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.PROPERTY_METADATA_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 boolean hasBackingField = hasBackingField(declaration, descriptor);
122
123 AnnotationSplitter annotationSplitter = AnnotationSplitter.create(LockBasedStorageManager.NO_LOCKS,
124 descriptor.getAnnotations(), AnnotationSplitter.getTargetSet(false, descriptor.isVar(), hasBackingField));
125
126 Annotations fieldAnnotations = annotationSplitter.getAnnotationsForTarget(AnnotationUseSiteTarget.FIELD);
127 Annotations propertyAnnotations = annotationSplitter.getAnnotationsForTarget(AnnotationUseSiteTarget.PROPERTY);
128
129 generateBackingField(declaration, descriptor, fieldAnnotations);
130 generateSyntheticMethodIfNeeded(descriptor, propertyAnnotations);
131 }
132
133 if (isAccessorNeeded(declaration, descriptor, getter)) {
134 generateGetter(declaration, descriptor, getter);
135 }
136 if (isAccessorNeeded(declaration, descriptor, setter)) {
137 generateSetter(declaration, descriptor, setter);
138 }
139
140 context.recordSyntheticAccessorIfNeeded(descriptor, bindingContext);
141 }
142
143 /**
144 * Determines if it's necessary to generate an accessor to the property, i.e. if this property can be referenced via getter/setter
145 * for any reason
146 *
147 * @see JvmCodegenUtil#couldUseDirectAccessToProperty
148 */
149 private boolean isAccessorNeeded(
150 @Nullable KtProperty declaration,
151 @NotNull PropertyDescriptor descriptor,
152 @Nullable KtPropertyAccessor accessor
153 ) {
154 if (hasJvmFieldAnnotation(descriptor)) return false;
155
156 boolean isDefaultAccessor = accessor == null || !accessor.hasBody();
157
158 // Don't generate accessors for interface properties with default accessors in DefaultImpls
159 if (kind == OwnerKind.DEFAULT_IMPLS && isDefaultAccessor) return false;
160
161 if (declaration == null) return true;
162
163 // Delegated or extension properties can only be referenced via accessors
164 if (declaration.hasDelegate() || declaration.getReceiverTypeReference() != null) return true;
165
166 // Companion object properties always should have accessors, because their backing fields are moved/copied to the outer class
167 if (isCompanionObject(descriptor.getContainingDeclaration())) return true;
168
169 // Private class properties have accessors only in cases when those accessors are non-trivial
170 if (Visibilities.isPrivate(descriptor.getVisibility())) {
171 return !isDefaultAccessor;
172 }
173
174 return true;
175 }
176
177 public void generatePrimaryConstructorProperty(KtParameter p, PropertyDescriptor descriptor) {
178 AnnotationSplitter annotationSplitter = AnnotationSplitter.create(LockBasedStorageManager.NO_LOCKS,
179 descriptor.getAnnotations(), AnnotationSplitter.getTargetSet(true, descriptor.isVar(), hasBackingField(p, descriptor)));
180
181 Annotations fieldAnnotations = annotationSplitter.getAnnotationsForTarget(AnnotationUseSiteTarget.FIELD);
182 Annotations propertyAnnotations = annotationSplitter.getAnnotationsForTarget(AnnotationUseSiteTarget.PROPERTY);
183
184 generateBackingField(p, descriptor, fieldAnnotations);
185 generateSyntheticMethodIfNeeded(descriptor, propertyAnnotations);
186
187 if (!Visibilities.isPrivate(descriptor.getVisibility())) {
188 generateGetter(p, descriptor, null);
189 if (descriptor.isVar()) {
