// Copyright (C) 2014 Tom <tw201207@gmail.com>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.gitblit.utils;
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import java.io.ByteArrayOutputStream;
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/**
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* A {@link ByteArrayOutputStream} that can be reset to a specified position.
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*
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* @author Tom <tw201207@gmail.com>
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*/
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public class ResettableByteArrayOutputStream extends ByteArrayOutputStream {
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/**
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* Reset the stream to the given position. If {@code mark} is <= 0, see {@link #reset()}.
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* A no-op if the stream contains less than {@code mark} bytes. Otherwise, resets the
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* current writing position to {@code mark}. Previously allocated buffer space will be
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* reused in subsequent writes.
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*
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* @param mark
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* to set the current writing position to.
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*/
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public synchronized void resetTo(int mark) {
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if (mark <= 0) {
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reset();
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} else if (mark < count) {
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count = mark;
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}
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}
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}
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