This Maven plugin brings the power of the Hibernate Tools API to your Maven build. If you are looking for a quick tutorial on the use of the Hibernate Tools Maven plugin, we can refer you to the 5 minute tutorial.
The plugin contains 3 goals. Issuing mvn help:describe -Dplugin=org.hibernate.tool:hibernate-tools-maven at the command line will give you an overview:
foo@bar ~ % mvn help:describe -Dplugin=org.hibernate.tool:hibernate-tools-maven
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- maven-help-plugin:3.2.0:describe (default-cli) @ standalone-pom ---
[INFO] org.hibernate.tool:hibernate-tools-maven:6.0.0-SNAPSHOT
Name: Hibernate Tools Maven Plugin
Description: Maven plugin to provide hibernate-tools reverse engineering and
code/schema generation abilities.
Group Id: org.hibernate.tool
Artifact Id: hibernate-tools-maven
Version: 6.0.0-SNAPSHOT
Goal Prefix: hibernate-tools
This plugin has 3 goals:
hibernate-tools:hbm2ddl
Description: Mojo to generate DDL Scripts from an existing database.
See
https://docs.jboss.org/tools/latest/en/hibernatetools/html_single/#d0e4651
hibernate-tools:hbm2java
Description: Mojo to generate Java JPA Entities from an existing database.
See:
https://docs.jboss.org/tools/latest/en/hibernatetools/html_single/#d0e4821
hibernate-tools:help
Description: Display help information on hibernate-tools-maven.
Call mvn hibernate-tools:help -Ddetail=true -Dgoal=<goal-name> to display
parameter details.
For more information, run 'mvn help:describe [...] -Ddetail'
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.489 s
[INFO] Finished at: 2020-03-10T10:19:38+01:00
[INFO] ------------------------------------------------------------------------
foo@bar ~ %
The hbm2ddl goal allows you to start from a Hibernate metamodel and create DDL and possibly execute it against a database.
You can issue mvn org.hibernate.tool:hibernate-tools-maven:help -Ddetail=true -Dgoal=hbm2ddl at the command line to get an overview of all the possible paremeters:
foo@bar ~ % mvn org.hibernate.tool:hibernate-tools-maven:help -Ddetail=true -Dgoal=hbm2ddl
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- hibernate-tools-maven:6.0.0-SNAPSHOT:help (default-cli) @ standalone-pom ---
[INFO] Hibernate Tools Maven Plugin 6.0.0-SNAPSHOT
Maven plugin to provide hibernate-tools reverse engineering and code/schema
generation abilities.
hibernate-tools:hbm2ddl
Mojo to generate DDL Scripts from an existing database.
See https://docs.jboss.org/tools/latest/en/hibernatetools/html_single/#d0e4651
Available parameters:
createCollectionForForeignKey (Default: true)
If true, a collection will be mapped for each foreignkey.
createManyToOneForForeignKey (Default: true)
If true, a many-to-one association will be created for each foreignkey
found.
delimiter (Default: ;)
Set the end of statement delimiter.
detectManyToMany (Default: true)
If true, tables which are pure many-to-many link tables will be mapped as
such. A pure many-to-many table is one which primary-key contains exactly
two foreign-keys pointing to other entity tables and has no other columns.
detectOneToOne (Default: true)
If true, a one-to-one association will be created for each foreignkey
found.
detectOptimisticLock (Default: true)
If true, columns named VERSION or TIMESTAMP with appropriate types will be
mapped with the appropriate optimistic locking corresponding to <version>
or <timestamp>.
format (Default: true)
Should we format the sql strings?
haltOnError (Default: true)
Should we stop once an error occurs?
outputDirectory (Default: ${project.build.directory}/generated-resources/)
The directory into which the DDLs will be generated.
outputFileName (Default: schema.ddl)
The default filename of the generated DDL script.
packageName
The default package name to use when mappings for classes are created.
propertyFile (Default:
${project.basedir}/src/main/hibernate/hibernate.properties)
The name of a property file, e.g. hibernate.properties.
revengFile
The name of a property file, e.g. hibernate.properties.
revengStrategy
The class name of the reverse engineering strategy to use. Extend the
DefaultReverseEngineeringStrategy and override the corresponding methods,
e.g. to adapt the generate class names or to provide custom type mappings.
schemaExportAction (Default: CREATE)
The DDLs statements to create.
- NONE: None - duh :P.
