/**
* Initializes the JXPathContext based on any relevant properties set for the filter.
*
* @param context the JXPathContext to initialize
*/
protected void initialise(JXPathContext context) {
Map.Entry entry;
if (namespaces != null) {
if (logger.isDebugEnabled()) {
logger.debug("Initializing JXPathContext with namespaces: " + namespaces);
}
for (Iterator iterator = namespaces.entrySet().iterator(); iterator.hasNext(); ) {
entry = (Map.Entry) iterator.next();
context.registerNamespace(entry.getKey().toString(), entry.getValue().toString());
}
}
if (contextProperties != null) {
if (logger.isDebugEnabled()) {
logger.debug("Initializing JXPathContext with properties: " + contextProperties);
}
for (Iterator iterator = contextProperties.entrySet().iterator(); iterator.hasNext(); ) {
entry = (Map.Entry) iterator.next();
context.setValue(entry.getKey().toString(), entry.getValue());
}
}
if (factory != null) {
context.setFactory(factory);
}
context.setLenient(lenient);
}
/**
* @param c Company to cut salary
* @param condition condition for cutting salary. The condition works on the Employee attributes
* salary, name and address. Use <a href="http://www.w3schools.com/xpath/xpath_operators.asp"
* >w3schools-operators</a> and <a href="http://www.w3schools.com/xpath/xpath_examples.asp"
* >w3schools-examples</a> as reference. Example: "salary>2000 and name!='Koblenz'"
* @exception JXPathInvalidSyntaxException if condition is empty or is only whitespace
*/
@SuppressWarnings("unchecked")
public static void conditionedCut(Company c, String condition)
throws JXPathInvalidSyntaxException {
JXPathContext con = JXPathContext.newContext(c);
ArrayList<Employee> es = new ArrayList<Employee>();
es.addAll(con.selectNodes("//employees[" + condition + "]"));
es.addAll(con.selectNodes("//manager[" + condition + "]"));
// for (Employee e : es)
// e.setSalary(e.getSalary() / 2);
con = JXPathContext.newContext(es);
for (int i = 1; i <= es.size(); i++) {
con.setValue("@salary[" + i + "]", (Double) con.getValue("@salary[" + i + "]") / 2);
}
}