Android Open Source - BackbeamAndroid Utils

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License

The source code is released under:

Copyright (c) 2012 Level Apps S.L. <http://backbeam.io> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software...

Java Source Code

package io.backbeam;
//w  w w.j av a 2  s.co m
import java.io.IOException;
import java.io.Reader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import android.util.Base64;

public class Utils {
  
  public static String urlEncode(String s) {
    try {
      return URLEncoder.encode(s, "UTF-8");
    } catch (UnsupportedEncodingException e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String reader2String(Reader reader) throws IOException {
        try {
            StringWriter writer = new StringWriter();
            char[] buffer = new char[1024];
            int count;
            while ((count = reader.read(buffer)) != -1) {
                writer.write(buffer, 0, count);
            }
            return writer.toString();
        } finally {
            reader.close();
        }
    }
  
  public static String hmacSha1(String key, String message) {
        try {
            Mac mac = Mac.getInstance("HmacSHA1");
            SecretKeySpec secret = new SecretKeySpec(key.getBytes("UTF-8"), mac.getAlgorithm());
            mac.init(secret);
            byte[] digest = mac.doFinal(message.getBytes("UTF-8"));
            return Base64.encodeToString(digest, Base64.NO_WRAP);
        } catch (Exception e) {
            throw new BackbeamException(e);
        }
  }
  
  public static String hexString(byte[] b) {
    StringBuilder result = new StringBuilder();
    for (int i=0; i<b.length; i++) {
      result.append(Integer.toString(( b[i] & 0xff) + 0x100, 16).substring(1));
    }
    return result.toString();
  }
  
  public static byte[] sha1(byte[] input) {
      MessageDigest md = null;
      try {
          md = MessageDigest.getInstance("SHA-1");
      } catch(NoSuchAlgorithmException e) {
          throw new RuntimeException(e); // should never happen
      } 
      return md.digest(input);
  }
  
  public static List<String> stringsFromParams(Object[] params) {
    if (params == null) return Collections.emptyList();
    List<String> list = new ArrayList<String>(params.length);
    for (Object obj : params) {
      list.add(stringFromObject(obj, true));
    }
    return list;
  }
  
  public static String stringFromObject(Object obj, boolean addEntity) {
    if (obj instanceof String) {
      return (String) obj;
    } else if (obj instanceof BackbeamObject) {
      BackbeamObject o = (BackbeamObject) obj;
      if (addEntity) {
        return o.getEntity()+"/"+o.getId();
      } else {
        return o.getId();
      }
    } else if (obj instanceof Date) {
      return ""+((Date) obj).getTime();
    } else if (obj instanceof Location) {
      Location location = (Location) obj;
      String s = location.getLatitude()+","+location.getLongitude()+","+location.getAltitude()+"|";
      if (location.getAddress() != null) s += location.getAddress();
      return s;
    } else if (obj instanceof CollectionConstraint) {
      return obj.toString();
    } else if (obj instanceof GregorianCalendar) {
      GregorianCalendar value = (GregorianCalendar)obj;
      int year = value.get(Calendar.YEAR);
      int month = value.get(Calendar.MONTH) + 1;
      int day = value.get(Calendar.DAY_OF_MONTH);
      return String.format("%04d-%02d-%02d", year, month, day);
    } else if (obj instanceof Boolean) {
      Boolean value = (Boolean)obj;
      return value.booleanValue() ? "1" : "0";
    }
    return null;
  }

}

Java Source Code List

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