptor descriptor) {
190 genBackingFieldAndAnnotations(p, descriptor, true);
191
192 if (areAccessorsNeededForPrimaryConstructorProperty(descriptor)) {
193 generateGetter(p, descriptor, null);
194 generateSetter(p, descriptor, null);
195 }
196 }
197
198 public void generateConstructorPropertyAsMethodForAnnotationClass(KtParameter p, PropertyDescriptor descriptor) {
199 JvmMethodSignature signature = typeMapper.mapAnnotationParameterSignature(descriptor);
200 String name = p.getName();
201 if (name == null) return;
202 MethodVisitor mv = v.newMethod(
203 JvmDeclarationOriginKt.OtherOrigin(p, descriptor), ACC_PUBLIC | ACC_ABSTRACT, name,
204 signature.getAsmMethod().getDescriptor(),
205 signature.getGenericsSignature(),
206 null
207 );
208
209 KtExpression defaultValue = p.getDefaultValue();
210 if (defaultValue != null) {
211 ConstantValue<?> constant = ExpressionCodegen.getCompileTimeConstant(defaultValue, bindingContext);
212 assert state.getClassBuilderMode() != ClassBuilderMode.FULL || constant != null
213 : "Default value for annotation parameter should be compile time value: " + defaultValue.getText();
214 if (constant != null) {
215 AnnotationCodegen annotationCodegen = AnnotationCodegen.forAnnotationDefaultValue(mv, typeMapper);
216 annotationCodegen.generateAnnotationDefaultValue(constant, descriptor.getType());
217 }
218 }
219
220 mv.visitEnd();
221 }
222
223 private boolean hasBackingField(@NotNull KtNamedDeclaration p, @NotNull PropertyDescriptor descriptor) {
224 return !isJvmInterface(descriptor.getContainingDeclaration()) &&
225 kind != OwnerKind.DEFAULT_IMPLS &&
226 !Boolean.FALSE.equals(bindingContext.get(BindingContext.BACKING_FIELD_REQUIRED, descriptor));
227 }
228
229 private boolean generateBackingField(
230 @NotNull KtNamedDeclaration p,
231 @NotNull PropertyDescriptor descriptor,
232 @NotNull Annotations annotations
233 ) {
234 if (isJvmInterface(descriptor.getContainingDeclaration()) || kind == OwnerKind.DEFAULT_IMPLS) {
235 return false;
236 }
237
238 if (p instanceof KtProperty && ((KtProperty) p).hasDelegate()) {
239 generatePropertyDelegateAccess((KtProperty) p, descriptor, annotations);
240 }
241 else if (Boolean.TRUE.equals(bindingContext.get(BindingContext.BACKING_FIELD_REQUIRED, descriptor))) {
242 generateBackingFieldAccess(p, descriptor, annotations);
243 }
244 else {
245 return false;
246 }
247 return true;
248 }
249
250 // Annotations on properties are stored in bytecode on an empty synthetic method. This way they're still
251 // accessible via reflection, and 'deprecated' and 'private' flags prevent this method from being called accidentally
252 private void generateSyntheticMethodIfNeeded(@NotNull PropertyDescriptor descriptor, Annotations annotations) {
253 if (annotations.getAllAnnotations().isEmpty()) return;
254
255 ReceiverParameterDescriptor receiver = descriptor.getExtensionReceiverParameter();
256 String name = JvmAbi.getSyntheticMethodNameForAnnotatedProperty(descriptor.getName());
257 String desc = receiver == null ? "()V" : "(" + typeMapper.mapType(receiver.getType()) + ")V";
258
259 if (!isInterface(context.getContextDescriptor()) || kind == OwnerKind.DEFAULT_IMPLS) {
260 int flags = ACC_DEPRECATED | ACC_FINAL | ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC;
261 MethodVisitor mv = v.newMethod(JvmDeclarationOriginKt.OtherOrigin(descriptor), flags, name, desc, null, null);
