Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2304#discussion_r75459189
--- Diff:
flink-core/src/main/java/org/apache/flink/types/parser/BigDecParser.java ---
@@ -0,0 +1,126 @@
+/*
+ * 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.types.parser;
+
+import java.math.BigDecimal;
+import org.apache.flink.annotation.PublicEvolving;
+
+/**
+ * Parses a text field into a {@link java.math.BigDecimal}.
+ */
+@PublicEvolving
+public class BigDecParser extends FieldParser<BigDecimal> {
+
+ private static final BigDecimal BIG_DECIMAL_INSTANCE = BigDecimal.ZERO;
+
+ private BigDecimal result;
+
+ @Override
+ public int parseField(byte[] bytes, int startPos, int limit, byte[]
delimiter, BigDecimal reusable) {
+ int i = startPos;
+
+ final int delimLimit = limit - delimiter.length + 1;
+
+ while (i < limit) {
+ if (i < delimLimit && delimiterNext(bytes, i,
delimiter)) {
+ if (i == startPos) {
+
setErrorState(ParseErrorState.EMPTY_STRING);
+ return -1;
+ }
+ break;
+ }
+ i++;
+ }
+
+ if (i > startPos &&
+ (Character.isWhitespace(bytes[startPos]) ||
Character.isWhitespace(bytes[(i - 1)]))) {
+
setErrorState(ParseErrorState.NUMERIC_VALUE_ILLEGAL_CHARACTER);
+ return -1;
+ }
+
+ String str = new String(bytes, startPos, i - startPos);
+ try {
+ this.result = new BigDecimal(str);
+ return (i == limit) ? limit : i + delimiter.length;
+ } catch (NumberFormatException e) {
+
setErrorState(ParseErrorState.NUMERIC_VALUE_FORMAT_ERROR);
+ return -1;
+ }
+ }
+
+ @Override
+ public BigDecimal createValue() {
+ return BIG_DECIMAL_INSTANCE;
+ }
+
+ @Override
+ public BigDecimal getLastResult() {
+ return this.result;
+ }
+
+ /**
+ * Static utility to parse a field of type BigDecimal from a byte
sequence that represents text
+ * characters
+ * (such as when read from a file stream).
+ *
+ * @param bytes The bytes containing the text data that should be
parsed.
+ * @param startPos The offset to start the parsing.
+ * @param length The length of the byte sequence (counting from the
offset).
+ * @return The parsed value.
+ * @throws NumberFormatException Thrown when the value cannot be parsed
because the text
+ * represents not a correct number.
+ */
+ public static final BigDecimal parseField(byte[] bytes, int startPos,
int length) {
+ return parseField(bytes, startPos, length, (char) 0xffff);
+ }
+
+ /**
+ * Static utility to parse a field of type BigDecimal from a byte
sequence that represents text
+ * characters
+ * (such as when read from a file stream).
+ *
+ * @param bytes The bytes containing the text data that should be
parsed.
+ * @param startPos The offset to start the parsing.
+ * @param length The length of the byte sequence (counting from the
offset).
+ * @param delimiter The delimiter that terminates the field.
+ * @return The parsed value.
+ * @throws NumberFormatException Thrown when the value cannot be parsed
because the text
+ * represents not a correct number.
+ */
+ public static final BigDecimal parseField(byte[] bytes, int startPos,
int length, char delimiter) {
+ if (length <= 0) {
+ throw new NumberFormatException("Invalid input: Empty
string");
+ }
+ int i = 0;
+ final byte delByte = (byte) delimiter;
+
+ while (i < length && bytes[startPos + i] != delByte) {
+ i++;
+ }
+
+ if (i > 0 &&
+ (Character.isWhitespace(bytes[startPos]) ||
Character.isWhitespace(bytes[startPos + i - 1]))) {
+ throw new NumberFormatException("There is leading or
trailing whitespace in the numeric field.");
+ }
+
+ String str = new String(bytes, startPos, i);
--- End diff --
same as above.
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