- CREATE (default): Create only.
- DROP: Drop only.
- BOTH: Drop and then create.
targetTypes (Default: SCRIPT)
The type of output to produce.
- DATABASE: Export to the database.
- SCRIPT (default): Write to a script file.
- STDOUT: Write to System.out.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.718 s
[INFO] Finished at: 2020-03-10T10:23:55+01:00
[INFO] ------------------------------------------------------------------------
foo@bar ~ %
The hbm2java goal allows you to start from an existing database and generate JPA entities that will map to this database. A lot of possible options allow you to control the generation output.
You can issue mvn org.hibernate.tool:hibernate-tools-maven:help -Ddetail=true -Dgoal=hbm2java at the command line to get an overview of all the possible paremeters:
foo@bar ~ % mvn org.hibernate.tool:hibernate-tools-maven:help -Ddetail=true -Dgoal=hbm2java
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- hibernate-tools-maven:6.0.0-SNAPSHOT:help (default-cli) @ standalone-pom ---
[INFO] Hibernate Tools Maven Plugin 6.0.0-SNAPSHOT
Maven plugin to provide hibernate-tools reverse engineering and code/schema
generation abilities.
hibernate-tools:hbm2java
Mojo to generate Java JPA Entities from an existing database.
See:
https://docs.jboss.org/tools/latest/en/hibernatetools/html_single/#d0e4821
Available parameters:
createCollectionForForeignKey (Default: true)
If true, a collection will be mapped for each foreignkey.
createManyToOneForForeignKey (Default: true)
If true, a many-to-one association will be created for each foreignkey
found.
detectManyToMany (Default: true)
If true, tables which are pure many-to-many link tables will be mapped as
such. A pure many-to-many table is one which primary-key contains exactly
two foreign-keys pointing to other entity tables and has no other columns.
detectOneToOne (Default: true)
If true, a one-to-one association will be created for each foreignkey
found.
detectOptimisticLock (Default: true)
If true, columns named VERSION or TIMESTAMP with appropriate types will be
mapped with the appropriate optimistic locking corresponding to <version>
or <timestamp>.
ejb3 (Default: false)
Code will contain EJB 3 features, e.g. using annotations from
javax.persistence and org.hibernate.annotations.
jdk5 (Default: false)
Code will contain JDK 5 constructs such as generics and static imports.
outputDirectory (Default: ${project.build.directory}/generated-sources/)
The directory into which the JPA entities will be generated.
packageName
The default package name to use when mappings for classes are created.
propertyFile (Default:
${project.basedir}/src/main/hibernate/hibernate.properties)
The name of a property file, e.g. hibernate.properties.
revengFile
The name of a property file, e.g. hibernate.properties.
revengStrategy
The class name of the reverse engineering strategy to use. Extend the
DefaultReverseEngineeringStrategy and override the corresponding methods,
e.g. to adapt the generate class names or to provide custom type mappings.
templatePath
A path used for looking up user-edited templates.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.814 s
[INFO] Finished at: 2020-03-10T10:37:54+01:00
[INFO] ------------------------------------------------------------------------
foo@bar ~ %
The help goal can be used to print out the previous information. You can issue mvn org.hibernate.tool:hibernate-tools-maven:help -Ddetail=true -Dgoal=help to get all the details of this goal.
foo@bar ~ % mvn org.hibernate.tool:hibernate-tools-maven:help -Ddetail=true -Dgoal=help
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- hibernate-tools-maven:6.0.0-SNAPSHOT:help (default-cli) @ standalone-pom ---
[INFO] Hibernate Tools Maven Plugin 6.0.0-SNAPSHOT
Maven plugin to provide hibernate-tools reverse engineering and code/schema
generation abilities.
hibernate-tools:help
Display help information on hibernate-tools-maven.
Call mvn hibernate-tools:help -Ddetail=true -Dgoal=<goal-name> to display
parameter details.
Available parameters:
detail (Default: false)
If true, display all settable properties for each goal.
User property: detail
goal
The name of the goal for which to show help. If unspecified, all goals
will be displayed.
User property: goal
indentSize (Default: 2)
The number of spaces per indentation level, should be positive.
User property: indentSize
lineLength (Default: 80)
The maximum length of a display line, should be positive.
User property: lineLength
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.675 s
[INFO] Finished at: 2020-03-10T10:16:19+01:00
[INFO] ------------------------------------------------------------------------
foo@bar ~ %