org.maodian.flyingcat.xmpp.extensions.xep0030.QueryInfoCodec.java Source code

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Here is the source code for org.maodian.flyingcat.xmpp.extensions.xep0030.QueryInfoCodec.java

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/*
 * Copyright 2013 - 2013 Cole Wen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.maodian.flyingcat.xmpp.extensions.xep0030;

import java.util.List;

import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;

import org.maodian.flyingcat.xmpp.codec.AbstractCodec;
import org.maodian.flyingcat.xmpp.codec.InfoQueryProcessor;
import org.maodian.flyingcat.xmpp.entity.InfoQuery;
import org.maodian.flyingcat.xmpp.state.StreamError;
import org.maodian.flyingcat.xmpp.state.XmppContext;
import org.maodian.flyingcat.xmpp.state.XmppException;
import org.springframework.stereotype.Component;

/**
 * @author Cole Wen
 *
 */
@Component
public class QueryInfoCodec extends AbstractCodec implements InfoQueryProcessor {

    /* (non-Javadoc)
     * @see org.maodian.flycat.xmpp.codec.Decoder#decode(javax.xml.stream.XMLStreamReader)
     */
    @Override
    public Object decode(XMLStreamReader xmlsr) {
        try {
            xmlsr.require(XMLStreamConstants.START_ELEMENT, ServiceDiscovery.INFORMATION, "query");
            return new QueryInfo();
        } catch (XMLStreamException e) {
            throw new XmppException(e, StreamError.INVALID_XML);
        }
    }

    /* (non-Javadoc)
     * @see org.maodian.flycat.xmpp.codec.Encoder#encode(java.lang.Object, javax.xml.stream.XMLStreamWriter)
     */
    @Override
    public void encode(Object object, XMLStreamWriter xmlsw) throws XMLStreamException {
        xmlsw.writeStartElement("", "query", ServiceDiscovery.INFORMATION);
        xmlsw.writeDefaultNamespace(ServiceDiscovery.INFORMATION);

        QueryInfo qi = (QueryInfo) object;
        List<Identity> identityList = qi.getIdentityList();
        for (Identity identity : identityList) {
            xmlsw.writeEmptyElement("", "identity", ServiceDiscovery.INFORMATION);
            xmlsw.writeAttribute("category", identity.getCategory());
            xmlsw.writeAttribute("type", identity.getType());
        }

        List<Feature> featureList = qi.getFeatureList();
        for (Feature feature : featureList) {
            xmlsw.writeEmptyElement(ServiceDiscovery.INFORMATION, "feature");
            xmlsw.writeAttribute("var", feature.getVar());
        }
    }

    /* (non-Javadoc)
     * @see org.maodian.flycat.xmpp.payload.Processor#process(java.lang.Object)
     */
    @Override
    public Object processGet(XmppContext context, InfoQuery iq) {
        QueryInfo qi = new QueryInfo();
        qi.addIdentity(new Identity("auth", "generic")).addIdentity(new Identity("directory", "user"))
                .addIdentity(new Identity("server", "im")).addFeature(new Feature(ServiceDiscovery.INFORMATION))
                .addFeature(new Feature(ServiceDiscovery.ITEM));
        return qi;
    }

    /* (non-Javadoc)
     * @see org.maodian.flycat.xmpp.codec.InfoQueryProcessor#processSet(org.maodian.flycat.xmpp.state.XmppContext, org.maodian.flycat.xmpp.InfoQuery)
     */
    @Override
    public Object processSet(XmppContext context, InfoQuery iq) {
        throw new UnsupportedOperationException();
    }

}