001 /*
002 * Copyright 2010-2013 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.jet.lang.resolve.java.kotlinSignature;
018
019 import org.jetbrains.annotations.NotNull;
020 import org.jetbrains.annotations.Nullable;
021 import org.jetbrains.annotations.TestOnly;
022 import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
023 import org.jetbrains.jet.lang.descriptors.ClassifierDescriptor;
024 import org.jetbrains.jet.lang.descriptors.TypeParameterDescriptor;
025 import org.jetbrains.jet.lang.descriptors.impl.TypeParameterDescriptorImpl;
026 import org.jetbrains.jet.lang.psi.*;
027 import org.jetbrains.jet.lang.resolve.DescriptorUtils;
028 import org.jetbrains.jet.lang.resolve.TypeResolver;
029 import org.jetbrains.jet.lang.resolve.java.JavaPackage;
030 import org.jetbrains.jet.lang.resolve.java.mapping.JavaToKotlinClassMap;
031 import org.jetbrains.jet.lang.resolve.java.mapping.KotlinToJavaTypesMap;
032 import org.jetbrains.jet.lang.resolve.java.resolver.TypeUsage;
033 import org.jetbrains.jet.lang.resolve.name.FqName;
034 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
035 import org.jetbrains.jet.lang.types.*;
036 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
037 import org.jetbrains.jet.renderer.DescriptorRenderer;
038
039 import java.util.*;
040
041 import static org.jetbrains.jet.lang.resolve.java.resolver.TypeUsage.TYPE_ARGUMENT;
042 import static org.jetbrains.jet.lang.types.Variance.INVARIANT;
043
044 public class TypeTransformingVisitor extends JetVisitor<JetType, Void> {
045 private static boolean strictMode = false;
046
047 private final JetType originalType;
048 private final Map<TypeParameterDescriptor, TypeParameterDescriptorImpl> originalToAltTypeParameters;
049
050 private final TypeUsage typeUsage;
051
052 private TypeTransformingVisitor(
053 JetType originalType,
054 Map<TypeParameterDescriptor, TypeParameterDescriptorImpl> originalToAltTypeParameters,
055 TypeUsage typeUsage
056 ) {
057 this.originalType = originalType;
058 this.typeUsage = typeUsage;
059 this.originalToAltTypeParameters = Collections.unmodifiableMap(originalToAltTypeParameters);
060 }
061
062 @NotNull
063 public static JetType computeType(
064 @NotNull JetTypeElement alternativeTypeElement,
065 @NotNull JetType originalType,
066 @NotNull Map<TypeParameterDescriptor, TypeParameterDescriptorImpl> originalToAltTypeParameters,
067 @NotNull TypeUsage typeUsage
068 ) {
069 JetType computedType = alternativeTypeElement.accept(new TypeTransformingVisitor(originalType, originalToAltTypeParameters, typeUsage), null);
070 assert (computedType != null);
071 return computedType;
072 }
073
074 @Override
075 public JetType visitNullableType(@NotNull JetNullableType nullableType, Void aVoid) {
076 if (!TypeUtils.isNullableType(originalType) && typeUsage != TYPE_ARGUMENT) {
077 throw new AlternativeSignatureMismatchException("Auto type '%s' is not-null, while type in alternative signature is nullable: '%s'",
078 DescriptorRenderer.FQ_NAMES_IN_TYPES.renderType(originalType), nullableType.getText());
079 }
080 JetTypeElement innerType = nullableType.getInnerType();
081 assert innerType != null : "Syntax error: " + nullableType.getText();
082 return TypeUtils.makeNullable(computeType(innerType, originalType, originalToAltTypeParameters, typeUsage));
083 }
084
085 @Override
086 public JetType visitFunctionType(@NotNull JetFunctionType type, Void data) {
087 return visitCommonType(type.getReceiverTypeRef() == null
088 ? KotlinBuiltIns.getInstance().getFunction(type.getParameters().size())
