org.sca4j.host.expression
Interface ExpressionExpander

public interface ExpressionExpander

Expands strings containing expressions delimited by '${' and '}' by delegating to an ExpressionEvaluator. Expression values may be sourced using a variety of methods, including system and environment properties. Expression expansion is used to subsitute configuration values specified in a composite file with runtime values. For example:

 
Method Summary




 java.lang.String
expand(java.lang.String value)



          A string value containing an expression or expressions to expand.


 





Method Detail



expand
java.lang.String expand(java.lang.String value)
                        throws ExpressionExpansionException

A string value containing an expression or expressions to expand. The string may contain multiple expressions.


Parameters:
value - the value to expand
Returns:
the expanded string
Throws:
ExpressionExpansionException - if an error occurs evaluating an expression