Environment

public class Environment extends EnvironmentBase

This class provides access to the environment variables and provides facilities to specify where to load the underlying AMPL interpreter.

Fields

PATH

public static final String PATH

Get the platform dependent name of the path environment variable. To append a directory to current list of system paths, follow the snippet below:

Environment e = new Environment();
String paths = e.get(Environment.PATH);
e.put(Environment.PATH, paths + java.io.File.pathSeparatorChar + "/mynewpath");

Note that changing the paths in this way has effect only until the underlying AMPL process is started (in the AMPL constructor).

Constructors

Environment

public Environment()

Default constructor, just copies the values of the current system environment variables. Expects the AMPL binary in a directory included in the system paths list or in the default position (which is APIJARLOCATION/ampl)

Environment

public Environment(String binDir)

Permits the user to specify a custom location for the AMPL executable.

Parameters:

• binDir – Directory to search the AMPL executable in

Methods

containsKey

public boolean containsKey(Object key)

get

public String get(Object key)

getBinDir

public String getBinDir()

Returns the directory containing the overriding AMPL executable directory.

getWorkingDir

String getWorkingDir()

Returns the path to the current working directory.

isEmpty

public boolean isEmpty()

put

public void put(String key, String value)

setBinDir

public void setBinDir(String exePath)

Sets the directory in which the AMPL executable is located. Does not perform any check regarding whether the AMPL executable in there is working or not.

Parameters:

• exePath – Path to the AMPL executable (without file name)

size

public int size()

toString

public String toString()