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Write with custom fields #521

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Write with custom fields #521

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16 changes: 16 additions & 0 deletions src/main/java/com/univocity/parsers/fixed/FixedWidthWriter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,8 @@ public class FixedWidthWriter extends AbstractWriter<FixedWidthWriterSettings> {
private boolean[] rootIgnore;
private int ignoreCount;

private FixedWidthFields customFields = null;


private char[] rootPaddings;
private boolean defaultHeaderPadding;
Expand Down Expand Up @@ -183,6 +185,12 @@ protected final void initialize(FixedWidthWriterSettings settings) {
}
}

public void writeRowWithCustomFields(Object[] row, FixedWidthFields customFields) {
this.customFields = customFields;
super.writeRow(row);
this.customFields = null;
}

@Override
protected void processRow(Object[] row) {
if (row.length > 0 && lookaheadFormats != null || lookbehindFormats != null) {
Expand Down Expand Up @@ -256,6 +264,14 @@ protected void processRow(Object[] row) {
}
}

if (customFields == null) {
buildRow(row, fieldLengths, fieldAlignments, fieldPaddings, ignore);
} else {
buildRow(row, customFields.getFieldLengths(), customFields.getFieldAlignments(), customFields.getFieldPaddings(), customFields.getFieldsToIgnore());
}
}

private void buildRow(Object[] row, int[] fieldLengths, FieldAlignment[] fieldAlignments, char[] fieldPaddings, boolean[] ignore) {
if (expandRows) {
row = expand(row, fieldLengths.length - ignoreCount, null);
}
Expand Down
54 changes: 54 additions & 0 deletions src/test/java/com/univocity/parsers/fixed/FixedWidthWriterTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,60 @@ public void testWriter(char[] lineSeparator) throws Exception {
}
}

@Test(enabled = true, dataProvider = "lineSeparatorProvider")
public void testWriterWithCustomFields(char[] lineSeparator) throws Exception {
String[] expectedHeaders = new String[]{
"DATE", "NAME", "OWED", "INTEREST",
};

String[][] input = new String[][]{
{"2013-FEB-27", "Standard padding", "1.00", "1.000", "- 5 -",},
{"2013-FEB-28", "Custom padding", "12345.99", "1.234", "- 5 -",},
{"2013-FEB-28", "Standard padding", "15000.99", "8.786", "- 5 -",},

};

String lineSeparatorString = new String(lineSeparator);
String expectedResult = "DATE-------NAME----------------------------------OWED----------------INTEREST" + lineSeparatorString
+ "2013-FEB-27Standard padding----------------------1.00----------------1.000---" + lineSeparatorString
+ "2013-FEB-28**** Custom padding000000012345.99*****1.234*****" + lineSeparatorString
+ "2013-FEB-28Standard padding----------------------15000.99------------8.786---" + lineSeparatorString;

FixedWidthFields customFields = new FixedWidthFields()
.addField("1", 15, FieldAlignment.LEFT, '*')
.addField("2", 15, FieldAlignment.RIGHT, ' ')
.addField("3", 15, FieldAlignment.RIGHT, '0')
.addField("4", 15, FieldAlignment.CENTER, '*');

FixedWidthWriterSettings settings = new FixedWidthWriterSettings(getFieldLengths());
settings.getFormat().setLineSeparator(lineSeparator);
settings.getFormat().setPadding('-');
settings.setNullValue("?");

settings.setIgnoreLeadingWhitespaces(false);
settings.setIgnoreTrailingWhitespaces(false);
settings.setHeaders(expectedHeaders);


ByteArrayOutputStream fixedWidthResult = new ByteArrayOutputStream();

FixedWidthWriter writer = new FixedWidthWriter(new OutputStreamWriter(fixedWidthResult, "UTF-8"), settings);
writer.writeHeaders();
writer.writeRow(input[0]);
writer.writeRowWithCustomFields(input[1], customFields);
writer.writeRow(input[2]);
writer.close();

String result = fixedWidthResult.toString();
try {
assertEquals(result, expectedResult);
} catch (Error e) {
result = result.replaceAll("\r", "\\\\r");
System.out.println("FAILED:\n===\n" + result + "\n===");
throw e;
}
}

@Test(enabled = true, dataProvider = "lineSeparatorProvider")
public void testWriterWithSpacesAndOverflow(char[] lineSeparator) throws Exception {
String[] expectedHeaders = new String[]{
Expand Down