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 MailAliasManager

	implements UserBeforeDeleteListener

{

	private static MailAliasManager mailAliasManager = null;

	private static boolean registered = false;

	public static MailAliasManager getInstance()

	{

		if(mailAliasManager == null)

			mailAliasManager = new MailAliasManager();

		return mailAliasManager;

	}

	protected static void register()

	{

		synchronized(MailAliasManager.class) {

			if(registered) return;

			registered = true;

			try {

				HibernateUtil.getConfiguration().addResource(

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

			}

			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 MailAliasManager()

	{

		UserManager.getInstance().addBeforeDeleteListener(this);

	}

	public MailAlias create(User editor)

		throws ModelException

	{

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

		MailAlias alias = new MailAlias();

		alias.setDestinations(new ArrayList());

		return alias;

	}

	public boolean allowedToCreate(User editor)

		throws ModelException

	{

		return MailAlias.allowedToCreate(this, editor);

	}

	public MailAlias get(User editor, Long id)

		throws ModelException

	{

		MailAlias alias;

		try {

			alias = (MailAlias)HibernateUtil.currentSession().load(MailAlias.class, id);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

		if(!alias.viewableBy(editor))

			throw new ModelSecurityException();

		return alias;

	}

	public boolean addressExists(User editor, MailAlias alias, String address)

		throws ModelException

	{

		if(alias.getDomain() == null)

			throw new ModelException("Cannot check unique address for mail alias without domain");

		try {

			if(alias.getId() == null)

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

					"select count(*) from MailAlias where address = ? and domain = ?",

					new Object[] { address, alias.getDomain() },

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

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

			else

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

					"select count(*) from MailAlias a where address = ? and domain = ? and a != ?",

					new Object[] { address, alias.getDomain(), alias },

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

						Hibernate.entity(MailAlias.class) } )

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

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	protected MailAlias findForName(String name)

		throws ModelException

	{

		try {

			List list = HibernateUtil.currentSession().find(

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

			if(list.size() == 0)

				return null;

			else

				return (MailAlias)list.get(0);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	public void save(User editor, MailAlias mailAlias)

		throws ModelException

	{

		if(!mailAlias.editableBy(editor))

			throw new ModelSecurityException();

        boolean isNew = mailAlias.isNew();

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

		try {

			HibernateUtil.currentSession().saveOrUpdate(mailAlias);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

        // inform listeners

        if(isNew) {

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

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

    			listener.mailAliasCreated(editor, mailAlias);

        	}

        }

        else {

            MailAlias oldMailAlias = mailAlias.getOrigin();

            if(oldMailAlias == null) oldMailAlias = mailAlias;

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

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

    			listener.mailAliasModified(editor, mailAlias, oldMailAlias);

        	}

        }

	}

    public void addCreatedListener(MailAliasCreatedListener listener)

    {

    	createdListeners.add(listener);

    }

    public void removeCreatedListener(MailAliasCreatedListener listener)

    {

    	createdListeners.remove(listener);

    }

    public void addModifiedListener(MailAliasModifiedListener listener)

    {

    	modifiedListeners.add(listener);

    }

    public void removeModifiedListener(MailAliasModifiedListener listener)

    {

    	modifiedListeners.remove(listener);

    }

    public void addBeforeDeleteListener(MailAliasBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.add(listener);

    }

    public void removeBeforeDeleteListener(MailAliasBeforeDeleteListener listener)

    {

    	beforeDeleteListeners.remove(listener);

    }

    public void addDeletedListener(MailAliasDeletedListener listener)

    {

    	deletedListeners.add(listener);

    }

    public void removeDeletedListener(MailAliasDeletedListener listener)

    {

    	deletedListeners.remove(listener);

    }

    public Collection beforeDelete(User editor, MailAlias mailAlias, Collection known)

		throws ModelException

    {

    	Collection cascade = new ArrayList();

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

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

			Collection subcascade = listener.mailAliasBeforeDelete(editor, mailAlias, known);

    		if(subcascade != null)

    			cascade.addAll(subcascade);

    	}

    	return cascade;

    }

	public void delete(User editor, MailAlias mailAlias)

		throws ModelException

	{

	    // check rights

		if(!mailAlias.deleteableBy(editor))

			throw new ModelSecurityException();

        // backup copy

        MailAlias oldMailAlias = new MailAlias(mailAlias);

        // delete it

		try {

			HibernateUtil.currentSession().delete(mailAlias);

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

        // inform listeners

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

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

			listener.mailAliasDeleted(editor, oldMailAlias);

    	}

	}

	public Collection listMailAliases(User editor)

		throws ModelException

	{

		try {

			if(editor.isSuperuser())

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

			else

				return HibernateUtil.currentSession().find(

					"select a from MailAlias a left join a.domain as d"

					+ " where d.owner=? or a.owner=?",

					new Object[] { editor, editor },

					new Type[] { Hibernate.entity(User.class), Hibernate.entity(User.class) } );

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

	}

	public boolean areMailAliasesAvailable(User editor)

		throws ModelException

	{

		try {

			if(editor.isSuperuser()

				|| InetDomainManager.getInstance().areInetDomainsAvailable(editor))

			{

				return true;

			}

			else {

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

					"select count(*) from MailAlias a left join a.domain as d"

					+ " where d.owner=? or a.owner=?",

					new Object[] { editor, editor },

					new Type[] { Hibernate.entity(User.class), 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 mailAliases;

		try {

			mailAliases = HibernateUtil.currentSession().find(

				"from MailAlias where owner = ?",

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

		}

		catch(HibernateException ex)

		{

			throw new ModelException(ex);

		}

		return iterateBeforeDelete(editor, mailAliases, known);

    }

	private Collection iterateBeforeDelete(User editor, Collection mailAliases, Collection known)

		throws ModelException

	{

    	Collection cascade = new ArrayList();

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

			MailAlias mailAlias = (MailAlias)i.next();

            if(mailAlias.viewableBy(editor)) {

				if(mailAlias.deleteableBy(editor))

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

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

				else

					cascade.add(new CascadeDeleteElement(mailAlias, CascadeDeleteElement.FORBIDDEN,

						null));

			}

			else {

				cascade.add(new CascadeDeleteElement(MailAlias.createLimitedCopy(mailAlias),

					CascadeDeleteElement.FORBIDDEN, null));

			}

		}

    	return cascade;

	}

	public static final Comparator ADDRESS_COMPARATOR = new AddressComparator();

	private static class AddressComparator

		implements Comparator

	{

		public int compare(Object o1, Object o2)

		{

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

				throw new ClassCastException("not a MailAlias");

		    MailAlias a1 = (MailAlias)o1;

		    MailAlias a2 = (MailAlias)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.getAddress().compareToIgnoreCase(a2.getAddress());

		}

		public boolean equals(Object obj)

		{

			return (obj instanceof AddressComparator);

		}

	}

}