added jpa entity generator

src/java-jpa-entity.js

@@ -45,6 +45,8 @@ module.exports = {
                 field.id_type = jpa.id_generator && jpa.id_generator.type
                 field.columnType = field_attr.type || ''
 
+                field.oneToMany = field_attr.constraint == 'OneToMany'
+
 
                 return field
             })

templates/jpa-entity.java.mustache

@@ -54,7 +54,8 @@ public class {{name}} {
     ){{#isEnum}}
     @Enumerated(EnumType.STRING){{/isEnum}}{{#updateTimestamp}}
     @UpdateTimestamp{{/updateTimestamp}}{{#creationTimestamp}}
-    @CreationTimestamp{{/creationTimestamp}}
+    @CreationTimestamp{{/creationTimestamp}}{{#oneToMany}}
+    @OneToMany{{/oneTomany}}
     private {{{type.name}}} {{name}};
 
     {{/fields}}