com.michael.feng.utils.YahooWeather4a.WOEIDUtils.java Source code

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Here is the source code for com.michael.feng.utils.YahooWeather4a.WOEIDUtils.java

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/*
 * Copyright (C) 2011 The Android Open Source Project
 * Copyright (C) 2012 Zhenghong Wang
 *
 * 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 com.michael.feng.utils.YahooWeather4a;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import android.content.Context;
import android.util.Log;
import android.widget.Toast;

public class WOEIDUtils {

    public static final String WOEID_NOT_FOUND = "WOEID_NOT_FOUND";
    private final String yahooapisBase = "http://query.yahooapis.com/v1/public/yql?q=select*from%20geo.places%20where%20text=";
    private final String yahooapisFormat = "&format=xml";
    private String yahooAPIsQuery;

    public static WOEIDUtils getInstance() {
        return new WOEIDUtils();
    }

    public String getWOEIDid(Context context, String cityName) {
        return queryWOEIDfromYahooAPIs(context, cityName);
    }

    private String queryWOEIDfromYahooAPIs(Context context, String uriPlace) {
        Log.d("tag", "QueryYahooApis");

        yahooAPIsQuery = yahooapisBase + "%22" + uriPlace + "%22" + yahooapisFormat;

        yahooAPIsQuery = yahooAPIsQuery.replace(" ", "%20");

        Log.d("tag", "yahooAPIsQuery: " + yahooAPIsQuery);

        String woeidString = queryYahooWeather(context, yahooAPIsQuery);
        Document woeidDoc = convertStringToDocument(context, woeidString);
        return getFirstMatchingWOEID(woeidDoc);

    }

    private String queryYahooWeather(Context context, String queryString) {
        Log.d("tag", "QueryYahooWeather");
        String qResult = "";
        //      queryString = Uri.encode(queryString);

        HttpClient httpClient = new DefaultHttpClient();

        // return Uri.encode(queryString);

        HttpGet httpGet = new HttpGet(queryString);

        try {
            HttpEntity httpEntity = httpClient.execute(httpGet).getEntity();

            if (httpEntity != null) {
                InputStream inputStream = httpEntity.getContent();
                Reader in = new InputStreamReader(inputStream);
                BufferedReader bufferedreader = new BufferedReader(in);
                StringBuilder stringBuilder = new StringBuilder();

                String stringReadLine = null;

                while ((stringReadLine = bufferedreader.readLine()) != null) {
                    stringBuilder.append(stringReadLine + "\n");
                }

                qResult = stringBuilder.toString();
            }

        } catch (ClientProtocolException e) {
            e.printStackTrace();
            Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
        }

        return qResult;

    }

    private Document convertStringToDocument(Context context, String src) {
        Log.d("tag", "convertStringToDocument");
        Document dest = null;

        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder parser;

        try {
            parser = dbFactory.newDocumentBuilder();
            dest = parser.parse(new ByteArrayInputStream(src.getBytes()));
        } catch (ParserConfigurationException e1) {
            e1.printStackTrace();
            Toast.makeText(context, e1.toString(), Toast.LENGTH_LONG).show();
        } catch (SAXException e) {
            e.printStackTrace();
            Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
        }

        return dest;

    }

    private String getFirstMatchingWOEID(Document srcDoc) {
        Log.d("tag", "parserWOEID");

        try {
            NodeList nodeListDescription = srcDoc.getElementsByTagName("woeid");
            if (nodeListDescription.getLength() > 0) {
                Node node = nodeListDescription.item(0);
                return node.getTextContent();
            } else {
                return WOEID_NOT_FOUND;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return WOEID_NOT_FOUND;
        }

    }
}