de.hunsicker.jalopy.storage
Class Environment

java.lang.Object
  |
  +--de.hunsicker.jalopy.storage.Environment

public final class Environment

extends Object

Provides access to global and local environment variables (key/value pairs).

This class is thread-safe.

Since:

1.0b8

Version:

$Revision: 1.3 $

Author:

Marco Hunsicker

Inner Class Summary

static class

Environment.Variable Represents a local environment variable.

Method Summary

Environment	copy() Returns a copy of this object.
static Environment	getInstance() Returns an instance of this class.
String	interpolate(String str) Performs variable interpolation for the given input string.
void	set(String variable, String value) Sets the given variable to the given value.
String	toString() Returns a string representation of this object.
void	unset(String variable) Unsets (removes) the given variable

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static Environment getInstance()

Returns an instance of this class. This method is guarantueed to return a unique instance for each thread that invokes it.

Returns:

An instance of this class.

copy

public Environment copy()

Returns a copy of this object.

Returns:

a copy of this object.

interpolate

public String interpolate(String str)

Performs variable interpolation for the given input string. All environment variable expressions (\$[a-zA-Z_][a-zA-Z0-9_.]+\$, e.g. $fileName$ or $author$) in the given string are replaced with their corresponding environment value.

Parameters:

str - string to perform variable interpolation for.

Returns:

The input str with all variables interpolated.

See Also:

set(java.lang.String, java.lang.String)

set

public void set(String variable,
                String value)

Sets the given variable to the given value.

Parameters:

variable - variable name. Valid variable names have the form [a-zA-Z_][a-zA-Z0-9_.]+

value - value to associate.

See Also:

unset(java.lang.String)

toString

public String toString()

Returns a string representation of this object. The string representation consists of a list of key-value mappings in no particular order.

Overrides:

toString in class Object

Returns:

a string representation of this object.

unset

public void unset(String variable)

Unsets (removes) the given variable

Parameters:

variable - variable name.

See Also:

set(java.lang.String, java.lang.String)