089 : KotlinBuiltIns.getInstance().getExtensionFunction(type.getParameters().size()), type);
090 }
091
092 @Override
093 public JetType visitUserType(@NotNull JetUserType type, Void data) {
094 JetUserType qualifier = type.getQualifier();
095
096 //noinspection ConstantConditions
097 String shortName = type.getReferenceExpression().getReferencedName();
098 String longName = (qualifier == null ? "" : qualifier.getText() + ".") + shortName;
099
100 return visitCommonType(longName, type);
101 }
102
103 private JetType visitCommonType(@NotNull ClassDescriptor classDescriptor, @NotNull JetTypeElement type) {
104 return visitCommonType(DescriptorUtils.getFqNameSafe(classDescriptor).asString(), type);
105 }
106
107 @NotNull
108 private JetType visitCommonType(@NotNull String qualifiedName, @NotNull JetTypeElement type) {
109 if (originalType.isError()) {
110 return originalType;
111 }
112 TypeConstructor originalTypeConstructor = originalType.getConstructor();
113 ClassifierDescriptor declarationDescriptor = originalTypeConstructor.getDeclarationDescriptor();
114 assert declarationDescriptor != null;
115 FqName originalClassFqName = DescriptorUtils.getFqNameSafe(declarationDescriptor);
116 ClassDescriptor classFromLibrary = getAutoTypeAnalogWithinBuiltins(originalClassFqName, qualifiedName);
117 if (!isSameName(qualifiedName, originalClassFqName.asString()) && classFromLibrary == null) {
118 throw new AlternativeSignatureMismatchException("Alternative signature type mismatch, expected: %s, actual: %s",
119 qualifiedName, originalClassFqName);
120 }
121
122 TypeConstructor typeConstructor;
123 if (classFromLibrary != null) {
124 typeConstructor = classFromLibrary.getTypeConstructor();
125 }
126 else {
127 typeConstructor = originalTypeConstructor;
128 }
129 ClassifierDescriptor typeConstructorClassifier = typeConstructor.getDeclarationDescriptor();
130 if (typeConstructorClassifier instanceof TypeParameterDescriptor && originalToAltTypeParameters.containsKey(typeConstructorClassifier)) {
131 typeConstructor = originalToAltTypeParameters.get(typeConstructorClassifier).getTypeConstructor();
132 }
133
134 List<TypeProjection> arguments = originalType.getArguments();
135
136 if (arguments.size() != type.getTypeArgumentsAsTypes().size()) {
137 if (JavaPackage.getPLATFORM_TYPES()) return originalType;
138
139 throw new AlternativeSignatureMismatchException("'%s' type in method signature has %d type arguments, while '%s' in alternative signature has %d of them",
140 DescriptorRenderer.FQ_NAMES_IN_TYPES.renderType(originalType), arguments.size(), type.getText(),
141 type.getTypeArgumentsAsTypes().size());
142 }
143
144 List<TypeProjection> altArguments = new ArrayList<TypeProjection>();
145 for (int i = 0, size = arguments.size(); i < size; i++) {
146 altArguments.add(getAltArgument(type, typeConstructor, i, arguments.get(i)));
147 }
148
149 JetScope memberScope;
150 if (typeConstructorClassifier instanceof TypeParameterDescriptor) {
151 memberScope = ((TypeParameterDescriptor) typeConstructorClassifier).getUpperBoundsAsType().getMemberScope();
152 }
153 else if (typeConstructorClassifier instanceof ClassDescriptor) {
154 memberScope = ((ClassDescriptor) typeConstructorClassifier).getMemberScope(altArguments);
155 }
156 else {
157 throw new AssertionError("Unexpected class of type constructor classifier "
158 + (typeConstructorClassifier == null ? "null" : typeConstructorClassifier.getClass().getName()));
159 }
160 return new JetTypeImpl(originalType.getAnnotations(), typeConstructor, false,
