edu.mit.blocks.codeblocks

Class BlockLink

java.lang.Object

edu.mit.blocks.codeblocks.BlockLink

public class BlockLink
extends java.lang.Object

A class that stores information about a potential block connection. Each BlockLink instance stores the Block IDs of the "plug" and "socket" and two block connectors, one from each, with a possible connection. In block linking, a "plug" can be either a before or plug connector, while a "socket" can either be a after or socket connector. Plugs can only connect to other socket connectors, while before connectors can connect to after and command socket connectors.

Method Summary

Modifier and Type	Method and Description
void	connect() This method actually connects the two blocks stored in this BlockLink object.
void	disconnect()
static BlockLink	getBlockLink(Workspace workspace, Block block1, Block block2, BlockConnector socket1, BlockConnector socket2) Factory method for creating BlockLink objects
java.lang.Long	getLastBlockID()
BlockConnector	getPlug()
java.lang.Long	getPlugBlockID()
BlockConnector	getSocket()
java.lang.Long	getSocketBlockID()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getPlug

public BlockConnector getPlug()

Returns:

the BlockConnector representing the plug side of the link

getSocket

public BlockConnector getSocket()

Returns:

the BlockConnector representing the socket side of the link

getPlugBlockID

public java.lang.Long getPlugBlockID()

Returns:

the Block ID of the Block containing the plug side of the link

getSocketBlockID

public java.lang.Long getSocketBlockID()

Returns:

the Block ID of the Block containing the socket side of the link

getLastBlockID

public java.lang.Long getLastBlockID()

connect

public void connect()

This method actually connects the two blocks stored in this BlockLink object.

disconnect

public void disconnect()

getBlockLink

public static BlockLink getBlockLink(Workspace workspace,
                                     Block block1,
                                     Block block2,
                                     BlockConnector socket1,
                                     BlockConnector socket2)

Factory method for creating BlockLink objects

Parameters:

workspace - The current workspace

block1 - one of the Block objects in the potential link

block2 - the other Block object

socket1 - the BlockConnector from block1

socket2 - the BlockConnector from block2

Returns:

a BlockLink object storing the potential link between block1 and block2

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object