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The ActiveMQ Client implementation
/**
* 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.activemq.openwire.v1;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.lang.reflect.Constructor;
import org.apache.activemq.command.DataStructure;
import org.apache.activemq.openwire.BooleanStream;
import org.apache.activemq.openwire.DataStreamMarshaller;
import org.apache.activemq.openwire.OpenWireFormat;
import org.apache.activemq.openwire.OpenWireUtil;
import org.apache.activemq.util.ByteSequence;
public abstract class BaseDataStreamMarshaller implements DataStreamMarshaller {
public static final Constructor STACK_TRACE_ELEMENT_CONSTRUCTOR;
private static final int MAX_EXCEPTION_MESSAGE_SIZE = 1024;
static {
Constructor constructor = null;
try {
constructor = StackTraceElement.class.getConstructor(new Class[] {String.class, String.class,
String.class, int.class});
} catch (Throwable e) {
}
STACK_TRACE_ELEMENT_CONSTRUCTOR = constructor;
}
public abstract byte getDataStructureType();
public abstract DataStructure createObject();
public int tightMarshal1(OpenWireFormat wireFormat, Object o, BooleanStream bs) throws IOException {
return 0;
}
public void tightMarshal2(OpenWireFormat wireFormat, Object o, DataOutput dataOut, BooleanStream bs)
throws IOException {
}
public void tightUnmarshal(OpenWireFormat wireFormat, Object o, DataInput dataIn, BooleanStream bs)
throws IOException {
}
public int tightMarshalLong1(OpenWireFormat wireFormat, long o, BooleanStream bs) throws IOException {
if (o == 0) {
bs.writeBoolean(false);
bs.writeBoolean(false);
return 0;
} else if ((o & 0xFFFFFFFFFFFF0000L) == 0) {
bs.writeBoolean(false);
bs.writeBoolean(true);
return 2;
} else if ((o & 0xFFFFFFFF00000000L) == 0) {
bs.writeBoolean(true);
bs.writeBoolean(false);
return 4;
} else {
bs.writeBoolean(true);
bs.writeBoolean(true);
return 8;
}
}
public void tightMarshalLong2(OpenWireFormat wireFormat, long o, DataOutput dataOut, BooleanStream bs)
throws IOException {
if (bs.readBoolean()) {
if (bs.readBoolean()) {
dataOut.writeLong(o);
} else {
dataOut.writeInt((int)o);
}
} else {
if (bs.readBoolean()) {
dataOut.writeShort((int)o);
}
}
}
public long tightUnmarshalLong(OpenWireFormat wireFormat, DataInput dataIn, BooleanStream bs)
throws IOException {
if (bs.readBoolean()) {
if (bs.readBoolean()) {
return dataIn.readLong();
} else {
return toLong(dataIn.readInt());
}
} else {
if (bs.readBoolean()) {
return toLong(dataIn.readShort());
} else {
return 0;
}
}
}
protected long toLong(short value) {
// lets handle negative values
long answer = value;
return answer & 0xffffL;
}
protected long toLong(int value) {
// lets handle negative values
long answer = value;
return answer & 0xffffffffL;
}
protected DataStructure tightUnmarsalNestedObject(OpenWireFormat wireFormat, DataInput dataIn,
BooleanStream bs) throws IOException {
return wireFormat.tightUnmarshalNestedObject(dataIn, bs);
}
protected int tightMarshalNestedObject1(OpenWireFormat wireFormat, DataStructure o, BooleanStream bs)
throws IOException {
return wireFormat.tightMarshalNestedObject1(o, bs);
}
protected void tightMarshalNestedObject2(OpenWireFormat wireFormat, DataStructure o, DataOutput dataOut,
BooleanStream bs) throws IOException {
wireFormat.tightMarshalNestedObject2(o, dataOut, bs);
}
protected DataStructure tightUnmarsalCachedObject(OpenWireFormat wireFormat, DataInput dataIn,
BooleanStream bs) throws IOException {
if (wireFormat.isCacheEnabled()) {
if (bs.readBoolean()) {
short index = dataIn.readShort();
DataStructure object = wireFormat.tightUnmarshalNestedObject(dataIn, bs);
wireFormat.setInUnmarshallCache(index, object);
return object;
} else {
short index = dataIn.readShort();
return wireFormat.getFromUnmarshallCache(index);
}
} else {
return wireFormat.tightUnmarshalNestedObject(dataIn, bs);
}
}
protected int tightMarshalCachedObject1(OpenWireFormat wireFormat, DataStructure o, BooleanStream bs)
throws IOException {
if (wireFormat.isCacheEnabled()) {
Short index = wireFormat.getMarshallCacheIndex(o);
bs.writeBoolean(index == null);
