| /*
|
| * Copyright 1999-2011 Alibaba Group.
|
| *
|
| * 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.alibaba.dubbo.common.io; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.UnsupportedEncodingException; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * UnsafeByteArrayOutputStream. |
| * |
| * @author qian.lei |
| */ |
| |
| public class UnsafeByteArrayOutputStream extends OutputStream |
| { |
| protected byte mBuffer[]; |
| |
| protected int mCount; |
| |
| public UnsafeByteArrayOutputStream() |
| { |
| this(32); |
| } |
| |
| public UnsafeByteArrayOutputStream(int size) |
| { |
| if( size < 0 ) |
| throw new IllegalArgumentException("Negative initial size: " + size); |
| mBuffer = new byte[size]; |
| } |
| |
| public void write(int b) |
| { |
| int newcount = mCount + 1; |
| if( newcount > mBuffer.length ) |
| mBuffer = Bytes.copyOf(mBuffer, Math.max(mBuffer.length << 1, newcount)); |
| mBuffer[mCount] = (byte)b; |
| mCount = newcount; |
| } |
| |
| public void write(byte b[], int off, int len) |
| { |
| if( ( off < 0 ) || ( off > b.length ) || ( len < 0 ) || ( ( off + len ) > b.length ) || ( ( off + len ) < 0 ) ) |
| throw new IndexOutOfBoundsException(); |
| if( len == 0 ) |
| return; |
| int newcount = mCount + len; |
| if( newcount > mBuffer.length ) |
| mBuffer = Bytes.copyOf(mBuffer, Math.max(mBuffer.length << 1, newcount)); |
| System.arraycopy(b, off, mBuffer, mCount, len); |
| mCount = newcount; |
| } |
| |
| public int size() |
| { |
| return mCount; |
| } |
| |
| public void reset() |
| { |
| mCount = 0; |
| } |
| |
| public byte[] toByteArray() |
| { |
| return Bytes.copyOf(mBuffer, mCount); |
| } |
| |
| public ByteBuffer toByteBuffer() |
| { |
| return ByteBuffer.wrap(mBuffer, 0, mCount); |
| } |
| |
| public void writeTo(OutputStream out) throws IOException |
| { |
| out.write(mBuffer, 0, mCount); |
| } |
| |
| public String toString() |
| { |
| return new String(mBuffer, 0, mCount); |
| } |
| |
| public String toString(String charset) throws UnsupportedEncodingException |
| { |
| return new String(mBuffer, 0, mCount, charset); |
| } |
| |
| public void close() throws IOException |
| {} |
| } |