1 files changed, 121 insertions, 0 deletions
diff --git a/jimfs/src/main/java/com/google/common/jimfs/FileFactory.java b/jimfs/src/main/java/com/google/common/jimfs/FileFactory.java
new file mode 100644
index 0000000..e26d41d
--- /dev/null
+++ b/jimfs/src/main/java/com/google/common/jimfs/FileFactory.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2013 Google 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.google.common.jimfs;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Supplier;
+import java.io.IOException;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * Factory for creating new files and copying files. One piece of the file store implementation.
+ *
+ * @author Colin Decker
+ */
+final class FileFactory {
+
+  private final AtomicInteger idGenerator = new AtomicInteger();
+
+  private final HeapDisk disk;
+
+  /** Creates a new file factory using the given disk for regular files. */
+  public FileFactory(HeapDisk disk) {
+    this.disk = checkNotNull(disk);
+  }
+
+  private int nextFileId() {
+    return idGenerator.getAndIncrement();
+  }
+
+  /** Creates a new directory. */
+  public Directory createDirectory() {
+    return Directory.create(nextFileId());
+  }
+
+  /** Creates a new root directory with the given name. */
+  public Directory createRootDirectory(Name name) {
+    return Directory.createRoot(nextFileId(), name);
+  }
+
+  /** Creates a new regular file. */
+  @VisibleForTesting
+  RegularFile createRegularFile() {
+    return RegularFile.create(nextFileId(), disk);
+  }
+
+  /** Creates a new symbolic link referencing the given target path. */
+  @VisibleForTesting
+  SymbolicLink createSymbolicLink(JimfsPath target) {
+    return SymbolicLink.create(nextFileId(), target);
+  }
+
+  /** Creates and returns a copy of the given file. */
+  public File copyWithoutContent(File file) throws IOException {
+    return file.copyWithoutContent(nextFileId());
+  }
+
+  // suppliers to act as file creation callbacks
+
+  private final Supplier<Directory> directorySupplier = new DirectorySupplier();
+
+  private final Supplier<RegularFile> regularFileSupplier = new RegularFileSupplier();
+
+  /** Returns a supplier that creates directories. */
+  public Supplier<Directory> directoryCreator() {
+    return directorySupplier;
+  }
+
+  /** Returns a supplier that creates regular files. */
+  public Supplier<RegularFile> regularFileCreator() {
+    return regularFileSupplier;
+  }
+
+  /** Returns a supplier that creates a symbolic links to the given path. */
+  public Supplier<SymbolicLink> symbolicLinkCreator(JimfsPath target) {
+    return new SymbolicLinkSupplier(target);
+  }
+
+  private final class DirectorySupplier implements Supplier<Directory> {
+    @Override
+    public Directory get() {
+      return createDirectory();
+    }
+  }
+
+  private final class RegularFileSupplier implements Supplier<RegularFile> {
+    @Override
+    public RegularFile get() {
+      return createRegularFile();
+    }
+  }
+
+  private final class SymbolicLinkSupplier implements Supplier<SymbolicLink> {
+
+    private final JimfsPath target;
+
+    protected SymbolicLinkSupplier(JimfsPath target) {
+      this.target = checkNotNull(target);
+    }
+
+    @Override
+    public SymbolicLink get() {
+      return createSymbolicLink(target);
+    }
+  }
+}