kotlin.reflect.jvm.internal.impl.resolve.scopes.ChainedScope.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 kotlin.reflect.jvm.internal.impl.resolve.scopes

import kotlin.reflect.jvm.internal.impl.descriptors.*
import kotlin.reflect.jvm.internal.impl.name.Name
import kotlin.reflect.jvm.internal.impl.utils.Printer
import java.util.*
import kotlin.reflect.jvm.internal.impl.resolve.scopes.JetScopeSelectorUtil.*

public open class ChainedScope(
        private val containingDeclaration: DeclarationDescriptor?/* it's nullable as a hack for TypeUtils.intersect() */,
        private val debugName: String,
        vararg scopes: JetScope
) : JetScope {
    private val scopeChain = scopes.clone()
    private var implicitReceiverHierarchy: List? = null

    override fun getClassifier(name: Name): ClassifierDescriptor?
            = getFirstMatch(scopeChain, name, CLASSIFIER_DESCRIPTOR_SCOPE_SELECTOR)

    override fun getPackage(name: Name): PackageViewDescriptor?
            = getFirstMatch(scopeChain, name, PACKAGE_SCOPE_SELECTOR)

    override fun getProperties(name: Name): Set
            = getFromAllScopes(scopeChain, name, NAMED_PROPERTIES_SCOPE_SELECTOR)

    override fun getLocalVariable(name: Name): VariableDescriptor?
            = getFirstMatch(scopeChain, name, VARIABLE_DESCRIPTOR_SCOPE_SELECTOR)

    override fun getFunctions(name: Name): Set
            = getFromAllScopes(scopeChain, name, NAMED_FUNCTION_SCOPE_SELECTOR)

    override fun getImplicitReceiversHierarchy(): List {
        if (implicitReceiverHierarchy == null) {
            val result = ArrayList()
            scopeChain.flatMapTo(result) { it.getImplicitReceiversHierarchy() }
            result.trimToSize()
            implicitReceiverHierarchy = result
        }
        return implicitReceiverHierarchy!!
    }

    override fun getContainingDeclaration(): DeclarationDescriptor = containingDeclaration!!

    override fun getDeclarationsByLabel(labelName: Name) = scopeChain.flatMap { it.getDeclarationsByLabel(labelName) }

    override fun getDescriptors(kindFilter: DescriptorKindFilter,
                                nameFilter: (Name) -> Boolean): Collection {
        val result = LinkedHashSet()
        scopeChain.flatMapTo(result) { it.getDescriptors(kindFilter, nameFilter) }
        return result
    }

    override fun getOwnDeclaredDescriptors(): Collection {
        throw UnsupportedOperationException()
    }

    override fun toString() = debugName

    override fun printScopeStructure(p: Printer) {
        p.println(javaClass.getSimpleName(), ": ", debugName, " {")
        p.pushIndent()

        for (scope in scopeChain) {
            scope.printScopeStructure(p)
        }

        p.popIndent()
        p.println("}")
    }
}