org.jboss.marshalling.SimpleDataOutput Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 org.jboss.marshalling;
import java.io.DataOutput;
import java.io.IOException;
import java.io.NotActiveException;
/**
* A simple base implementation of {@link DataOutput} which wraps a {@link ByteOutput}. This implementation maintains
* an internal buffer.
*/
public class SimpleDataOutput extends ByteOutputStream implements DataOutput {
/**
* The size of the internal buffer.
*/
protected final int bufferSize;
/**
* The internal buffer.
*/
protected byte[] buffer;
/**
* The position in the buffer.
*/
private int position;
/**
* Construct a new instance.
*
* @param bufferSize the buffer size
*/
public SimpleDataOutput(final int bufferSize) {
this(bufferSize, null);
}
/**
* Construct a new instance.
*
* @param bufferSize the buffer size
* @param byteOutput the byte output to wrap
*/
public SimpleDataOutput(final int bufferSize, final ByteOutput byteOutput) {
super(byteOutput);
this.byteOutput = byteOutput;
this.bufferSize = bufferSize;
buffer = new byte[bufferSize];
}
/**
* Construct a new instance with a default buffer size.
*
* @param byteOutput the byte output to wrap
*/
public SimpleDataOutput(final ByteOutput byteOutput) {
this(8192, byteOutput);
}
private static NotActiveException notActiveException() {
return new NotActiveException("Output not started");
}
/** {@inheritDoc} */
public void write(final int v) throws IOException {
try {
final byte[] buffer = this.buffer;
final int position = this.position;
if (position == buffer.length) {
flush();
buffer[0] = (byte) v;
this.position = 1;
} else {
buffer[position] = (byte) v;
this.position = position + 1;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void write(final byte[] bytes) throws IOException {
write(bytes, 0, bytes.length);
}
/** {@inheritDoc} */
public void write(final byte[] bytes, final int off, int len) throws IOException {
final int bl = buffer.length;
final int position = this.position;
if (len > bl - position || len > bl >> 3) {
flush();
byteOutput.write(bytes, off, len);
} else {
System.arraycopy(bytes, off, buffer, position, len);
this.position = position + len;
}
}
/** {@inheritDoc} */
public void writeBoolean(final boolean v) throws IOException {
try {
final byte[] buffer = this.buffer;
final int remaining = buffer.length - position;
if (remaining == 0) {
flush();
buffer[0] = (byte) (v ? 1 : 0);
position = 1;
} else {
buffer[position++] = (byte) (v ? 1 : 0);
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeByte(final int v) throws IOException {
try {
final byte[] buffer = this.buffer;
final int remaining = buffer.length - position;
if (remaining == 0) {
flush();
buffer[0] = (byte) v;
position = 1;
} else {
buffer[position++] = (byte) v;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeShort(final int v) throws IOException {
try {
final byte[] buffer = this.buffer;
final int remaining = buffer.length - position;
if (remaining < 2) {
flush();
buffer[0] = (byte) (v >> 8);
buffer[1] = (byte) v;
position = 2;
} else {
final int s = position;
position = s + 2;
buffer[s] = (byte) (v >> 8);
buffer[s+1] = (byte) v;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeChar(final int v) throws IOException {
try {
final byte[] buffer = this.buffer;
final int remaining = buffer.length - position;
if (remaining < 2) {
flush();
buffer[0] = (byte) (v >> 8);
buffer[1] = (byte) v;
position = 2;
} else {
final int s = position;
position = s + 2;
buffer[s] = (byte) (v >> 8);
buffer[s+1] = (byte) v;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeInt(final int v) throws IOException {
try {
final byte[] buffer = this.buffer;
final int remaining = buffer.length - position;
if (remaining < 4) {
flush();
buffer[0] = (byte) (v >> 24);
buffer[1] = (byte) (v >> 16);
buffer[2] = (byte) (v >> 8);
buffer[3] = (byte) v;
position = 4;
} else {
final int s = position;
position = s + 4;
buffer[s] = (byte) (v >> 24);
buffer[s+1] = (byte) (v >> 16);
buffer[s+2] = (byte) (v >> 8);
