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
017package org.jetbrains.jet.lang.resolve.scopes;
018
019import com.google.common.base.Function;
020import com.google.common.collect.Collections2;
021import com.google.common.collect.Lists;
022import com.google.common.collect.Sets;
023import org.jetbrains.annotations.NotNull;
024import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
025import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
026import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
027import org.jetbrains.jet.lang.descriptors.ReceiverParameterDescriptor;
028import org.jetbrains.jet.lang.resolve.BindingTrace;
029import org.jetbrains.jet.lang.resolve.DescriptorResolver;
030import org.jetbrains.jet.lang.resolve.TraceBasedRedeclarationHandler;
031import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverValue;
032
033import java.util.Collection;
034import java.util.List;
035import java.util.Set;
036
037public final class JetScopeUtils {
038    private JetScopeUtils() {}
039
040    public static List<ReceiverValue> getImplicitReceiversHierarchyValues(@NotNull JetScope scope) {
041        Collection<ReceiverParameterDescriptor> hierarchy = scope.getImplicitReceiversHierarchy();
042
043        return Lists.newArrayList(
044                Collections2.transform(hierarchy,
045                       new Function<ReceiverParameterDescriptor, ReceiverValue>() {
046                           @Override
047                           public ReceiverValue apply(ReceiverParameterDescriptor receiverParameterDescriptor) {
048                               return receiverParameterDescriptor.getValue();
049                           }
050                       })
051        );
052    }
053
054    /**
055     * Get all extension descriptors among visible descriptors for current scope.
056     *
057     * @param scope Scope for query extensions.
058     * @return extension descriptors.
059     */
060    public static Collection<CallableDescriptor> getAllExtensions(@NotNull JetScope scope) {
061        Set<CallableDescriptor> result = Sets.newHashSet();
062
063        for (DeclarationDescriptor descriptor : scope.getAllDescriptors()) {
064            if (descriptor instanceof CallableDescriptor) {
065                CallableDescriptor callDescriptor = (CallableDescriptor) descriptor;
066                if (callDescriptor.getReceiverParameter() != null) {
067                    result.add(callDescriptor);
068                }
069            }
070        }
071
072        return result;
073    }
074
075    public static JetScope makeScopeForPropertyAccessor(
076            @NotNull PropertyDescriptor propertyDescriptor,
077            @NotNull JetScope parentScope,
078            @NotNull DescriptorResolver descriptorResolver,
079            @NotNull BindingTrace trace
080    ) {
081        JetScope propertyDeclarationInnerScope = descriptorResolver
082                .getPropertyDeclarationInnerScope(propertyDescriptor, parentScope,
083                                                  propertyDescriptor.getTypeParameters(),
084                                                  propertyDescriptor.getReceiverParameter(), trace);
085        WritableScope accessorScope = new WritableScopeImpl(propertyDeclarationInnerScope, parentScope.getContainingDeclaration(),
086                                                            new TraceBasedRedeclarationHandler(trace), "Accessor Scope");
087        accessorScope.changeLockLevel(WritableScope.LockLevel.READING);
088
089        return accessorScope;
090    }
091
092}