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.lazy.descriptors;
018    
019    import com.google.common.collect.Iterables;
020    import com.intellij.psi.NavigatablePsiElement;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.jet.lang.descriptors.NamespaceDescriptor;
023    import org.jetbrains.jet.lang.descriptors.annotations.AnnotationDescriptor;
024    import org.jetbrains.jet.lang.descriptors.impl.AbstractNamespaceDescriptorImpl;
025    import org.jetbrains.jet.lang.descriptors.impl.NamespaceDescriptorParent;
026    import org.jetbrains.jet.lang.resolve.BindingContext;
027    import org.jetbrains.jet.lang.resolve.DescriptorUtils;
028    import org.jetbrains.jet.lang.resolve.lazy.ForceResolveUtil;
029    import org.jetbrains.jet.lang.resolve.lazy.LazyDescriptor;
030    import org.jetbrains.jet.lang.resolve.lazy.ResolveSession;
031    import org.jetbrains.jet.lang.resolve.lazy.declarations.PackageMemberDeclarationProvider;
032    import org.jetbrains.jet.lang.resolve.name.FqName;
033    import org.jetbrains.jet.lang.resolve.name.Name;
034    import org.jetbrains.jet.lang.resolve.scopes.*;
035    
036    import java.util.Collections;
037    
038    public class LazyPackageDescriptor extends AbstractNamespaceDescriptorImpl implements LazyDescriptor, NamespaceDescriptor {
039        private final JetScope memberScope;
040        private final JetScope lazyScope;
041    
042        public LazyPackageDescriptor(
043                @NotNull NamespaceDescriptorParent containingDeclaration,
044                @NotNull Name name,
045                @NotNull ResolveSession resolveSession,
046                @NotNull PackageMemberDeclarationProvider declarationProvider
047        ) {
048            super(containingDeclaration, Collections.<AnnotationDescriptor>emptyList(), name);
049    
050            WritableScopeImpl scope = new WritableScopeImpl(JetScope.EMPTY, this, RedeclarationHandler.DO_NOTHING, "Package scope");
051            resolveSession.getRootModuleDescriptor().getModuleConfiguration().extendNamespaceScope(resolveSession.getTrace(), this, scope);
052            scope.changeLockLevel(WritableScope.LockLevel.READING);
053    
054            this.lazyScope = new LazyPackageMemberScope(resolveSession, declarationProvider, this);
055    
056            this.memberScope = new ChainedScope(this, "Lazy package members scope: " + name, lazyScope, scope);
057    
058            NavigatablePsiElement declaration = Iterables.getFirst(declarationProvider.getPackageDeclarations(getFqName()), null);
059            if (declaration != null) {
060                resolveSession.getTrace().record(BindingContext.NAMESPACE, declaration, this);
061            }
062        }
063    
064        @NotNull
065        @Override
066        public JetScope getMemberScope() {
067            return memberScope;
068        }
069    
070        @NotNull
071        @Override
072        public FqName getFqName() {
073            return DescriptorUtils.getFQName(this).toSafe();
074        }
075    
076        @Override
077        public void addNamespace(@NotNull NamespaceDescriptor namespaceDescriptor) {
078            throw new UnsupportedOperationException(); // TODO
079        }
080    
081        @Override
082        public void forceResolveAllContents() {
083            ForceResolveUtil.forceResolveAllContents(lazyScope);
084        }
085    }