org.ambientdynamix.contextplugins.foaf.FoafPluginRuntime.java Source code

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Here is the source code for org.ambientdynamix.contextplugins.foaf.FoafPluginRuntime.java

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/*
 * Copyright (C) Institute of Telematics, Lukas Ruge
 *
 * 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.ambientdynamix.contextplugins.foaf;

import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.UUID;

import org.ambientdynamix.api.contextplugin.*;
import org.ambientdynamix.api.contextplugin.security.PrivacyRiskLevel;
import org.ambientdynamix.api.contextplugin.security.SecuredContextInfo;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.input.SAXBuilder;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

/**
 * The PingPluginRuntime only reacts to configured context requests. It has to receive a string in a Bundle with the key "id". 
 * It will create a PingContextInfo Object and send it via Dynamix
 *
 * This is an example plug-in that is very simple and can be used as a starting point for plug-in-development. 
 * 
 * It is also used for roundtrip-time testing of dynamix
 * 
 * @author lukas
 *
 */
public class FoafPluginRuntime extends AutoReactiveContextPluginRuntime {
    private final String TAG = Constants.TAG;
    private static FoafPluginRuntime context;
    private static String foaffile = "";
    public static ContextPluginSettings settings;
    Timer timer;

    static String foafname = "";

    @Override
    public void start() {
        /*
         * Nothing to do, since this is a pull plug-in... we're now waiting for context scan requests.
         */
        context = this;
        Log.i(TAG, "Started!");
    }

    @Override
    public void stop() {
        /*
         * At this point, the plug-in should cancel any ongoing context scans, if there are any.
         */
        Log.i(TAG, "Stopped!");
    }

    @Override
    public void destroy() {
        /*
         * At this point, the plug-in should release any resources.
         */
        timer.stop();
        stop();
        Log.i(TAG, "Destroyed!");
    }

    @Override
    public void updateSettings(ContextPluginSettings settings) {
        // Not supported
    }

    @Override
    public void handleContextRequest(UUID requestId, String contextInfoType) {
        SecuredContextInfo aci = new SecuredContextInfo(new ProfileContextInfo(), PrivacyRiskLevel.LOW);
        sendContextEvent(requestId, aci);
        context = this;
    }

    @Override
    public void handleConfiguredContextRequest(UUID requestId, String contextInfoType, Bundle scanConfig) {
        handleContextRequest(requestId, contextInfoType);
        context = this;
    }

    @Override
    public void init(PowerScheme arg0, ContextPluginSettings arg1) throws Exception {
        Log.d(TAG, "init");
        if (arg1 != null) {
            Log.d(TAG, "settings are not null and now get stored as a static variable");
            settings = arg1;
            Log.d(TAG, "they are also stored via dynamix");
            getPluginFacade().storeContextPluginSettings(getSessionId(), settings);
        } else {
            Log.d(TAG, "settings given to this method are null");
            settings = getPluginFacade().getContextPluginSettings(getSessionId());
            if (settings != null) {
                Log.d(TAG, "ok that worked");
            } else {
                ContextPluginSettings s = new ContextPluginSettings();
                getPluginFacade().storeContextPluginSettings(getSessionId(), s);
                settings = getPluginFacade().getContextPluginSettings(getSessionId());
                if (settings != null) {
                    Log.d(TAG, "ok, third one is the charm I guess...");
                } else {
                    Log.d(TAG, "the settings are still null");
                }
            }
        }
        timer = new Timer();
        context = this;

    }

    @Override
    public void setPowerScheme(PowerScheme arg0) throws Exception {
        // TODO Auto-generated method stub

    }

    @Override
    public void doManualContextScan() {

    }

    public static String getFoafText() {
        return foaffile;
    }

    public static void updateFoafFile() {
        String foafurl = settings.get(Constants.FOAFURL);
        foafurl = "http://galileo1.zapto.org/tvluke.rdf";
        final SAXBuilder builder = new SAXBuilder();
        try {
            Document doc = builder.build(foafurl);
            Element root = doc.getRootElement();
            List<Element> children = root.getChildren();
            Iterator<Element> childrenIterator = children.iterator();
            while (childrenIterator.hasNext()) {
                Element child = childrenIterator.next();
                List<Element> grandchildren = child.getChildren();
                Iterator<Element> grandchildrenIterator = grandchildren.iterator();
                while (grandchildrenIterator.hasNext()) {
                    Element grandchild = grandchildrenIterator.next();
                    if (grandchild.getName().equals("foaf:name")) {
                        foafname = grandchild.getText();
                    }
                }
            }
        } catch (Exception e) {

        }
    }

}