de.thingweb.repository.RepositoryClient.java Source code

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Here is the source code for de.thingweb.repository.RepositoryClient.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Siemens AG and the thingweb community
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * Created by Sebastian Kaebisch on 10.12.2015.
 */

// UNIRES, Jetty

package de.thingweb.repository;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import org.json.JSONArray;

/** Class to interact with a TD repository */
public class RepositoryClient {

    private String repository_uri;
    private int repository_port;

    /** Constructer set up the endpoint address of the TD repository */
    public RepositoryClient(String repository_uri, int repository_port) {

        this.repository_uri = repository_uri;
        this.repository_port = repository_port;
    }

    /**  This method takes a properties which you are looking for or a SPARQL query  
     * @param search properties or a SPARQL query
     * @return JSON array of relevant TD files (=empty array means no match)
     * */
    public JSONArray tdSearch(String search) throws Exception {

        URL myURL = new URL("http://" + repository_uri + ":" + repository_port + "/td?query=" + search);
        HttpURLConnection myURLConnection = (HttpURLConnection) myURL.openConnection();
        myURLConnection.setRequestMethod("GET");
        myURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        myURLConnection.setDoInput(true);
        myURLConnection.setDoOutput(true);

        InputStream in = myURLConnection.getInputStream();

        JSONArray jsonLDs = new JSONArray(streamToString(in));

        System.out.println(streamToString(in));

        return jsonLDs;
    }

    /** Brings input stream into string representation  */
    private String streamToString(InputStream in) throws IOException {
        StringBuilder out = new StringBuilder();
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        for (String line = br.readLine(); line != null; line = br.readLine())
            out.append(line);
        br.close();
        return out.toString();
    }
}