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https://issues.apache.org/jira/browse/FLINK-3786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15262164#comment-15262164
]
ASF GitHub Bot commented on FLINK-3786:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1928#discussion_r61430239
--- Diff:
flink-core/src/main/java/org/apache/flink/api/common/typeutils/base/BigIntSerializer.java
---
@@ -0,0 +1,141 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.api.common.typeutils.base;
+
+import java.io.IOException;
+import java.math.BigInteger;
+import org.apache.flink.annotation.Internal;
+import org.apache.flink.core.memory.DataInputView;
+import org.apache.flink.core.memory.DataOutputView;
+
+@Internal
+public final class BigIntSerializer extends
TypeSerializerSingleton<BigInteger> {
+
+ private static final long serialVersionUID = 1L;
+
+ public static final BigIntSerializer INSTANCE = new BigIntSerializer();
+
+ @Override
+ public boolean isImmutableType() {
+ return true;
+ }
+
+ @Override
+ public BigInteger createInstance() {
+ return BigInteger.ZERO;
+ }
+
+ @Override
+ public BigInteger copy(BigInteger from) {
+ return from;
+ }
+
+ @Override
+ public BigInteger copy(BigInteger from, BigInteger reuse) {
+ return from;
+ }
+
+ @Override
+ public int getLength() {
+ return -1;
+ }
+
+ @Override
+ public void serialize(BigInteger record, DataOutputView target) throws
IOException {
+ writeBigInteger(record, target);
+ }
+
+ @Override
+ public BigInteger deserialize(DataInputView source) throws IOException {
+ return readBigInteger(source);
+ }
+
+ @Override
+ public BigInteger deserialize(BigInteger reuse, DataInputView source)
throws IOException {
+ return readBigInteger(source);
+ }
+
+ @Override
+ public void copy(DataInputView source, DataOutputView target) throws
IOException {
+ copyBigInteger(source, target);
+ }
+
+ @Override
+ public boolean canEqual(Object obj) {
+ return obj instanceof BigIntSerializer;
+ }
+
+ //
--------------------------------------------------------------------------------------------
+ // Static Helpers for BigInteger Serialization
+ //
--------------------------------------------------------------------------------------------
+
+ public static void writeBigInteger(BigInteger record, DataOutputView
target) throws IOException {
+ // null value support
+ if (record == null) {
+ target.writeInt(0);
+ return;
+ }
+ // fast paths for 0, 1, 10
+ else if (record == BigInteger.ZERO) {
+ target.writeInt(1);
+ return;
+ }
+ else if (record == BigInteger.ONE) {
+ target.writeInt(2);
+ return;
+ }
+ else if (record == BigInteger.TEN) {
+ target.writeInt(3);
+ return;
+ }
+ // default
+ final byte[] bytes = record.toByteArray();
+ // the length we write is offset by four, because null and
short-paths for ZERO, ONE, and TEN
+ target.writeInt(bytes.length + 4);
+ target.write(bytes);
+ }
+
+ public static BigInteger readBigInteger(DataInputView source) throws
IOException {
+ final int len = source.readInt();
+ if (len < 4) {
+ switch (len) {
+ case 0:
+ return null;
+ case 1:
+ return BigInteger.ZERO;
+ case 2:
+ return BigInteger.ONE;
+ case 3:
+ return BigInteger.TEN;
+ }
+ }
+ final byte[] bytes = new byte[len - 4];
+ source.read(bytes);
+ return new BigInteger(bytes);
+ }
+
+ public static boolean copyBigInteger(DataInputView source,
DataOutputView target) throws IOException {
+ final int len = source.readInt();
+ target.writeInt(len);
+ if (len >= 4) {
--- End diff --
`> 4`, otherwise `0` bytes are copied.
> Add BigDecimal and BigInteger as Basic types
> --------------------------------------------
>
> Key: FLINK-3786
> URL: https://issues.apache.org/jira/browse/FLINK-3786
> Project: Flink
> Issue Type: New Feature
> Components: Core
> Reporter: Timo Walther
> Assignee: Timo Walther
>
> We already had the discussion on the mailing list some months ago about
> adding BigDecimal and BigInteger as basic types.
> Especially for business or scientific applications it
> makes sense to support the BigInteger and BigDecimal types natively. In
> my opinion they are as important as Date or Void and should be added as
> BasicTypes. The Table API would also benefit from it.
> http://mail-archives.apache.org/mod_mbox/flink-dev/201511.mbox/%[email protected]%3E
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