How to use

get

method

in

de.schlichtherle.truezip.zip.ExtraFields

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

private byte[] getExtraFields(final boolean zip64) {
  ExtraFields fields = this.fields;
  if (zip64) {
    final ExtraField field = composeZip64ExtraField();
    if (null != field) {
      fields = null != fields ? fields.clone() : new ExtraFields();
      fields.add(field);
    }
  } else {
    assert null == fields || null == fields.get(ZIP64_HEADER_ID);
  }
  return null == fields ? EMPTY : fields.getExtra();
}

  @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);
  }
}

final ExtraField ef = fields.get(ZIP64_HEADER_ID);
if (null == ef) return;
final byte[] data = ef.getDataBlock();

@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));
}