// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.vfs.inmemoryfs;

import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
import com.google.devtools.build.lib.util.Clock;

import java.io.IOException;
import java.io.OutputStream;

/**
 * This interface represents a mutable file stored in an InMemoryFileSystem.
 */
@ThreadSafe
public abstract class FileInfo extends InMemoryContentInfo {
  protected FileInfo(Clock clock) {
    super(clock);
  }

  @Override
  public boolean isDirectory() {
    return false;
  }

  @Override
  public boolean isSymbolicLink() {
    return false;
  }

  @Override
  public boolean isFile() {
    return true;
  }

  @Override
  public boolean isSpecialFile() {
    return false;
  }

  protected abstract byte[] readContent() throws IOException;

  protected abstract OutputStream getOutputStream(boolean append) throws IOException;
}