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feat: Implement user defined delimiter for value format (#3393)
This PR implements configurable delimiters for value formats.
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99 changes: 99 additions & 0 deletions
99
ksql-common/src/main/java/io/confluent/ksql/serde/Delimiter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /* | ||
| * Copyright 2019 Confluent Inc. | ||
| * | ||
| * Licensed under the Confluent Community License (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.confluent.io/confluent-community-license | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations under the License. | ||
| */ | ||
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| package io.confluent.ksql.serde; | ||
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| import com.google.common.collect.ImmutableMap; | ||
| import com.google.errorprone.annotations.Immutable; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import org.apache.commons.lang3.StringUtils; | ||
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| @Immutable | ||
| public final class Delimiter { | ||
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| private static final Map<String, Character> NAMED_DELIMITERS = ImmutableMap | ||
| .<String, Character>builder() | ||
| .put("TAB", '\t') | ||
| .put("SPACE", ' ') | ||
| .build(); | ||
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| private static final String NAMED_DELIMITERS_STRING = | ||
| StringUtils.join(NAMED_DELIMITERS.keySet(), ","); | ||
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| private final char delimiter; | ||
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| public static Delimiter of(final char ch) { | ||
| return new Delimiter(ch); | ||
| } | ||
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| private Delimiter(final char delimiter) { | ||
| this.delimiter = delimiter; | ||
| } | ||
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| public static Delimiter of(final String str) { | ||
| if (str == null) { | ||
| throw new NullPointerException(); | ||
| } | ||
| if (str.trim().isEmpty()) { | ||
| throw new IllegalArgumentException( | ||
| "Delimiter cannot be empty, if you meant to have a tab or space for delimiter, please " | ||
| + "use the special values 'TAB' or 'SPACE'" | ||
| + System.lineSeparator() | ||
| + "Example valid value: ';'" | ||
| ); | ||
| } | ||
| if (str.length() == 1) { | ||
| return new Delimiter(str.charAt(0)); | ||
| } | ||
| final Character delim = NAMED_DELIMITERS.get(str); | ||
| if (delim != null) { | ||
| return new Delimiter(delim); | ||
| } | ||
| throw new IllegalArgumentException( | ||
| "Invalid delimiter value: '" + str | ||
| + "'. Delimiter must be a single character or " | ||
| + NAMED_DELIMITERS_STRING | ||
| + System.lineSeparator() | ||
| + "Example valid value: ';'" | ||
| ); | ||
| } | ||
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| @Override | ||
| public boolean equals(final Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| final Delimiter delimiter1 = (Delimiter) o; | ||
| return delimiter == delimiter1.delimiter; | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(delimiter); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return String.valueOf(delimiter); | ||
| } | ||
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| public char getDelimiter() { | ||
| return delimiter; | ||
| } | ||
| } |
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