hop-user-manual/modules/ROOT/pages/plugins/transforms/valuemapper.adoc - incubator-hop-docs - Git at Google

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 :documentationPath: /plugins/transforms/
 :language: en_US
 :page-alternativeEditUrl: https://github.com/apache/incubator-hop/edit/master/plugins/transforms/valuemapper/src/main/doc/valuemapper.adoc
 = Value Mapper

 == Description

 The Value Mapper transform maps string values from one value to another. Mapping is usually solved by storing the conversion table in a database. The Value Mapper provides you with a simple alternative.

 For example, if you want to replace language codes:

 [source,bash]
 ----
 Fieldname to use: LanguageCode
 Target fieldname: LanguageDesc
 Source/Target: EN/English, FR/French, NL/Dutch, ES/Spanish, DE/German, ...
 ----

 == Options

 The following properties are used to define the mappings:

 [width="90%", options="header"]
 |===
 |Option|Description
 |Transform Name|Name of the transform this name has to be unique in a single pipeline.
 |Fieldname to use|Field to use as the mapping source
 |Target field name|Field to use as the mapping Target
 |Default upon non-matching|Defines a default value for situations where the source value is not empty, but there is no match
 |Field values table|Contains the mapping of source value to converted target value
 |===

 == Metadata Injection Support

 All fields of this transform support metadata injection. You can use this transform with ETL Metadata Injection to pass metadata to your pipeline at runtime.
	////
	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
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	////
	:documentationPath: /plugins/transforms/
	:language: en_US
	:page-alternativeEditUrl: https://github.com/apache/incubator-hop/edit/master/plugins/transforms/valuemapper/src/main/doc/valuemapper.adoc
	= Value Mapper

	== Description

	The Value Mapper transform maps string values from one value to another. Mapping is usually solved by storing the conversion table in a database. The Value Mapper provides you with a simple alternative.

	For example, if you want to replace language codes:

	[source,bash]
	----
	Fieldname to use: LanguageCode
	Target fieldname: LanguageDesc
	Source/Target: EN/English, FR/French, NL/Dutch, ES/Spanish, DE/German, ...
	----

	== Options

	The following properties are used to define the mappings:

	[width="90%", options="header"]
	\|===
	\|Option\|Description
	\|Transform Name\|Name of the transform this name has to be unique in a single pipeline.
	\|Fieldname to use\|Field to use as the mapping source
	\|Target field name\|Field to use as the mapping Target
	\|Default upon non-matching\|Defines a default value for situations where the source value is not empty, but there is no match
	\|Field values table\|Contains the mapping of source value to converted target value
	\|===

	== Metadata Injection Support

	All fields of this transform support metadata injection. You can use this transform with ETL Metadata Injection to pass metadata to your pipeline at runtime.