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.psi;
018
019import com.google.common.base.Function;
020import com.google.common.collect.Collections2;
021import com.google.common.collect.Maps;
022import com.intellij.openapi.project.Project;
023import org.jetbrains.annotations.NotNull;
024import org.jetbrains.annotations.Nullable;
025import org.jetbrains.jet.lang.resolve.ImportPath;
026
027import javax.inject.Inject;
028import java.util.Collection;
029import java.util.Map;
030
031public class JetImportsFactory {
032    @NotNull
033    private Project project;
034
035    private final Map<ImportPath, JetImportDirective> importsCache = Maps.newHashMap();
036
037    @Inject
038    public void setProject(@NotNull Project project) {
039        importsCache.clear();
040        this.project = project;
041    }
042
043    @NotNull
044    public JetImportDirective createImportDirective(@NotNull ImportPath importPath) {
045        JetImportDirective directive = importsCache.get(importPath);
046        if (directive != null) {
047            return directive;
048        }
049
050        JetImportDirective createdDirective = JetPsiFactory.createImportDirective(project, importPath);
051        importsCache.put(importPath, createdDirective);
052
053        return createdDirective;
054    }
055
056    @NotNull
057    public Collection<JetImportDirective> createImportDirectives(@NotNull Collection<ImportPath> importPaths) {
058        return Collections2.transform(importPaths,
059                                      new Function<ImportPath, JetImportDirective>() {
060                                          @Override
061                                          public JetImportDirective apply(@Nullable ImportPath path) {
062                                              assert path != null;
063                                              return createImportDirective(path);
064                                          }
065                                      });
066    }
067}