kotlin-fork/compiler/tests/org/jetbrains/jet/resolve/JetExpectedResolveDataUtil.java

/*
 * Copyright 2010-2013 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.jet.resolve;

import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import junit.framework.Assert;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.jet.JetTestUtils;
import org.jetbrains.jet.di.InjectorForJavaDescriptorResolver;
import org.jetbrains.jet.di.InjectorForJavaDescriptorResolverUtil;
import org.jetbrains.jet.di.InjectorForTests;
import org.jetbrains.jet.lang.descriptors.*;
import org.jetbrains.jet.lang.resolve.BindingTraceContext;
import org.jetbrains.jet.lang.resolve.calls.autocasts.DataFlowInfo;
import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
import org.jetbrains.jet.lang.resolve.calls.results.OverloadResolutionResults;
import org.jetbrains.jet.lang.resolve.java.structure.JavaClass;
import org.jetbrains.jet.lang.resolve.java.structure.impl.JavaClassImpl;
import org.jetbrains.jet.lang.resolve.name.FqName;
import org.jetbrains.jet.lang.resolve.name.Name;
import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverValue;
import org.jetbrains.jet.lang.types.JetType;
import org.jetbrains.jet.lang.types.TypeUtils;
import org.jetbrains.jet.lang.types.expressions.ExpressionTypingContext;
import org.jetbrains.jet.lang.types.expressions.ExpressionTypingServices;
import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static com.intellij.testFramework.UsefulTestCase.assertInstanceOf;

public class JetExpectedResolveDataUtil {
    private JetExpectedResolveDataUtil() {
    }

    public static Map<String, DeclarationDescriptor> prepareDefaultNameToDescriptors(Project project) {
        KotlinBuiltIns builtIns = KotlinBuiltIns.getInstance();

        Map<String, DeclarationDescriptor> nameToDescriptor = new HashMap<String, DeclarationDescriptor>();
        nameToDescriptor.put("kotlin::Int.plus(Int)", standardFunction(builtIns.getInt(), "plus", project, builtIns.getIntType()));
        FunctionDescriptor descriptorForGet = standardFunction(builtIns.getArray(), "get", project, builtIns.getIntType());
        nameToDescriptor.put("kotlin::Array.get(Int)", descriptorForGet.getOriginal());
        nameToDescriptor.put("kotlin::Int.compareTo(Double)", standardFunction(builtIns.getInt(), "compareTo", project, builtIns.getDoubleType()));
        @NotNull
        FunctionDescriptor descriptorForSet = standardFunction(builtIns.getArray(), "set", project, builtIns.getIntType(), builtIns.getIntType());
        nameToDescriptor.put("kotlin::Array.set(Int, Int)", descriptorForSet.getOriginal());

        return nameToDescriptor;
    }

    public static Map<String, PsiElement> prepareDefaultNameToDeclaration(Project project) {
        Map<String, PsiElement> nameToDeclaration = new HashMap<String, PsiElement>();

        PsiClass java_util_Collections = findClass("java.util.Collections", project);
        nameToDeclaration.put("java::java.util.Collections.emptyList()", findMethod(java_util_Collections, "emptyList"));
        nameToDeclaration.put("java::java.util.Collections", java_util_Collections);
        PsiClass java_util_List = findClass("java.util.ArrayList", project);
        nameToDeclaration.put("java::java.util.List", findClass("java.util.List", project));
        nameToDeclaration.put("java::java.util.ArrayList", java_util_List);
        nameToDeclaration.put("java::java.util.ArrayList.set()", java_util_List.findMethodsByName("set", true)[0]);
        nameToDeclaration.put("java::java.util.ArrayList.get()", java_util_List.findMethodsByName("get", true)[0]);
        nameToDeclaration.put("java::java", findPackage("java", project));
        nameToDeclaration.put("java::java.util", findPackage("java.util", project));
        nameToDeclaration.put("java::java.lang", findPackage("java.lang", project));
        nameToDeclaration.put("java::java.lang.Object", findClass("java.lang.Object", project));
        nameToDeclaration.put("java::java.lang.Comparable", findClass("java.lang.Comparable", project));
        PsiClass java_lang_System = findClass("java.lang.System", project);
        nameToDeclaration.put("java::java.lang.System", java_lang_System);
        PsiMethod[] methods = findClass("java.io.PrintStream", project).findMethodsByName("print", true);
        nameToDeclaration.put("java::java.io.PrintStream.print(Object)", methods[8]);
        nameToDeclaration.put("java::java.io.PrintStream.print(Int)", methods[2]);
        nameToDeclaration.put("java::java.io.PrintStream.print(char[])", methods[6]);
        nameToDeclaration.put("java::java.io.PrintStream.print(Double)", methods[5]);
        PsiField outField = java_lang_System.findFieldByName("out", true);
        Assert.assertNotNull("'out' property wasn't found", outField);
        nameToDeclaration.put("java::java.lang.System.out", outField);
        PsiClass java_lang_Number = findClass("java.lang.Number", project);
        nameToDeclaration.put("java::java.lang.Number", java_lang_Number);
        nameToDeclaration.put("java::java.lang.Number.intValue()", java_lang_Number.findMethodsByName("intValue", true)[0]);

