forked from apache/flink
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[FLINK-9964][table] Add an initial CSV table format factory
This closes apache#6541.
- Loading branch information
Showing
14 changed files
with
1,465 additions
and
2 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,88 @@ | ||
<?xml version="1.0" encoding="UTF-8"?> | ||
<!-- | ||
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:https://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. | ||
--> | ||
<project xmlns="http:https://maven.apache.org/POM/4.0.0" xmlns:xsi="http:https://www.w3.org/2001/XMLSchema-instance" | ||
xsi:schemaLocation="http:https://maven.apache.org/POM/4.0.0 http:https://maven.apache.org/maven-v4_0_0.xsd"> | ||
|
||
<modelVersion>4.0.0</modelVersion> | ||
|
||
<parent> | ||
<groupId>org.apache.flink</groupId> | ||
<artifactId>flink-formats</artifactId> | ||
<version>1.7-SNAPSHOT</version> | ||
<relativePath>..</relativePath> | ||
</parent> | ||
|
||
<artifactId>flink-csv</artifactId> | ||
<name>flink-csv</name> | ||
|
||
<packaging>jar</packaging> | ||
|
||
<dependencies> | ||
|
||
<!-- core dependencies --> | ||
|
||
<dependency> | ||
<groupId>org.apache.flink</groupId> | ||
<artifactId>flink-core</artifactId> | ||
<version>${project.version}</version> | ||
<scope>provided</scope> | ||
</dependency> | ||
|
||
<dependency> | ||
<groupId>org.apache.flink</groupId> | ||
<!-- use a dedicated Scala version to not depend on it --> | ||
<artifactId>flink-table_2.11</artifactId> | ||
<version>${project.version}</version> | ||
<scope>provided</scope> | ||
<!-- Projects depending on this project, won't depend on flink-table. --> | ||
<optional>true</optional> | ||
</dependency> | ||
|
||
<!-- jackson --> | ||
<dependency> | ||
<groupId>com.fasterxml.jackson.dataformat</groupId> | ||
<artifactId>jackson-dataformat-csv</artifactId> | ||
<version>2.7.9</version> | ||
</dependency> | ||
|
||
<!-- test dependencies --> | ||
|
||
<dependency> | ||
<groupId>org.apache.flink</groupId> | ||
<artifactId>flink-test-utils-junit</artifactId> | ||
</dependency> | ||
|
||
<dependency> | ||
<groupId>org.apache.flink</groupId> | ||
<!-- use a dedicated Scala version to not depend on it --> | ||
<artifactId>flink-table_2.11</artifactId> | ||
<version>${project.version}</version> | ||
<type>test-jar</type> | ||
<scope>test</scope> | ||
</dependency> | ||
|
||
<!-- flink-table needs Scala --> | ||
<dependency> | ||
<groupId>org.scala-lang</groupId> | ||
<artifactId>scala-compiler</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
</dependencies> | ||
</project> |
225 changes: 225 additions & 0 deletions
225
...ats/flink-csv/src/main/java/org/apache/flink/formats/csv/CsvRowDeserializationSchema.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,225 @@ | ||
/* | ||
* 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:https://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.formats.csv; | ||
|
||
import org.apache.flink.annotation.Public; | ||
import org.apache.flink.api.common.serialization.DeserializationSchema; | ||
import org.apache.flink.api.common.typeinfo.BasicArrayTypeInfo; | ||
import org.apache.flink.api.common.typeinfo.PrimitiveArrayTypeInfo; | ||
import org.apache.flink.api.common.typeinfo.TypeInformation; | ||
import org.apache.flink.api.common.typeinfo.Types; | ||
import org.apache.flink.api.java.typeutils.RowTypeInfo; | ||
import org.apache.flink.types.Row; | ||
import org.apache.flink.util.Preconditions; | ||
|
||
import com.fasterxml.jackson.databind.JsonNode; | ||
