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org.jboss.marshalling.AbstractMarshaller Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source
* Copyright 2008, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.marshalling;
import java.io.IOException;
import java.io.NotActiveException;
/**
* An abstract implementation of the {@code Marshaller} interface. Most of the
* write methods delegate directly to the current data output.
*/
public abstract class AbstractMarshaller implements Marshaller {
/** The configured class externalizer factory. */
protected final ClassExternalizerFactory classExternalizerFactory;
/** The configured stream header. */
protected final StreamHeader streamHeader;
/** The configured class resolver. */
protected final ClassResolver classResolver;
/** The configured object resolver. */
protected final ObjectResolver objectResolver;
/** The configured object creator. */
protected final Creator creator;
/** The configured class table. */
protected final ClassTable classTable;
/** The configured object table. */
protected final ObjectTable objectTable;
/** The configured version to write. */
protected final int configuredVersion;
/** The current byte output. */
protected ByteOutput byteOutput;
/**
* Construct a new marshaller instance.
*
* @param marshallerFactory the marshaller factory
* @param configuration
*/
protected AbstractMarshaller(final AbstractMarshallerFactory marshallerFactory, final MarshallingConfiguration configuration) {
final ClassExternalizerFactory classExternalizerFactory = configuration.getClassExternalizerFactory();
this.classExternalizerFactory = classExternalizerFactory == null ? marshallerFactory.getDefaultClassExternalizerFactory() : classExternalizerFactory;
final StreamHeader streamHeader = configuration.getStreamHeader();
this.streamHeader = streamHeader == null ? marshallerFactory.getDefaultStreamHeader() : streamHeader;
final ClassResolver classResolver = configuration.getClassResolver();
this.classResolver = classResolver == null ? marshallerFactory.getDefaultClassResolver() : classResolver;
final ObjectResolver objectResolver = configuration.getObjectResolver();
this.objectResolver = objectResolver == null ? marshallerFactory.getDefaultObjectResolver() : objectResolver;
final Creator creator = configuration.getCreator();
this.creator = creator == null ? marshallerFactory.getDefaultCreator() : creator;
final ClassTable classTable = configuration.getClassTable();
this.classTable = classTable == null ? marshallerFactory.getDefaultClassTable() : classTable;
final ObjectTable objectTable = configuration.getObjectTable();
this.objectTable = objectTable == null ? marshallerFactory.getDefaultObjectTable() : objectTable;
final int configuredVersion = configuration.getVersion();
this.configuredVersion = configuredVersion == -1 ? marshallerFactory.getDefaultVersion() : configuredVersion;
final int minBufSize = marshallerFactory.getMinimumBufferSize();
final int bufferSize = configuration.getBufferSize();
this.bufferSize = bufferSize == -1 ? marshallerFactory.getDefaultBufferSize() : bufferSize < minBufSize ? minBufSize : bufferSize;
}
private static NotActiveException notActiveException() {
return new NotActiveException("Output not started");
}
protected final int bufferSize;
private byte[] buffer;
private int position;
/** {@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();
}
}
/** {@inheritDoc} */
public void close() throws IOException {
finish();
}
/** {@inheritDoc} */
public void start(final ByteOutput byteOutput) throws IOException {
this.byteOutput = byteOutput;
buffer = new byte[bufferSize];
doStart();
}
/** {@inheritDoc} */
public void finish() throws IOException {
try {
flush();
} finally {
buffer = null;
byteOutput = null;
clearClassCache();
}
}
/**
* Implementation of the actual object-writing method.
*
* @param obj the object to write
* @param unshared {@code true} if the instance is unshared, {@code false} if it is shared
* @throws IOException if an I/O error occurs
*/
protected abstract void doWriteObject(Object obj, boolean unshared) throws IOException;
/** {@inheritDoc} */
public final void writeObjectUnshared(final Object obj) throws IOException {
doWriteObject(obj, true);
}
/** {@inheritDoc} */
public final void writeObject(final Object obj) throws IOException {
doWriteObject(obj, false);
}
/**
* Perform any marshaller-specific start activity. This implementation simply writes the stream header.
*
* @throws IOException if I/O exception occurs
*/
protected void doStart() throws IOException {
streamHeader.writeHeader(this);
}
}
