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org.jetbrains.kotlin.codegen.PropertyCodegen Maven / Gradle / Ivy
/*
* Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.codegen;
import com.intellij.psi.PsiElement;
import kotlin.Pair;
import kotlin.collections.CollectionsKt;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.codegen.context.CodegenContextUtil;
import org.jetbrains.kotlin.codegen.context.FieldOwnerContext;
import org.jetbrains.kotlin.codegen.context.MultifileClassFacadeContext;
import org.jetbrains.kotlin.codegen.context.MultifileClassPartContext;
import org.jetbrains.kotlin.codegen.state.GenerationState;
import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper;
import org.jetbrains.kotlin.config.LanguageFeature;
import org.jetbrains.kotlin.descriptors.*;
import org.jetbrains.kotlin.descriptors.annotations.Annotations;
import org.jetbrains.kotlin.load.java.DescriptorsJvmAbiUtil;
import org.jetbrains.kotlin.load.java.JvmAbi;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.resolve.BindingContext;
import org.jetbrains.kotlin.resolve.DescriptorFactory;
import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
import org.jetbrains.kotlin.resolve.InlineClassesUtilsKt;
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
import org.jetbrains.kotlin.resolve.calls.util.UnderscoreUtilKt;
import org.jetbrains.kotlin.resolve.constants.ConstantValue;
import org.jetbrains.kotlin.resolve.jvm.annotations.JvmAnnotationUtilKt;
import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOriginKt;
import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodGenericSignature;
import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature;
import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedPropertyDescriptor;
import org.jetbrains.kotlin.types.ErrorUtils;
import org.jetbrains.kotlin.types.KotlinType;
import org.jetbrains.org.objectweb.asm.FieldVisitor;
import org.jetbrains.org.objectweb.asm.MethodVisitor;
import org.jetbrains.org.objectweb.asm.Opcodes;
import org.jetbrains.org.objectweb.asm.Type;
import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
import org.jetbrains.org.objectweb.asm.commons.Method;
import java.util.Collections;
import java.util.List;
import static org.jetbrains.kotlin.codegen.DescriptorAsmUtil.getDeprecatedAccessFlag;
import static org.jetbrains.kotlin.codegen.DescriptorAsmUtil.getVisibilityForBackingField;
import static org.jetbrains.kotlin.codegen.FunctionCodegen.processInterfaceMethod;
import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isConstOrHasJvmFieldAnnotation;
import static org.jetbrains.kotlin.codegen.JvmCodegenUtil.isJvmInterface;
import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.*;
import static org.jetbrains.kotlin.codegen.serialization.JvmSerializationBindings.*;
import static org.jetbrains.kotlin.diagnostics.Errors.EXPECTED_FUNCTION_SOURCE_WITH_DEFAULT_ARGUMENTS_NOT_FOUND;
import static org.jetbrains.kotlin.fileClasses.JvmFileClassUtilKt.isTopLevelInJvmMultifileClass;
import static org.jetbrains.kotlin.resolve.DescriptorUtils.isCompanionObject;
import static org.jetbrains.kotlin.resolve.DescriptorUtils.isInterface;
import static org.jetbrains.kotlin.resolve.jvm.AsmTypes.K_PROPERTY_TYPE;
import static org.jetbrains.kotlin.resolve.jvm.annotations.JvmAnnotationUtilKt.hasJvmFieldAnnotation;