if (index == null) {
int rc = wireFormat.tightMarshalNestedObject1(o, bs);
wireFormat.addToMarshallCache(o);
return 2 + rc;
} else {
return 2;
}
} else {
return wireFormat.tightMarshalNestedObject1(o, bs);
}
}
protected void tightMarshalCachedObject2(OpenWireFormat wireFormat, DataStructure o, DataOutput dataOut,
BooleanStream bs) throws IOException {
if (wireFormat.isCacheEnabled()) {
Short index = wireFormat.getMarshallCacheIndex(o);
if (bs.readBoolean()) {
dataOut.writeShort(index);
wireFormat.tightMarshalNestedObject2(o, dataOut, bs);
} else {
dataOut.writeShort(index);
}
} else {
wireFormat.tightMarshalNestedObject2(o, dataOut, bs);
}
}
protected Throwable tightUnmarsalThrowable(OpenWireFormat wireFormat, DataInput dataIn, BooleanStream bs)
throws IOException {
if (bs.readBoolean()) {
String clazz = tightUnmarshalString(dataIn, bs);
String message = tightUnmarshalString(dataIn, bs);
Throwable o = createThrowable(clazz, message);
if (wireFormat.isStackTraceEnabled()) {
if (STACK_TRACE_ELEMENT_CONSTRUCTOR != null) {
StackTraceElement ss[] = new StackTraceElement[dataIn.readShort()];
for (int i = 0; i < ss.length; i++) {
try {
ss[i] = (StackTraceElement)STACK_TRACE_ELEMENT_CONSTRUCTOR
.newInstance(new Object[] {tightUnmarshalString(dataIn, bs),
tightUnmarshalString(dataIn, bs),
tightUnmarshalString(dataIn, bs),
dataIn.readInt()});
} catch (IOException e) {
throw e;
} catch (Throwable e) {
}
}
o.setStackTrace(ss);
} else {
short size = dataIn.readShort();
for (int i = 0; i < size; i++) {
tightUnmarshalString(dataIn, bs);
tightUnmarshalString(dataIn, bs);
tightUnmarshalString(dataIn, bs);
dataIn.readInt();
}
}
o.initCause(tightUnmarsalThrowable(wireFormat, dataIn, bs));
}
return o;
} else {
return null;
}
}
private Throwable createThrowable(String className, String message) {
try {
Class clazz = Class.forName(className, false, BaseDataStreamMarshaller.class.getClassLoader());
OpenWireUtil.validateIsThrowable(clazz);
Constructor constructor = clazz.getConstructor(new Class[] {String.class});
return (Throwable)constructor.newInstance(new Object[] {message});
} catch (IllegalArgumentException e) {
return e;
} catch (Throwable e) {
return new Throwable(className + ": " + message);
}
}
protected int tightMarshalThrowable1(OpenWireFormat wireFormat, Throwable o, BooleanStream bs)
throws IOException {
if (o == null) {
bs.writeBoolean(false);
return 0;
} else {
int rc = 0;
bs.writeBoolean(true);
rc += tightMarshalString1(o.getClass().getName(), bs);
rc += tightMarshalString1(cutMessageIfNeeded(o.getMessage()), bs);
if (wireFormat.isStackTraceEnabled()) {
rc += 2;
StackTraceElement[] stackTrace = o.getStackTrace();
for (int i = 0; i < stackTrace.length; i++) {
StackTraceElement element = stackTrace[i];
rc += tightMarshalString1(element.getClassName(), bs);
rc += tightMarshalString1(element.getMethodName(), bs);
rc += tightMarshalString1(element.getFileName(), bs);
rc += 4;
}
rc += tightMarshalThrowable1(wireFormat, o.getCause(), bs);
}
return rc;
}
}
protected void tightMarshalThrowable2(OpenWireFormat wireFormat, Throwable o, DataOutput dataOut,
BooleanStream bs) throws IOException {
if (bs.readBoolean()) {
tightMarshalString2(o.getClass().getName(), dataOut, bs);
tightMarshalString2(cutMessageIfNeeded(o.getMessage()), dataOut, bs);
if (wireFormat.isStackTraceEnabled()) {
StackTraceElement[] stackTrace = o.getStackTrace();
dataOut.writeShort(stackTrace.length);
for (int i = 0; i < stackTrace.length; i++) {
StackTraceElement element = stackTrace[i];
tightMarshalString2(element.getClassName(), dataOut, bs);
tightMarshalString2(element.getMethodName(), dataOut, bs);
tightMarshalString2(element.getFileName(), dataOut, bs);
dataOut.writeInt(element.getLineNumber());
}
tightMarshalThrowable2(wireFormat, o.getCause(), dataOut, bs);
}
}
}
@SuppressWarnings("deprecation")
protected String tightUnmarshalString(DataInput dataIn, BooleanStream bs) throws IOException {
if (bs.readBoolean()) {
if (bs.readBoolean()) {
int size = dataIn.readShort();
byte data[] = new byte[size];
dataIn.readFully(data);
// Yes deprecated, but we know what we are doing.