190 generateSetter(p, descriptor, null);
191 }
192 }
193 }
194
195 public void generateConstructorPropertyAsMethodForAnnotationClass(KtParameter p, PropertyDescriptor descriptor) {
196 JvmMethodSignature signature = typeMapper.mapAnnotationParameterSignature(descriptor);
197 String name = p.getName();
198 if (name == null) return;
199 MethodVisitor mv = v.newMethod(
200 JvmDeclarationOriginKt.OtherOrigin(p, descriptor), ACC_PUBLIC | ACC_ABSTRACT, name,
201 signature.getAsmMethod().getDescriptor(),
202 signature.getGenericsSignature(),
203 null
204 );
205
206 if (state.getClassBuilderMode() == ClassBuilderMode.FULL) {
207 KtExpression defaultValue = p.getDefaultValue();
208 if (defaultValue != null) {
209 ConstantValue<?> constant = ExpressionCodegen.getCompileTimeConstant(defaultValue, bindingContext);
210 assert constant != null : "Default value for annotation parameter should be compile time value: " + defaultValue.getText();
211 AnnotationCodegen annotationCodegen = AnnotationCodegen.forAnnotationDefaultValue(mv, typeMapper);
212 annotationCodegen.generateAnnotationDefaultValue(constant, descriptor.getType());
213 }
214 }
215
216 mv.visitEnd();
217 }
218
219 private boolean hasBackingField(@NotNull KtNamedDeclaration p, @NotNull PropertyDescriptor descriptor) {
220 return !isJvmInterface(descriptor.getContainingDeclaration()) &&
221 kind != OwnerKind.DEFAULT_IMPLS &&
222 !Boolean.FALSE.equals(bindingContext.get(BindingContext.BACKING_FIELD_REQUIRED, descriptor));
223 }
224
225 private boolean generateBackingField(
226 @NotNull KtNamedDeclaration p,
227 @NotNull PropertyDescriptor descriptor,
228 @NotNull Annotations annotations
229 ) {
230 if (isJvmInterface(descriptor.getContainingDeclaration()) || kind == OwnerKind.DEFAULT_IMPLS) {
231 return false;
232 }
233
234 if (p instanceof KtProperty && ((KtProperty) p).hasDelegate()) {
235 generatePropertyDelegateAccess((KtProperty) p, descriptor, annotations);
236 }
237 else if (Boolean.TRUE.equals(bindingContext.get(BindingContext.BACKING_FIELD_REQUIRED, descriptor))) {
238 generateBackingFieldAccess(p, descriptor, annotations);
239 }
240 else {
241 return false;
242 }
243 return true;
244 }
245
246 // Annotations on properties are stored in bytecode on an empty synthetic method. This way they're still
247 // accessible via reflection, and 'deprecated' and 'private' flags prevent this method from being called accidentally
248 private void generateSyntheticMethodIfNeeded(@NotNull PropertyDescriptor descriptor, Annotations annotations) {
249 if (annotations.getAllAnnotations().isEmpty()) return;
250
251 ReceiverParameterDescriptor receiver = descriptor.getExtensionReceiverParameter();
252 String name = JvmAbi.getSyntheticMethodNameForAnnotatedProperty(descriptor.getName());
253 String desc = receiver == null ? "()V" : "(" + typeMapper.mapType(receiver.getType()) + ")V";
254
255 if (!isInterface(context.getContextDescriptor()) || kind == OwnerKind.DEFAULT_IMPLS) {
256 int flags = ACC_DEPRECATED | ACC_FINAL | ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC;
257 MethodVisitor mv = v.newMethod(JvmDeclarationOriginKt.OtherOrigin(descriptor), flags, name, desc, null, null);
258 AnnotationCodegen.forMethod(mv, typeMapper)
259 .genAnnotations(new AnnotatedSimple(annotations), Type.VOID_TYPE, AnnotationUseSiteTarget.PROPERTY);
260 mv.visitCode();
