be.SIRAPRISE.client

Class ServerUpdateCommand

java.lang.Object

be.SIRAPRISE.client.ServerCommand

be.SIRAPRISE.client.ServerAssignmentCommand

be.SIRAPRISE.client.ServerSingleAssignmentCommand

be.SIRAPRISE.client.ServerUpdateCommand

public final class ServerUpdateCommand
extends ServerSingleAssignmentCommand

A ServerUpdateCommand consists of three portions :

• The target relvar name
• The relational expression defining which tuples in the target relvar will be affected (=deleted) by the update
• The specification of the changes that have to be applied to all affected tuples, i.e. the specification of how to compute, for each affected tuple, what the replacing tuple will be.

Author:

Erwin

Constructor Summary

Constructors

Constructor and Description
ServerUpdateCommand(java.lang.String targetRelvarName, java.lang.String deleteRelationExpressionText, java.lang.String changes) Creates the ExecUpdateCommand

Method Summary

Modifier and Type	Method and Description
java.lang.String	getChanges() Gets The textual representation of the RA formula defining how to compute the replacing tuples.
ServerCommandDataWrapper[]	getCmdDataWrappers() Gets The commands represented in CommandDataWrappers
java.lang.String	getCommandParametersText() Gets the full textual representation of the command's parameters
java.lang.String	getDeleteRelationExpressionText() Gets The textual representation of the RA formula defining the relation to be deleted from the target
java.lang.String	getFullCommandText() Gets the full textual representation of the command

Methods inherited from class be.SIRAPRISE.client.ServerSingleAssignmentCommand

getTargetRelvarIdentifier, getTargetRelvarName

Methods inherited from class be.SIRAPRISE.client.ServerAssignmentCommand

reconstituteAssignmentCommand, reconstituteAssignmentCommand

Methods inherited from class be.SIRAPRISE.client.ServerCommand

getCommandObjectFor, getCommandObjectFrom, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ServerUpdateCommand

public ServerUpdateCommand(java.lang.String targetRelvarName,
                           java.lang.String deleteRelationExpressionText,
                           java.lang.String changes)

Creates the ExecUpdateCommand

Parameters:

targetRelvarName - The target relvar Name

deleteRelationExpressionText - The textual representation of the RA formula defining the relation to be deleted from the target

changes - The textual representation of the RA formula defining how to compute the replacing tuples. May not be enclosed in '(' and ')'.

Method Detail

getChanges

public final java.lang.String getChanges()

Gets The textual representation of the RA formula defining how to compute the replacing tuples. Is not be enclosed in '(' and ')'.

Returns:

The textual representation of the RA formula defining how to compute the replacing tuples. Is not be enclosed in '(' and ')'.

getCommandParametersText

public java.lang.String getCommandParametersText()

Description copied from class: ServerCommand

Gets the full textual representation of the command's parameters

Specified by:

getCommandParametersText in class ServerCommand

Returns:

the full textual representation of the command's parameters

getDeleteRelationExpressionText

public final java.lang.String getDeleteRelationExpressionText()

Gets The textual representation of the RA formula defining the relation to be deleted from the target

Returns:

The textual representation of the RA formula defining the relation to be deleted from the target

getFullCommandText

public java.lang.String getFullCommandText()

Description copied from class: ServerCommand

Gets the full textual representation of the command

Specified by:

getFullCommandText in class ServerCommand

Returns:

the full textual representation of the command

getCmdDataWrappers

public ServerCommandDataWrapper[] getCmdDataWrappers()

Description copied from class: ServerAssignmentCommand

Gets The commands represented in CommandDataWrappers

Specified by:

getCmdDataWrappers in class ServerAssignmentCommand

Returns:

The commands represented in CommandDataWrappers