How to use

remove

method

in

de.schlichtherle.truezip.zip.ExtraFields

final @Nullable ExtraField removeExtraField(final int headerId) {
  final ExtraFields fields = this.fields;
  return null != fields ? fields.remove(headerId) : null;
}

/**
 * @throws IllegalArgumentException if the serialized extra fields do not
 *         conform to the ZIP File Format Specification.
 */
private void setExtraFields(final byte[] buf, final boolean zip64)
throws IllegalArgumentException {
  assert UShort.check(buf.length);
  if (0 < buf.length) {
    final ExtraFields fields = new ExtraFields();
    try {
      fields.readFrom(buf, 0, buf.length);
      if (zip64) parseZip64ExtraField(fields);
    } catch (final IndexOutOfBoundsException ex) {
      throw new IllegalArgumentException(ex);
    }
    fields.remove(ZIP64_HEADER_ID);
    this.fields = 0 < fields.size() ? fields : null;
  } else {
    this.fields = null;
  }
}

@Test
public void testCollection0() {
  fields.readFrom(serialized, 0, serialized.length);
  final ExtraField ef = fields.get(ExtraField.ZIP64_HEADER_ID);
  assertNotNull(ef);
  assertSame(ef, fields.remove(ExtraField.ZIP64_HEADER_ID));
  assertNull(fields.get(ExtraField.ZIP64_HEADER_ID));
  assertNull(fields.add(ef));
  final byte[] got = fields.getExtra();
  assertNotSame(serialized, got);
  assertTrue(Arrays.equals(serialized, got));
}

  @Test
  public void testCollection1() {
    assertEquals(0, fields.getExtra().length);
    final ExtraField ef = new DefaultExtraField(ExtraField.ZIP64_HEADER_ID);
    assertNull(fields.get(ExtraField.ZIP64_HEADER_ID));
    assertNull(fields.add(ef));
    byte[] got = fields.getExtra();
    assertEquals(4 + ef.getDataSize(), got.length);
    assertSame(ef, fields.remove(ExtraField.ZIP64_HEADER_ID));
    assertEquals(0, fields.getExtra().length);
  }
}