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package org.scribe.utils;

import java.io.*;

/**
 * Utils to deal with Streams.
 *  
 * @author Pablo Fernandez
 */
public class StreamUtils
{
  /**
   * Returns the stream contents as an UTF-8 encoded string
   * 
   * @param is input stream
   * @return string contents
   */
  public static String getStreamContents(InputStream is)
  {
    Preconditions.checkNotNull(is, "Cannot get String from a null object");
    try
    {
      final char[] buffer = new char[0x10000];
      StringBuilder out = new StringBuilder();
      Reader in = new InputStreamReader(is, "UTF-8");
      int read;
      do
      {
        read = in.read(buffer, 0, buffer.length);
        if (read > 0)
        {
          out.append(buffer, 0, read);
        }
      } while (read >= 0);
      in.close();
      return out.toString();
    } catch (IOException ioe)
    {
      throw new IllegalStateException("Error while reading response body", ioe);
    }
  }
}