| A mutation for deleting an entity class or field.
WARNING: The data for the deleted class or field will be
destroyed and will be recoverable only by restoring from backup. If you
wish to convert the instance data to a different type or format, use a
Conversion mutation instead.
For example, to delete a field:
package my.package;
// The old class. Version 0 is implied.
//
class Person {
String name;
String favoriteColors;
}
// The new class. A new version number must be assigned.
//
class Person {
String name;
}
// Add the mutation for deleting a field.
//
Mutations mutations = new Mutations();
mutations.addDeleter(new Deleter(Person.class.getName(), 0,
"favoriteColors");
// Configure the mutations as described
Mutations here .
To delete an entity class:
package my.package;
// The old class. Version 0 is implied.
//
class Statistics {
...
}
// Add the mutation for deleting a class.
//
Mutations mutations = new Mutations();
mutations.addDeleter(new Deleter("my.package.Statistics", 0));
// Configure the mutations as described
Mutations here .
See Also: com.sleepycat.persist.evolve
See Also: Class Evolution
author:
Mark Hayes | 