com.igormaznitsa.jcp.context

Class EnvironmentVariableProcessor

java.lang.Object

com.igormaznitsa.jcp.context.EnvironmentVariableProcessor

All Implemented Interfaces:

SpecialVariableProcessor

public class EnvironmentVariableProcessor
extends java.lang.Object
implements SpecialVariableProcessor

The class allows to get access to environment variables from preprocessor expression, the variables have the "env." prefix and all them are String type All environment variables are allowed for reading and disallowing for writing

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Map<java.lang.String,Value>	environmentVars
private static java.lang.String	PREFIX

Constructor Summary

Constructors

Constructor and Description
EnvironmentVariableProcessor()

Method Summary

Modifier and Type	Method and Description
Value	getVariable(java.lang.String varName, PreprocessorContext context) Get the value for the variable
java.lang.String[]	getVariableNames() Get all variable names allowed by the processor as an array, all names must be in lower case
void	setVariable(java.lang.String varName, Value value, PreprocessorContext context) Set a value to the variable

Methods inherited from class java.lang.Object

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

Field Detail

PREFIX

private static final java.lang.String PREFIX

See Also:

Constant Field Values

environmentVars

private final java.util.Map<java.lang.String,Value> environmentVars

Constructor Detail

EnvironmentVariableProcessor

public EnvironmentVariableProcessor()

Method Detail

getVariableNames

public java.lang.String[] getVariableNames()

Description copied from interface: SpecialVariableProcessor

Get all variable names allowed by the processor as an array, all names must be in lower case

Specified by:

getVariableNames in interface SpecialVariableProcessor

Returns:

allowed variable names as a String array

getVariable

public Value getVariable(java.lang.String varName,
                         PreprocessorContext context)

Description copied from interface: SpecialVariableProcessor

Get the value for the variable

Specified by:

getVariable in interface SpecialVariableProcessor

Parameters:

varName - the variable name, must not be null

context - the preprocessor context, it can be null

Returns:

the value, it must not return null because it will notified preprocessor that it supports the variable

setVariable

public void setVariable(java.lang.String varName,
                        Value value,
                        PreprocessorContext context)

Description copied from interface: SpecialVariableProcessor

Set a value to the variable

Specified by:

setVariable in interface SpecialVariableProcessor

Parameters:

varName - the variable name, must not be null

value - the value to be set to the variable, must not be null

context - the preprocessor context, it can be null