Cut.java

package org.softlang.company.features;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.filter.ElementFilter;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

public class Cut {

    public static void cut(Document doc) {

        // Iterate over all salary elements
        Iterator<?> iterator = doc.getDescendants(new ElementFilter("salary"));

        // Snapshot these elements before modification
        List<Element> elems = new LinkedList<Element>();
        while (iterator.hasNext())
            elems.add((Element)iterator.next());

        // Iterate over salary elements and cut salaries
        for (Element elem : elems) {
            Double salary = Double.valueOf(elem.getText());
            elem.setText(Double.toString(salary/2));
        }
    }

}