buffer[s+3] = (byte) v;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeLong(final long v) throws IOException {
try {
final byte[] buffer = this.buffer;
final int remaining = buffer.length - position;
if (remaining < 8) {
flush();
buffer[0] = (byte) (v >> 56L);
buffer[1] = (byte) (v >> 48L);
buffer[2] = (byte) (v >> 40L);
buffer[3] = (byte) (v >> 32L);
buffer[4] = (byte) (v >> 24L);
buffer[5] = (byte) (v >> 16L);
buffer[6] = (byte) (v >> 8L);
buffer[7] = (byte) v;
position = 8;
} else {
final int s = position;
position = s + 8;
buffer[s] = (byte) (v >> 56L);
buffer[s+1] = (byte) (v >> 48L);
buffer[s+2] = (byte) (v >> 40L);
buffer[s+3] = (byte) (v >> 32L);
buffer[s+4] = (byte) (v >> 24L);
buffer[s+5] = (byte) (v >> 16L);
buffer[s+6] = (byte) (v >> 8L);
buffer[s+7] = (byte) v;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeFloat(final float v) throws IOException {
final int bits = Float.floatToIntBits(v);
try {
final byte[] buffer = this.buffer;
final int remaining = buffer.length - position;
if (remaining < 4) {
flush();
buffer[0] = (byte) (bits >> 24);
buffer[1] = (byte) (bits >> 16);
buffer[2] = (byte) (bits >> 8);
buffer[3] = (byte) bits;
position = 4;
} else {
final int s = position;
position = s + 4;
buffer[s] = (byte) (bits >> 24);
buffer[s+1] = (byte) (bits >> 16);
buffer[s+2] = (byte) (bits >> 8);
buffer[s+3] = (byte) bits;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeDouble(final double v) throws IOException {
final long bits = Double.doubleToLongBits(v);
try {
final int remaining = buffer.length - position;
if (remaining < 8) {
flush();
buffer[0] = (byte) (bits >> 56L);
buffer[1] = (byte) (bits >> 48L);
buffer[2] = (byte) (bits >> 40L);
buffer[3] = (byte) (bits >> 32L);
buffer[4] = (byte) (bits >> 24L);
buffer[5] = (byte) (bits >> 16L);
buffer[6] = (byte) (bits >> 8L);
buffer[7] = (byte) bits;
position = 8;
} else {
final int s = position;
position = s + 8;
buffer[s] = (byte) (bits >> 56L);
buffer[s+1] = (byte) (bits >> 48L);
buffer[s+2] = (byte) (bits >> 40L);
buffer[s+3] = (byte) (bits >> 32L);
buffer[s+4] = (byte) (bits >> 24L);
buffer[s+5] = (byte) (bits >> 16L);
buffer[s+6] = (byte) (bits >> 8L);
buffer[s+7] = (byte) bits;
}
} catch (NullPointerException e) {
throw notActiveException();
}
}
/** {@inheritDoc} */
public void writeBytes(final String s) throws IOException {
final int len = s.length();
for (int i = 0; i < len; i ++) {
write(s.charAt(i));
}
}
/** {@inheritDoc} */
public void writeChars(final String s) throws IOException {
final int len = s.length();
for (int i = 0; i < len; i ++) {
writeChar(s.charAt(i));
}
}
/** {@inheritDoc} */
public void writeUTF(final String s) throws IOException {
writeShort(UTFUtils.getShortUTFLength(s));
UTFUtils.writeUTFBytes(this, s);
}
/** {@inheritDoc} */
public void flush() throws IOException {
final int pos = position;
final ByteOutput byteOutput = this.byteOutput;
if (byteOutput != null) {
if (pos > 0) {
byteOutput.write(buffer, 0, pos);
}
position = 0;
byteOutput.flush();
}
}
/**
* This shallow flush will write the internal buffer out to the {@code ByteOutput}, but will not flush it.
*
* @throws java.io.IOException if an I/O error occurs
*/
protected void shallowFlush() throws IOException {
final int pos = position;
final ByteOutput byteOutput = this.byteOutput;
if (byteOutput != null) {
if (pos > 0) {
byteOutput.write(buffer, 0, pos);
}
position = 0;
}
}
/**
* Begin writing to a stream.
*
* @param byteOutput the new stream
* @throws IOException if an error occurs
*/
protected void start(ByteOutput byteOutput) throws IOException {
this.byteOutput = byteOutput;
buffer = new byte[bufferSize];
}
/**
* Finish writing to a stream. The stream is released.
* No further writing may be done until the {@link #start(ByteOutput)} method is again invoked.
*
* @throws IOException if an error occurs
*/
protected void finish() throws IOException {
try {
flush();
} finally {
buffer = null;
byteOutput = null;
}
}
/**
* {@inheritDoc}
*/
public void close() throws IOException {
flush();
byteOutput.close();
}
}