| /* |
| * Copyright (C) 2015 Square, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.squareup.okhttp.internal.io; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.IdentityHashMap; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import okio.Buffer; |
| import okio.ForwardingSink; |
| import okio.ForwardingSource; |
| import okio.Sink; |
| import okio.Source; |
| import org.junit.rules.TestRule; |
| import org.junit.runner.Description; |
| import org.junit.runners.model.Statement; |
| |
| /** A simple file system where all files are held in memory. Not safe for concurrent use. */ |
| public final class InMemoryFileSystem implements FileSystem, TestRule { |
| private final Map<File, Buffer> files = new LinkedHashMap<>(); |
| private final Map<Source, File> openSources = new IdentityHashMap<>(); |
| private final Map<Sink, File> openSinks = new IdentityHashMap<>(); |
| |
| @Override public Statement apply(final Statement base, Description description) { |
| return new Statement() { |
| @Override public void evaluate() throws Throwable { |
| base.evaluate(); |
| ensureResourcesClosed(); |
| } |
| }; |
| } |
| |
| public void ensureResourcesClosed() { |
| List<String> openResources = new ArrayList<>(); |
| for (File file : openSources.values()) { |
| openResources.add("Source for " + file); |
| } |
| for (File file : openSinks.values()) { |
| openResources.add("Sink for " + file); |
| } |
| if (!openResources.isEmpty()) { |
| StringBuilder builder = new StringBuilder("Resources acquired but not closed:"); |
| for (String resource : openResources) { |
| builder.append("\n * ").append(resource); |
| } |
| throw new IllegalStateException(builder.toString()); |
| } |
| } |
| |
| @Override public Source source(File file) throws FileNotFoundException { |
| Buffer result = files.get(file); |
| if (result == null) throw new FileNotFoundException(); |
| |
| final Source source = result.clone(); |
| openSources.put(source, file); |
| |
| return new ForwardingSource(source) { |
| @Override public void close() throws IOException { |
| openSources.remove(source); |
| super.close(); |
| } |
| }; |
| } |
| |
| @Override public Sink sink(File file) throws FileNotFoundException { |
| return sink(file, false); |
| } |
| |
| @Override public Sink appendingSink(File file) throws FileNotFoundException { |
| return sink(file, true); |
| } |
| |
| private Sink sink(File file, boolean appending) { |
| Buffer result = null; |
| if (appending) { |
| result = files.get(file); |
| } |
| if (result == null) { |
| result = new Buffer(); |
| } |
| files.put(file, result); |
| |
| final Sink sink = result; |
| openSinks.put(sink, file); |
| |
| return new ForwardingSink(sink) { |
| @Override public void close() throws IOException { |
| openSinks.remove(sink); |
| super.close(); |
| } |
| }; |
| } |
| |
| @Override public void delete(File file) throws IOException { |
| files.remove(file); |
| } |
| |
| @Override public boolean exists(File file) throws IOException { |
| return files.containsKey(file); |
| } |
| |
| @Override public long size(File file) { |
| Buffer buffer = files.get(file); |
| return buffer != null ? buffer.size() : 0L; |
| } |
| |
| @Override public void rename(File from, File to) throws IOException { |
| Buffer buffer = files.remove(from); |
| if (buffer == null) throw new FileNotFoundException(); |
| files.put(to, buffer); |
| } |
| |
| @Override public void deleteContents(File directory) throws IOException { |
| String prefix = directory.toString() + "/"; |
| for (Iterator<File> i = files.keySet().iterator(); i.hasNext(); ) { |
| File file = i.next(); |
| if (file.toString().startsWith(prefix)) i.remove(); |
| } |
| } |
| } |