Example usage for org.apache.commons.csv CSVFormat getNullString

Introduction

In this page you can find the example usage for org.apache.commons.csv CSVFormat getNullString.

Prototype

public String getNullString() 

Source Link

Document

Gets the String to convert to and from null .

Usage

From source file:com.datascience.cascading.scheme.CsvScheme.java

/**
 * Configures the Hadoop configuration for the given CSV format.
 *//*ww  w .  j a v  a  2  s  .  co m*/
private void configureReaderFormat(CSVFormat format, Configuration conf) {
    conf.set(CsvOutputFormat.CHARSET, charset);

    // If the format header was explicitly provided by the user then forward it to the record reader. If skipHeaderRecord
    // is enabled then that indicates that field names were detected. We need to ensure that headers are defined in order
    // for the CSV reader to skip the header record.
    conf.setBoolean(CsvInputFormat.STRICT_MODE, strict);
    if (format.getHeader() != null) {
        conf.setStrings(CsvInputFormat.CSV_READER_COLUMNS, format.getHeader());
    } else if (format.getSkipHeaderRecord()) {
        Fields fields = getSourceFields();
        String[] columns = new String[fields.size()];
        for (int i = 0; i < fields.size(); i++) {
            columns[i] = fields.get(i).toString();
        }
        conf.setStrings(CsvInputFormat.CSV_READER_COLUMNS, columns);
    }

    conf.setBoolean(CsvInputFormat.CSV_READER_SKIP_HEADER, format.getSkipHeaderRecord());
    conf.set(CsvInputFormat.CSV_READER_DELIMITER, String.valueOf(format.getDelimiter()));

    if (format.getRecordSeparator() != null) {
        conf.set(CsvInputFormat.CSV_READER_RECORD_SEPARATOR, format.getRecordSeparator());
    }

    if (format.getQuoteCharacter() != null) {
        conf.set(CsvInputFormat.CSV_READER_QUOTE_CHARACTER, String.valueOf(format.getQuoteCharacter()));
    }

    if (format.getQuoteMode() != null) {
        conf.set(CsvInputFormat.CSV_READER_QUOTE_MODE, format.getQuoteMode().name());
    }

    if (format.getEscapeCharacter() != null) {
        conf.set(CsvInputFormat.CSV_READER_ESCAPE_CHARACTER, String.valueOf(format.getEscapeCharacter()));
    }

    conf.setBoolean(CsvInputFormat.CSV_READER_IGNORE_EMPTY_LINES, format.getIgnoreEmptyLines());
    conf.setBoolean(CsvInputFormat.CSV_READER_IGNORE_SURROUNDING_SPACES, format.getIgnoreSurroundingSpaces());

    if (format.getNullString() != null) {
        conf.set(CsvInputFormat.CSV_READER_NULL_STRING, format.getNullString());
    }
}

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From source file:com.datascience.cascading.scheme.CsvScheme.java

/**
 * Configures the Hadoop configuration for the given CSV format.
 *//*from  w  ww.j  av a 2 s  . c  om*/
private void configureWriterFormat(CSVFormat format, Configuration conf) {
    conf.set(CsvOutputFormat.CHARSET, charset);

    // Apache CSV doesn't really handle the skipHeaderRecord flag correctly when writing output. If the skip flag is set
    // and headers are configured, headers will always be written to the output. Since we always have headers and/or
    // fields configured, we need to use the skipHeaderRecord flag to determine whether headers should be written.
    if (!format.getSkipHeaderRecord()) {
        if (format.getHeader() != null && format.getHeader().length != 0) {
            conf.setStrings(CsvOutputFormat.CSV_WRITER_COLUMNS, format.getHeader());
        } else {
            Fields fields = getSinkFields();
            String[] columns = new String[fields.size()];
            for (int i = 0; i < fields.size(); i++) {
                columns[i] = fields.get(i).toString();
            }
            conf.setStrings(CsvOutputFormat.CSV_WRITER_COLUMNS, columns);
        }
    }

    conf.setBoolean(CsvOutputFormat.CSV_WRITER_SKIP_HEADER, format.getSkipHeaderRecord());
    conf.set(CsvOutputFormat.CSV_WRITER_DELIMITER, String.valueOf(format.getDelimiter()));

    if (format.getRecordSeparator() != null) {
        conf.set(CsvOutputFormat.CSV_WRITER_RECORD_SEPARATOR, format.getRecordSeparator());
    }

    if (format.getQuoteCharacter() != null) {
        conf.set(CsvOutputFormat.CSV_WRITER_QUOTE_CHARACTER, String.valueOf(format.getQuoteCharacter()));
    }

    if (format.getQuoteMode() != null) {
        conf.set(CsvOutputFormat.CSV_WRITER_QUOTE_MODE, format.getQuoteMode().name());
    }

    if (format.getEscapeCharacter() != null) {
        conf.set(CsvOutputFormat.CSV_WRITER_ESCAPE_CHARACTER, String.valueOf(format.getEscapeCharacter()));
    }

    conf.setBoolean(CsvOutputFormat.CSV_WRITER_IGNORE_EMPTY_LINES, format.getIgnoreEmptyLines());
    conf.setBoolean(CsvOutputFormat.CSV_WRITER_IGNORE_SURROUNDING_SPACES, format.getIgnoreSurroundingSpaces());

    if (format.getNullString() != null) {
        conf.set(CsvOutputFormat.CSV_WRITER_NULL_STRING, format.getNullString());
    }
}

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