Package org.goplanit.gtfs.util

Class GtfsUtils

java.lang.Object

org.goplanit.gtfs.util.GtfsUtils

public class GtfsUtils
extends Object

general utilities specific to this GTFS API

Author:

markr

Constructor Summary

Constructors

Constructor	Description
GtfsUtils()

Method Summary

Modifier and Type	Method	Description
static FileInputStream	createFileInputStream(File gtfsFileLocation, GtfsFileConditions filePresenceCondition)	Create a file based input stream for given file and issue warnings dependent on the presence conditions imposed if it is not present
static InputStream	createInputStream(URL gtfsLocation, GtfsFileScheme fileScheme, GtfsFileConditions filePresenceCondition)	Based on passed in location and the file scheme create an input stream to the appropriate file, log warnings if not present but conditions require otherwise.
static InputStream	createZipEntryInputStream(URL gtfsLocation, String zipInternalFileName, GtfsFileConditions filePresenceCondition)	Create a zip based input stream for given zip internal file location and issue warnings dependent on the presence conditions imposed if it is not present
static EnumSet<GtfsKeyType>	getSupportedKeys(GtfsObjectType objectType)	Collect the supported keys via reflection where it is assumed the object type's class has a default constructor.
static boolean	isValidGtfsLocation(URL gtfsLocation)	A GTFS location URL is valid when it is either a directory or a zip file from which we can source the various GTFS files

Methods inherited from class java.lang.Object

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

Constructor Detail

GtfsUtils

public GtfsUtils()

Method Detail

isValidGtfsLocation

public static boolean isValidGtfsLocation(URL gtfsLocation)

A GTFS location URL is valid when it is either a directory or a zip file from which we can source the various GTFS files

Parameters:

gtfsLocation - to verify

Returns:

true when valid, false otherwise

createInputStream

public static InputStream createInputStream(URL gtfsLocation,
                                            GtfsFileScheme fileScheme,
                                            GtfsFileConditions filePresenceCondition)

Based on passed in location and the file scheme create an input stream to the appropriate file, log warnings if not present but conditions require otherwise.

Parameters:

gtfsLocation - to use (dir or zip)

fileScheme - to use to extract correct file name from

filePresenceCondition - indicates if the file should be present or not. If

Returns:

input stream to GTFS file

createZipEntryInputStream

public static InputStream createZipEntryInputStream(URL gtfsLocation,
                                                    String zipInternalFileName,
                                                    GtfsFileConditions filePresenceCondition)
                                             throws URISyntaxException

Create a zip based input stream for given zip internal file location and issue warnings dependent on the presence conditions imposed if it is not present

Parameters:

gtfsLocation - zip file to create input stream for

zipInternalFileName - file internal to zip file to create stream for

filePresenceCondition - for this file

Returns:

created input stream, null if not available

Throws:

URISyntaxException - when URL cannot be converted to URI to append internal file name

createFileInputStream

public static FileInputStream createFileInputStream(File gtfsFileLocation,
                                                    GtfsFileConditions filePresenceCondition)

Create a file based input stream for given file and issue warnings dependent on the presence conditions imposed if it is not present

Parameters:

gtfsFileLocation - to create input stream for

filePresenceCondition - for this file

Returns:

created input stream, null if not available

getSupportedKeys

public static EnumSet<GtfsKeyType> getSupportedKeys(GtfsObjectType objectType)

Collect the supported keys via reflection where it is assumed the object type's class has a default constructor. If so the supported keys are collected via a temporary instance that is created to access the abstract method providing the type specific supported keys

Parameters:

objectType - to use

Returns:

supported keys