outputtostring.java

MoMEUnit是一个单元测试的J2ME的应用程序xUnit架构实例。这是来自JUnit框架

package org.momeunit.ant.core;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

/**
 * Class that cumulates input read from {@link InputStream}. Provides methods
 * {@link #getOutputString()} for accessing cumulated input as string. Sends
 * input to pipe if requested.
 * 
 * @author Sergio Morozov
 * @version 1.1.2
 */
public class OutputToString extends OutputPipe
{

  private StringBuffer sb = null;

  private boolean endOfOutput = false;

  /**
   * Instantiates OutputToString object with given InputStream.
   * 
   * @param pipeIn
   *          the InputStream to read from.
   * @since 1.1
   */
  public OutputToString(InputStream pipeIn)
  {
    super(pipeIn);
  }

  /**
   * Reads input from {@link InputStream} and cumulates it until input is
   * closed. Sends input to pipe if requested.
   * 
   * @see OutputPipe#run()
   */
  public void run()
  {
    BufferedReader reader = new BufferedReader(new InputStreamReader(this
        .getInputStream()));
    this.sb = new StringBuffer();
    OutputStream out = this.getOutpuStream();
    try
    {
      for (String line; (line = reader.readLine()) != null;)
      {
        sb.append(line).append('\n');
        if (out != null) out.write((line + '\n').getBytes());
      }
    } catch (IOException e)
    {} finally
    {
      setEndOfOutput();
      try
      {
        if (out != null && out != System.out && out != System.err) out.close();
        if (reader != null) reader.close();
      } catch (IOException e)
      {}
    }
  }

  private synchronized void setEndOfOutput()
  {
    this.endOfOutput = true;
    notifyAll();
  }

  /**
   * Returns gathered input as {@link String}.
   * 
   * @return the cumulated input as {@link String}.
   * @since 1.1
   */
  public synchronized String getOutputString()
  {
    while (!this.endOfOutput)
    {
      try
      {
        wait();
      } catch (InterruptedException e)
      {}
    }
    return this.sb.toString();
  }
}