Subversion Repositories general

package ak.hostadmiral.core.model;

import java.util.*;

import net.sf.hibernate.*;

import net.sf.hibernate.type.Type;

import ak.hostadmiral.util.HibernateUtil;

import ak.hostadmiral.util.ModelException;

import ak.hostadmiral.util.ModelSecurityException;

public class SystemUserManager

	implements UserBeforeDeleteListener

{

	private static SystemUserManager systemUserManager = null;

	private static boolean registered = false;

	public static SystemUserManager getInstance()

	{

		return systemUserManager;

	}

	protected static void register()

	{

		synchronized(SystemUserManager.class) {

			if(registered) return;

			registered = true;

			try {

				HibernateUtil.getConfiguration().addResource(

					"ak/hostadmiral/core/model/SystemUser.hbm.xml");

				systemUserManager = new SystemUserManager();

			}

			catch(Exception ex) {

				ex.printStackTrace();

				throw new RuntimeException(ex.getMessage());

			}

		}

	}

	static {

		register();

	}

	private Collection createdListeners      = new ArrayList();

	private Collection modifiedListeners     = new ArrayList();

	private Collection beforeDeleteListeners = new ArrayList();

	private Collection deletedListeners      = new ArrayList();

	private SystemUserManager()

	{

		UserManager.getInstance().addBeforeDeleteListener(this);

	}

	public SystemUser create(User editor)

		throws ModelException

	{

		if(!allowedToCreate(editor)) throw new ModelSecurityException();

		return new SystemUser();

	}

	public boolean allowedToCreate(User editor)

		throws ModelException

	{

		return SystemUser.allowedToCreate(this, editor);

	}

	public SystemUser get(User editor, Long id)

		throws ModelException

	{

		SystemUser user;

		try {

			user = (SystemUser)HibernateUtil.currentSession().load(SystemUser.class, id);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

		if(!user.viewableBy(editor))

			throw new ModelSecurityException();

		return user;

	}

	public boolean nameExists(User editor, SystemUser user, String name)

		throws ModelException

	{

		try {

			if(user.getId() == null)

				return ((Integer)HibernateUtil.currentSession().iterate(

					"select count(*) from SystemUser u where name = ?",

					name, Hibernate.STRING)

					.next()).intValue() > 0;

			else

				return ((Integer)HibernateUtil.currentSession().iterate(

					"select count(*) from SystemUser u where name = ? and u != ?",

					new Object[] { name, user },

					new Type[] { Hibernate.STRING, Hibernate.entity(SystemUser.class) } )

					.next()).intValue() > 0;

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	public boolean uidExists(User editor, SystemUser user, Integer uid)

		throws ModelException

	{

		try {

			if(user.getId() == null)

				return ((Integer)HibernateUtil.currentSession().iterate(

					"select count(*) from SystemUser u where uid = ?",

					uid, Hibernate.INTEGER)

					.next()).intValue() > 0;

			else

				return ((Integer)HibernateUtil.currentSession().iterate(

					"select count(*) from SystemUser u where uid = ? and u != ?",

					new Object[] { uid, user },

					new Type[] { Hibernate.INTEGER, Hibernate.entity(SystemUser.class) } )

					.next()).intValue() > 0;

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	protected SystemUser findForName(String name)

		throws ModelException

	{

		try {

			List list = HibernateUtil.currentSession().find(

				"from SystemUser where name=?", name, Hibernate.STRING);

			if(list.size() == 0)

				return null;

			else

				return (SystemUser)list.get(0);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	protected SystemUser findForUid(Integer uid)

		throws ModelException

	{

		try {

			List list = HibernateUtil.currentSession().find(

				"from SystemUser where uid=?", uid, Hibernate.INTEGER);

			if(list.size() == 0)

				return null;

			else

				return (SystemUser)list.get(0);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	public void save(User editor, SystemUser systemUser)

		throws ModelException

	{

		if(!systemUser.editableBy(editor))

			throw new ModelSecurityException();

        boolean isNew = systemUser.isNew();

		//systemUser.setModUser(editor);  // FIXME

		try {

			HibernateUtil.currentSession().saveOrUpdate(systemUser);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

        // inform listeners

        if(isNew) {

        	for(Iterator i = createdListeners.iterator(); i.hasNext(); ) {

        		SystemUserCreatedListener listener = (SystemUserCreatedListener)i.next();

    			listener.systemUserCreated(editor, systemUser);

        	}

        }

        else {

            SystemUser oldSystemUser = systemUser.getOrigin();

            if(oldSystemUser == null) oldSystemUser = systemUser;

        	for(Iterator i = modifiedListeners.iterator(); i.hasNext(); ) {

        		SystemUserModifiedListener listener = (SystemUserModifiedListener)i.next();

    			listener.systemUserModified(editor, systemUser, oldSystemUser);

        	}

        }

	}

    public void addCreatedListener(SystemUserCreatedListener listener)

    {

    	createdListeners.add(listener);

    }

    public void removeCreatedListener(SystemUserCreatedListener listener)

    {

    	createdListeners.remove(listener);

    }

    public void addModifiedListener(SystemUserModifiedListener listener)