262 AnnotationCodegen.forMethod(mv, typeMapper)
263 .genAnnotations(new AnnotatedSimple(annotations), Type.VOID_TYPE, AnnotationUseSiteTarget.PROPERTY);
264 mv.visitCode();
265 mv.visitInsn(Opcodes.RETURN);
266 mv.visitEnd();
267 }
268 else {
269 Type tImplType = typeMapper.mapDefaultImpls((ClassDescriptor) context.getContextDescriptor());
270 v.getSerializationBindings().put(IMPL_CLASS_NAME_FOR_CALLABLE, descriptor, shortNameByAsmType(tImplType));
271 }
272
273 if (kind != OwnerKind.DEFAULT_IMPLS) {
274 v.getSerializationBindings().put(SYNTHETIC_METHOD_FOR_PROPERTY, descriptor, new Method(name, desc));
275 }
276 }
277
278 private void generateBackingField(
279 KtNamedDeclaration element,
280 PropertyDescriptor propertyDescriptor,
281 boolean isDelegate,
282 KotlinType jetType,
283 Object defaultValue,
284 Annotations annotations
285 ) {
286 int modifiers = getDeprecatedAccessFlag(propertyDescriptor);
287
288 for (AnnotationCodegen.JvmFlagAnnotation flagAnnotation : AnnotationCodegen.FIELD_FLAGS) {
289 if (flagAnnotation.hasAnnotation(propertyDescriptor.getOriginal())) {
290 modifiers |= flagAnnotation.getJvmFlag();
291 }
292 }
293
294 if (kind == OwnerKind.PACKAGE) {
295 modifiers |= ACC_STATIC;
296 }
297
298 if (!propertyDescriptor.isLateInit() && (!propertyDescriptor.isVar() || isDelegate)) {
299 modifiers |= ACC_FINAL;
300 }
301
302 if (AnnotationUtilKt.hasJvmSyntheticAnnotation(propertyDescriptor)) {
303 modifiers |= ACC_SYNTHETIC;
304 }
305
306 Type type = typeMapper.mapType(jetType);
307
308 ClassBuilder builder = v;
309
310 boolean hasJvmFieldAnnotation = hasJvmFieldAnnotation(propertyDescriptor);
311
312 FieldOwnerContext backingFieldContext = context;
313 boolean takeVisibilityFromDescriptor = propertyDescriptor.isLateInit() || propertyDescriptor.isConst();
314 if (AsmUtil.isInstancePropertyWithStaticBackingField(propertyDescriptor) ) {
315 modifiers |= ACC_STATIC;
316
317 if (takeVisibilityFromDescriptor) {
318 modifiers |= getVisibilityAccessFlag(propertyDescriptor);
319 }
320 else if (hasJvmFieldAnnotation && !isDelegate) {
321 modifiers |= getDefaultVisibilityFlag(propertyDescriptor.getVisibility());
322 }
323 else {
324 modifiers |= getVisibilityForSpecialPropertyBackingField(propertyDescriptor, isDelegate);
325 }
326
327 if (AsmUtil.isPropertyWithBackingFieldInOuterClass(propertyDescriptor)) {
328 ImplementationBodyCodegen codegen = (ImplementationBodyCodegen) memberCodegen.getParentCodegen();
329 builder = codegen.v;
330 backingFieldContext = codegen.context;
331 v.getSerializationBindings().put(STATIC_FIELD_IN_OUTER_CLASS, propertyDescriptor);
332 }
333
334 if (isObject(propertyDescriptor.getContainingDeclaration()) &&
335 !hasJvmFieldAnnotation &&
336 !propertyDescriptor.isConst() &&
337 (modifiers & ACC_PRIVATE) == 0) {
338 modifiers |= ACC_DEPRECATED;
339 }
340 }
341 else if (takeVisibilityFromDescriptor) {
342 modifiers |= getVisibilityAccessFlag(propertyDescriptor);
343 }
344 else if (!isDelegate && hasJvmFieldAnnotation) {
345 modifiers |= getDefaultVisibilityFlag(propertyDescriptor.getVisibility());
346 }
347 else {
348 modifiers |= ACC_PRIVATE;
349 }
350
351 if (AsmUtil.isPropertyWithBackingFieldCopyInOuterClass(propertyDescriptor)) {
352 ImplementationBodyCodegen parentBodyCodegen = (ImplementationBodyCodegen) memberCodegen.getParentCodegen();
353 parentBodyCodegen.addCompanionObjectPropertyToCopy(propertyDescriptor, defaultValue);
