liquibase.util.csv.opencsv.bean
Interface CsvToBeanFilter
public interface CsvToBeanFilter
Here's an example showing how to use CsvToBean
with a column
name mapping and line filtering. It assumes that there is a class named
Feature
defined with setters setName(String)
and
setState(String)
. The FEATURE_NAME and STATE columns in the
CSV file will be used. Any additional columns will be ignored. The filter
will eliminate any lines where the STATE value is "production".
private class StateFilter implements CsvToBeanFilter {
private final MappingStrategy strategy;
public NonProductionFilter(MappingStrategy strategy) {
this.strategy = strategy;
}
public boolean allowLine(String[] line) {
int index = strategy.getColumnIndex("STATE");
String value = line[index];
boolean result = !"production".equals(value);
return result;
}
}
public List<Feature> parseCsv(InputStreamReader streamReader) {
HeaderColumnNameTranslateMappingStrategy<Feature> strategy = new HeaderColumnNameTranslateMappingStrategy();
Map<String, String> columnMap = new HashMap();
columnMap.put("FEATURE_NAME", "name");
columnMap.put("STATE", "state");
strategy.setColumnMapping(columnMap);
strategy.setType(Feature.class);
CSVReader reader = new CSVReader(streamReader);
CsvToBeanFilter filter = new StateFilter(strategy);
return new CsvToBean().parse(strategy, reader, filter);
}
Method Summary |
boolean |
allowLine(String[] line)
Determines if a line from the CSV file will be included in the
output of CsvToBean . |
allowLine
boolean allowLine(String[] line)
- Determines if a line from the CSV file will be included in the
output of
CsvToBean
. If the CSV file has a header row, it
may be useful for implementations to call
MappingStrategy.getColumnIndex(java.lang.String)
to identify the correct column
indexes to examine.
- Parameters:
line
- a line of data from the CSV file
- Returns:
- true if the line is to be included in the output. Otherwise,
false.
Copyright © 2016 Liquibase.org. All rights reserved.