Utils.java

/*
 * Copyright (c) 2010, MoPub Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'MoPub Inc.' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.mopub.mobileads;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.json.JSONObject;
import org.json.JSONTokener;

public class Utils {
    private Utils() {}

	public static String sha1(String s) {
		try { 
			MessageDigest digest = MessageDigest.getInstance("SHA-1");
			digest.update(s.getBytes());
			byte messageDigest[] = digest.digest();
			
			StringBuffer hexString = new StringBuffer();
			for (int i = 0; i < messageDigest.length; i++) {
				hexString.append(Integer.toHexString((0xFF & messageDigest[i]) | 0x100).substring(1));
			}
			return hexString.toString();
		} catch (NoSuchAlgorithmException e) {
			return "";
		}
	}
	
    public static Map<String,String> jsonStringToMap(String jsonParams) throws Exception {
        Map<String,String> jsonMap = new HashMap<String,String>();
        
        if (jsonParams == null || jsonParams.equals("")) return jsonMap;
        
        JSONObject jsonObject = (JSONObject) new JSONTokener(jsonParams).nextValue();
        Iterator<?> keys = jsonObject.keys();
        
        while (keys.hasNext()) {
            String key = (String) keys.next();
            jsonMap.put(key, jsonObject.getString(key));
        }
        
        return jsonMap;
    }
}