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