354 }
355
356 String name = backingFieldContext.getFieldName(propertyDescriptor, isDelegate);
357
358 v.getSerializationBindings().put(FIELD_FOR_PROPERTY, propertyDescriptor, Pair.create(type, name));
359
360 FieldVisitor fv = builder.newField(JvmDeclarationOriginKt.OtherOrigin(element, propertyDescriptor), modifiers, name, type.getDescriptor(),
361 typeMapper.mapFieldSignature(jetType, propertyDescriptor), defaultValue);
362
363 Annotated fieldAnnotated = new AnnotatedWithFakeAnnotations(propertyDescriptor, annotations);
364 AnnotationCodegen.forField(fv, typeMapper).genAnnotations(fieldAnnotated, type, AnnotationUseSiteTarget.FIELD);
365 }
366
367 private void generatePropertyDelegateAccess(KtProperty p, PropertyDescriptor propertyDescriptor, Annotations annotations) {
368 KtExpression delegateExpression = p.getDelegateExpression();
369 KotlinType delegateType = delegateExpression != null ? bindingContext.getType(p.getDelegateExpression()) : null;
370 if (delegateType == null) {
371 // If delegate expression is unresolved reference
372 delegateType = ErrorUtils.createErrorType("Delegate type");
373 }
374
375 generateBackingField(p, propertyDescriptor, true, delegateType, null, annotations);
376 }
377
378 private void generateBackingFieldAccess(KtNamedDeclaration p, PropertyDescriptor propertyDescriptor, Annotations annotations) {
379 Object value = null;
380
381 if (shouldWriteFieldInitializer(propertyDescriptor)) {
382 ConstantValue<?> initializer = propertyDescriptor.getCompileTimeInitializer();
383 if (initializer != null) {
384 value = initializer.getValue();
385 }
386 }
387
388 generateBackingField(p, propertyDescriptor, false, propertyDescriptor.getType(), value, annotations);
389 }
390
391 private boolean shouldWriteFieldInitializer(@NotNull PropertyDescriptor descriptor) {
392 //final field of primitive or String type
393 if (!descriptor.isVar()) {
394 Type type = typeMapper.mapType(descriptor);
395 return AsmUtil.isPrimitive(type) || "java.lang.String".equals(type.getClassName());
396 }
397 return false;
398 }
399
400 private void generateGetter(@Nullable KtNamedDeclaration p, @NotNull PropertyDescriptor descriptor, @Nullable KtPropertyAccessor getter) {
401 generateAccessor(p, getter, descriptor.getGetter() != null
402 ? descriptor.getGetter()
403 : DescriptorFactory.createDefaultGetter(descriptor, Annotations.Companion.getEMPTY()));
404 }
405
406 private void generateSetter(@Nullable KtNamedDeclaration p, @NotNull PropertyDescriptor descriptor, @Nullable KtPropertyAccessor setter) {
407 if (!descriptor.isVar()) return;
408
409 generateAccessor(p, setter, descriptor.getSetter() != null
410 ? descriptor.getSetter()
411 : DescriptorFactory.createDefaultSetter(descriptor, Annotations.Companion.getEMPTY()));
412 }
413
414 private void generateAccessor(
415 @Nullable KtNamedDeclaration p,
416 @Nullable KtPropertyAccessor accessor,
417 @NotNull PropertyAccessorDescriptor accessorDescriptor
418 ) {
419 if (context instanceof MultifileClassFacadeContext && Visibilities.isPrivate(accessorDescriptor.getVisibility())) {
420 return;
421 }
422
423 FunctionGenerationStrategy strategy;
424 if (accessor == null || !accessor.hasBody()) {
425 if (p instanceof KtProperty && ((KtProperty) p).hasDelegate()) {
426 strategy = new DelegatedPropertyAccessorStrategy(state, accessorDescriptor, indexOfDelegatedProperty((KtProperty) p));