161 altArguments, memberScope);
162 }
163
164 @NotNull
165 private TypeProjection getAltArgument(
166 @NotNull JetTypeElement type,
167 @NotNull TypeConstructor typeConstructor,
168 int i,
169 @NotNull TypeProjection originalArgument
170 ) {
171 JetTypeReference typeReference = type.getTypeArgumentsAsTypes().get(i); // process both function type and user type
172
173 if (typeReference == null) {
174 // star projection
175 assert type instanceof JetUserType
176 && ((JetUserType) type).getTypeArguments().get(i).getProjectionKind() == JetProjectionKind.STAR;
177
178 return originalArgument;
179 }
180
181 JetTypeElement argumentAlternativeTypeElement = typeReference.getTypeElement();
182 assert argumentAlternativeTypeElement != null;
183
184 TypeParameterDescriptor parameter = typeConstructor.getParameters().get(i);
185 JetType alternativeArgumentType = computeType(argumentAlternativeTypeElement, originalArgument.getType(), originalToAltTypeParameters, TYPE_ARGUMENT);
186 Variance projectionKind = originalArgument.getProjectionKind();
187 Variance altProjectionKind;
188 if (type instanceof JetUserType) {
189 JetTypeProjection typeProjection = ((JetUserType) type).getTypeArguments().get(i);
190 altProjectionKind = TypeResolver.resolveProjectionKind(typeProjection.getProjectionKind());
191 if (altProjectionKind != projectionKind && projectionKind != Variance.INVARIANT && !JavaPackage.getPLATFORM_TYPES()) {
192 throw new AlternativeSignatureMismatchException("Projection kind mismatch, actual: %s, in alternative signature: %s",
193 projectionKind, altProjectionKind);
194 }
195 if (altProjectionKind != INVARIANT && parameter.getVariance() != INVARIANT) {
196 if (altProjectionKind == parameter.getVariance()) {
197 if (strictMode) {
198 throw new AlternativeSignatureMismatchException("Projection kind '%s' is redundant",
199 altProjectionKind, DescriptorUtils.getFqName(typeConstructor.getDeclarationDescriptor()));
200 }
201 else {
202 altProjectionKind = projectionKind;
203 }
204 }
205 else {
206 throw new AlternativeSignatureMismatchException("Projection kind '%s' is conflicting with variance of %s",
207 altProjectionKind, DescriptorUtils.getFqName(typeConstructor.getDeclarationDescriptor()));
208 }
209 }
210 }
211 else {
212 altProjectionKind = projectionKind;
213 }
214 return new TypeProjectionImpl(altProjectionKind, alternativeArgumentType);
215 }
216
217 @Nullable
218 private static ClassDescriptor getAutoTypeAnalogWithinBuiltins(@NotNull FqName originalClassFqName, @NotNull String qualifiedName) {
219 FqName javaFqName = KotlinToJavaTypesMap.getInstance().getKotlinToJavaFqName(originalClassFqName);
220 if (javaFqName == null) return null;
221
222 Collection<ClassDescriptor> descriptors = JavaToKotlinClassMap.getInstance().mapPlatformClass(javaFqName);
223 for (ClassDescriptor descriptor : descriptors) {
224 String fqName = DescriptorUtils.getFqName(descriptor).asString();
225 if (isSameName(qualifiedName, fqName)) {
226 return descriptor;
227 }
228 }
229 return null;
230 }
231
232 @Override
233 public JetType visitSelfType(@NotNull JetSelfType type, Void data) {
234 throw new UnsupportedOperationException("Self-types are not supported yet");
235 }
236
237 private static boolean isSameName(String qualifiedName, String fullyQualifiedName) {
238 return fullyQualifiedName.equals(qualifiedName) || fullyQualifiedName.endsWith("." + qualifiedName);
239 }
240
241 @TestOnly
242 public static void setStrictMode(boolean strictMode) {
243 TypeTransformingVisitor.strictMode = strictMode;
244 }
245 }