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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_SOURCE_H__
#define GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_SOURCE_H__
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/stubs/stringpiece.h>
#include <google/protobuf/stubs/status.h>
namespace google {
namespace protobuf {
namespace util {
namespace converter {
class ObjectWriter;
// An ObjectSource is anything that can write to an ObjectWriter.
// Implementation of this interface typically provide constructors or
// factory methods to create an instance based on some source data, for
// example, a character stream, or protobuf.
//
// Derived classes could be thread-unsafe.
class LIBPROTOBUF_EXPORT ObjectSource {
public:
virtual ~ObjectSource() {}
// Writes to the ObjectWriter
virtual util::Status WriteTo(ObjectWriter* ow) const {
return NamedWriteTo("", ow);
}
// Writes to the ObjectWriter with a custom name for the message.
// This is useful when you chain ObjectSource together by embedding one
// within another.
virtual util::Status NamedWriteTo(StringPiece name,
ObjectWriter* ow) const = 0;
protected:
ObjectSource() {}
private:
// Do not add any data members to this class.
GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ObjectSource);
};
} // namespace converter
} // namespace util
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_UTIL_CONVERTER_OBJECT_SOURCE_H__