| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.ignite.internal.binary.streams; |
| |
| import java.util.Arrays; |
| import org.apache.ignite.internal.util.GridUnsafe; |
| |
| import static org.apache.ignite.internal.util.GridUnsafe.BIG_ENDIAN; |
| |
| /** |
| * Binary heap input stream. |
| */ |
| public final class BinaryHeapInputStream extends BinaryAbstractInputStream { |
| /** |
| * Create stream with pointer set at the given position. |
| * |
| * @param data Data. |
| * @param pos Position. |
| * @return Stream. |
| */ |
| public static BinaryHeapInputStream create(byte[] data, int pos) { |
| assert pos < data.length; |
| |
| BinaryHeapInputStream stream = new BinaryHeapInputStream(data); |
| |
| stream.pos = pos; |
| |
| return stream; |
| } |
| |
| /** Data. */ |
| private byte[] data; |
| |
| /** |
| * Constructor. |
| * |
| * @param data Data. |
| */ |
| public BinaryHeapInputStream(byte[] data) { |
| this.data = data; |
| |
| len = data.length; |
| } |
| |
| /** |
| * @return Copy of this stream. |
| */ |
| public BinaryHeapInputStream copy() { |
| BinaryHeapInputStream in = new BinaryHeapInputStream(Arrays.copyOf(data, data.length)); |
| |
| in.position(pos); |
| |
| return in; |
| } |
| |
| /** |
| * Method called from JNI to resize stream. |
| * |
| * @param len Required length. |
| * @return Underlying byte array. |
| */ |
| public byte[] resize(int len) { |
| if (data.length < len) { |
| byte[] data0 = new byte[len]; |
| |
| System.arraycopy(data, 0, data0, 0, data.length); |
| |
| data = data0; |
| } |
| |
| return data; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int remaining() { |
| return data.length - pos; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int capacity() { |
| return data.length; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public byte[] array() { |
| return data; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public byte[] arrayCopy() { |
| byte[] res = new byte[len]; |
| |
| System.arraycopy(data, 0, res, 0, len); |
| |
| return res; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean hasArray() { |
| return true; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected byte readByteAndShift() { |
| return data[pos++]; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected void copyAndShift(Object target, long off, int len) { |
| GridUnsafe.copyMemory(data, GridUnsafe.BYTE_ARR_OFF + pos, target, off, len); |
| |
| shift(len); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected short readShortFast() { |
| long off = GridUnsafe.BYTE_ARR_OFF + pos; |
| |
| return BIG_ENDIAN ? GridUnsafe.getShortLE(data, off) : GridUnsafe.getShort(data, off); |
| |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected char readCharFast() { |
| long off = GridUnsafe.BYTE_ARR_OFF + pos; |
| |
| return BIG_ENDIAN ? GridUnsafe.getCharLE(data, off) : GridUnsafe.getChar(data, off); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected int readIntFast() { |
| long off = GridUnsafe.BYTE_ARR_OFF + pos; |
| |
| return BIG_ENDIAN ? GridUnsafe.getIntLE(data, off) : GridUnsafe.getInt(data, off); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected long readLongFast() { |
| long off = GridUnsafe.BYTE_ARR_OFF + pos; |
| |
| return BIG_ENDIAN ? GridUnsafe.getLongLE(data, off) : GridUnsafe.getLong(data, off); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected byte readBytePositioned0(int pos) { |
| return GridUnsafe.getByte(data, GridUnsafe.BYTE_ARR_OFF + pos); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected short readShortPositioned0(int pos) { |
| long off = GridUnsafe.BYTE_ARR_OFF + pos; |
| |
| return BIG_ENDIAN ? GridUnsafe.getShortLE(data, off) : GridUnsafe.getShort(data, off); |
| |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected int readIntPositioned0(int pos) { |
| long off = GridUnsafe.BYTE_ARR_OFF + pos; |
| |
| return BIG_ENDIAN ? GridUnsafe.getIntLE(data, off) : GridUnsafe.getInt(data, off); |
| } |
| } |