261 mv.visitInsn(Opcodes.RETURN);
262 mv.visitEnd();
263 }
264 else {
265 Type tImplType = typeMapper.mapDefaultImpls((ClassDescriptor) context.getContextDescriptor());
266 v.getSerializationBindings().put(IMPL_CLASS_NAME_FOR_CALLABLE, descriptor, shortNameByAsmType(tImplType));
267 }
268
269 if (kind != OwnerKind.DEFAULT_IMPLS) {
270 v.getSerializationBindings().put(SYNTHETIC_METHOD_FOR_PROPERTY, descriptor, new Method(name, desc));
271 }
272 }
273
274 private void generateBackingField(
275 KtNamedDeclaration element,
276 PropertyDescriptor propertyDescriptor,
277 boolean isDelegate,
278 KotlinType jetType,
279 Object defaultValue,
280 Annotations annotations
281 ) {
282 int modifiers = getDeprecatedAccessFlag(propertyDescriptor);
283
284 for (AnnotationCodegen.JvmFlagAnnotation flagAnnotation : AnnotationCodegen.FIELD_FLAGS) {
285 if (flagAnnotation.hasAnnotation(propertyDescriptor.getOriginal())) {
286 modifiers |= flagAnnotation.getJvmFlag();
287 }
288 }
289
290 if (kind == OwnerKind.PACKAGE) {
291 modifiers |= ACC_STATIC;
292 }
293
294 if (!propertyDescriptor.isLateInit() && (!propertyDescriptor.isVar() || isDelegate)) {
295 modifiers |= ACC_FINAL;
296 }
297
298 if (AnnotationUtilKt.hasJvmSyntheticAnnotation(propertyDescriptor)) {
299 modifiers |= ACC_SYNTHETIC;
300 }
301
302 Type type = typeMapper.mapType(jetType);
303
304 ClassBuilder builder = v;
305
306 boolean hasJvmFieldAnnotation = hasJvmFieldAnnotation(propertyDescriptor);
307
308 FieldOwnerContext backingFieldContext = context;
309 boolean takeVisibilityFromDescriptor = propertyDescriptor.isLateInit() || propertyDescriptor.isConst();
310 if (AsmUtil.isInstancePropertyWithStaticBackingField(propertyDescriptor) ) {
311 modifiers |= ACC_STATIC;
312
313 if (takeVisibilityFromDescriptor) {
314 modifiers |= getVisibilityAccessFlag(propertyDescriptor);
315 }
316 else if (hasJvmFieldAnnotation && !isDelegate) {
317 modifiers |= getDefaultVisibilityFlag(propertyDescriptor.getVisibility());
318 }
319 else {
320 modifiers |= getVisibilityForSpecialPropertyBackingField(propertyDescriptor, isDelegate);
321 }
322
323 if (AsmUtil.isPropertyWithBackingFieldInOuterClass(propertyDescriptor)) {
324 ImplementationBodyCodegen codegen = (ImplementationBodyCodegen) memberCodegen.getParentCodegen();
325 builder = codegen.v;
326 backingFieldContext = codegen.context;
327 v.getSerializationBindings().put(STATIC_FIELD_IN_OUTER_CLASS, propertyDescriptor);
328 }
329
330 if (isObject(propertyDescriptor.getContainingDeclaration()) &&
331 !hasJvmFieldAnnotation &&
332 !propertyDescriptor.isConst() &&
333 (modifiers & ACC_PRIVATE) == 0) {
334 modifiers |= ACC_DEPRECATED;
335 }
336 }
337 else if (takeVisibilityFromDescriptor) {
338 modifiers |= getVisibilityAccessFlag(propertyDescriptor);
339 }
340 else if (!isDelegate && hasJvmFieldAnnotation) {
341 modifiers |= getDefaultVisibilityFlag(propertyDescriptor.getVisibility());
342 }
343 else {
344 modifiers |= ACC_PRIVATE;
345 }
346
347 if (AsmUtil.isPropertyWithBackingFieldCopyInOuterClass(propertyDescriptor)) {
348 ImplementationBodyCodegen parentBodyCodegen = (ImplementationBodyCodegen) memberCodegen.getParentCodegen();
349 parentBodyCodegen.addCompanionObjectPropertyToCopy(propertyDescriptor, defaultValue);
350 }
351
352 String name = backingFieldContext.getFieldName(propertyDescriptor, isDelegate);
353
