public class Environment extends Object implements RevisionHandler
Constructor and Description |
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Environment() |
Modifier and Type | Method and Description |
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void |
addVariable(String key,
String value)
Add a variable to the internal map.
|
static boolean |
containsEnvVariables(String source)
Tests for the presence of environment variables.
|
String |
getRevision()
Returns the revision string.
|
static Environment |
getSystemWide()
Get the singleton system-wide (visible to every
class in the running VM) set of environment
variables.
|
Set<String> |
getVariableNames()
Get the names of the variables (keys) stored in the
internal map.
|
String |
getVariableValue(String key)
Get the value for a particular variable.
|
static void |
main(String[] args)
Main method for testing this class.
|
void |
removeVariable(String key)
Remove a named variable from the map.
|
String |
substitute(String source)
Substitute a variable names for their values in the given string.
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public static Environment getSystemWide()
public static boolean containsEnvVariables(String source)
source
- the string to testpublic String substitute(String source) throws Exception
source
- the source string to replace variables inException
- if an unknown variable name is encounteredpublic void addVariable(String key, String value)
key
- the name of the variablevalue
- its valuepublic void removeVariable(String key)
key
- the name of the varaible to remove.public Set<String> getVariableNames()
public String getVariableValue(String key)
key
- the name of the variable to getpublic static void main(String[] args)
args
- a list of strings to replace variables in
(e.g. "\${os.name} "\${java.version}")public String getRevision()
getRevision
in interface RevisionHandler
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