org.jetbrains.kotlin.resolve.AllUnderImportScope.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2015 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.kotlin.resolve

import org.jetbrains.kotlin.descriptors.*
import org.jetbrains.kotlin.incremental.components.LookupLocation
import org.jetbrains.kotlin.name.FqName
import org.jetbrains.kotlin.name.Name
import org.jetbrains.kotlin.resolve.scopes.BaseImportingScope
import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
import org.jetbrains.kotlin.resolve.scopes.ResolutionScope
import org.jetbrains.kotlin.utils.Printer

class AllUnderImportScope(
        descriptor: DeclarationDescriptor,
        excludedImportNames: Collection
) : BaseImportingScope(null) {

    private val scopes: List = if (descriptor is ClassDescriptor) {
        listOf(descriptor.staticScope, descriptor.unsubstitutedInnerClassesScope)
    }
    else {
        assert(descriptor is PackageViewDescriptor) {
            "Must be class or package view descriptor: $descriptor"
        }
        listOf((descriptor as PackageViewDescriptor).memberScope)
    }

    private val excludedNames: Set = if (excludedImportNames.isEmpty()) { // optimization
        emptySet()
    }
    else {
        val fqName = DescriptorUtils.getFqNameSafe(descriptor)
        // toSet() is used here instead mapNotNullTo(hashSetOf()) because it results in not keeping empty sets as separate instances
        excludedImportNames.mapNotNull { if (it.parent() == fqName) it.shortName() else null }.toSet()
    }

    override fun getContributedDescriptors(kindFilter: DescriptorKindFilter, nameFilter: (Name) -> Boolean): List {
        val nameFilterToUse = if (excludedNames.isEmpty()) { // optimization
            nameFilter
        }
        else {
            { it !in excludedNames && nameFilter(it) }
        }

        val noPackagesKindFilter = kindFilter.withoutKinds(DescriptorKindFilter.PACKAGES_MASK)
        return scopes
                .flatMap { it.getContributedDescriptors(noPackagesKindFilter, nameFilterToUse) }
                .filter { it !is PackageViewDescriptor } // subpackages are not imported
    }

    override fun getContributedClassifier(name: Name, location: LookupLocation): ClassifierDescriptor? {
        if (name in excludedNames) return null
        return scopes.asSequence().mapNotNull { it.getContributedClassifier(name, location) }.singleOrNull()
    }

    override fun getContributedVariables(name: Name, location: LookupLocation): List {
        if (name in excludedNames) return emptyList()
        return scopes.flatMap { it.getContributedVariables(name, location) }
    }

    override fun getContributedFunctions(name: Name, location: LookupLocation): List {
        if (name in excludedNames) return emptyList()
        return scopes.flatMap { it.getContributedFunctions(name, location) }
    }

    override fun printStructure(p: Printer) {
        p.println(javaClass.simpleName)
    }
}