import com.fasterxml.jackson.databind.ObjectReader; | ||
import com.fasterxml.jackson.databind.node.ArrayNode; | ||
import com.fasterxml.jackson.databind.node.NullNode; | ||
import com.fasterxml.jackson.databind.node.TextNode; | ||
import com.fasterxml.jackson.dataformat.csv.CsvMapper; | ||
import com.fasterxml.jackson.dataformat.csv.CsvSchema; | ||
|
||
import java.io.IOException; | ||
import java.io.UnsupportedEncodingException; | ||
import java.lang.reflect.Array; | ||
import java.math.BigDecimal; | ||
import java.math.BigInteger; | ||
import java.sql.Date; | ||
import java.sql.Time; | ||
import java.sql.Timestamp; | ||
|
||
/** | ||
* Deserialization schema from CSV to Flink types. | ||
* | ||
* <p>Deserializes a <code>byte[]</code> message as a {@link JsonNode} and | ||
* convert it to {@link Row}. | ||
* | ||
* <p>Failure during deserialization are forwarded as wrapped IOExceptions. | ||
*/ | ||
@Public | ||
public final class CsvRowDeserializationSchema implements DeserializationSchema<Row> { | ||
|
||
/** Schema describing the input csv data. */ | ||
private CsvSchema csvSchema; | ||
|
||
/** Type information describing the input csv data. */ | ||
private TypeInformation<Row> rowTypeInfo; | ||
|
||
/** ObjectReader used to read message, it will be changed when csvSchema is changed. */ | ||
private ObjectReader objectReader; | ||
|
||
/** Charset for byte[]. */ | ||
private String charset = "UTF-8"; | ||
|
||
/** | ||
* Create a csv row DeserializationSchema with given {@link TypeInformation}. | ||
*/ | ||
public CsvRowDeserializationSchema(TypeInformation<Row> rowTypeInfo) { | ||
Preconditions.checkNotNull(rowTypeInfo, "rowTypeInfo must not be null !"); | ||
CsvMapper csvMapper = new CsvMapper(); | ||
this.rowTypeInfo = rowTypeInfo; | ||
this.csvSchema = CsvRowSchemaConverter.rowTypeToCsvSchema((RowTypeInfo) rowTypeInfo); | ||
this.objectReader = csvMapper.readerFor(JsonNode.class).with(csvSchema); | ||
this.setNullValue("null"); | ||
} | ||
|
||
@Override | ||
public Row deserialize(byte[] message) throws IOException { | ||
JsonNode root = objectReader.readValue(message); | ||
return convertRow(root, (RowTypeInfo) rowTypeInfo); | ||
} | ||
|
||
@Override | ||
public boolean isEndOfStream(Row nextElement) { | ||
return false; | ||
} | ||
|
||
@Override | ||
public TypeInformation<Row> getProducedType() { | ||
return rowTypeInfo; | ||
} | ||
|
||
private Row convertRow(JsonNode root, RowTypeInfo rowTypeInfo) { | ||
String[] fields = rowTypeInfo.getFieldNames(); | ||
TypeInformation<?>[] types = rowTypeInfo.getFieldTypes(); | ||
Row row = new Row(fields.length); | ||
|
||
for (int i = 0; i < fields.length; i++) { | ||
String columnName = fields[i]; | ||
JsonNode node = root.get(columnName); | ||
row.setField(i, convert(node, types[i])); | ||
} | ||
return row; | ||
} | ||
|
||
private Row convertRow(ArrayNode node, RowTypeInfo rowTypeInfo) { | ||
TypeInformation[] types = rowTypeInfo.getFieldTypes(); | ||
String[] fields = rowTypeInfo.getFieldNames(); | ||
Row row = new Row(fields.length); | ||
for (int i = 0; i < fields.length; i++) { | ||
row.setField(i, convert(node.get(i), types[i])); | ||
} | ||
return row; | ||
} | ||
|
||
/** | ||
* Converts json node to object with given type information. | ||
* @param node json node to be converted. | ||
* @param info type information for the json data. | ||
* @return converted object | ||
*/ | ||
private Object convert(JsonNode node, TypeInformation<?> info) { | ||
if (node instanceof NullNode) { | ||
