Package org.cloudbus.cloudsim.util

Class ResourceLoader

java.lang.Object

org.cloudbus.cloudsim.util.ResourceLoader

public final class ResourceLoader
extends java.lang.Object

An utility class that loads a resource file/directory that is contained inside the directory of a given class.

Author:

Manoel Campos da Silva Filho

Method Summary

Modifier and Type	Method	Description
static java.util.List<java.lang.String>	getResourceList(java.lang.Class klass, java.lang.String resourceDir)	Gets the list of files contained inside a given resource directory.
static java.lang.String	getResourcePath(java.lang.Class klass, java.lang.String name)	Gets the absolute path of a resource (a file or sub-directory) inside the resources directory.
static java.net.URL	getResourceUrl(java.lang.Class klass, java.lang.String name)	Gets the URL of a resource (a file or sub-directory) inside the resources directory.
static java.io.BufferedReader	newBufferedReader(java.lang.String filePath, java.lang.Class klass)	Instantiates a BufferedReader to read a file (a file or sub-directory inside the resources directory) from its path.
static java.io.InputStream	newInputStream(java.lang.String filePath, java.lang.Class klass)	Instantiates a InputStream to read a file, trying to load the file from a jar file, in case the user is running simulations from a jar package.
static java.io.InputStreamReader	newInputStreamReader(java.lang.String filePath)	Instantiates a InputStreamReader to read a file outside the resource directory.
static java.io.InputStreamReader	newInputStreamReader(java.lang.String filePath, java.lang.Class klass)	Instantiates a InputStreamReader to read a file, trying to load the file from a jar file, in case the user is running simulations from a jar package.

Methods inherited from class java.lang.Object

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

Method Details

newBufferedReader

public static java.io.BufferedReader newBufferedReader(java.lang.String filePath, java.lang.Class klass)

Instantiates a BufferedReader to read a file (a file or sub-directory inside the resources directory) from its path.

Parameters:

filePath - the path of the resource to get a BufferedReader for it

klass - a class from the project that will be used just to assist in getting the path of the given resource

Returns:

a BufferedReader to read the resource

Throws:

java.io.FileNotFoundException - when the file doesn't exist

newInputStreamReader

public static java.io.InputStreamReader newInputStreamReader(java.lang.String filePath, java.lang.Class klass)

Instantiates a InputStreamReader to read a file, trying to load the file from a jar file, in case the user is running simulations from a jar package. If it cant get a reader directly, the simulation is not being executed from a jar package, so try to load the file from a directory in the filesystem.

Parameters:

filePath - the path of the file to get a reader for it

klass - a class from the project that will be used just to assist in getting the path of the given resource

Returns:

a InputStreamReader to read the resource

Throws:

java.io.UncheckedIOException - when the file cannot be accessed (such as when it doesn't exist)

newInputStream

public static java.io.InputStream newInputStream(java.lang.String filePath, java.lang.Class klass)

Instantiates a InputStream to read a file, trying to load the file from a jar file, in case the user is running simulations from a jar package. If it cant get a reader directly, the simulation is not being executed from a jar package, so try to load the file from a directory in the filesystem.

Parameters:

filePath - the path of the file to get a reader for it

klass - a class from the project that will be used just to assist in getting the path of the given resource

Returns:

a InputStreamReader to read the resource

Throws:

java.io.UncheckedIOException - when the file cannot be accessed (such as when it doesn't exist)

newInputStreamReader

public static java.io.InputStreamReader newInputStreamReader(java.lang.String filePath)

Instantiates a InputStreamReader to read a file outside the resource directory.

Parameters:

filePath - the path to the file

Returns:

a InputStreamReader to read the resource

Throws:

java.io.FileNotFoundException - when the file doesn't exist

getResourcePath

public static java.lang.String getResourcePath(java.lang.Class klass, java.lang.String name)

Gets the absolute path of a resource (a file or sub-directory) inside the resources directory.

Parameters:

klass - a class from the project which will be used just to assist in getting the path of the given resource. It can can any class inside the project where a resource you are trying to get from the resources directory

name - the name of the resource to get its path (that can be a file or a sub-directory inside the resources directory)

Returns:

the absolute path of the resource

getResourceUrl

public static java.net.URL getResourceUrl(java.lang.Class klass, java.lang.String name)

Gets the URL of a resource (a file or sub-directory) inside the resources directory.

Parameters:

klass - a class from the project which will be used just to assist in getting the path of the given resource. It can can any class inside the project where a resource you are trying to get from the resources directory

name - the name of the resource to get its path (that can be a file or a sub-directory inside the resources directory)

Returns:

the URL of the resource

getResourceList

public static java.util.List<java.lang.String> getResourceList(java.lang.Class klass, java.lang.String resourceDir)

Gets the list of files contained inside a given resource directory.

Parameters:

klass - a class from the project which will be used just to assist in getting the path of the given resource. It can can any class inside the project where a resource you are trying to get from the resources directory

resourceDir - the name of the resource directory to get the list of files from

Returns: