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com.hazelcast.internal.serialization.impl.UnsafeObjectDataInput Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.internal.serialization.impl;
import com.hazelcast.internal.serialization.SerializationService;
import com.hazelcast.nio.UnsafeHelper;
import java.io.IOException;
import java.nio.ByteOrder;
import static com.hazelcast.nio.Bits.CHAR_SIZE_IN_BYTES;
import static com.hazelcast.nio.Bits.DOUBLE_SIZE_IN_BYTES;
import static com.hazelcast.nio.Bits.FLOAT_SIZE_IN_BYTES;
import static com.hazelcast.nio.Bits.INT_SIZE_IN_BYTES;
import static com.hazelcast.nio.Bits.LONG_SIZE_IN_BYTES;
import static com.hazelcast.nio.Bits.NULL_ARRAY_LENGTH;
import static com.hazelcast.nio.Bits.SHORT_SIZE_IN_BYTES;
class UnsafeObjectDataInput extends ByteArrayObjectDataInput {
UnsafeObjectDataInput(byte[] buffer, SerializationService service) {
super(buffer, service, ByteOrder.nativeOrder());
}
UnsafeObjectDataInput(byte[] buffer, int offset, SerializationService service) {
super(buffer, offset, service, ByteOrder.nativeOrder());
}
@Override
public int read() throws IOException {
return (pos < size) ? UnsafeHelper.UNSAFE.getByte(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + pos++) & 0xFF : -1;
}
@Override
public int read(int position) throws IOException {
return (position < size) ? UnsafeHelper.UNSAFE
.getByte(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + position) : NULL_ARRAY_LENGTH;
}
@Override
public char readChar(int position) throws IOException {
checkAvailable(position, CHAR_SIZE_IN_BYTES);
return UnsafeHelper.UNSAFE.getChar(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + position);
}
@Override
public double readDouble() throws IOException {
final double d = readDouble(pos);
pos += DOUBLE_SIZE_IN_BYTES;
return d;
}
@Override
public double readDouble(int position) throws IOException {
checkAvailable(position, DOUBLE_SIZE_IN_BYTES);
return UnsafeHelper.UNSAFE.getDouble(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + position);
}
@Override
public float readFloat() throws IOException {
final float f = readFloat(pos);
pos += FLOAT_SIZE_IN_BYTES;
return f;
}
@Override
public float readFloat(int position) throws IOException {
checkAvailable(position, FLOAT_SIZE_IN_BYTES);
return UnsafeHelper.UNSAFE.getFloat(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + position);
}
@Override
public int readInt(int position) throws IOException {
checkAvailable(position, INT_SIZE_IN_BYTES);
return UnsafeHelper.UNSAFE.getInt(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + position);
}
@Override
public int readInt(int position, ByteOrder byteOrder) throws IOException {
int v = readInt(position);
if (byteOrder != ByteOrder.nativeOrder()) {
v = Integer.reverseBytes(v);
}
return v;
}
@Override
public long readLong(int position) throws IOException {
checkAvailable(position, LONG_SIZE_IN_BYTES);
return UnsafeHelper.UNSAFE.getLong(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + position);
}
@Override
public long readLong(int position, ByteOrder byteOrder) throws IOException {
long v = readLong(position);
if (byteOrder != ByteOrder.nativeOrder()) {
v = Long.reverseBytes(v);
}
return v;
}
@Override
public short readShort(int position) throws IOException {
checkAvailable(position, SHORT_SIZE_IN_BYTES);
return UnsafeHelper.UNSAFE.getShort(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + position);
}
@Override
public short readShort(int position, ByteOrder byteOrder) throws IOException {
short v = readShort(position);
if (byteOrder != ByteOrder.nativeOrder()) {
v = Short.reverseBytes(v);
}
return v;
}
@Override
public char[] readCharArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
char[] values = new char[len];
memCopy(values, UnsafeHelper.CHAR_ARRAY_BASE_OFFSET, len, UnsafeHelper.CHAR_ARRAY_INDEX_SCALE);
return values;
}
return new char[0];
}
@Override
public boolean[] readBooleanArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
boolean[] values = new boolean[len];
memCopy(values, UnsafeHelper.BOOLEAN_ARRAY_BASE_OFFSET, len, UnsafeHelper.BOOLEAN_ARRAY_INDEX_SCALE);
return values;
}
return new boolean[0];
}
@Override
public byte[] readByteArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
byte[] values = new byte[len];
memCopy(values, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET, len, UnsafeHelper.BYTE_ARRAY_INDEX_SCALE);
return values;
}
return new byte[0];
}
@Override
public int[] readIntArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
int[] values = new int[len];
memCopy(values, UnsafeHelper.INT_ARRAY_BASE_OFFSET, len, UnsafeHelper.INT_ARRAY_INDEX_SCALE);
return values;
}
return new int[0];
}
@Override
public long[] readLongArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
long[] values = new long[len];
memCopy(values, UnsafeHelper.LONG_ARRAY_BASE_OFFSET, len, UnsafeHelper.LONG_ARRAY_INDEX_SCALE);
return values;
}
return new long[0];
}
@Override
public double[] readDoubleArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
double[] values = new double[len];
memCopy(values, UnsafeHelper.DOUBLE_ARRAY_BASE_OFFSET, len, UnsafeHelper.DOUBLE_ARRAY_INDEX_SCALE);
return values;
}
return new double[0];
}
@Override
public float[] readFloatArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
float[] values = new float[len];
memCopy(values, UnsafeHelper.FLOAT_ARRAY_BASE_OFFSET, len, UnsafeHelper.FLOAT_ARRAY_INDEX_SCALE);
return values;
}
return new float[0];
}
@Override
public short[] readShortArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
short[] values = new short[len];
memCopy(values, UnsafeHelper.SHORT_ARRAY_BASE_OFFSET, len, UnsafeHelper.SHORT_ARRAY_INDEX_SCALE);
return values;
}
return new short[0];
}
private void memCopy(final Object dest, final long destOffset, final int length, final int indexScale) throws IOException {
if (length < 0) {
throw new NegativeArraySizeException("Destination length is negative: " + length);
}
int remaining = length * indexScale;
checkAvailable(pos, remaining);
long offset = destOffset;
while (remaining > 0) {
int chunk = (remaining > UnsafeHelper.MEM_COPY_THRESHOLD) ? UnsafeHelper.MEM_COPY_THRESHOLD : remaining;
UnsafeHelper.UNSAFE.copyMemory(data, UnsafeHelper.BYTE_ARRAY_BASE_OFFSET + pos, dest, offset, chunk);
remaining -= chunk;
offset += chunk;
pos += chunk;
}
}
@Override
public ByteOrder getByteOrder() {
return ByteOrder.nativeOrder();
}
@Override
public String toString() {
return "UnsafeObjectDataInput{"
+ "size=" + size
+ ", pos=" + pos
+ ", mark=" + mark
+ ", byteOrder=" + getByteOrder()
+ '}';
}
}
