android_webview/native/input_stream_impl.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef ANDROID_WEBVIEW_NATIVE_INPUT_STREAM_H_
   6 #define ANDROID_WEBVIEW_NATIVE_INPUT_STREAM_H_
   7
   8 #include "android_webview/browser/input_stream.h"
   9 #include "base/android/scoped_java_ref.h"
  10 #include "base/compiler_specific.h"
  11
  12 namespace net {
  13 class IOBuffer;
  14 }
  15
  16 namespace android_webview {
  17
  18 class InputStreamImpl : public InputStream {
  19  public:
  20   // Maximum size of |buffer_|.
  21   static const int kBufferSize;
  22
  23   static const InputStreamImpl* FromInputStream(
  24       const InputStream* input_stream);
  25
  26   // |stream| should be an instance of the InputStream Java class.
  27   // |stream| can't be null.
  28   InputStreamImpl(const base::android::JavaRef<jobject>& stream);
  29   virtual ~InputStreamImpl();
  30
  31   // Gets the underlying Java object. Guaranteed non-NULL.
  32   const jobject jobj() const { return jobject_.obj(); }
  33
  34   // InputStream implementation.
  35   virtual bool BytesAvailable(int* bytes_available) const override;
  36   virtual bool Skip(int64_t n, int64_t* bytes_skipped) override;
  37   virtual bool Read(net::IOBuffer* dest, int length, int* bytes_read) override;
  38  protected:
  39   // Parameterless constructor exposed for testing.
  40   InputStreamImpl();
  41
  42  private:
  43   base::android::ScopedJavaGlobalRef<jobject> jobject_;
  44   base::android::ScopedJavaGlobalRef<jbyteArray> buffer_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(InputStreamImpl);
  47 };
  48
  49 bool RegisterInputStream(JNIEnv* env);
  50
  51 } // namespace android_webview
  52
  53 #endif //  ANDROID_WEBVIEW_NATIVE_INPUT_STREAM_H_