Module datarush.library

Package com.pervasive.datarush.schema

Interface TextRecordDiscoverer

All Known Implementing Classes:

JsonPatternBasedDiscovery, PatternBasedDiscovery

public interface TextRecordDiscoverer

A generator of text record schemas. A TextRecordDiscoverer can be used with delimited text data to produce schemas for reading and writing.

Method Summary

Modifier and Type	Method	Description
TextRecord	discoverForRead(List<List<String>> rows, boolean containsHeader, TextConversionDefaults defaults)	Constructs a schema for reading based on the given file analysis.
TextRecord	generateForWrite(RecordTokenType recordTokenType, TextConversionDefaults defaults)	Constructs a schema for writing based on the given record type.

Method Detail

discoverForRead

TextRecord discoverForRead(List<List<String>> rows,
                           boolean containsHeader,
                           TextConversionDefaults defaults)

Constructs a schema for reading based on the given file analysis. The analysis may or may not include a header row, as indicated.

Parameters:

rows - the analyzed rows from a text file

containsHeader - indicates whether the first row of the analyzed file is a header

defaults - defaults for the discovered schema

Returns:

a schema appropriate for reading the file.

generateForWrite

TextRecord generateForWrite(RecordTokenType recordTokenType,
                            TextConversionDefaults defaults)

Constructs a schema for writing based on the given record type.

Parameters:

recordTokenType - the record type of the data

defaults - defaults for the discovered schema

Returns:

a schema appropriate for writing data of the given type