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Qore CsvUtil Module Reference 1.10.1
CsvWriteDataProvider.qc.dox.h
1 // -*- mode: c++; indent-tabs-mode: nil -*-
2 // Qore CsvWriteDataProvider class definition
3 
4 /* CsvWriteDataProvider.qc Copyright 2012 - 2023 Qore Technologies, s.r.o.
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24 
25 // assume local var scope, do not use "$" for vars, members, and method calls
26 
28 namespace CsvUtil {
30 class CsvWriteDataProvider : public DataProvider::AbstractDataProvider {
31 
32 public:
34  const ProviderInfo = <DataProviderInfo>{
35  "type": "CsvWriteDataProvider",
36  "supports_create": True,
37  "has_record": True,
38  "constructor_options": ConstructorOptions,
39  };
40 
43  "path": <DataProviderOptionInfo>{
44  "type": AbstractDataProviderType::get(StringType),
45  "desc": "the location for the output CSV data file; mutually exclusive with \"stream\"; the output "
46  "location is handled by a call to FileLocationHandler::getOutputStreamForLocation()",
47  },
48  "stream": <DataProviderOptionInfo>{
49  "type": AbstractDataProviderType::get(new Type("OutputStream")),
50  "desc": "an output stream for CSV data; mutually exclusive with \"path\"",
51  },
52  "block": <DataProviderOptionInfo>{
53  "type": AbstractDataProviderType::get(SoftIntType),
54  "desc": "the block size when generating bulk output",
55  },
56  "datamap": <DataProviderOptionInfo>{
57  "type": AbstractDataProviderType::get(AutoHashType),
58  "desc": "a hash mapping actual data key names to the output field names, for use in case the data "
59  "field names differ; does not have to include every data or output key; keys not present will be "
60  "assumed to be mapped 1:1",
61  },
62  "date_format": <DataProviderOptionInfo>{
63  "type": AbstractDataProviderType::get(StringType),
64  "desc": "the default mask for date value formatting",
65  },
66  "encoding": <DataProviderOptionInfo>{
67  "type": AbstractDataProviderType::get(StringType),
68  "desc": "the character encoding for the data",
69  },
70  "eol": <DataProviderOptionInfo>{
71  "type": AbstractDataProviderType::get(StringType),
72  "desc": "the end of line / record character(s)",
73  },
74  "fields": <DataProviderOptionInfo>{
75  "type": AbstractDataProviderType::get(AutoHashType),
76  "desc": "describes the data to be output",
77  },
78  "headers": <DataProviderOptionInfo>{
79  "type": AbstractDataProviderType::get(new Type("softlist<string>")),
80  "desc": "list of field header / column names for the data iterated",
81  },
82  "header_reorder": <DataProviderOptionInfo>{
83  "type": AbstractDataProviderType::get(SoftBoolType),
84  "desc": "if `true` (the default) then if `headers` are provided, then data fields are reordered to "
85  "follow headers",
86  },
87  "optimal_quotes": <DataProviderOptionInfo>{
88  "type": AbstractDataProviderType::get(SoftBoolType),
89  "desc": "set to `false` to disable optimal quoting; when optimal quoting is disabled, all fields are "
90  "quoted regardless of type or content, when it is enabled, then fields are quoted only if they "
91  "require quoting (i.e. they contain a quote or separator character); the default is `true`",
92  },
93  "quote": <DataProviderOptionInfo>{
94  "type": AbstractDataProviderType::get(StringType),
95  "desc": "the quote character to quote fields (default: `\"`)",
96  },
97  "quote_escape": <DataProviderOptionInfo>{
98  "type": AbstractDataProviderType::get(StringType),
99  "desc": "escape character(s) used for `quote` (default: `\\`)",
100  },
101  "separator": <DataProviderOptionInfo>{
102  "type": AbstractDataProviderType::get(StringType),
103  "desc": "string separating fields in the data (default: `,`)",
104  },
105  "verify_columns": <DataProviderOptionInfo>{
106  "type": AbstractDataProviderType::get(SoftBoolType),
107  "desc": "if `true` (the default is `false`) then if a line is parsed with a different column count "
108  "than other lines, a `CSVFILEWRITER-DATA-ERROR` exception is thrown",
109  },
110  "write_headers": <DataProviderOptionInfo>{
111  "type": AbstractDataProviderType::get(SoftBoolType),
112  "desc": "set to `false` to suppress the output of headers; the default is `true`, meaning to output "
113  "headers if they are present",
114  },
115  };
116 
118  const CsvGenerationOptionList = keys (ConstructorOptions - ("path", "stream"));
119 
120 protected:
123 
124 public:
125 
127 
132  constructor(string path, *hash<auto> opts);
133 
134 
136 
141  constructor(OutputStream stream, *hash<auto> opts);
142 
143 
145  string getName();
146 
147 
149  constructor(*hash<auto> options);
150 
151 
153 protected:
154  *hash<string, AbstractDataField> getRecordTypeImpl(*hash<auto> search_options);
155 public:
156 
157 
159 
164 protected:
165  *hash<auto> createRecordImpl(hash<auto> rec, *hash<auto> create_options);
166 public:
167 
168 
170 protected:
171  hash<DataProviderInfo> getStaticInfoImpl();
172 public:
173 
174 };
175 }; // CsvUtil namespace
The AbstractCsvWriter class provides a parent for all CSV writers.
Definition: AbstractCsvWriter.qc.dox.h:139
Provides a data provider for reading CSV files.
Definition: CsvWriteDataProvider.qc.dox.h:30
const ConstructorOptions
Constructor options.
Definition: CsvWriteDataProvider.qc.dox.h:42
const ProviderInfo
Provider info.
Definition: CsvWriteDataProvider.qc.dox.h:34
AbstractCsvWriter writer
the writer object
Definition: CsvWriteDataProvider.qc.dox.h:122
*hash< auto > createRecordImpl(hash< auto > rec, *hash< auto > create_options)
Creates the given record to the data provider.
hash< DataProviderInfo > getStaticInfoImpl()
Returns data provider static info.
constructor(OutputStream stream, *hash< auto > opts)
Creates the CsvWriteDataProvider with the output data stream where data will be writeen and an option...
*hash< string, AbstractDataField > getRecordTypeImpl(*hash< auto > search_options)
Returns the description of the record type, if any.
const CsvGenerationOptionList
CSV generation option list.
Definition: CsvWriteDataProvider.qc.dox.h:118
constructor(*hash< auto > options)
Creates the object from constructor options.
string getName()
Returns the object name.
constructor(string path, *hash< auto > opts)
Creates the CsvWriteDataProvider with the output path and optionally an option hash.
const True
the CsvUtil namespace. All classes used in the CsvUtil module should be inside this namespace
Definition: AbstractCsvIterator.qc.dox.h:28