How to use

getBytesList

method

in

com.google.cloud.spanner.Struct

@Override
public List<ByteArray> getBytesList(String columnName) {
 return getCurrentRowAsStruct().getBytesList(columnName);
}

@Override
public List<ByteArray> getBytesList(int columnIndex) {
 return getCurrentRowAsStruct().getBytesList(columnIndex);
}

@Test
public void bindBytesArrayEmpty() {
 Struct row =
   execute(
     Statement.newBuilder("SELECT @v").bind("v").toBytesArray(Arrays.<ByteArray>asList()),
     Type.array(Type.bytes()));
 assertThat(row.isNull(0)).isFalse();
 assertThat(row.getBytesList(0)).isEmpty();
}

@Test
public void writeBytesArrayEmpty() {
 write(baseInsert().set("BytesArrayValue").toBytesArray(Arrays.<ByteArray>asList()).build());
 Struct row = readLastRow("BytesArrayValue");
 assertThat(row.isNull(0)).isFalse();
 assertThat(row.getBytesList(0)).containsExactly();
}

@Test
public void writeBytesArray() {
 List<ByteArray> data = Arrays.asList(ByteArray.copyFrom("a"), ByteArray.copyFrom("b"), null);
 write(baseInsert().set("BytesArrayValue").toBytesArray(data).build());
 Struct row = readLastRow("BytesArrayValue");
 assertThat(row.isNull(0)).isFalse();
 assertThat(row.getBytesList(0)).isEqualTo(data);
}

@Test
public void bindBytesArray() {
 ByteArray e1 = ByteArray.copyFrom("x");
 ByteArray e2 = ByteArray.copyFrom("y");
 ByteArray e3 = null;
 Struct row =
   execute(
     Statement.newBuilder("SELECT @v").bind("v").toBytesArray(asList(e1, e2, e3)),
     Type.array(Type.bytes()));
 assertThat(row.isNull(0)).isFalse();
 assertThat(row.getBytesList(0)).containsExactly(e1, e2, e3).inOrder();
}

private List<?> getRawList(Struct actualRow, int index, Type elementType) throws Exception {
 List<?> rawList = null;
 switch (elementType.getCode()) {
  case BOOL:
   rawList = actualRow.getBooleanList(index);
   break;
  case STRING:
   rawList = actualRow.getStringList(index);
   break;
  case BYTES:
   rawList = actualRow.getBytesList(index);
   break;
  case INT64:
   rawList = actualRow.getLongList(index);
   break;
  case FLOAT64:
   rawList = actualRow.getDoubleList(index);
   break;
  case STRUCT:
   rawList = actualRow.getStructList(index);
   break;
  default:
   Assert.fail("Unexpected type code:" + elementType.getCode());
 }
 return rawList;
}

 return Value.stringArray(value.getStringList(fieldIndex));
case BYTES:
 return Value.bytesArray(value.getBytesList(fieldIndex));
case FLOAT64:
 return Value.float64Array(value.getDoubleArray(fieldIndex));

@Override
public List<ByteArray> getBytesList(int columnIndex) {
 return getCurrentRowAsStruct().getBytesList(columnIndex);
}

@Override
public List<ByteArray> getBytesList(String columnName) {
 return getCurrentRowAsStruct().getBytesList(columnName);
}

return GSON.toJson(
  currentRow
    .getBytesList(columnName)
    .stream()
    .map(byteArray -> Base64.getEncoder().encodeToString(byteArray.toByteArray()))

if (!nullValue) {
 value =
   row.getBytesList(fieldName)
     .stream()
     .map(

 return Value.stringArray(value.getStringList(fieldIndex));
case BYTES:
 return Value.bytesArray(value.getBytesList(fieldIndex));
case FLOAT64:
 return Value.float64Array(value.getDoubleArray(fieldIndex));