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 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
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 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package org.hsqldb.rowio;

import org.hsqldb.lib.StringConverter;
import org.hsqldb.persist.TextFileSettings;

/**
 * This class quotes strings only if they contain the quote character or
 * the separator for the field. The quote character is doubled.
 *
 * @author Bob Preston (sqlbob@users dot sourceforge.net)
 * @version 2.3.4
 * @since 1.7.0
 */
public class RowOutputTextQuoted extends RowOutputText {

    public RowOutputTextQuoted(TextFileSettings textFileSettings) {
        super(textFileSettings);
    }

    protected String checkConvertString(String s, String sep) {

        if (textFileSettings.isAllQuoted || s.length() == 0
                || s.indexOf(textFileSettings.quoteChar) != -1
                || (sep.length() > 0 && s.contains(sep))
                || hasUnprintable(s)) {
            s = StringConverter.toQuotedString(s, textFileSettings.quoteChar,
                                               true);
        }

        return s;
    }

    private static boolean hasUnprintable(String s) {

        for (int i = 0, len = s.length(); i < len; i++) {
            if (Character.isISOControl(s.charAt(i))) {
                return true;
            }
        }

        return false;
    }
}