import static org.jetbrains.kotlin.resolve.jvm.annotations.JvmAnnotationUtilKt.hasJvmSyntheticAnnotation;
import static org.jetbrains.org.objectweb.asm.Opcodes.*;
public class PropertyCodegen {
private final GenerationState state;
private final ClassBuilder v;
private final FunctionCodegen functionCodegen;
private final KotlinTypeMapper typeMapper;
private final BindingContext bindingContext;
private final FieldOwnerContext context;
private final MemberCodegen memberCodegen;
private final OwnerKind kind;
public PropertyCodegen(
@NotNull FieldOwnerContext context,
@NotNull ClassBuilder v,
@NotNull FunctionCodegen functionCodegen,
@NotNull MemberCodegen memberCodegen
) {
this.state = functionCodegen.state;
this.v = v;
this.functionCodegen = functionCodegen;
this.typeMapper = state.getTypeMapper();
this.bindingContext = state.getBindingContext();
this.context = context;
this.memberCodegen = memberCodegen;
this.kind = context.getContextKind();
}
public void gen(@NotNull KtProperty property) {
VariableDescriptor variableDescriptor = bindingContext.get(BindingContext.VARIABLE, property);
if (!(variableDescriptor instanceof PropertyDescriptor)) {
throw ExceptionLogger.logDescriptorNotFound(
"Property " + property.getName() + " should have a property descriptor: " + variableDescriptor, property
);
}
PropertyDescriptor propertyDescriptor = (PropertyDescriptor) variableDescriptor;
gen(property, propertyDescriptor, property.getGetter(), property.getSetter());
}
public void genDestructuringDeclaration(@NotNull KtDestructuringDeclarationEntry entry) {
VariableDescriptor variableDescriptor = bindingContext.get(BindingContext.VARIABLE, entry);
if (!(variableDescriptor instanceof PropertyDescriptor)) {
throw ExceptionLogger.logDescriptorNotFound(
"Destructuring declaration entry" + entry.getName() + " should have a property descriptor: " + variableDescriptor, entry
);
}
if (!UnderscoreUtilKt.isSingleUnderscore(entry)) {
genDestructuringDeclaration((PropertyDescriptor) variableDescriptor);
}
}
public void generateInPackageFacade(@NotNull DeserializedPropertyDescriptor deserializedProperty) {
assert context instanceof MultifileClassFacadeContext : "should be called only for generating facade: " + context;
genBackingFieldAndAnnotations(deserializedProperty);
if (!isConstOrHasJvmFieldAnnotation(deserializedProperty)) {
generateGetter(deserializedProperty, null);
generateSetter(deserializedProperty, null);
}
}
private void gen(
@NotNull KtProperty declaration,
@NotNull PropertyDescriptor descriptor,
@Nullable KtPropertyAccessor getter,
@Nullable KtPropertyAccessor setter
) {
assert kind == OwnerKind.PACKAGE || kind == OwnerKind.IMPLEMENTATION ||
kind == OwnerKind.DEFAULT_IMPLS || kind == OwnerKind.ERASED_INLINE_CLASS
: "Generating property with a wrong kind (" + kind + "): " + descriptor;
genBackingFieldAndAnnotations(descriptor);
boolean isDefaultGetterAndSetter = isDefaultAccessor(getter) && isDefaultAccessor(setter);
if (isAccessorNeeded(descriptor, getter, isDefaultGetterAndSetter)) {
generateGetter(descriptor, getter);
}
if (isAccessorNeeded(descriptor, setter, isDefaultGetterAndSetter)) {
generateSetter(descriptor, setter);
}
}
private static boolean isDefaultAccessor(@Nullable KtPropertyAccessor accessor) {
