/*
* Copyright (c) 2008-2017, 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.InternalSerializationService;
import com.hazelcast.nio.Bits;
import com.hazelcast.nio.BufferObjectDataInput;
import com.hazelcast.nio.serialization.Data;
import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteOrder;
import static com.hazelcast.nio.Bits.CHAR_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 ByteArrayObjectDataInput extends VersionedObjectDataInput implements BufferObjectDataInput {
private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
byte[] data;
int size;
int pos;
int mark;
final InternalSerializationService service;
char[] charBuffer;
private final boolean bigEndian;
ByteArrayObjectDataInput(byte[] data, InternalSerializationService service, ByteOrder byteOrder) {
this(data, 0, service, byteOrder);
}
ByteArrayObjectDataInput(byte[] data, int offset, InternalSerializationService service, ByteOrder byteOrder) {
this.data = data;
this.size = data != null ? data.length : 0;
this.service = service;
this.pos = offset;
this.bigEndian = byteOrder == ByteOrder.BIG_ENDIAN;
}
@Override
public void init(byte[] data, int offset) {
this.data = data;
this.size = data != null ? data.length : 0;
this.pos = offset;
}
@Override
public void clear() {
this.data = null;
this.pos = 0;
this.size = 0;
this.mark = 0;
if (charBuffer != null && charBuffer.length > UTF_BUFFER_SIZE * 8) {
this.charBuffer = new char[UTF_BUFFER_SIZE * 8];
}
}
@Override
public int read() throws EOFException {
return (pos < size) ? (data[pos++] & 0xff) : -1;
}
@Override
public int read(int position) throws EOFException {
return (position < size) ? (data[position] & 0xff) : -1;
}
@Override
public final int read(byte[] b, int off, int len) throws EOFException {
if (b == null) {
throw new NullPointerException();
} else if (off < 0 || len < 0 || len > b.length - off) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return 0;
}
if (pos >= size) {
return -1;
}
if (pos + len > size) {
len = size - pos;
}
System.arraycopy(data, pos, b, off, len);
pos += len;
return len;
}
@Override
public final boolean readBoolean() throws EOFException {
final int ch = read();
if (ch < 0) {
throw new EOFException();
}
return (ch != 0);
}
@Override
public final boolean readBoolean(int position) throws EOFException {
final int ch = read(position);
if (ch < 0) {
throw new EOFException();
}
return (ch != 0);
}
/**
* See the general contract of the <code>readByte</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next byte of this input stream as a signed 8-bit
* <code>byte</code>.
* @throws java.io.EOFException if this input stream has reached the end.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
@Override
public final byte readByte() throws EOFException {
final int ch = read();
if (ch < 0) {
throw new EOFException();
}
return (byte) (ch);
}
@Override
public final byte readByte(int position) throws EOFException {
final int ch = read(position);
if (ch < 0) {
throw new EOFException();
}
return (byte) (ch);
}
/**
* See the general contract of the <code>readChar</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next two bytes of this input stream as a Unicode character.
* @throws java.io.EOFException if this input stream reaches the end before reading two
* bytes.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
@Override
public final char readChar() throws EOFException {
final char c = readChar(pos);
pos += CHAR_SIZE_IN_BYTES;
return c;
}
@Override
public char readChar(int position) throws EOFException {
checkAvailable(position, CHAR_SIZE_IN_BYTES);
return Bits.readChar(data, position, bigEndian);
}
/**
* See the general contract of the <code>readDouble</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next eight bytes of this input stream, interpreted as a
* <code>double</code>.
* @throws java.io.EOFException if this input stream reaches the end before reading eight
* bytes.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.DataInputStream#readLong()
* @see Double#longBitsToDouble(long)
*/
@Override
public double readDouble() throws EOFException {
return Double.longBitsToDouble(readLong());
}
@Override
public double readDouble(int position) throws EOFException {
return Double.longBitsToDouble(readLong(position));
}
@Override
public double readDouble(ByteOrder byteOrder) throws EOFException {
return Double.longBitsToDouble(readLong(byteOrder));
}
@Override
public double readDouble(int position, ByteOrder byteOrder) throws EOFException {
return Double.longBitsToDouble(readLong(position, byteOrder));
}
/**
* See the general contract of the <code>readFloat</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next four bytes of this input stream, interpreted as a
* <code>float</code>.
* @throws java.io.EOFException if this input stream reaches the end before reading four
* bytes.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.DataInputStream#readInt()
* @see Float#intBitsToFloat(int)
*/
@Override
public float readFloat() throws EOFException {
return Float.intBitsToFloat(readInt());
}
@Override
public float readFloat(int position) throws EOFException {
return Float.intBitsToFloat(readInt(position));
}
@Override
public float readFloat(ByteOrder byteOrder) throws EOFException {
return Float.intBitsToFloat(readInt(byteOrder));
}
@Override
public float readFloat(int position, ByteOrder byteOrder) throws EOFException {
return Float.intBitsToFloat(readInt(position, byteOrder));
}
@Override
public void readFully(final byte[] b) throws IOException {
if (read(b) == -1) {
throw new EOFException("End of stream reached");
}
}
@Override
public void readFully(final byte[] b, final int off, final int len) throws EOFException {
if (read(b, off, len) == -1) {
throw new EOFException("End of stream reached");
}
}
/**
* See the general contract of the <code>readInt</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next four bytes of this input stream, interpreted as an
* <code>int</code>.
* @throws java.io.EOFException if this input stream reaches the end before reading four
* bytes.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
@Override
public final int readInt() throws EOFException {
final int i = readInt(pos);
pos += INT_SIZE_IN_BYTES;
return i;
}
public int readInt(int position) throws EOFException {
checkAvailable(position, INT_SIZE_IN_BYTES);
return Bits.readInt(data, position, bigEndian);
}
@Override
public final int readInt(ByteOrder byteOrder) throws EOFException {
final int i = readInt(pos, byteOrder);
pos += INT_SIZE_IN_BYTES;
return i;
}
@Override
public int readInt(int position, ByteOrder byteOrder) throws EOFException {
checkAvailable(position, INT_SIZE_IN_BYTES);
return Bits.readInt(data, position, byteOrder == ByteOrder.BIG_ENDIAN);
}
@Deprecated
public final String readLine() throws EOFException {
throw new UnsupportedOperationException();
}
/**
* See the general contract of the <code>readLong</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next eight bytes of this input stream, interpreted as a
* <code>long</code>.
* @throws java.io.EOFException if this input stream reaches the end before reading eight
* bytes.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
@Override
public final long readLong() throws EOFException {
final long l = readLong(pos);
pos += LONG_SIZE_IN_BYTES;
return l;
}
public long readLong(int position) throws EOFException {
checkAvailable(position, LONG_SIZE_IN_BYTES);
return Bits.readLong(data, position, bigEndian);
}
@Override
public final long readLong(ByteOrder byteOrder) throws EOFException {
final long l = readLong(pos, byteOrder);
pos += LONG_SIZE_IN_BYTES;
return l;
}
@Override
public long readLong(int position, ByteOrder byteOrder) throws EOFException {
checkAvailable(position, LONG_SIZE_IN_BYTES);
return Bits.readLong(data, position, byteOrder == ByteOrder.BIG_ENDIAN);
}
/**
* See the general contract of the <code>readShort</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next two bytes of this input stream, interpreted as a signed
* 16-bit number.
* @throws java.io.EOFException if this input stream reaches the end before reading two
* bytes.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
@Override
public final short readShort() throws EOFException {
short s = readShort(pos);
pos += SHORT_SIZE_IN_BYTES;
return s;
}
@Override
public short readShort(int position) throws EOFException {
checkAvailable(position, SHORT_SIZE_IN_BYTES);
return Bits.readShort(data, position, bigEndian);
}
@Override
public final short readShort(ByteOrder byteOrder) throws EOFException {
short s = readShort(pos, byteOrder);
pos += SHORT_SIZE_IN_BYTES;
return s;
}
@Override
public short readShort(int position, ByteOrder byteOrder) throws EOFException {
checkAvailable(position, SHORT_SIZE_IN_BYTES);
return Bits.readShort(data, position, byteOrder == ByteOrder.BIG_ENDIAN);
}
@Override
public byte[] readByteArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
byte[] b = new byte[len];
readFully(b);
return b;
}
return EMPTY_BYTE_ARRAY;
}
@Override
public boolean[] readBooleanArray() throws EOFException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
boolean[] values = new boolean[len];
for (int i = 0; i < len; i++) {
values[i] = readBoolean();
}
return values;
}
return new boolean[0];
}
@Override
public char[] readCharArray() throws EOFException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
char[] values = new char[len];
for (int i = 0; i < len; i++) {
values[i] = readChar();
}
return values;
}
return new char[0];
}
@Override
public int[] readIntArray() throws EOFException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
int[] values = new int[len];
for (int i = 0; i < len; i++) {
values[i] = readInt();
}
return values;
}
return new int[0];
}
@Override
public long[] readLongArray() throws EOFException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
long[] values = new long[len];
for (int i = 0; i < len; i++) {
values[i] = readLong();
}
return values;
}
return new long[0];
}
@Override
public double[] readDoubleArray() throws EOFException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
double[] values = new double[len];
for (int i = 0; i < len; i++) {
values[i] = readDouble();
}
return values;
}
return new double[0];
}
@Override
public float[] readFloatArray() throws EOFException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
float[] values = new float[len];
for (int i = 0; i < len; i++) {
values[i] = readFloat();
}
return values;
}
return new float[0];
}
@Override
public short[] readShortArray() throws EOFException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
short[] values = new short[len];
for (int i = 0; i < len; i++) {
values[i] = readShort();
}
return values;
}
return new short[0];
}
@Override
public String[] readUTFArray() throws IOException {
int len = readInt();
if (len == NULL_ARRAY_LENGTH) {
return null;
}
if (len > 0) {
String[] values = new String[len];
for (int i = 0; i < len; i++) {
values[i] = readUTF();
}
return values;
}
return new String[0];
}
/**
* See the general contract of the <code>readUnsignedByte</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next byte of this input stream, interpreted as an unsigned
* 8-bit number.
