Import
Class GTImport

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

public class GTImport

extends java.lang.Object

Functionality to import topologies that are saved in the GT-ITM (*.gtitm files) ALT format into our graph data structure. We use a undirected graph to represent GTITM topologies. (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 transit-stub topologies. To import transit-stub topologies, use the GTTSImport 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

GTImport(java.io.File inFile, int type)
Class Constructor: Creates a constructor to import either a router-level or an AS-level topology from a specified file.

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.
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

GTImport

public GTImport(java.io.File inFile,
                int type)

Class Constructor: Creates a constructor to import either a router-level or an AS-level topology from a specified file.

Parameters:

inFile - the file to import the topology from

type - Either ModelConstants.AS_FILE or ModelConstants.RT_FILE

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.