return accessor == null || !accessor.hasBody();
}
private void genDestructuringDeclaration(@NotNull PropertyDescriptor descriptor) {
assert kind == OwnerKind.PACKAGE || kind == OwnerKind.IMPLEMENTATION || kind == OwnerKind.DEFAULT_IMPLS
: "Generating property with a wrong kind (" + kind + "): " + descriptor;
genBackingFieldAndAnnotations(descriptor);
generateGetter(descriptor, null);
generateSetter(descriptor, null);
}
private void genBackingFieldAndAnnotations(@NotNull PropertyDescriptor descriptor) {
// Fields and '$annotations' methods for non-private const properties are generated in the multi-file facade
boolean isBackingFieldOwner = descriptor.isConst() && !DescriptorVisibilities.isPrivate(descriptor.getVisibility())
? !(context instanceof MultifileClassPartContext)
: CodegenContextUtil.isImplementationOwner(context, descriptor);
generateBackingField(descriptor, isBackingFieldOwner);
generateSyntheticMethodIfNeeded(descriptor, isBackingFieldOwner);
}
private boolean isAccessorNeeded(
@NotNull PropertyDescriptor descriptor,
@Nullable KtPropertyAccessor accessor,
boolean isDefaultGetterAndSetter
) {
return isAccessorNeeded(descriptor, accessor, isDefaultGetterAndSetter, kind);
}
public static boolean isReferenceablePropertyWithGetter(@NotNull PropertyDescriptor descriptor) {
PsiElement psiElement = DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
KtDeclaration ktDeclaration = psiElement instanceof KtDeclaration ? (KtDeclaration) psiElement : null;
if (ktDeclaration instanceof KtProperty) {
KtProperty ktProperty = (KtProperty) ktDeclaration;
boolean isDefaultGetterAndSetter =
isDefaultAccessor(ktProperty.getGetter()) && isDefaultAccessor(ktProperty.getSetter());
return isAccessorNeeded(descriptor, ktProperty.getGetter(), isDefaultGetterAndSetter, OwnerKind.IMPLEMENTATION);
} else if (ktDeclaration instanceof KtParameter) {
return isAccessorNeeded(descriptor, null, true, OwnerKind.IMPLEMENTATION);
} else {
return isAccessorNeeded(descriptor, null, false, OwnerKind.IMPLEMENTATION);
}
}
/**
* Determines if it's necessary to generate an accessor to the property, i.e. if this property can be referenced via getter/setter
* for any reason
*
* @see JvmCodegenUtil#couldUseDirectAccessToProperty
*/
private static boolean isAccessorNeeded(
@NotNull PropertyDescriptor descriptor,
@Nullable KtPropertyAccessor accessor,
boolean isDefaultGetterAndSetter,
OwnerKind kind
) {
if (isConstOrHasJvmFieldAnnotation(descriptor)) return false;
boolean isDefaultAccessor = isDefaultAccessor(accessor);
// Don't generate accessors for interface properties with default accessors in DefaultImpls
if (kind == OwnerKind.DEFAULT_IMPLS && isDefaultAccessor) return false;
// Delegated or extension properties can only be referenced via accessors
if (descriptor.isDelegated() || descriptor.getExtensionReceiverParameter() != null) return true;
// Companion object properties should have accessors for non-private properties because these properties can be referenced
// via getter/setter. But these accessors getter/setter are not required for private properties that have a default getter
// and setter, in this case, the property can always be accessed through the accessor 'access$cp' and avoid some
// useless indirection by using others accessors.