    {

    	modifiedListeners.add(listener);

    }

    public void removeModifiedListener(SystemUserModifiedListener listener)

    {

    	modifiedListeners.remove(listener);

    }

    public void addBeforeDeleteListener(SystemUserBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.add(listener);

    }

    public void removeBeforeDeleteListener(SystemUserBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.remove(listener);

    }

    public void addDeletedListener(SystemUserDeletedListener listener)

    {

    	deletedListeners.add(listener);

    }

    public void removeDeletedListener(SystemUserDeletedListener listener)

    {

    	deletedListeners.remove(listener);

    }

    public Collection beforeDelete(User editor, SystemUser user, Collection known)

		throws ModelException

    {

    	Collection cascade = new ArrayList();

    	for(Iterator i = beforeDeleteListeners.iterator(); i.hasNext(); ) {

    		SystemUserBeforeDeleteListener listener = (SystemUserBeforeDeleteListener)i.next();

			Collection subcascade = listener.systemUserBeforeDelete(editor, user, known);

    		if(subcascade != null)

    			cascade.addAll(subcascade);

    	}

    	return cascade;

    }

	public void delete(User editor, SystemUser systemUser)

		throws ModelException

	{

	    // check rights

		if(!systemUser.deleteableBy(editor))

			throw new ModelSecurityException();

        // backup copy

        SystemUser oldSystemUser = new SystemUser(systemUser);

        // delete it

		try {

			HibernateUtil.currentSession().delete(systemUser);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

        // inform listeners

    	for(Iterator i = deletedListeners.iterator(); i.hasNext(); ) {

    		SystemUserDeletedListener listener = (SystemUserDeletedListener)i.next();

			listener.systemUserDeleted(editor, oldSystemUser);

    	}

	}

	public Collection listSystemUsers(User editor)

		throws ModelException

	{

		try {

			if(editor.isSuperuser()) {

				return HibernateUtil.currentSession().find("from SystemUser");

			}

			else {

				return HibernateUtil.currentSession().find(

					"select u from SystemUser u left join u.owner o where o is null or o=?",

					editor, Hibernate.entity(User.class));

			}

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	public boolean areSystemUsersAvailable(User editor)

		throws ModelException

	{

		try {

			if(editor.isSuperuser())

				return true;

			else

				return ((Integer)HibernateUtil.currentSession().iterate(

					"select count(*) from SystemUser u left join u.owner o where o is null or o=?",

					editor, Hibernate.entity(User.class)).next()).intValue() > 0;

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	public Collection userBeforeDelete(User editor, User user, Collection known)

		throws ModelException

	{

        Collection systemUsers;

		try {

			systemUsers = HibernateUtil.currentSession().find(

				"from SystemUser where owner = ?",

				user, Hibernate.entity(User.class) );

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

    	Collection cascade = new ArrayList();

		for(Iterator i = systemUsers.iterator(); i.hasNext(); ) {

			SystemUser u = (SystemUser)i.next();

            if(u.viewableBy(editor)) {

				if(u.deleteableBy(editor))

					cascade.add(new CascadeDeleteElement(u, CascadeDeleteElement.DELETE,

						this.beforeDelete(editor, u, known)));

				else

					cascade.add(new CascadeDeleteElement(u, CascadeDeleteElement.FORBIDDEN, null));

			}

			else {

				cascade.add(new CascadeDeleteElement(SystemUser.createLimitedCopy(u),

					CascadeDeleteElement.FORBIDDEN, null));

			}

		}

    	return cascade;

	}

	public static final Comparator UID_COMPARATOR  = new UidComparator();

	public static final Comparator NAME_COMPARATOR = new NameComparator();

	private static class UidComparator

		implements Comparator

	{

		public int compare(Object o1, Object o2)

		{

			if(!(o1 instanceof SystemUser) || !(o2 instanceof SystemUser))

				throw new ClassCastException("not a SystemUser");

		    SystemUser a1 = (SystemUser)o1;

		    SystemUser a2 = (SystemUser)o2;

		    if(a1 == null && a2 == null)

		    	return 0;

		    else if(a1 == null && a2 != null)

		    	return -1;

		    else if(a1 != null && a2 == null)

		    	return 1;

		    else

		    	return a1.getUid().compareTo(a2.getUid());

		}

		public boolean equals(Object obj)

		{

			return (obj instanceof UidComparator);

		}

	}

	private static class NameComparator

		implements Comparator

	{

		public int compare(Object o1, Object o2)

		{

			if(!(o1 instanceof SystemUser) || !(o2 instanceof SystemUser))

				throw new ClassCastException("not a SystemUser");

		    SystemUser a1 = (SystemUser)o1;

		    SystemUser a2 = (SystemUser)o2;

		    if(a1 == null && a2 == null)

		    	return 0;

		    else if(a1 == null && a2 != null)

		    	return -1;

		    else if(a1 != null && a2 == null)

		    	return 1;

		    else

		    	return a1.getName().compareToIgnoreCase(a2.getName());

		}

		public boolean equals(Object obj)

		{

			return (obj instanceof NameComparator);

		}

	}

}