com.markwatson.linkeddata.DBpediaLookupClientJson.java Source code

Introduction

Here is the source code for com.markwatson.linkeddata.DBpediaLookupClientJson.java

Source

package com.markwatson.linkeddata;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 * Copyright 2015 Mark Watson.  Apache 2 license.
 */
public class DBpediaLookupClientJson {
    public static String lookup(String query) {
        StringBuffer sb = new StringBuffer();
        try {
            HttpClient httpClient = new DefaultHttpClient();
            String query2 = query.replaceAll(" ", "+");
            HttpGet getRequest = new HttpGet(
                    "http://lookup.dbpedia.org/api/search.asmx/KeywordSearch?QueryString=" + query2);
            getRequest.addHeader("accept", "application/json");
            HttpResponse response = httpClient.execute(getRequest);
            if (response.getStatusLine().getStatusCode() != 200)
                return "Server error";

            BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            httpClient.getConnectionManager().shutdown();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString();
    }
}