if (isCompanionObject(descriptor.getContainingDeclaration())) {
if (DescriptorVisibilities.isPrivate(descriptor.getVisibility()) && isDefaultGetterAndSetter) {
return false;
}
return true;
}
// Non-const properties from multifile classes have accessors regardless of visibility
if (isTopLevelInJvmMultifileClass(descriptor)) return true;
// Private class properties have accessors only in cases when those accessors are non-trivial
if (DescriptorVisibilities.isPrivate(descriptor.getVisibility())) {
return !isDefaultAccessor;
}
// Non-private properties with private setter should not be generated for trivial properties
// as the class will use direct field access instead
//noinspection ConstantConditions
if (accessor != null && accessor.isSetter() && DescriptorVisibilities.isPrivate(descriptor.getSetter().getVisibility())) {
return !isDefaultAccessor;
}
// Non-public API (private and internal) primary vals of inline classes don't have getter
if (InlineClassesUtilsKt.isUnderlyingPropertyOfInlineClass(descriptor) && !descriptor.getVisibility().isPublicAPI()) {
return false;
}
return true;
}
private static boolean areAccessorsNeededForPrimaryConstructorProperty(
@NotNull PropertyDescriptor descriptor,
@NotNull OwnerKind kind
) {
if (hasJvmFieldAnnotation(descriptor)) return false;
if (kind == OwnerKind.ERASED_INLINE_CLASS) return false;
DescriptorVisibility visibility = descriptor.getVisibility();
if (InlineClassesUtilsKt.isInlineClass(descriptor.getContainingDeclaration())) {
return visibility.isPublicAPI();
}
else {
return !DescriptorVisibilities.isPrivate(visibility);
}
}
public void generatePrimaryConstructorProperty(@NotNull PropertyDescriptor descriptor) {
genBackingFieldAndAnnotations(descriptor);
if (areAccessorsNeededForPrimaryConstructorProperty(descriptor, context.getContextKind())) {
generateGetter(descriptor, null);
generateSetter(descriptor, null);
}
}
public void generateConstructorPropertyAsMethodForAnnotationClass(
@NotNull KtParameter parameter,
@NotNull PropertyDescriptor descriptor,
@Nullable FunctionDescriptor expectedAnnotationConstructor
) {
JvmMethodGenericSignature signature = typeMapper.mapAnnotationParameterSignature(descriptor);
Method asmMethod = signature.getAsmMethod();
MethodVisitor mv = v.newMethod(
JvmDeclarationOriginKt.OtherOrigin(parameter, descriptor),
ACC_PUBLIC | ACC_ABSTRACT,
asmMethod.getName(),
asmMethod.getDescriptor(),
signature.getGenericsSignature(),
null
);
PropertyGetterDescriptor getter = descriptor.getGetter();
assert getter != null : "Annotation property should have a getter: " + descriptor;
v.getSerializationBindings().put(METHOD_FOR_FUNCTION, getter, asmMethod);
AnnotationCodegen.forMethod(mv, memberCodegen, state).genAnnotations(getter, asmMethod.getReturnType(), null);
KtExpression defaultValue = loadAnnotationArgumentDefaultValue(parameter, descriptor, expectedAnnotationConstructor);
if (defaultValue != null) {
ConstantValue constant = ExpressionCodegen.getCompileTimeConstant(
defaultValue, bindingContext, true, state.getShouldInlineConstVals());
assert !state.getClassBuilderMode().generateBodies || constant != null
: "Default value for annotation parameter should be compile time value: " + defaultValue.getText();
if (constant != null) {
AnnotationCodegen annotationCodegen = AnnotationCodegen.forAnnotationDefaultValue(mv, memberCodegen, state);
annotationCodegen.generateAnnotationDefaultValue(constant, descriptor.getType());
}
}
mv.visitEnd();
}
private KtExpression loadAnnotationArgumentDefaultValue(
@NotNull KtParameter ktParameter,
@NotNull PropertyDescriptor descriptor,
