/**
* Builds an expression manager.
*
* @param maps an array of maps of strings with the values of the properties.
* @since 0.1.0
*/
public ExpressionManager(Map<String, String>... maps) {
final RegexBasedInterpolator interpolator = new RegexBasedInterpolator();
for (Map<String, String> map : maps) {
interpolator.addValueSource(new MapBasedValueSource(map));
}
this.interpolator = interpolator;
}
private Map<Object, Object> buildContext(ServletContext servletContext) {
servletContext.log(
"Loading plexus context properties from: '" + DEFAULT_PLEXUS_PROPERTIES + "'");
Map<Object, Object> context = new HashMap<Object, Object>();
String plexusPropertiesPath = servletContext.getInitParameter(PLEXUS_PROPERTIES_PARAM);
if (plexusPropertiesPath == null) {
plexusPropertiesPath = DEFAULT_PLEXUS_PROPERTIES;
}
try {
URL url = servletContext.getResource(plexusPropertiesPath);
// if the user has not specified the plexus.props file then just return the context
if (url == null && plexusPropertiesPath == DEFAULT_PLEXUS_PROPERTIES) {
return context;
}
Properties properties = PropertyUtils.loadProperties(url);
if (properties == null) {
throw new Exception("Could not locate url: " + url.toString());
}
String baseDir = servletContext.getRealPath("/WEB-INF");
if (!StringUtils.isEmpty(baseDir)) {
servletContext.log("Setting Plexus context variable " + PLEXUS_HOME + " to: " + baseDir);
properties.put(PLEXUS_HOME, baseDir);
} else {
servletContext.log("CANNOT set Plexus basedir! (are we in unpacked WAR?)");
}
RegexBasedInterpolator ip = new RegexBasedInterpolator();
ip.addValueSource(new MapBasedValueSource(properties));
ip.addValueSource(new MapBasedValueSource(System.getProperties()));
for (Enumeration n = properties.propertyNames(); n.hasMoreElements(); ) {
String propertyKey = (String) n.nextElement();
String propertyValue = ip.interpolate(properties.getProperty(propertyKey), "");
servletContext.log("Added '" + propertyKey + "=" + propertyValue + "' to Plexus context.");
context.put(propertyKey, propertyValue);
}
} catch (Exception e) {
throw new RuntimeException(
"Could not load plexus context properties from: '" + plexusPropertiesPath + "'", e);
}
return context;
}
