Import
Class GTTSImport

java.lang.Object
  |
  +--Import.GTTSImport

public class GTTSImport

extends java.lang.Object

Functionality to import topologies that are saved as GT-ITM's Transit-Stub alt format (*.gtts files) into our data structures. Because GT-ITM's transit-stub format defines a neat grouping of router-nodes, we treat each grouping as a distinct AS (either a transit-AS or a stub-AS) and thus can assign each router node an ASid (that is the ID of the AS node it belong to). Also, like GTImport, we treated GTITM topologies as an undirected graph. (GTITM topologies are undirected in the sense that they have double directed edges between each pair or neighboring nodes). This class does not know how to import GT-ITM topologies that are flat (that is, geo generated topologies.) To import these topologies, use the GTImport class instead.

Generally, all Import routines would be called by the Model.FileModel class. However, if you only need to import the Graph and not the Model parameters, you can simply call the parse method to obtain the Graph. The model paramters can be access by the getFormatParams method.

All NodeIDs are reinitialized to native BRITE id. A mapping between the actual IDs and the new assigned BRITE Ids are stored in a hashmap id2id with key as the actual IDs and values as the BRITE ids. You can access this mapping by the getIDMap() method.

Constructor Summary

GTTSImport(java.io.File inFile)
Class Constructor: Creates a constructor to import router-level topologies only.

Method Summary

java.lang.String	getFormatParams() Model specific parameters if the import file format specifies it.
java.util.HashMap	getIDMap() When importing the graph structure in the specified topology, the actual NodeIDs are reinitialized and converted to BRITE IDs.
static void	main(java.lang.String[] args)
Graph	parse() File parsing is done here.

Methods inherited from class java.lang.Object

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

Constructor Detail

GTTSImport

public GTTSImport(java.io.File inFile)

Class Constructor: Creates a constructor to import router-level topologies only. (AS level topologies do not make sense for the transit-stub format)

Parameters:

inFile - the file to import the topology from

Method Detail

getIDMap

public java.util.HashMap getIDMap()

When importing the graph structure in the specified topology, the actual NodeIDs are reinitialized and converted to BRITE IDs. A mapping with the actual file IDs as keys and the BRITE IDs as values is maintained, which this method returns.

Returns:

HashMap the mapping

getFormatParams

public java.lang.String getFormatParams()

Model specific parameters if the import file format specifies it. If none exist, "" is returned.

Returns:

String the format specific parameters.

parse

public Graph parse()

File parsing is done here.

Returns:

Graph A BRITE graph containing the topology read in the format.

main

public static void main(java.lang.String[] args)