* @throws java.io.EOFException if this input stream has reached the end.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
@Override
public int readUnsignedByte() throws EOFException {
return readByte() & 0xFF;
}
/**
* See the general contract of the <code>readUnsignedShort</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return the next two bytes of this input stream, interpreted as an
* unsigned 16-bit integer.
* @throws java.io.EOFException if this input stream reaches the end before reading two
* bytes.
* @throws java.io.IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
@Override
public int readUnsignedShort() throws EOFException {
return readShort() & 0xffff;
}
/**
* See the general contract of the <code>readUTF</code> method of
* <code>DataInput</code>.
* <p/>
* Bytes for this operation are read from the contained input stream.
*
* @return a Unicode string.
* @throws java.io.EOFException if this input stream reaches the end before reading all
* the bytes.
* @throws java.io.IOException if an I/O error occurs.
* @throws java.io.UTFDataFormatException if the bytes do not represent a valid modified UTF-8
* encoding of a string.
* @see java.io.DataInputStream#readUTF(java.io.DataInput)
*/
@Override
public final String readUTF() throws IOException {
int charCount = readInt();
if (charCount == NULL_ARRAY_LENGTH) {
return null;
}
if (charBuffer == null || charCount > charBuffer.length) {
charBuffer = new char[charCount];
}
byte b;
for (int i = 0; i < charCount; i++) {
b = readByte();
if (b < 0) {
charBuffer[i] = Bits.readUtf8Char(this, b);
} else {
charBuffer[i] = (char) b;
}
}
return new String(charBuffer, 0, charCount);
}
@Override
public final Object readObject() throws EOFException {
return service.readObject(this);
}
@Override
public <T> T readObject(Class aClass)
throws IOException {
return service.readObject(this, aClass);
}
@Override
public <T> T readDataAsObject() throws IOException {
// a future optimization would be to skip the construction of the Data object.
Data data = readData();
return data == null ? null : (T) service.toObject(data);
}
@Override
public final Data readData() throws IOException {
byte[] bytes = readByteArray();
return bytes == null ? null : new HeapData(bytes);
}
@Override
public final long skip(long n) {
if (n <= 0 || n >= Integer.MAX_VALUE) {
return 0L;
}
return skipBytes((int) n);
}
@Override
public final int skipBytes(final int n) {
if (n <= 0) {
return 0;
}
int skip = n;
final int pos = position();
if (pos + skip > size) {
skip = size - pos;
}
position(pos + skip);
return skip;
}
/**
* Returns this buffer's position.
*/
@Override
public final int position() {
return pos;
}
@Override
public final void position(int newPos) {
if ((newPos > size) || (newPos < 0)) {
throw new IllegalArgumentException();
}
pos = newPos;
if (mark > pos) {
mark = -1;
}
}
final void checkAvailable(int pos, int k) throws EOFException {
if (pos < 0) {
throw new IllegalArgumentException("Negative pos! -> " + pos);
}
if ((size - pos) < k) {
throw new EOFException("Cannot read " + k + " bytes!");
}
}
@Override
public final int available() {
return size - pos;
}
@Override
public final boolean markSupported() {
return true;
}
@Override
public final void mark(int readlimit) {
mark = pos;
}
@Override
public final void reset() {
pos = mark;
}
@Override
public final void close() {
data = null;
charBuffer = null;
}
@Override
public final ClassLoader getClassLoader() {
return service.getClassLoader();
}
public ByteOrder getByteOrder() {
return bigEndian ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
}
@Override
public String toString() {
return "ByteArrayObjectDataInput{"
+ "size=" + size
+ ", pos=" + pos
+ ", mark=" + mark
+ '}';
}
}