@Nullable FunctionDescriptor expectedAnnotationConstructor
) {
KtExpression value = ktParameter.getDefaultValue();
if (value != null) return value;
if (expectedAnnotationConstructor != null) {
ValueParameterDescriptor expectedParameter = CollectionsKt.single(
expectedAnnotationConstructor.getValueParameters(), parameter -> parameter.getName().equals(descriptor.getName())
);
PsiElement element = DescriptorToSourceUtils.descriptorToDeclaration(expectedParameter);
if (!(element instanceof KtParameter)) {
state.getDiagnostics().report(EXPECTED_FUNCTION_SOURCE_WITH_DEFAULT_ARGUMENTS_NOT_FOUND.on(ktParameter));
return null;
}
return ((KtParameter) element).getDefaultValue();
}
return null;
}
private void generateBackingField(@NotNull PropertyDescriptor descriptor, boolean isBackingFieldOwner) {
if (isJvmInterface(descriptor.getContainingDeclaration()) || kind == OwnerKind.DEFAULT_IMPLS ||
kind == OwnerKind.ERASED_INLINE_CLASS) {
return;
}
Object defaultValue;
if (descriptor.isDelegated()) {
defaultValue = null;
}
else if (Boolean.TRUE.equals(bindingContext.get(BindingContext.BACKING_FIELD_REQUIRED, descriptor))) {
if (shouldWriteFieldInitializer(descriptor)) {
ConstantValue initializer = descriptor.getCompileTimeInitializer();
defaultValue = initializer == null ? null : initializer.getValue();
}
else {
defaultValue = null;
}
}
else {
return;
}
generateBackingField(descriptor, descriptor.isDelegated(), defaultValue, isBackingFieldOwner);
}
// Annotations on properties are stored in bytecode on an empty synthetic method. This way they're still
// accessible via reflection, and 'deprecated' and 'synthetic' flags prevent this method from being called accidentally
private void generateSyntheticMethodIfNeeded(@NotNull PropertyDescriptor descriptor, boolean isBackingFieldOwner) {
Annotations annotations = descriptor.getAnnotations();
if (annotations.isEmpty()) return;
Method signature = typeMapper.mapSyntheticMethodForPropertyAnnotations(descriptor);
if (kind != OwnerKind.DEFAULT_IMPLS && CodegenContextUtil.isImplementationOwner(context, descriptor)) {
v.getSerializationBindings().put(SYNTHETIC_METHOD_FOR_PROPERTY, descriptor, signature);
}
if (isBackingFieldOwner) {
if (!isInterface(context.getContextDescriptor()) ||
processInterfaceMethod(descriptor, kind, false, true, state.getJvmDefaultMode())) {
memberCodegen.generateSyntheticAnnotationsMethod(descriptor, signature, annotations);
}
}
}
private void generateBackingField(
@NotNull PropertyDescriptor propertyDescriptor,
boolean isDelegate,
@Nullable Object defaultValue,
boolean isBackingFieldOwner
) {
FieldDescriptor annotatedField = isDelegate ? propertyDescriptor.getDelegateField() : propertyDescriptor.getBackingField();
int modifiers = getDeprecatedAccessFlag(propertyDescriptor);
for (AnnotationCodegen.JvmFlagAnnotation flagAnnotation : AnnotationCodegen.FIELD_FLAGS) {
modifiers |= flagAnnotation.getJvmFlag(annotatedField);
}
if (kind == OwnerKind.PACKAGE) {
modifiers |= ACC_STATIC;
}
if (!propertyDescriptor.isLateInit() && (!propertyDescriptor.isVar() || isDelegate)) {
modifiers |= ACC_FINAL;
}
if (hasJvmSyntheticAnnotation(propertyDescriptor)) {
modifiers |= ACC_SYNTHETIC;
}
KotlinType kotlinType = isDelegate ? getDelegateTypeForProperty(propertyDescriptor, bindingContext) : propertyDescriptor.getType();
Type type = typeMapper.mapType(kotlinType);
ClassBuilder builder = v;
FieldOwnerContext backingFieldContext = context;
List additionalVisibleAnnotations = Collections.emptyList();
if (DescriptorAsmUtil.isInstancePropertyWithStaticBackingField(propertyDescriptor) ) {
