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A Java library for the Twitter API
/*
* Copyright 2007 Yusuke Yamamoto
*
* 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 twitter4j;
import twitter4j.conf.Configuration;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.Iterator;
/**
* A data class representing Trends.
*
* @author Yusuke Yamamoto - yusuke at mac.com
* @since Twitter4J 2.0.2
*/
/*package*/ final class TrendsJSONImpl extends TwitterResponseImpl implements Trends, java.io.Serializable {
private static final long serialVersionUID = 2054973282133379835L;
private Date asOf;
private Date trendAt;
private Trend[] trends;
private Location location;
@Override
public int compareTo(Trends that) {
return this.trendAt.compareTo(that.getTrendAt());
}
TrendsJSONImpl(HttpResponse res, Configuration conf) throws TwitterException {
super(res);
init(res.asString(), conf.isJSONStoreEnabled());
if (conf.isJSONStoreEnabled()) {
TwitterObjectFactory.clearThreadLocalMap();
TwitterObjectFactory.registerJSONObject(this, res.asString());
}
}
TrendsJSONImpl(String jsonStr) throws TwitterException {
this(jsonStr, false);
}
TrendsJSONImpl(String jsonStr, boolean storeJSON) throws TwitterException {
init(jsonStr, storeJSON);
}
void init(String jsonStr, boolean storeJSON) throws TwitterException {
try {
JSONObject json;
if (jsonStr.startsWith("[")) {
JSONArray array = new JSONArray(jsonStr);
if (array.length() > 0) {
json = array.getJSONObject(0);
} else {
throw new TwitterException("No trends found on the specified woeid");
}
} else {
json = new JSONObject(jsonStr);
}
this.asOf = ParseUtil.parseTrendsDate(json.getString("as_of"));
this.location = extractLocation(json, storeJSON);
JSONArray array = json.getJSONArray("trends");
this.trendAt = asOf;
this.trends = jsonArrayToTrendArray(array, storeJSON);
} catch (JSONException jsone) {
throw new TwitterException(jsone.getMessage(), jsone);
}
}
/*package*/ TrendsJSONImpl(Date asOf, Location location, Date trendAt, Trend[] trends) {
this.asOf = asOf;
this.location = location;
this.trendAt = trendAt;
this.trends = trends;
}
/*package*/
static ResponseList createTrendsList(HttpResponse res, boolean storeJSON) throws
TwitterException {
JSONObject json = res.asJSONObject();
ResponseList trends;
try {
Date asOf = ParseUtil.parseTrendsDate(json.getString("as_of"));
JSONObject trendsJson = json.getJSONObject("trends");
Location location = extractLocation(json, storeJSON);
trends = new ResponseListImpl(trendsJson.length(), res);
Iterator ite = trendsJson.keys();
while (ite.hasNext()) {
String key = (String) ite.next();
JSONArray array = trendsJson.getJSONArray(key);
Trend[] trendsArray = jsonArrayToTrendArray(array, storeJSON);
if (key.length() == 19) {
// current trends
trends.add(new TrendsJSONImpl(asOf, location, ParseUtil.getDate(key
, "yyyy-MM-dd HH:mm:ss"), trendsArray));
} else if (key.length() == 16) {
// daily trends
trends.add(new TrendsJSONImpl(asOf, location, ParseUtil.getDate(key
, "yyyy-MM-dd HH:mm"), trendsArray));
} else if (key.length() == 10) {
// weekly trends
trends.add(new TrendsJSONImpl(asOf, location, ParseUtil.getDate(key
, "yyyy-MM-dd"), trendsArray));
}
}
Collections.sort(trends);
return trends;
} catch (JSONException jsone) {
throw new TwitterException(jsone.getMessage() + ":" + res.asString(), jsone);
}
}
private static Location extractLocation(JSONObject json, boolean storeJSON) throws TwitterException {
if (json.isNull("locations")) {
return null;
}
ResponseList locations;
try {
locations = LocationJSONImpl.createLocationList(json.getJSONArray("locations"), storeJSON);
} catch (JSONException e) {
throw new AssertionError("locations can't be null");
}
Location location;
if (0 != locations.size()) {
location = locations.get(0);
} else {
location = null;
}
return location;
}
private static Trend[] jsonArrayToTrendArray(JSONArray array, boolean storeJSON) throws JSONException {
Trend[] trends = new Trend[array.length()];
for (int i = 0; i < array.length(); i++) {
JSONObject trend = array.getJSONObject(i);
trends[i] = new TrendJSONImpl(trend, storeJSON);
}
return trends;
}
@Override
public Trend[] getTrends() {
return this.trends;
}
@Override
public Location getLocation() {
return location;
}
@Override
public Date getAsOf() {
return asOf;
}
@Override
public Date getTrendAt() {
return trendAt;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof Trends)) return false;
Trends trends1 = (Trends) o;
if (asOf != null ? !asOf.equals(trends1.getAsOf()) : trends1.getAsOf() != null)
return false;
if (trendAt != null ? !trendAt.equals(trends1.getTrendAt()) : trends1.getTrendAt() != null)
return false;
if (!Arrays.equals(trends, trends1.getTrends())) return false;
return true;
}
@Override
public int hashCode() {
int result = asOf != null ? asOf.hashCode() : 0;
result = 31 * result + (trendAt != null ? trendAt.hashCode() : 0);
result = 31 * result + (trends != null ? Arrays.hashCode(trends) : 0);
return result;
}
@Override
public String toString() {
return "TrendsJSONImpl{" +
"asOf=" + asOf +
", trendAt=" + trendAt +
", trends=" + (trends == null ? null : Arrays.asList(trends)) +
'}';
}
}