Spring Roo provides an easy way of creating domain models in Java,
complete with JPA-based persistence support.
Example:
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This can be turned into working Java code by entering the following Roo commands:
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| jpa setup --database MYSQL --provider HIBERNATE
entity jpa --class ~.domain.Participant
field string --fieldName login
entity jpa --class ~.domain.Task
entity jpa --class ~.domain.Bid
focus --class ~.domain.Participant
field set --fieldName bids --type ~.domain.Bid --cardinality ONE_TO_MANY --mappedBy bidder
focus --class ~.domain.Bid
field reference --fieldName bidder --type ~.domain.Participant --cardinality MANY_TO_ONE
focus --class ~.domain.Task
field set --fieldName bids --type ~.domain.Bid --cardinality ONE_TO_MANY --mappedBy task
focus --class ~.domain.Bid
field reference --fieldName task --type ~.domain.Task --cardinality MANY_TO_ONE
focus --class ~.domain.Participant
field set --fieldName owned_tasks --type ~.domain.Task --cardinality ONE_TO_MANY --mappedBy owner
focus --class ~.domain.Task
field reference --fieldName owner --type ~.domain.Participant --cardinality MANY_TO_ONE
field string --fieldName description
field number --fieldName expenses --type double
field date --fieldName dueDate --type java.util.Date
focus --class ~.domain.Bid
field number --fieldName amount --type double
focus --class ~.domain.Task
field enum --fieldName taskState --type ~.domain.TaskState --enumType ORDINAL
focus --class ~.domain.Bid
field enum --fieldName bidState --type ~.domain.BidState --enumType ORDINAL
focus --class ~.domain.Task
entity jpa --class ~.domain.Location
entity jpa --class ~.domain.TaskStep
field reference --fieldName location --type ~.domain.Location --cardinality MANY_TO_ONE
focus --class ~.domain.Task
field list --fieldName steps --type ~.domain.TaskStep --cardinality ONE_TO_MANY
focus --class ~.domain.Location
field string --fieldName address
field number --fieldName latitude --type double
field number --fieldName longitude --type double
|
The result is here.