427 }
428 else {
429 strategy = new DefaultPropertyAccessorStrategy(state, accessorDescriptor);
430 }
431 }
432 else {
433 strategy = new FunctionGenerationStrategy.FunctionDefault(state, accessorDescriptor, accessor);
434 }
435
436 functionCodegen.generateMethod(JvmDeclarationOriginKt.OtherOrigin(accessor != null ? accessor : p, accessorDescriptor), accessorDescriptor, strategy);
437 }
438
439 public static int indexOfDelegatedProperty(@NotNull KtProperty property) {
440 PsiElement parent = property.getParent();
441 KtDeclarationContainer container;
442 if (parent instanceof KtClassBody) {
443 container = ((KtClassOrObject) parent.getParent());
444 }
445 else if (parent instanceof KtFile) {
446 container = (KtFile) parent;
447 }
448 else {
449 throw new UnsupportedOperationException("Unknown delegated property container: " + parent);
450 }
451
452 int index = 0;
453 for (KtDeclaration declaration : container.getDeclarations()) {
454 if (declaration instanceof KtProperty && ((KtProperty) declaration).hasDelegate()) {
455 if (declaration == property) {
456 return index;
457 }
458 index++;
459 }
460 }
461
462 throw new IllegalStateException("Delegated property not found in its parent: " + PsiUtilsKt.getElementTextWithContext(property));
463 }
464
465
466 private static class DefaultPropertyAccessorStrategy extends FunctionGenerationStrategy.CodegenBased<PropertyAccessorDescriptor> {
467 public DefaultPropertyAccessorStrategy(@NotNull GenerationState state, @NotNull PropertyAccessorDescriptor descriptor) {
468 super(state, descriptor);
469 }
470
471 @Override
472 public void doGenerateBody(@NotNull ExpressionCodegen codegen, @NotNull JvmMethodSignature signature) {
473 InstructionAdapter v = codegen.v;
474 PropertyDescriptor propertyDescriptor = callableDescriptor.getCorrespondingProperty();
475 StackValue property = codegen.intermediateValueForProperty(propertyDescriptor, true, null, StackValue.LOCAL_0);
476
477 PsiElement jetProperty = DescriptorToSourceUtils.descriptorToDeclaration(propertyDescriptor);
478 if (jetProperty instanceof KtProperty || jetProperty instanceof KtParameter) {
479 codegen.markLineNumber((KtElement) jetProperty, false);
480 }
481
482 if (callableDescriptor instanceof PropertyGetterDescriptor) {
483 Type type = signature.getReturnType();
484 property.put(type, v);
485 v.areturn(type);
486 }
487 else if (callableDescriptor instanceof PropertySetterDescriptor) {
488 List<ValueParameterDescriptor> valueParameters = callableDescriptor.getValueParameters();
489 assert valueParameters.size() == 1 : "Property setter should have only one value parameter but has " + callableDescriptor;
490 int parameterIndex = codegen.lookupLocalIndex(valueParameters.get(0));
491 assert parameterIndex >= 0 : "Local index for setter parameter should be positive or zero: " + callableDescriptor;
492 Type type = codegen.typeMapper.mapType(propertyDescriptor);
493 property.store(StackValue.local(parameterIndex, type), codegen.v);
494 v.visitInsn(RETURN);
495 }
496 else {
497 throw new IllegalStateException("Unknown property accessor: " + callableDescriptor);
498 }
499 }
500 }
501
502 public static StackValue invokeDelegatedPropertyConventionMethod(
503 @NotNull PropertyDescriptor propertyDescriptor,
504 @NotNull ExpressionCodegen codegen,
505 @NotNull JetTypeMapper typeMapper,
506 @NotNull ResolvedCall<FunctionDescriptor> resolvedCall,
