package jk;

import java.io.IOException;
import java.io.OutputStream;

import org.jetel.component.AbstractGenericTransform;
import org.jetel.data.DataField;
import org.jetel.data.DataRecord;
import org.jetel.exception.JetelRuntimeException;

/**
 * This is an example custom writer. It shows how you can write string
 * representations of fields into file.
 */
public class CustomJavaWriterExample01 extends AbstractGenericTransform {
    @Override
    public void execute() {
        String fileUrl = getProperties().getStringProperty("FileUrl");
        DataRecord record;

        try (OutputStream os = getOutputStream(fileUrl, false)) {
            while ((record = readRecordFromPort(0)) != null) {
                StringBuffer sb = new StringBuffer();
                DataField[] dataFields = record.getFields();

                int fieldCount = 1;
                for (DataField df : dataFields) {
                    sb.append(df.getValue() != null ? df.getValue().toString() : "");
                    if (df.getMetadata().getDelimiter() != null) {
                        sb.append(df.getMetadata().getDelimiter());
                    } else {
                        if (fieldCount != dataFields.length) {
                            sb.append(record.getMetadata().getFieldDelimiter());
                        }
                    }
                    ++fieldCount;
                }
                sb.append(record.getMetadata().getRecordDelimiter());
                os.write(sb.toString().getBytes("UTF-8"));
            }
        } catch (IOException e) {
            throw new JetelRuntimeException(e);
        }
    }
}