354 v.getSerializationBindings().put(FIELD_FOR_PROPERTY, propertyDescriptor, Pair.create(type, name));
355
356 FieldVisitor fv = builder.newField(JvmDeclarationOriginKt.OtherOrigin(element, propertyDescriptor), modifiers, name, type.getDescriptor(),
357 typeMapper.mapFieldSignature(jetType), defaultValue);
358
359 Annotated fieldAnnotated = new AnnotatedWithFakeAnnotations(propertyDescriptor, annotations);
360 AnnotationCodegen.forField(fv, typeMapper).genAnnotations(fieldAnnotated, type, AnnotationUseSiteTarget.FIELD);
361 }
362
363 private void generatePropertyDelegateAccess(KtProperty p, PropertyDescriptor propertyDescriptor, Annotations annotations) {
364 KtExpression delegateExpression = p.getDelegateExpression();
365 KotlinType delegateType = delegateExpression != null ? bindingContext.getType(p.getDelegateExpression()) : null;
366 if (delegateType == null) {
367 // If delegate expression is unresolved reference
368 delegateType = ErrorUtils.createErrorType("Delegate type");
369 }
370
371 generateBackingField(p, propertyDescriptor, true, delegateType, null, annotations);
372 }
373
374 private void generateBackingFieldAccess(KtNamedDeclaration p, PropertyDescriptor propertyDescriptor, Annotations annotations) {
375 Object value = null;
376
377 if (shouldWriteFieldInitializer(propertyDescriptor)) {
378 ConstantValue<?> initializer = propertyDescriptor.getCompileTimeInitializer();
379 if (initializer != null) {
380 value = initializer.getValue();
381 }
382 }
383
384 generateBackingField(p, propertyDescriptor, false, propertyDescriptor.getType(), value, annotations);
385 }
386
387 private boolean shouldWriteFieldInitializer(@NotNull PropertyDescriptor descriptor) {
388 //final field of primitive or String type
389 if (!descriptor.isVar()) {
390 Type type = typeMapper.mapType(descriptor);
391 return AsmUtil.isPrimitive(type) || "java.lang.String".equals(type.getClassName());
392 }
393 return false;
394 }
395
396 private void generateGetter(@Nullable KtNamedDeclaration p, @NotNull PropertyDescriptor descriptor, @Nullable KtPropertyAccessor getter) {
397 generateAccessor(p, getter, descriptor.getGetter() != null
398 ? descriptor.getGetter()
399 : DescriptorFactory.createDefaultGetter(descriptor, Annotations.Companion.getEMPTY()));
400 }
401
402 private void generateSetter(@Nullable KtNamedDeclaration p, @NotNull PropertyDescriptor descriptor, @Nullable KtPropertyAccessor setter) {
403 if (!descriptor.isVar()) return;
404
405 generateAccessor(p, setter, descriptor.getSetter() != null
406 ? descriptor.getSetter()
407 : DescriptorFactory.createDefaultSetter(descriptor, Annotations.Companion.getEMPTY()));
408 }
409
410 private void generateAccessor(
411 @Nullable KtNamedDeclaration p,
412 @Nullable KtPropertyAccessor accessor,
413 @NotNull PropertyAccessorDescriptor accessorDescriptor
414 ) {
415 if (context instanceof MultifileClassFacadeContext && Visibilities.isPrivate(accessorDescriptor.getVisibility())) {
416 return;
417 }
418
419 FunctionGenerationStrategy strategy;
420 if (accessor == null || !accessor.hasBody()) {
421 if (p instanceof KtProperty && ((KtProperty) p).hasDelegate()) {
422 strategy = new DelegatedPropertyAccessorStrategy(state, accessorDescriptor, indexOfDelegatedProperty((KtProperty) p));
423 }
424 else {
425 strategy = new DefaultPropertyAccessorStrategy(state, accessorDescriptor);
