Examples of org.apache.torque.util.Criteria

org.apache.torque.util.Criteria
This is a utility class that is used for retrieving different types of values from a hashtable based on a simple name string. This class is meant to minimize the amount of casting that needs to be done when working with Hashtables. NOTE: other methods will be added as needed and as time permits. @author Frank Y. Kim @author John D. McNally @author Brett McLaughlin @author Eric Dobbs @author Henning P. Schmiedehausen @author Sam Joseph @author Martin Poeschl @author Thomas Fischer @author Scott Eade @version $Id: Criteria.java 332758 2005-11-12 11:15:21Z tfischer $

     * @return A criteria for the supplied role object
     */


    public static Criteria buildCriteria(Role role)
    {
        Criteria crit;


        try
        {
            Class[] clazz = new Class[] { roleObject };
            Object[] params =

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     *         the data backend.
     */
    public boolean accountExists(String userName)
        throws DataBackendException
    {
        Criteria criteria = new Criteria();
        criteria.add(UserPeerManager.getNameColumn(), userName);
        List users;
        try
        {
            users = UserPeerManager.doSelect(criteria);
        }

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     *            storage.
     */
    public User retrieve(String userName)
        throws UnknownEntityException, DataBackendException
    {
        Criteria criteria = new Criteria();
        criteria.add(UserPeerManager.getNameColumn(), userName);


        List users = retrieveList(criteria);;


        if (users.size() > 1)
        {

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     *         storage.
     */
    public User retrieveById(Object key)
            throws UnknownEntityException, DataBackendException
    {
        Criteria criteria = new Criteria();
        criteria.add(UserPeerManager.getIdColumn(), key);


        List users = retrieveList(criteria);


        if (users.size() > 1)
        {

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        if (!accountExists(user))
        {
            throw new UnknownEntityException("The account '" +
                                             user.getName() + "' does not exist");
        }
        Criteria criteria = new Criteria();
        criteria.add(UserPeerManager.getNameColumn(), user.getName());
        try
        {
            UserPeerManager.doDelete(criteria);
        }
        catch (Exception e)

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     * @exception Exception a generic exception.
     */
    public static PermissionSet retrieveSet(Role role)
            throws Exception
    {
        Criteria criteria = new Criteria();
        criteria.add(RolePermissionPeer.ROLE_ID,
                ((TurbineRole) role).getPrimaryKey());
        criteria.addJoin(RolePermissionPeer.PERMISSION_ID,
                PermissionPeer.PERMISSION_ID);
        return retrieveSet(criteria);
    }

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     * @param permission object to build the criteria
     * @return the Criteria
     */
    public static Criteria buildCriteria(Permission permission)
    {
        Criteria criteria = new Criteria();
        if (!((BaseObject) permission).isNew())
        {
            criteria.add(PERMISSION_ID,
                    ((BaseObject) permission).getPrimaryKey());
        }
        criteria.add(NAME, ((SecurityObject) permission).getName());


        /*
         * This is causing the the removal and updating of
         * a permission to crap out. This addition to the
         * criteria produces something like:

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     * @exception TorqueException a generic exception.
     */
    public static void doUpdate(Criteria criteria)
        throws TorqueException
    {
        Criteria selectCriteria = new Criteria(2);
        selectCriteria.put(PERMISSION_ID, criteria.remove(PERMISSION_ID));
        BasePeer.doUpdate(selectCriteria, criteria);
    }

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     * @throws Exception a generic exception.
     */
    public static boolean checkExists(Permission permission)
        throws DataBackendException, Exception
    {
        Criteria criteria = new Criteria();
        criteria.addSelectColumn(PERMISSION_ID);
        criteria.add(NAME, ((SecurityObject) permission).getName());
        List results = BasePeer.doSelect(criteria);
        if (results.size() > 1)
        {
            throw new DataBackendException("Multiple permissions named '"
                    + ((SecurityObject) permission).getName() + "' exist!");

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     * @return A Set of Roles of this User in the Group
     * @exception Exception a generic exception.
     */
    public static RoleSet retrieveSet(User user, Group group) throws Exception
    {
        Criteria criteria = new Criteria();
        criteria.add(UserGroupRolePeer.USER_ID,
                ((Persistent) user).getPrimaryKey());
        criteria.add(UserGroupRolePeer.GROUP_ID,
                ((Persistent) group).getPrimaryKey());
        criteria.addJoin(UserGroupRolePeer.ROLE_ID, RolePeer.ROLE_ID);
        return retrieveSet(criteria);
    }

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