org.classdump.luna.env

Interface RuntimeEnvironment

public interface RuntimeEnvironment

The runtime environment used by functions in the standard library.

To obtain instances of this interface, use the utility class RuntimeEnvironments.

Method Summary

Modifier and Type	Method and Description
FileSystem	fileSystem() Returns the file system.
double	getCpuTime() Returns an approximation of the CPU time used by this program in seconds.
String	getEnv(String name) Returns the value of the environment variable name, or null when name is not defined.
OutputStream	standardError() Returns the standard error stream.
InputStream	standardInput() Returns the standard input stream.
OutputStream	standardOutput() Returns the standard output stream.

Method Detail

standardInput

InputStream standardInput()

Returns the standard input stream.

Returns:

the standard input stream

standardOutput

OutputStream standardOutput()

Returns the standard output stream.

Returns:

the standard output stream

standardError

OutputStream standardError()

Returns the standard error stream.

Returns:

the standard output stream

fileSystem

FileSystem fileSystem()

Returns the file system.

Returns:

the file system

getEnv

String getEnv(String name)

Returns the value of the environment variable name, or null when name is not defined.

Parameters:

name - the name of the environment variable, must not be null

Returns:

the value of the environment variable name (possibly null)

Throws:

NullPointerException - if name is null

getCpuTime

double getCpuTime()

Returns an approximation of the CPU time used by this program in seconds.

Returns:

an approximation of the CPU time used by this program in seconds

Throws:

UnsupportedOperationException - if this operation is not supported by the runtime environment