426 }
427 }
428 else {
429 strategy = new FunctionGenerationStrategy.FunctionDefault(state, accessorDescriptor, accessor);
430 }
431
432 functionCodegen.generateMethod(JvmDeclarationOriginKt.OtherOrigin(accessor != null ? accessor : p, accessorDescriptor), accessorDescriptor, strategy);
433 }
434
435 public static int indexOfDelegatedProperty(@NotNull KtProperty property) {
436 PsiElement parent = property.getParent();
437 KtDeclarationContainer container;
438 if (parent instanceof KtClassBody) {
439 container = ((KtClassOrObject) parent.getParent());
440 }
441 else if (parent instanceof KtFile) {
442 container = (KtFile) parent;
443 }
444 else {
445 throw new UnsupportedOperationException("Unknown delegated property container: " + parent);
446 }
447
448 int index = 0;
449 for (KtDeclaration declaration : container.getDeclarations()) {
450 if (declaration instanceof KtProperty && ((KtProperty) declaration).hasDelegate()) {
451 if (declaration == property) {
452 return index;
453 }
454 index++;
455 }
456 }
457
458 throw new IllegalStateException("Delegated property not found in its parent: " + PsiUtilsKt.getElementTextWithContext(property));
459 }
460
461
462 private static class DefaultPropertyAccessorStrategy extends FunctionGenerationStrategy.CodegenBased<PropertyAccessorDescriptor> {
463 public DefaultPropertyAccessorStrategy(@NotNull GenerationState state, @NotNull PropertyAccessorDescriptor descriptor) {
464 super(state, descriptor);
465 }
466
467 @Override
468 public void doGenerateBody(@NotNull ExpressionCodegen codegen, @NotNull JvmMethodSignature signature) {
469 InstructionAdapter v = codegen.v;
470 PropertyDescriptor propertyDescriptor = callableDescriptor.getCorrespondingProperty();
471 StackValue property = codegen.intermediateValueForProperty(propertyDescriptor, true, null, StackValue.LOCAL_0);
472
473 PsiElement jetProperty = DescriptorToSourceUtils.descriptorToDeclaration(propertyDescriptor);
474 if (jetProperty instanceof KtProperty || jetProperty instanceof KtParameter) {
475 codegen.markLineNumber((KtElement) jetProperty, false);
476 }
477
478 if (callableDescriptor instanceof PropertyGetterDescriptor) {
479 Type type = signature.getReturnType();
480 property.put(type, v);
481 v.areturn(type);
482 }
483 else if (callableDescriptor instanceof PropertySetterDescriptor) {
484 List<ValueParameterDescriptor> valueParameters = callableDescriptor.getValueParameters();
485 assert valueParameters.size() == 1 : "Property setter should have only one value parameter but has " + callableDescriptor;
486 int parameterIndex = codegen.lookupLocalIndex(valueParameters.get(0));
487 assert parameterIndex >= 0 : "Local index for setter parameter should be positive or zero: " + callableDescriptor;
488 Type type = codegen.typeMapper.mapType(propertyDescriptor);
489 property.store(StackValue.local(parameterIndex, type), codegen.v);
490 v.visitInsn(RETURN);
491 }
492 else {
493 throw new IllegalStateException("Unknown property accessor: " + callableDescriptor);
494 }
495 }
496 }
497
498 public static StackValue invokeDelegatedPropertyConventionMethod(
499 @NotNull PropertyDescriptor propertyDescriptor,
500 @NotNull ExpressionCodegen codegen,
501 @NotNull JetTypeMapper typeMapper,
502 @NotNull ResolvedCall<FunctionDescriptor> resolvedCall,
503 final int indexInPropertyMetadataArray,
