ch.agent.crnickl.impl

Class SchemaUpdatePolicyImpl

java.lang.Object

ch.agent.crnickl.impl.SchemaUpdatePolicyImpl

All Implemented Interfaces:

SchemaUpdatePolicy, UpdatePolicy

public class SchemaUpdatePolicyImpl
extends Object
implements SchemaUpdatePolicy

Default implementation of SchemaUpdatePolicy.

Author:

Jean-Paul Vetterli

Constructor Summary

Constructors

Constructor and Description
SchemaUpdatePolicyImpl(DatabaseBackend database) Construct a SchemaUpdatePolicy.

Method Summary

Modifier and Type	Method and Description
<T> void	willDelete(Property<T> property) Throw an exception if the property cannot be rejected.
void	willDelete(UpdatableSchema schema) Throw an exception if the schema cannot be deleted.
<T> void	willDelete(ValueType<T> valueType) Throw an exception if the the value type cannot be deleted.
<T> void	willDelete(ValueType<T> valueType, T value) Throw an exception if the value type value cannot be deleted.
void	willUpdate(UpdatableSchema schema) Throw an exception if the update is rejected.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SchemaUpdatePolicyImpl

public SchemaUpdatePolicyImpl(DatabaseBackend database)

Construct a SchemaUpdatePolicy.

Parameters:

database - a database

Method Detail

willDelete

public void willDelete(UpdatableSchema schema)
                throws T2DBException

Throw an exception if the schema cannot be deleted.

A schema cannot be deleted if it serves as the base of another schema or if it is used by a chronicle.

Specified by:

willDelete in interface SchemaUpdatePolicy

Parameters:

schema - a schema

Throws:

T2DBException

willUpdate

public void willUpdate(UpdatableSchema schema)
                throws T2DBException

Throw an exception if the update is rejected.

It is not allowed to update the base schema of a schema and its attributes or series at the same time. It is allowed to modify the base of a schema if the new resulting schema has all the attributes and all the series of the old schema. It can have additional attributes, additional series, and additional series attributes.

Specified by:

willUpdate in interface SchemaUpdatePolicy

Parameters:

schema - a schema

Throws:

T2DBException

willDelete

public <T> void willDelete(Property<T> property)
                    throws T2DBException

Description copied from interface: SchemaUpdatePolicy

Throw an exception if the property cannot be rejected.

Specified by:

willDelete in interface SchemaUpdatePolicy

Parameters:

property - a property

Throws:

T2DBException

willDelete

public <T> void willDelete(ValueType<T> valueType)
                    throws T2DBException

Description copied from interface: SchemaUpdatePolicy

Throw an exception if the the value type cannot be deleted.

Specified by:

willDelete in interface SchemaUpdatePolicy

Parameters:

valueType - a value type

Throws:

T2DBException

willDelete

public <T> void willDelete(ValueType<T> valueType,
                           T value)
                    throws T2DBException

Description copied from interface: SchemaUpdatePolicy

Throw an exception if the value type value cannot be deleted.

Specified by:

willDelete in interface SchemaUpdatePolicy

Parameters:

valueType - a value type

value - a value

Throws:

T2DBException