1// Protocol Buffers - Google's data interchange format
2// Copyright 2008 Google Inc.  All rights reserved.
3// https://developers.google.com/protocol-buffers/
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30
31#ifndef GOOGLE_PROTOBUF_UTIL_CONVERTER_ERROR_LISTENER_H__
32#define GOOGLE_PROTOBUF_UTIL_CONVERTER_ERROR_LISTENER_H__
33
34#include <algorithm>
35#include <memory>
36#ifndef _SHARED_PTR_H
37#include <google/protobuf/stubs/shared_ptr.h>
38#endif
39#include <string>
40#include <vector>
41
42#include <google/protobuf/stubs/callback.h>
43#include <google/protobuf/stubs/common.h>
44#include <google/protobuf/stubs/logging.h>
45#include <google/protobuf/util/internal/location_tracker.h>
46#include <google/protobuf/stubs/stringpiece.h>
47
48namespace google {
49namespace protobuf {
50namespace util {
51namespace converter {
52
53// Interface for error listener.
54class LIBPROTOBUF_EXPORT ErrorListener {
55 public:
56  virtual ~ErrorListener() {}
57
58  // Reports an invalid name at the given location.
59  virtual void InvalidName(const LocationTrackerInterface& loc,
60                           StringPiece unknown_name, StringPiece message) = 0;
61
62  // Reports an invalid value for a field.
63  virtual void InvalidValue(const LocationTrackerInterface& loc,
64                            StringPiece type_name, StringPiece value) = 0;
65
66  // Reports a missing required field.
67  virtual void MissingField(const LocationTrackerInterface& loc,
68                            StringPiece missing_name) = 0;
69
70 protected:
71  ErrorListener() {}
72
73 private:
74  // Do not add any data members to this class.
75  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ErrorListener);
76};
77
78// An error listener that ignores all errors.
79class LIBPROTOBUF_EXPORT NoopErrorListener : public ErrorListener {
80 public:
81  NoopErrorListener() {}
82  virtual ~NoopErrorListener() {}
83
84  virtual void InvalidName(const LocationTrackerInterface& loc,
85                           StringPiece unknown_name, StringPiece message) {}
86
87  virtual void InvalidValue(const LocationTrackerInterface& loc,
88                            StringPiece type_name, StringPiece value) {}
89
90  virtual void MissingField(const LocationTrackerInterface& loc,
91                            StringPiece missing_name) {}
92
93 private:
94  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(NoopErrorListener);
95};
96
97
98}  // namespace converter
99}  // namespace util
100}  // namespace protobuf
101
102}  // namespace google
103#endif  // GOOGLE_PROTOBUF_UTIL_CONVERTER_ERROR_LISTENER_H__
104