504 int propertyMetadataArgumentIndex
505 ) {
506 CodegenContext<? extends ClassOrPackageFragmentDescriptor> ownerContext = codegen.getContext().getClassOrPackageParentContext();
507 final Type owner;
508 if (ownerContext instanceof ClassContext) {
509 owner = typeMapper.mapClass(((ClassContext) ownerContext).getContextDescriptor());
510 }
511 else if (ownerContext instanceof PackageContext) {
512 owner = ((PackageContext) ownerContext).getPackagePartType();
513 }
514 else if (ownerContext instanceof MultifileClassContextBase) {
515 owner = ((MultifileClassContextBase) ownerContext).getFilePartType();
516 }
517 else {
518 throw new UnsupportedOperationException("Unknown context: " + ownerContext);
519 }
520
521 codegen.tempVariables.put(
522 resolvedCall.getCall().getValueArguments().get(propertyMetadataArgumentIndex).asElement(),
523 new StackValue(PROPERTY_METADATA_TYPE) {
524 @Override
525 public void putSelector(@NotNull Type type, @NotNull InstructionAdapter v) {
526 Field array = StackValue
527 .field(Type.getType("[" + PROPERTY_METADATA_TYPE), owner, JvmAbi.DELEGATED_PROPERTIES_ARRAY_NAME, true,
528 StackValue.none());
529 StackValue.arrayElement(PROPERTY_METADATA_TYPE, array, StackValue.constant(indexInPropertyMetadataArray, Type.INT_TYPE)).put(type, v);
530 }
531 }
532 );
533
534 StackValue delegatedProperty = codegen.intermediateValueForProperty(propertyDescriptor, true, null, StackValue.LOCAL_0);
535 return codegen.invokeFunction(resolvedCall, delegatedProperty);
536 }
537
538 private static class DelegatedPropertyAccessorStrategy extends FunctionGenerationStrategy.CodegenBased<PropertyAccessorDescriptor> {
539 private final int index;
540
541 public DelegatedPropertyAccessorStrategy(@NotNull GenerationState state, @NotNull PropertyAccessorDescriptor descriptor, int index) {
542 super(state, descriptor);
543 this.index = index;
544 }
545
546 @Override
547 public void doGenerateBody(@NotNull ExpressionCodegen codegen, @NotNull JvmMethodSignature signature) {
548 InstructionAdapter v = codegen.v;
549
550 BindingContext bindingContext = state.getBindingContext();
551 ResolvedCall<FunctionDescriptor> resolvedCall =
552 bindingContext.get(BindingContext.DELEGATED_PROPERTY_RESOLVED_CALL, callableDescriptor);
553 assert resolvedCall != null : "Resolve call should be recorded for delegate call " + signature.toString();
554
555 StackValue lastValue = invokeDelegatedPropertyConventionMethod(callableDescriptor.getCorrespondingProperty(),
556 codegen, state.getTypeMapper(), resolvedCall, index, 1);
557 Type asmType = signature.getReturnType();
558 lastValue.put(asmType, v);
559 v.areturn(asmType);
560 }
561 }
562
563 public void genDelegate(@NotNull PropertyDescriptor delegate, @NotNull PropertyDescriptor delegateTo, @NotNull StackValue field) {
564 ClassDescriptor toClass = (ClassDescriptor) delegateTo.getContainingDeclaration();
565
566 PropertyGetterDescriptor getter = delegate.getGetter();
567 if (getter != null) {
568 //noinspection ConstantConditions
569 functionCodegen.genDelegate(getter, delegateTo.getGetter().getOriginal(), toClass, field);
570 }
571
572 PropertySetterDescriptor setter = delegate.getSetter();
573 if (setter != null) {
574 //noinspection ConstantConditions
575 functionCodegen.genDelegate(setter, delegateTo.getSetter().getOriginal(), toClass, field);
576 }
577 }
578 }