com.unboundid.util.NullOutputStream Maven / Gradle / Ivy
/*
* Copyright 2008-2021 Ping Identity Corporation
* All Rights Reserved.
*/
/*
* Copyright 2008-2021 Ping Identity Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Copyright (C) 2008-2021 Ping Identity Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (GPLv2 only)
* or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
package com.unboundid.util;
import java.io.OutputStream;
import java.io.PrintStream;
/**
* This class provides an implementation of a {@code java.io.OutputStream} in
* which any data written to it is simply discarded.
*/
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class NullOutputStream
extends OutputStream
{
/**
* The singleton instance of this null output stream that may be reused
* instead of creating a new instance.
*/
@NotNull private static final NullOutputStream INSTANCE =
new NullOutputStream();
/**
* The singleton instance of a print stream based on this null output stream
* that may be reused instead of creating a new instance.
*/
@NotNull private static final PrintStream PRINT_STREAM =
new PrintStream(INSTANCE);
/**
* Creates a new null output stream instance.
*/
public NullOutputStream()
{
// No implementation is required.
}
/**
* Retrieves an instance of this null output stream.
*
* @return An instance of this null output stream.
*/
@NotNull()
public static NullOutputStream getInstance()
{
return INSTANCE;
}
/**
* Retrieves a print stream based on this null output stream.
*
* @return A print stream based on this null output stream.
*/
@NotNull()
public static PrintStream getPrintStream()
{
return PRINT_STREAM;
}
/**
* Closes this output stream. This has no effect.
*/
@Override()
public void close()
{
// No implementation is required.
}
/**
* Flushes the contents of this output stream. This has no effect.
*/
@Override()
public void flush()
{
// No implementation is required.
}
/**
* Writes the contents of the provided byte array over this output stream.
* This has no effect.
*
* @param b The byte array containing the data to be written.
*/
@Override()
public void write(@NotNull final byte[] b)
{
// No implementation is required.
}
/**
* Writes the contents of the provided byte array over this output stream.
* This has no effect.
*
* @param b The byte array containing the data to be written.
* @param off The position in the array at which to start writing data.
* @param len The number of bytes to be written.
*/
@Override()
public void write(@NotNull final byte[] b, final int off, final int len)
{
// No implementation is required.
}
/**
* Writes the provided byte over this input stream. This has no effect.
*
* @param b The byte to be written.
*/
@Override()
public void write(final int b)
{
// No implementation is required.
}
}