IntegerToInteger extends TypeConverterBase { @Override public byte[] from(Object value, int length, int decimals, boolean addPadding) { if(value == null && this.defaultValue == null) { return null; } int i = value != null ? (int) value : Integer.parseInt(this.defaultValue); if (i < 0) { throw new TypeConverterException("Number can not be negative"); } byte[] strBytes = Integer.toString(i).getBytes(this.charset); if (strBytes.length > length) { throw new TypeConverterException("Field to small for value: " + length + " < " + strBytes.length); } if (addPadding) { strBytes = padBytes(strBytes, length); } return strBytes; }  @Override void validate(Class<?> type, int size, int decimal); @Override Object to(byte[] bytes, int offset, int length, int decimals, boolean removePadding); @Override byte[] from(Object value, int length, int decimals, boolean addPadding);  }
@Test public void testFrom() throws Exception { byte[] bytes = typeConverter.from(12, 4, -1, true); assertArrayEquals("0012".getBytes(StandardCharsets.UTF_8), bytes); }
@Test public void testFromOverflow() throws Exception { expectedEx.expect(TypeConverterException.class); expectedEx.expectMessage("Field to small for value"); byte[] bytes = typeConverter.from(12147, 4, -1, true); }