public final class StringUtils extends Object
public static String substVars(String val, String currentKey, Map<String,String> cycleMap, Properties configProps) throws IllegalArgumentException
This method performs property variable substitution on the specified value. If the specified value contains the syntax ${<prop-name>}, where <prop-name> refers to either a configuration property or a system property, then the corresponding property value is substituted for the variable placeholder. Multiple variable placeholders may exist in the specified value as well as nested variable placeholders, which are substituted from inner most to outer most. Configuration properties override system properties.
val
- The string on which to perform property substitution.currentKey
- The key of the property being evaluated used to
detect cycles.cycleMap
- Map of variable references used to detect nested cycles.configProps
- Set of configuration properties.IllegalArgumentException
- If there was a syntax error in the
property placeholder syntax or a recursive variable
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