507 final int indexInPropertyMetadataArray,
508 int propertyMetadataArgumentIndex
509 ) {
510 CodegenContext<? extends ClassOrPackageFragmentDescriptor> ownerContext = codegen.getContext().getClassOrPackageParentContext();
511 final Type owner;
512 if (ownerContext instanceof ClassContext) {
513 owner = typeMapper.mapClass(((ClassContext) ownerContext).getContextDescriptor());
514 }
515 else if (ownerContext instanceof PackageContext) {
516 owner = ((PackageContext) ownerContext).getPackagePartType();
517 }
518 else if (ownerContext instanceof MultifileClassContextBase) {
519 owner = ((MultifileClassContextBase) ownerContext).getFilePartType();
520 }
521 else {
522 throw new UnsupportedOperationException("Unknown context: " + ownerContext);
523 }
524
525 codegen.tempVariables.put(
526 resolvedCall.getCall().getValueArguments().get(propertyMetadataArgumentIndex).asElement(),
527 new StackValue(K_PROPERTY_TYPE) {
528 @Override
529 public void putSelector(@NotNull Type type, @NotNull InstructionAdapter v) {
530 Field array = StackValue.field(
531 Type.getType("[" + K_PROPERTY_TYPE), owner, JvmAbi.DELEGATED_PROPERTIES_ARRAY_NAME, true, StackValue.none()
532 );
533 StackValue.arrayElement(
534 K_PROPERTY_TYPE, array, StackValue.constant(indexInPropertyMetadataArray, Type.INT_TYPE)
535 ).put(type, v);
536 }
537 }
538 );
539
540 StackValue delegatedProperty = codegen.intermediateValueForProperty(propertyDescriptor, true, null, StackValue.LOCAL_0);
541 return codegen.invokeFunction(resolvedCall, delegatedProperty);
542 }
543
544 private static class DelegatedPropertyAccessorStrategy extends FunctionGenerationStrategy.CodegenBased<PropertyAccessorDescriptor> {
545 private final int index;
546
547 public DelegatedPropertyAccessorStrategy(@NotNull GenerationState state, @NotNull PropertyAccessorDescriptor descriptor, int index) {
548 super(state, descriptor);
549 this.index = index;
550 }
551
552 @Override
553 public void doGenerateBody(@NotNull ExpressionCodegen codegen, @NotNull JvmMethodSignature signature) {
554 InstructionAdapter v = codegen.v;
555
556 BindingContext bindingContext = state.getBindingContext();
557 ResolvedCall<FunctionDescriptor> resolvedCall =
558 bindingContext.get(BindingContext.DELEGATED_PROPERTY_RESOLVED_CALL, callableDescriptor);
559 assert resolvedCall != null : "Resolve call should be recorded for delegate call " + signature.toString();
560
561 StackValue lastValue = invokeDelegatedPropertyConventionMethod(callableDescriptor.getCorrespondingProperty(),
562 codegen, state.getTypeMapper(), resolvedCall, index, 1);
563 Type asmType = signature.getReturnType();
564 lastValue.put(asmType, v);
565 v.areturn(asmType);
566 }
567 }
568
569 public void genDelegate(@NotNull PropertyDescriptor delegate, @NotNull PropertyDescriptor delegateTo, @NotNull StackValue field) {
570 ClassDescriptor toClass = (ClassDescriptor) delegateTo.getContainingDeclaration();
571
572 PropertyGetterDescriptor getter = delegate.getGetter();
573 if (getter != null) {
574 //noinspection ConstantConditions
575 functionCodegen.genDelegate(getter, delegateTo.getGetter().getOriginal(), toClass, field);
576 }
577
578 PropertySetterDescriptor setter = delegate.getSetter();
579 if (setter != null) {
580 //noinspection ConstantConditions
581 functionCodegen.genDelegate(setter, delegateTo.getSetter().getOriginal(), toClass, field);
582 }
583 }
584 }