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CSV-180: Add withHeader(Class<? extends Enum>) to CSVFormat 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1742169 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Benedikt Ritter 2016-05-03 18:21:09 +00:00
parent 04b36452dd
commit 4def868a8e
3 changed files with 54 additions and 6 deletions
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1
src/changes/changes.xml
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@ -39,6 +39,7 @@
</properties>
<body>
<release version="1.3" date="2016-MM-DD" description="Feature and bug fix release">
<action issue="CSV-180" type="add" dev="britter">Add withHeader(Class&lt;? extends Enum&gt;) to CSVFormat</action>
<action issue="CSV-167" type="update" dev="sebb" due-to="Rene">Comment line hides next record; update Javadoc to make behaviour clear</action>
<action issue="CSV-153" type="update" dev="britter" due-to="Wren">CSVPrinter doesn't skip creation of header record if skipHeaderRecord is set to true</action>
<action issue="CSV-159" type="add" dev="ggregory" due-to="Yamil Medina">Add IgnoreCase option for accessing header names</action>

33
src/main/java/org/apache/commons/csv/CSVFormat.java
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@ -1173,6 +1173,39 @@ public final class CSVFormat implements Serializable {
skipHeaderRecord, allowMissingColumnNames, ignoreHeaderCase, trim, trailingDelimiter);
}
/**
* Returns a new {@code CSVFormat} with the header of the format defined by the enum class:
*
* <pre>
* public enum Header {
* Name, Email, Phone
* }
*
* CSVFormat format = aformat.withHeader(Header.class);
* </pre>
* <p>
* The header is also used by the {@link CSVPrinter}..
* </p>
*
* @param headerEnum
* the enum defining the header, {@code null} if disabled, empty if parsed automatically, user specified otherwise.
*
* @return A new CSVFormat that is equal to this but with the specified header
* @see #withHeader(String...)
* @see #withSkipHeaderRecord(boolean)
*/
public CSVFormat withHeader(final Class<? extends Enum<?>> headerEnum) {
String[] header = null;
if (headerEnum != null) {
Enum<?>[] enumValues = headerEnum.getEnumConstants();
header = new String[enumValues.length];
for (int i = 0; i < enumValues.length; i++) {
header[i] = enumValues[i].name();
}
}
return withHeader(header);
}
/**
* Returns a new {@code CSVFormat} with the header comments of the format set to the given values. The comments will
* be printed first, before the headers. This setting is ignored by the parser.

26
src/test/java/org/apache/commons/csv/CSVFormatTest.java
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@ -21,12 +21,7 @@ import static org.apache.commons.csv.CSVFormat.RFC4180;
import static org.apache.commons.csv.Constants.CR;
import static org.apache.commons.csv.Constants.CRLF;
import static org.apache.commons.csv.Constants.LF;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.*;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
@ -376,6 +371,18 @@ public class CSVFormatTest {
assertFalse(Arrays.equals(formatWithHeader.getHeader(), header));
}
@Test
public void testWithHeaderEnum() throws Exception {
final CSVFormat formatWithHeader = CSVFormat.DEFAULT.withHeader(Header.class);
assertArrayEquals(new String[]{ "Name", "Email", "Phone" }, formatWithHeader.getHeader());
}
@Test
public void testWithEmptyEnum() throws Exception {
final CSVFormat formatWithHeader = CSVFormat.DEFAULT.withHeader(EmptyEnum.class);
Assert.assertTrue(formatWithHeader.getHeader().length == 0);
}
@Test
public void testJiraCsv154_withCommentMarker() throws IOException {
final String comment = "This is a header comment";
@ -454,4 +461,11 @@ public class CSVFormatTest {
final CSVFormat formatWithRecordSeparator = CSVFormat.DEFAULT.withRecordSeparator(CRLF);
assertEquals(CRLF, formatWithRecordSeparator.getRecordSeparator());
}
public enum Header {
Name, Email, Phone
}
public enum EmptyEnum {
}
}