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java.lang.Objectcom.sleepycat.persist.evolve.Mutation
com.sleepycat.persist.evolve.Deleter
public class Deleter
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 or a ConversionStore
instead.
For example, to delete a field:
package my.package;
// The old class. Version 0 is implied.
//
@Entity
class Person {
String name;
String favoriteColors;
}
// The new class. A new version number must be assigned.
//
@Entity(version=1)
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 here
.
To delete an entity class:
package my.package;
// The old class. Version 0 is implied.
//
@Entity
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 here
.
Constructor Summary | |
---|---|
Deleter(java.lang.String className,
int classVersion)
Creates a mutation for deleting an entity class. |
|
Deleter(java.lang.String declaringClass,
int declaringClassVersion,
java.lang.String fieldName)
Creates a mutation for deleting the given field from all instances of the given class version. |
Method Summary |
---|
Methods inherited from class com.sleepycat.persist.evolve.Mutation |
---|
getClassName, getClassVersion, getFieldName |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public Deleter(java.lang.String className, int classVersion)
public Deleter(java.lang.String declaringClass, int declaringClassVersion, java.lang.String fieldName)
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