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// Portions Copyright [2019] Payara Foundation and/or affiliates

package com.sun.enterprise.universal.process;

import java.io.*;


///////////////////////////////////////////////////////////////////////////

class ProcessStreamDrainerWorker implements Runnable
{
    ProcessStreamDrainerWorker(InputStream in, PrintStream Redirect, boolean save)
    {
        if(in == null) {
            throw new NullPointerException("InputStream argument was null.");
        }
        
        reader = new BufferedInputStream(in);
        redirect = Redirect;

        if(save) {
            sb = new StringBuilder();
        }
    }
    
    @Override
    public void run() {
        if (reader == null) {
            return;
        }

        try {
            int count = 0;
            byte[] buffer = new byte[4096];

            while ((count = reader.read(buffer)) != -1) {
                if (redirect != null) {
                    redirect.write(buffer, 0, count);
                }

                if (sb != null) {
                    sb.append(new String(buffer, 0, count));
                }
            }
        } catch (IOException e) {
        }
    }

    String getString() {
        if(sb != null) {
            return sb.toString();
        } else {
            return "";
        }
    }
    
    private final   BufferedInputStream reader;
    private final   PrintStream         redirect;
    private         StringBuilder       sb;
}