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.resolve;
018
019 import org.jetbrains.annotations.NotNull;
020 import org.jetbrains.annotations.Nullable;
021 import org.jetbrains.kotlin.builtins.KotlinBuiltIns;
022 import org.jetbrains.kotlin.descriptors.ClassDescriptor;
023 import org.jetbrains.kotlin.descriptors.VariableDescriptor;
024 import org.jetbrains.kotlin.descriptors.annotations.Annotated;
025 import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor;
026 import org.jetbrains.kotlin.name.FqName;
027 import org.jetbrains.kotlin.psi.JetExpression;
028 import org.jetbrains.kotlin.psi.JetParameter;
029 import org.jetbrains.kotlin.psi.JetTypeReference;
030 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
031 import org.jetbrains.kotlin.resolve.constants.BooleanValue;
032 import org.jetbrains.kotlin.resolve.constants.CompileTimeConstant;
033 import org.jetbrains.kotlin.resolve.constants.evaluate.ConstantExpressionEvaluator;
034 import org.jetbrains.kotlin.types.JetType;
035 import org.jetbrains.kotlin.types.TypeProjection;
036 import org.jetbrains.kotlin.types.TypeUtils;
037
038 import java.util.Collection;
039 import java.util.List;
040
041 import static org.jetbrains.kotlin.diagnostics.Errors.INVALID_TYPE_OF_ANNOTATION_MEMBER;
042 import static org.jetbrains.kotlin.diagnostics.Errors.NULLABLE_TYPE_OF_ANNOTATION_MEMBER;
043 import static org.jetbrains.kotlin.resolve.BindingContext.VALUE_PARAMETER;
044 import static org.jetbrains.kotlin.resolve.DescriptorUtils.isAnnotationClass;
045 import static org.jetbrains.kotlin.resolve.DescriptorUtils.isEnumClass;
046
047 public class CompileTimeConstantUtils {
048
049 public static void checkConstructorParametersType(@NotNull List<JetParameter> parameters, @NotNull BindingTrace trace) {
050 for (JetParameter parameter : parameters) {
051 VariableDescriptor parameterDescriptor = trace.getBindingContext().get(VALUE_PARAMETER, parameter);
052 if (parameterDescriptor == null) continue;
053 JetType parameterType = parameterDescriptor.getType();
054 JetTypeReference typeReference = parameter.getTypeReference();
055 if (typeReference != null) {
056 if (parameterType.isMarkedNullable()) {
057 trace.report(NULLABLE_TYPE_OF_ANNOTATION_MEMBER.on(typeReference));
058 }
059 else if (!isAcceptableTypeForAnnotationParameter(parameterType)) {
060 trace.report(INVALID_TYPE_OF_ANNOTATION_MEMBER.on(typeReference));
061 }
062 }
063 }
064 }
065
066 private static boolean isAcceptableTypeForAnnotationParameter(@NotNull JetType parameterType) {
067 ClassDescriptor typeDescriptor = TypeUtils.getClassDescriptor(parameterType);
068 if (typeDescriptor == null) {
069 return false;
070 }
071
072 KotlinBuiltIns builtIns = KotlinBuiltIns.getInstance();
073 if (isEnumClass(typeDescriptor) ||
074 isAnnotationClass(typeDescriptor) ||
075 isJavaLangClass(typeDescriptor) ||
076 KotlinBuiltIns.isPrimitiveArray(parameterType) ||
077 KotlinBuiltIns.isPrimitiveType(parameterType) ||
078 builtIns.getStringType().equals(parameterType)) {
079 return true;
080 }
081
082 if (KotlinBuiltIns.isArray(parameterType)) {
083 List<TypeProjection> arguments = parameterType.getArguments();
084 if (arguments.size() == 1) {
085 JetType arrayType = arguments.get(0).getType();
086 if (arrayType.isMarkedNullable()) {
087 return false;
088 }
089 ClassDescriptor arrayTypeDescriptor = TypeUtils.getClassDescriptor(arrayType);
090 if (arrayTypeDescriptor != null) {
091 return isEnumClass(arrayTypeDescriptor) ||
092 isAnnotationClass(arrayTypeDescriptor) ||
093 isJavaLangClass(arrayTypeDescriptor) ||
094 builtIns.getStringType().equals(arrayType);
095 }
096 }
097 }
098 return false;
099 }
100
101 @Nullable
102 public static String getIntrinsicAnnotationArgument(@NotNull Annotated annotatedDescriptor) {
103 AnnotationDescriptor intrinsicAnnotation =
104 annotatedDescriptor.getAnnotations().findAnnotation(new FqName("kotlin.jvm.internal.Intrinsic"));
105 if (intrinsicAnnotation == null) return null;
106
107 Collection<CompileTimeConstant<?>> values = intrinsicAnnotation.getAllValueArguments().values();
108 if (values.isEmpty()) return null;
109
110 Object value = values.iterator().next().getValue();
111 return value instanceof String ? (String) value : null;
112 }
113
114 public static boolean isArrayMethodCall(@NotNull ResolvedCall<?> resolvedCall) {
115 return "kotlin.arrays.array".equals(getIntrinsicAnnotationArgument(resolvedCall.getResultingDescriptor().getOriginal()));
116 }
117
118 public static boolean isJavaClassMethodCall(@NotNull ResolvedCall<?> resolvedCall) {
119 return "kotlin.javaClass.function".equals(getIntrinsicAnnotationArgument(resolvedCall.getResultingDescriptor().getOriginal()));
120 }
121
122 public static boolean isJavaLangClass(ClassDescriptor descriptor) {
123 return "java.lang.Class".equals(DescriptorUtils.getFqName(descriptor).asString());
124 }
125
126 public static boolean canBeReducedToBooleanConstant(
127 @Nullable JetExpression expression,
128 @NotNull BindingTrace trace,
129 @Nullable Boolean expectedValue
130 ) {
131 if (expression == null) return false;
132 CompileTimeConstant<?> compileTimeConstant =
133 ConstantExpressionEvaluator.OBJECT$.evaluate(expression, trace, KotlinBuiltIns.getInstance().getBooleanType());
134 if (!(compileTimeConstant instanceof BooleanValue) || compileTimeConstant.usesVariableAsConstant()) return false;
135
136 Boolean value = ((BooleanValue) compileTimeConstant).getValue();
137 return expectedValue == null || expectedValue.equals(value);
138 }
139
140 private CompileTimeConstantUtils() {
141 }
142 }