001/**
002 *
003 * Copyright 2014-2015 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.xdata;
018
019import java.util.Map;
020import java.util.WeakHashMap;
021
022import org.jivesoftware.smack.ConnectionCreationListener;
023import org.jivesoftware.smack.Manager;
024import org.jivesoftware.smack.SmackException.NoResponseException;
025import org.jivesoftware.smack.SmackException.NotConnectedException;
026import org.jivesoftware.smack.XMPPConnection;
027import org.jivesoftware.smack.XMPPConnectionRegistry;
028import org.jivesoftware.smack.XMPPException.XMPPErrorException;
029import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
030import org.jivesoftware.smackx.xdata.packet.DataForm;
031
032public class XDataManager extends Manager {
033
034    /**
035     * The value of {@link DataForm#NAMESPACE}.
036     */
037    public static final String NAMESPACE = DataForm.NAMESPACE;
038
039    static {
040        XMPPConnectionRegistry.addConnectionCreationListener(new ConnectionCreationListener() {
041            @Override
042            public void connectionCreated(XMPPConnection connection) {
043                getInstanceFor(connection);
044            }
045        });
046    }
047
048    private static final Map<XMPPConnection, XDataManager> INSTANCES = new WeakHashMap<>();
049
050    /**
051     * Get the XDataManager for the given XMPP connection.
052     *
053     * @param connection
054     * @return the XDataManager
055     */
056    public static synchronized XDataManager getInstanceFor(XMPPConnection connection) {
057        XDataManager xDataManager = INSTANCES.get(connection);
058        if (xDataManager == null) {
059            xDataManager = new XDataManager(connection);
060            INSTANCES.put(connection, xDataManager);
061        }
062        return xDataManager;
063    }
064
065    private XDataManager(XMPPConnection connection) {
066        super(connection);
067        ServiceDiscoveryManager serviceDiscoveryManager = ServiceDiscoveryManager.getInstanceFor(connection);
068        serviceDiscoveryManager.addFeature(NAMESPACE);
069    }
070
071    /**
072     * Check if the given entity supports data forms.
073     *
074     * @param jid the JID of the entity to check.
075     * @return true if the entity supports data forms.
076     * @throws NoResponseException
077     * @throws XMPPErrorException
078     * @throws NotConnectedException
079     * @see <a href="http://xmpp.org/extensions/xep-0004.html#disco">XEP-0004: Data Forms ยง 6. Service Discovery</a>
080     * @since 4.1
081     */
082    public boolean isSupported(String jid) throws NoResponseException, XMPPErrorException, NotConnectedException {
083        return ServiceDiscoveryManager.getInstanceFor(connection()).supportsFeature(jid, NAMESPACE);
084    }
085}