modifiers |= ACC_STATIC;
if (DescriptorsJvmAbiUtil.isPropertyWithBackingFieldInOuterClass(propertyDescriptor)) {
ImplementationBodyCodegen codegen = (ImplementationBodyCodegen) memberCodegen.getParentCodegen();
builder = codegen.v;
backingFieldContext = codegen.context;
if (DescriptorVisibilities.isPrivate(((ClassDescriptor) propertyDescriptor.getContainingDeclaration()).getVisibility())) {
modifiers |= ACC_DEPRECATED;
additionalVisibleAnnotations = Collections.singletonList(CodegenUtilKt.JAVA_LANG_DEPRECATED);
}
}
}
modifiers |= getVisibilityForBackingField(propertyDescriptor, isDelegate);
if (DescriptorAsmUtil.isPropertyWithBackingFieldCopyInOuterClass(propertyDescriptor)) {
ImplementationBodyCodegen parentBodyCodegen = (ImplementationBodyCodegen) memberCodegen.getParentCodegen();
parentBodyCodegen.addCompanionObjectPropertyToCopy(propertyDescriptor, defaultValue);
}
String name = backingFieldContext.getFieldName(propertyDescriptor, isDelegate);
v.getSerializationBindings().put(FIELD_FOR_PROPERTY, propertyDescriptor, new Pair<>(type, name));
if (isBackingFieldOwner) {
String signature = isDelegate ? null : typeMapper.mapFieldSignature(kotlinType, propertyDescriptor);
FieldVisitor fv = builder.newField(
JvmDeclarationOriginKt.OtherOrigin(propertyDescriptor), modifiers, name, type.getDescriptor(),
signature, defaultValue
);
if (annotatedField != null) {
// Don't emit nullability annotations for backing field if:
// - backing field is synthetic;
// - property is lateinit (since corresponding field is actually nullable).
boolean skipNullabilityAnnotations =
(modifiers & ACC_SYNTHETIC) != 0 ||
propertyDescriptor.isLateInit();
AnnotationCodegen.forField(fv, memberCodegen, state, skipNullabilityAnnotations)
.genAnnotations(annotatedField, type, propertyDescriptor.getType(), null, additionalVisibleAnnotations);
}
if (propertyDescriptor.getContainingDeclaration() instanceof ClassDescriptor && JvmAnnotationUtilKt.isJvmRecord((ClassDescriptor) propertyDescriptor.getContainingDeclaration())) {
ClassBuilderRecordKt.addRecordComponent(builder, name, type.getDescriptor(), signature);
}
}
}
@NotNull
public static KotlinType getDelegateTypeForProperty(
@NotNull PropertyDescriptor propertyDescriptor,
@NotNull BindingContext bindingContext
) {
ResolvedCall provideDelegateResolvedCall =
bindingContext.get(BindingContext.PROVIDE_DELEGATE_RESOLVED_CALL, propertyDescriptor);
KtProperty property = (KtProperty) DescriptorToSourceUtils.descriptorToDeclaration(propertyDescriptor);
KtExpression delegateExpression = property != null ? property.getDelegateExpression() : null;
KotlinType delegateType;
if (provideDelegateResolvedCall != null) {
delegateType = provideDelegateResolvedCall.getResultingDescriptor().getReturnType();
}
else if (delegateExpression != null) {
delegateType = bindingContext.getType(delegateExpression);
}
else {
delegateType = null;
}
if (delegateType == null) {
// Delegation convention is unresolved
delegateType = ErrorUtils.createErrorType("Delegate type");
}
return delegateType;
}
private boolean shouldWriteFieldInitializer(@NotNull PropertyDescriptor descriptor) {
if (!descriptor.isConst() &&
state.getLanguageVersionSettings().supportsFeature(LanguageFeature.NoConstantValueAttributeForNonConstVals)) {
return false;
}
//final field of primitive or String type
if (!descriptor.isVar()) {
Type type = typeMapper.mapType(descriptor);
return AsmUtil.isPrimitive(type) || "java.lang.String".equals(type.getClassName());
}
return false;
}
private void generateGetter(@NotNull PropertyDescriptor descriptor, @Nullable KtPropertyAccessor getter) {
