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.cli.jvm.compiler;
018    
019    import com.intellij.openapi.vfs.VirtualFile;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.lang.resolve.kotlin.VirtualFileFinder;
023    import org.jetbrains.jet.lang.resolve.kotlin.VirtualFileKotlinClassFinder;
024    import org.jetbrains.jet.lang.resolve.name.FqName;
025    
026    public class CliVirtualFileFinder extends VirtualFileKotlinClassFinder implements VirtualFileFinder {
027    
028        @NotNull
029        private final ClassPath classPath;
030    
031        public CliVirtualFileFinder(@NotNull ClassPath path) {
032            classPath = path;
033        }
034    
035        @Nullable
036        @Override
037        public VirtualFile findVirtualFile(@NotNull FqName className) {
038            for (VirtualFile root : classPath) {
039                VirtualFile fileInRoot = findFileInRoot(className.asString(), root);
040                if (fileInRoot != null) {
041                    return fileInRoot;
042                }
043            }
044            return null;
045        }
046    
047        //NOTE: copied with some changes from CoreJavaFileManager
048        @Nullable
049        private VirtualFile findFileInRoot(@NotNull String qName, @NotNull VirtualFile root) {
050            String pathRest = qName;
051            VirtualFile cur = root;
052    
053            while (true) {
054                int dot = pathRest.indexOf('.');
055                if (dot < 0) break;
056    
057                String pathComponent = pathRest.substring(0, dot);
058                VirtualFile child = cur.findChild(pathComponent);
059    
060                if (child == null) break;
061                pathRest = pathRest.substring(dot + 1);
062                cur = child;
063            }
064    
065            String className = pathRest.replace('.', '$');
066            VirtualFile vFile = cur.findChild(className + ".class");
067            if (vFile != null) {
068                if (!vFile.isValid()) {
069                    //TODO: log
070                    return null;
071                }
072                //NOTE: currently we use VirtualFileFinder to find Kotlin binaries only
073                if (createKotlinClass(vFile).getClassHeader() != null) {
074                    return vFile;
075                }
076            }
077            return null;
078        }
079    }