org.n52.twitter.model.TwitterMessage.java Source code

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Here is the source code for org.n52.twitter.model.TwitterMessage.java

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/**
 * Copyright (C) 2015 - 2015 52North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * license version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */
package org.n52.twitter.model;

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.n52.socialmedia.model.HumanVisualPerceptionObservation;
import org.n52.socialmedia.model.Procedure;

import twitter4j.Status;

public class TwitterMessage implements HumanVisualPerceptionObservation {

    private static final String TWEET_URL = "https://twitter.com/%s/status/%s";

    private static final String USER_URL = "https://twitter.com/%s";

    private String id;
    private TwitterLocation location;
    private DateTime createdTime;
    private String link;
    private String message;
    private Procedure procedure;

    private TwitterMessage() {
    }

    public static TwitterMessage create(Status tweet) {
        if (isGeolocated(tweet)) {
            TwitterMessage result = new TwitterMessage();
            result.id = Long.toString(tweet.getId());
            result.procedure = new Procedure(tweet.getUser().getScreenName(),
                    String.format(USER_URL, tweet.getUser().getScreenName()));
            result.location = new TwitterLocation(tweet.getGeoLocation(), tweet.getPlace());
            result.createdTime = new DateTime(tweet.getCreatedAt(), DateTimeZone.UTC);
            result.link = String.format(TWEET_URL, tweet.getUser().getScreenName(), Long.toString(tweet.getId()));
            result.message = tweet.getText();
            return result;
        }
        return null;
    }

    private static boolean isGeolocated(Status status) {
        return status.getGeoLocation() != null && status.getPlace() != null
                && (status.getPlace().getBoundingBoxCoordinates() != null
                        || status.getPlace().getGeometryCoordinates() != null)
                && status.getPlace().getId() != null && !status.getPlace().getId().isEmpty()
                && status.getPlace().getName() != null && !status.getPlace().getName().isEmpty();
    }

    /*
     * ACCESSOR 
     */

    @Override
    public TwitterLocation getLocation() {
        return location;
    }

    @Override
    public DateTime getPhenomenonTime() {
        return createdTime;
    }

    @Override
    public DateTime getResultTime() {
        return createdTime;
    }

    @Override
    public String getIdentifier() {
        return id;
    }

    @Override
    public Procedure getProcedure() {
        return procedure;
    }

    @Override
    public String getResultHref() {
        return link;
    }

    @Override
    public String getResult() {
        return String.format("\"%s\"", message);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((createdTime == null) ? 0 : createdTime.hashCode());
        result = prime * result + ((id == null) ? 0 : id.hashCode());
        result = prime * result + ((link == null) ? 0 : link.hashCode());
        result = prime * result + ((location == null) ? 0 : location.hashCode());
        result = prime * result + ((message == null) ? 0 : message.hashCode());
        result = prime * result + ((procedure == null) ? 0 : procedure.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        TwitterMessage other = (TwitterMessage) obj;
        if (createdTime == null) {
            if (other.createdTime != null)
                return false;
        } else if (!createdTime.equals(other.createdTime))
            return false;
        if (id == null) {
            if (other.id != null)
                return false;
        } else if (!id.equals(other.id))
            return false;
        if (link == null) {
            if (other.link != null)
                return false;
        } else if (!link.equals(other.link))
            return false;
        if (location == null) {
            if (other.location != null)
                return false;
        } else if (!location.equals(other.location))
            return false;
        if (message == null) {
            if (other.message != null)
                return false;
        } else if (!message.equals(other.message))
            return false;
        if (procedure == null) {
            if (other.procedure != null)
                return false;
        } else if (!procedure.equals(other.procedure))
            return false;
        return true;
    }
}