/*license*\
XBN-Java: Copyright (C) 2014, Jeff Epstein (aliteralmind __DASH__ github __AT__ yahoo __DOT__ com)
This software is dual-licensed under the:
- Lesser General Public License (LGPL) version 3.0 or, at your option, any later version;
- Apache Software License (ASL) version 2.0.
Either license may be applied at your discretion. More information may be found at
- http://en.wikipedia.org/wiki/Multi-licensing.
The text of both licenses is available in the root directory of this project, under the names "LICENSE_lgpl-3.0.txt" and "LICENSE_asl-2.0.txt". The latest copies may be downloaded at:
- LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
- ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
\*license*/
package com.github.xbn.io;
import com.github.xbn.text.CrashIfString;
import java.io.PrintStream;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
/**
<p>Temporarily redirects console output into a string--useful for capturing output from another Java application.</p>
* @since 0.1.0
* @author Copyright (C) 2014, Jeff Epstein ({@code aliteralmind __DASH__ github __AT__ yahoo __DOT__ com}), dual-licensed under the LGPL (version 3.0 or later) or the ASL (version 2.0). See source code for details. <a href="http://xbnjava.aliteralmind.com">{@code http://xbnjava.aliteralmind.com}</a>, <a href="https://github.com/aliteralmind/xbnjava">{@code https://github.com/aliteralmind/xbnjava}</a>
**/
public class PrintStreamForString {
public String sCharSetName = null;
public ByteArrayOutputStream baos = null;
public PrintStream psNew = null;
public PrintStream psOrig = null;
public PrintStreamForString() {
this("US-ASCII");
}
public PrintStreamForString(String selfCmprharSetName) {
baos = new ByteArrayOutputStream();
psNew = new PrintStream(baos);
CrashIfString.nullEmpty(selfCmprharSetName, "selfCmprharSetName", null);
sCharSetName = selfCmprharSetName;
}
public PrintStreamForString setSystemOutTo() {
psOrig = System.out;
System.setOut(psNew);
return this;
}
public void resetSystemOut() {
if(psOrig == null) {
throw new NullPointerException("psOrig (must first setSystemOutTo())");
}
System.setOut(psOrig);
psOrig = null;
}
public String getStringAndReset() {
String s = toString();
baos.reset();
resetSystemOut();
return s;
}
public String toString() {
try {
return baos.toString(sCharSetName);
} catch(UnsupportedEncodingException uex) {
throw new RuntimeException("sCharSetName=\"" + sCharSetName + "\"", uex);
}
}
}