001    /*
002     * Copyright 2010-2015 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.kotlin.psi;
018    
019    import com.google.common.base.Function;
020    import com.google.common.collect.Collections2;
021    import com.google.common.collect.Maps;
022    import com.intellij.openapi.project.Project;
023    import org.jetbrains.annotations.NotNull;
024    import org.jetbrains.annotations.Nullable;
025    import org.jetbrains.kotlin.resolve.ImportPath;
026    
027    import java.util.Collection;
028    import java.util.Map;
029    
030    public class KtImportsFactory {
031        @NotNull private final Project project;
032    
033        private final Map<ImportPath, KtImportDirective> importsCache = Maps.newHashMap();
034    
035        public KtImportsFactory(@NotNull Project project) {
036            this.project = project;
037        }
038    
039        @NotNull
040        public KtImportDirective createImportDirective(@NotNull ImportPath importPath) {
041            KtImportDirective directive = importsCache.get(importPath);
042            if (directive != null) {
043                return directive;
044            }
045    
046            KtImportDirective createdDirective = KtPsiFactoryKt.KtPsiFactory(project).createImportDirective(importPath);
047            importsCache.put(importPath, createdDirective);
048    
049            return createdDirective;
050        }
051    
052        @NotNull
053        public Collection<KtImportDirective> createImportDirectives(@NotNull Collection<ImportPath> importPaths) {
054            return Collections2.transform(importPaths,
055                                          new Function<ImportPath, KtImportDirective>() {
056                                              @Override
057                                              public KtImportDirective apply(@Nullable ImportPath path) {
058                                                  assert path != null;
059                                                  return createImportDirective(path);
060                                              }
061                                          });
062        }
063    }