Example usage for java.util Hashtable remove

Introduction

In this page you can find the example usage for java.util Hashtable remove.

Prototype

public synchronized V remove(Object key)

Source Link

Document

Removes the key (and its corresponding value) from this hashtable.

Usage

From source file:org.sakaiproject.site.tool.SiteAction.java

/**
 * Sets selected roles for multiple users
 * /*  w w  w .ja  va  2  s . c om*/
 * @param params
 *            The ParameterParser object
 * @param listName
 *            The state variable
 */
private void getSelectedRoles(SessionState state, ParameterParser params, String listName) {
    Hashtable pSelectedRoles = (Hashtable) state.getAttribute(STATE_SELECTED_PARTICIPANT_ROLES);
    if (pSelectedRoles == null) {
        pSelectedRoles = new Hashtable();
    }
    List userList = (List) state.getAttribute(listName);
    for (int i = 0; i < userList.size(); i++) {
        String userId = null;

        if (listName.equalsIgnoreCase(STATE_ADD_PARTICIPANTS)) {
            userId = ((Participant) userList.get(i)).getUniqname();
        } else if (listName.equalsIgnoreCase(STATE_SELECTED_USER_LIST)) {
            userId = (String) userList.get(i);
        }

        if (userId != null) {
            String rId = StringUtils.trimToNull(params.getString("role" + userId));
            if (rId == null) {
                addAlert(state, rb.getString("java.rolefor") + " " + userId + ". ");
                pSelectedRoles.remove(userId);
            } else {
                pSelectedRoles.put(userId, rId);
            }
        }
    }
    state.setAttribute(STATE_SELECTED_PARTICIPANT_ROLES, pSelectedRoles);

}