{"id":326892,"date":"2023-09-07T03:02:02","date_gmt":"2023-09-07T03:02:02","guid":{"rendered":"https:\/\/www.baeldung.com\/java-mapstruct-bean-types-conditional"},"modified":"2023-09-07T03:02:02","modified_gmt":"2023-09-07T03:02:02","slug":"how-to-use-conditional-mapping-with-mapstruct","status":"publish","type":"post","link":"https:\/\/itteacheritfreelance.hk\/wordpress\/index.php\/2023\/09\/07\/how-to-use-conditional-mapping-with-mapstruct\/","title":{"rendered":"How to Use Conditional Mapping With MapStruct"},"content":{"rendered":"

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1. Introduction<\/h2>\n
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MapStruct<\/a> is a code generation tool that simplifies mapping between Java bean types.<\/strong> In this article, we’ll explore how to use conditional mapping with MapStruct and look at different configurations to achieve it.<\/p>\n

2. Conditional Mapping With MapStruct<\/h2>\n
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When mapping data between objects, we often find the need to map an attribute based on certain conditions, MapStruct offers a few configuration options to achieve this.<\/p>\n

Let’s examine an instance of a target License<\/em> object that requires mapping attributes based on a few conditions:<\/p>\n

public class License {\r\n    private UUID id;\r\n    private OffsetDateTime startDate;\r\n    private OffsetDateTime endDate;\r\n    private boolean active;\r\n    private boolean renewalRequired;\r\n    \/\/ getters and setters\r\n}<\/code><\/pre>\n
The input LicenseDto<\/em> contains an optional startDate<\/em> and endDate<\/em>:<\/p>\n
public class LicenseDto {\r\n    private UUID id;\r\n    private LocalDateTime startDate;\r\n    private LocalDateTime endDate;\r\n    \/\/ getters and setters\r\n}<\/code><\/pre>\n
The mapping rules from LicenseDto<\/em>\u00a0to License <\/em>are:<\/p>\n