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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.admin.amx.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
/**
Directs output to a file. Lazy initialization; the file
is not actually opened until output is sent.
*/
public final class FileOutput implements Output
{
private volatile PrintStream mOut;
private final File mFile;
private final boolean mAppend;
public FileOutput(final File f)
{
this(f, false);
}
public FileOutput(final File f, boolean append)
{
mOut = null;
mFile = f;
mAppend = append;
}
private void lazyInit()
{
if (mOut == null)
{
synchronized (this)
{
if (mOut == null)
{
try
{
if ((!mAppend) && mFile.exists())
{
if (!mFile.delete()) {
throw new Exception("cannot delete file: " + mFile);
}
}
mOut = new PrintStream(new FileOutputStream(mFile, mAppend));
}
catch (Exception e)
{
// don't use System.out/err; possible infinite recursion
throw new RuntimeException("Can't create file: " + mFile +
", exception = " + e);
}
}
}
}
}
public void print(final Object o)
{
lazyInit();
mOut.print(o.toString());
}
public void println(Object o)
{
lazyInit();
mOut.println(o.toString());
}
public void printError(final Object o)
{
lazyInit();
println("ERROR: " + o);
}
public boolean getDebug()
{
lazyInit();
return (false);
}
public void printDebug(final Object o)
{
lazyInit();
println("DEBUG: " + o);
}
public void close()
{
if (mOut != null)
{
try
{
mOut.close();
}
finally
{
mOut = null;
}
}
}
};