return null; | ||
} | ||
if (info == Types.STRING) { | ||
return node.asText(); | ||
} else if (info == Types.LONG) { | ||
return node.asLong(); | ||
} else if (info == Types.INT) { | ||
return node.asInt(); | ||
} else if (info == Types.DOUBLE) { | ||
return node.asDouble(); | ||
} else if (info == Types.FLOAT) { | ||
return Double.valueOf(node.asDouble()).floatValue(); | ||
} else if (info == Types.BIG_DEC) { | ||
return BigDecimal.valueOf(node.asDouble()); | ||
} else if (info == Types.BIG_INT) { | ||
return BigInteger.valueOf(node.asLong()); | ||
} else if (info == Types.SQL_DATE) { | ||
return Date.valueOf(node.asText()); | ||
} else if (info == Types.SQL_TIME) { | ||
return Time.valueOf(node.asText()); | ||
} else if (info == Types.SQL_TIMESTAMP) { | ||
return Timestamp.valueOf(node.asText()); | ||
} else if (info == Types.BOOLEAN) { | ||
return node.asBoolean(); | ||
} else if (info instanceof RowTypeInfo) { | ||
return convertRow((ArrayNode) node, (RowTypeInfo) info); | ||
} else if (info instanceof BasicArrayTypeInfo) { | ||
return convertArray((ArrayNode) node, ((BasicArrayTypeInfo) info).getComponentInfo()); | ||
} else if (info instanceof PrimitiveArrayTypeInfo && | ||
((PrimitiveArrayTypeInfo) info).getComponentType() == Types.BYTE) { | ||
return convertByteArray((TextNode) node); | ||
} else { | ||
throw new RuntimeException("Unable to support type " + info.toString() + " yet"); | ||
} | ||
} | ||
|
||
private Object[] convertArray(ArrayNode node, TypeInformation<?> elementType) { | ||
final Object[] array = (Object[]) Array.newInstance(elementType.getTypeClass(), node.size()); | ||
for (int i = 0; i < node.size(); i++) { | ||
array[i] = convert(node.get(i), elementType); | ||
} | ||
return array; | ||
} | ||
|
||
private byte[] convertByteArray(TextNode node) { | ||
try { | ||
return node.asText().getBytes(charset); | ||
} catch (UnsupportedEncodingException e) { | ||
throw new RuntimeException("Unsupport encoding charset" + charset, e); | ||
} | ||
} | ||
|
||
public void setCharset(String charset) { | ||
this.charset = charset; | ||
} | ||
|
||
public void setFieldDelimiter(String s) { | ||
if (s.length() != 1) { | ||
throw new RuntimeException("FieldDelimiter's length must be one !"); | ||
} | ||
this.csvSchema = this.csvSchema.rebuild().setColumnSeparator(s.charAt(0)).build(); | ||
} | ||
|
||
public void setArrayElementDelimiter(String s) { | ||
this.csvSchema = this.csvSchema.rebuild().setArrayElementSeparator(s).build(); | ||
this.objectReader = objectReader.with(csvSchema); | ||
} | ||
|
||
public void setQuoteCharacter(char c) { | ||
this.csvSchema = this.csvSchema.rebuild().setQuoteChar(c).build(); | ||
this.objectReader = objectReader.with(csvSchema); | ||
} | ||
|
||
public void setEscapeCharacter(char c) { | ||
this.csvSchema = this.csvSchema.rebuild().setEscapeChar(c).build(); | ||
this.objectReader = objectReader.with(csvSchema); | ||
} | ||
|
||
public void setNullValue(String s) { | ||
this.csvSchema = this.csvSchema.rebuild().setNullValue(s).build(); | ||
this.objectReader = objectReader.with(csvSchema); | ||
} | ||
|
||
@Override | ||
public boolean equals(Object o) { | ||
if (o == null || o.getClass() != this.getClass()) { | ||
return false; | ||
} | ||
if (this == o) { | ||
return true; | ||
} | ||
final CsvRowDeserializationSchema that = (CsvRowDeserializationSchema) o; | ||
return rowTypeInfo.equals(that.rowTypeInfo) && | ||
csvSchema.toString().equals(that.csvSchema.toString()); | ||
} | ||
} |
Oops, something went wrong.