| // Copyright (C) 2014 Tom <tw201207@gmail.com> |
| // |
| // 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. |
| package com.gitblit.utils; |
| |
| import java.io.ByteArrayOutputStream; |
| |
| /** |
| * A {@link ByteArrayOutputStream} that can be reset to a specified position. |
| * |
| * @author Tom <tw201207@gmail.com> |
| */ |
| public class ResettableByteArrayOutputStream extends ByteArrayOutputStream { |
| |
| /** |
| * Reset the stream to the given position. If {@code mark} is <= 0, see {@link #reset()}. |
| * A no-op if the stream contains less than {@code mark} bytes. Otherwise, resets the |
| * current writing position to {@code mark}. Previously allocated buffer space will be |
| * reused in subsequent writes. |
| * |
| * @param mark |
| * to set the current writing position to. |
| */ |
| public synchronized void resetTo(int mark) { |
| if (mark <= 0) { |
| reset(); |
| } else if (mark < count) { |
| count = mark; |
| } |
| } |
| |
| } |