generateAccessor(
getter,
descriptor.getGetter() != null ? descriptor.getGetter() : DescriptorFactory.createDefaultGetter(
descriptor, Annotations.Companion.getEMPTY()
)
);
}
private void generateSetter(@NotNull PropertyDescriptor descriptor, @Nullable KtPropertyAccessor setter) {
if (!descriptor.isVar()) return;
generateAccessor(
setter,
descriptor.getSetter() != null ? descriptor.getSetter() : DescriptorFactory.createDefaultSetter(
descriptor, Annotations.Companion.getEMPTY(), Annotations.Companion.getEMPTY()
)
);
}
private void generateAccessor(@Nullable KtPropertyAccessor accessor, @NotNull PropertyAccessorDescriptor descriptor) {
if (context instanceof MultifileClassFacadeContext &&
(DescriptorVisibilities.isPrivate(descriptor.getVisibility()) ||
DescriptorAsmUtil.getVisibilityAccessFlag(descriptor) == Opcodes.ACC_PRIVATE)) {
return;
}
FunctionGenerationStrategy strategy;
if (accessor == null || !accessor.hasBody()) {
if (descriptor.getCorrespondingProperty().isDelegated()) {
strategy = new DelegatedPropertyAccessorStrategy(state, descriptor);
}
else {
strategy = new DefaultPropertyAccessorStrategy(state, descriptor);
}
}
else {
strategy = new FunctionGenerationStrategy.FunctionDefault(state, accessor);
}
functionCodegen.generateMethod(JvmDeclarationOriginKt.OtherOrigin(descriptor), descriptor, strategy);
}
private static class DefaultPropertyAccessorStrategy extends FunctionGenerationStrategy.CodegenBased {
private final PropertyAccessorDescriptor propertyAccessorDescriptor;
public DefaultPropertyAccessorStrategy(@NotNull GenerationState state, @NotNull PropertyAccessorDescriptor descriptor) {
super(state);
propertyAccessorDescriptor = descriptor;
}
@Override
public void doGenerateBody(@NotNull ExpressionCodegen codegen, @NotNull JvmMethodSignature signature) {
InstructionAdapter v = codegen.v;
PropertyDescriptor propertyDescriptor = propertyAccessorDescriptor.getCorrespondingProperty();
StackValue property = codegen.intermediateValueForProperty(propertyDescriptor, true, null, StackValue.LOCAL_0);
PsiElement jetProperty = DescriptorToSourceUtils.descriptorToDeclaration(propertyDescriptor);
if (jetProperty instanceof KtProperty || jetProperty instanceof KtParameter) {
codegen.markLineNumber((KtElement) jetProperty, false);
}
if (propertyAccessorDescriptor instanceof PropertyGetterDescriptor) {
Type type = signature.getReturnType();
property.put(type, v);
v.areturn(type);
}
else if (propertyAccessorDescriptor instanceof PropertySetterDescriptor) {
List valueParameters = propertyAccessorDescriptor.getValueParameters();
assert valueParameters.size() == 1 : "Property setter should have only one value parameter but has " + propertyAccessorDescriptor;
int parameterIndex = codegen.lookupLocalIndex(valueParameters.get(0));
assert parameterIndex >= 0 : "Local index for setter parameter should be positive or zero: " + propertyAccessorDescriptor;
Type type = codegen.typeMapper.mapType(propertyDescriptor);
property.store(StackValue.local(parameterIndex, type), codegen.v);
v.visitInsn(RETURN);
}
else {
throw new IllegalStateException("Unknown property accessor: " + propertyAccessorDescriptor);
}
}
}
public static StackValue invokeDelegatedPropertyConventionMethod(
@NotNull ExpressionCodegen codegen,
@NotNull ResolvedCall resolvedCall,
@NotNull StackValue receiver,
@NotNull PropertyDescriptor propertyDescriptor
) {
codegen.tempVariables.put(
resolvedCall.getCall().getValueArguments().get(1).asElement(),
getDelegatedPropertyMetadata(propertyDescriptor, codegen.getBindingContext())
