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