        return nameToDeclaration;
    }

    @NotNull
    private static PsiElement findPackage(String qualifiedName, Project project) {
        JavaPsiFacade javaFacade = JavaPsiFacade.getInstance(project);
        PsiPackage javaFacadePackage = javaFacade.findPackage(qualifiedName);
        Assert.assertNotNull("Package wasn't found: " + qualifiedName, javaFacadePackage);
        return javaFacadePackage;
    }

    @NotNull
    private static PsiMethod findMethod(PsiClass psiClass, String name) {
        PsiMethod[] emptyLists = psiClass.findMethodsByName(name, true);
        return emptyLists[0];
    }

    @NotNull
    private static PsiClass findClass(String qualifiedName, Project project) {
        InjectorForJavaDescriptorResolver injector = InjectorForJavaDescriptorResolverUtil.create(project, new BindingTraceContext(), false);
        JavaClass javaClass = injector.getJavaClassFinder().findClass(new FqName(qualifiedName));
        Assert.assertNotNull("Class wasn't found: " + qualifiedName, javaClass);
        assertInstanceOf(javaClass, JavaClassImpl.class);
        return ((JavaClassImpl) javaClass).getPsi();
    }

    @NotNull
    private static FunctionDescriptor standardFunction(
            ClassDescriptor classDescriptor,
            String name,
            Project project,
            JetType... parameterTypes
    ) {
        ModuleDescriptor emptyModule = JetTestUtils.createEmptyModule();
        InjectorForTests injector = new InjectorForTests(project, emptyModule);
        ExpressionTypingServices expressionTypingServices = injector.getExpressionTypingServices();

        ExpressionTypingContext context = ExpressionTypingContext.newContext(
                expressionTypingServices, new BindingTraceContext(), classDescriptor.getDefaultType().getMemberScope(),
                DataFlowInfo.EMPTY, TypeUtils.NO_EXPECTED_TYPE);

        OverloadResolutionResults<FunctionDescriptor> functions = injector.getExpressionTypingUtils().resolveFakeCall(
                context, ReceiverValue.NO_RECEIVER, Name.identifier(name), parameterTypes);

        for (ResolvedCall<? extends FunctionDescriptor> resolvedCall : functions.getResultingCalls()) {
            List<ValueParameterDescriptor> unsubstitutedValueParameters = resolvedCall.getResultingDescriptor().getValueParameters();
            for (int i = 0, unsubstitutedValueParametersSize = unsubstitutedValueParameters.size(); i < unsubstitutedValueParametersSize; i++) {
                ValueParameterDescriptor unsubstitutedValueParameter = unsubstitutedValueParameters.get(i);
                if (unsubstitutedValueParameter.getType().equals(parameterTypes[i])) {
                    return resolvedCall.getResultingDescriptor();
                }
            }
        }
        throw new IllegalArgumentException("Not found: kotlin::" + classDescriptor.getName() + "." + name + "(" +
                                           Arrays.toString(parameterTypes) + ")");
    }
}