);
return codegen.invokeFunction(resolvedCall, receiver);
}
public static boolean isDelegatedPropertyWithOptimizedMetadata(
@NotNull VariableDescriptorWithAccessors descriptor,
@NotNull BindingContext bindingContext
) {
return Boolean.TRUE == bindingContext.get(DELEGATED_PROPERTY_WITH_OPTIMIZED_METADATA, descriptor);
}
public static @NotNull StackValue getOptimizedDelegatedPropertyMetadataValue() {
return StackValue.constant(null, K_PROPERTY_TYPE);
}
@NotNull
public static StackValue getDelegatedPropertyMetadata(
@NotNull VariableDescriptorWithAccessors descriptor,
@NotNull BindingContext bindingContext
) {
if (isDelegatedPropertyWithOptimizedMetadata(descriptor, bindingContext)) {
return getOptimizedDelegatedPropertyMetadataValue();
}
Type owner = bindingContext.get(DELEGATED_PROPERTY_METADATA_OWNER, descriptor);
assert owner != null : "Delegated property owner not found: " + descriptor;
List allDelegatedProperties = bindingContext.get(DELEGATED_PROPERTIES_WITH_METADATA, owner);
int index = allDelegatedProperties == null ? -1 : allDelegatedProperties.indexOf(descriptor);
if (index < 0) {
throw new AssertionError("Delegated property not found in " + owner + ": " + descriptor);
}
StackValue.Field array = StackValue.field(
Type.getType("[" + K_PROPERTY_TYPE), owner, JvmAbi.DELEGATED_PROPERTIES_ARRAY_NAME, true, StackValue.none()
);
return StackValue.arrayElement(K_PROPERTY_TYPE, null, array, StackValue.constant(index));
}
private static class DelegatedPropertyAccessorStrategy extends FunctionGenerationStrategy.CodegenBased {
private final PropertyAccessorDescriptor propertyAccessorDescriptor;
public DelegatedPropertyAccessorStrategy(@NotNull GenerationState state, @NotNull PropertyAccessorDescriptor descriptor) {
super(state);
this.propertyAccessorDescriptor = descriptor;
}
@Override
public void doGenerateBody(@NotNull ExpressionCodegen codegen, @NotNull JvmMethodSignature signature) {
InstructionAdapter v = codegen.v;
BindingContext bindingContext = state.getBindingContext();
ResolvedCall resolvedCall =
bindingContext.get(BindingContext.DELEGATED_PROPERTY_RESOLVED_CALL, propertyAccessorDescriptor);
assert resolvedCall != null : "Resolve call should be recorded for delegate call " + signature.toString();
PropertyDescriptor propertyDescriptor = propertyAccessorDescriptor.getCorrespondingProperty();
StackValue.Property property = codegen.intermediateValueForProperty(propertyDescriptor, true, null, StackValue.LOCAL_0);
StackValue.Property delegate = property.getDelegateOrNull();
assert delegate != null : "No delegate for delegated property: " + propertyDescriptor;
StackValue lastValue = invokeDelegatedPropertyConventionMethod(codegen, resolvedCall, delegate, propertyDescriptor);
Type asmType = signature.getReturnType();
KotlinType kotlinReturnType = propertyAccessorDescriptor.getOriginal().getReturnType();
lastValue.put(asmType, kotlinReturnType, v);
v.areturn(asmType);
}
}
public void genDelegate(@NotNull PropertyDescriptor delegate, @NotNull PropertyDescriptor delegateTo, @NotNull StackValue field) {
ClassDescriptor toClass = (ClassDescriptor) delegateTo.getContainingDeclaration();
PropertyGetterDescriptor getter = delegate.getGetter();
if (getter != null) {
//noinspection ConstantConditions
functionCodegen.genDelegate(getter, delegateTo.getGetter().getOriginal(), toClass, field);
}
PropertySetterDescriptor setter = delegate.getSetter();
if (setter != null) {
//noinspection ConstantConditions
functionCodegen.genDelegate(setter, delegateTo.getSetter().getOriginal(), toClass, field);
}
}
}