// This allows us to create a String from a ASCII byte array. (no UTF-8 decoding)
return new String(data, 0);
} else {
return dataIn.readUTF();
}
} else {
return null;
}
}
protected int tightMarshalString1(String value, BooleanStream bs) throws IOException {
bs.writeBoolean(value != null);
if (value != null) {
int strlen = value.length();
int utflen = 0;
char[] charr = new char[strlen];
int c = 0;
boolean isOnlyAscii = true;
value.getChars(0, strlen, charr, 0);
for (int i = 0; i < strlen; i++) {
c = charr[i];
if ((c >= 0x0001) && (c <= 0x007F)) {
utflen++;
} else if (c > 0x07FF) {
utflen += 3;
isOnlyAscii = false;
} else {
isOnlyAscii = false;
utflen += 2;
}
}
if (utflen >= Short.MAX_VALUE) {
throw new IOException("Encountered a String value that is too long to encode.");
}
bs.writeBoolean(isOnlyAscii);
return utflen + 2;
} else {
return 0;
}
}
protected void tightMarshalString2(String value, DataOutput dataOut, BooleanStream bs) throws IOException {
if (bs.readBoolean()) {
// If we verified it only holds ascii values
if (bs.readBoolean()) {
dataOut.writeShort(value.length());
dataOut.writeBytes(value);
} else {
dataOut.writeUTF(value);
}
}
}
protected int tightMarshalObjectArray1(OpenWireFormat wireFormat, DataStructure[] objects,
BooleanStream bs) throws IOException {
if (objects != null) {
int rc = 0;
bs.writeBoolean(true);
rc += 2;
for (int i = 0; i < objects.length; i++) {
rc += tightMarshalNestedObject1(wireFormat, objects[i], bs);
}
return rc;
} else {
bs.writeBoolean(false);
return 0;
}
}
protected void tightMarshalObjectArray2(OpenWireFormat wireFormat, DataStructure[] objects,
DataOutput dataOut, BooleanStream bs) throws IOException {
if (bs.readBoolean()) {
dataOut.writeShort(objects.length);
for (int i = 0; i < objects.length; i++) {
tightMarshalNestedObject2(wireFormat, objects[i], dataOut, bs);
}
}
}
protected int tightMarshalConstByteArray1(byte[] data, BooleanStream bs, int i) throws IOException {
return i;
}
protected void tightMarshalConstByteArray2(byte[] data, DataOutput dataOut, BooleanStream bs, int i)
throws IOException {
dataOut.write(data, 0, i);
}
protected byte[] tightUnmarshalConstByteArray(DataInput dataIn, BooleanStream bs, int i)
throws IOException {
byte data[] = new byte[i];
dataIn.readFully(data);
return data;
}
protected int tightMarshalByteArray1(byte[] data, BooleanStream bs) throws IOException {
bs.writeBoolean(data != null);
if (data != null) {
return data.length + 4;
} else {
return 0;
}
}
protected void tightMarshalByteArray2(byte[] data, DataOutput dataOut, BooleanStream bs)
throws IOException {
if (bs.readBoolean()) {
dataOut.writeInt(data.length);
dataOut.write(data);
}
}
protected byte[] tightUnmarshalByteArray(DataInput dataIn, BooleanStream bs) throws IOException {
byte rc[] = null;
if (bs.readBoolean()) {
int size = dataIn.readInt();
rc = new byte[size];
dataIn.readFully(rc);
}
return rc;
}
protected int tightMarshalByteSequence1(ByteSequence data, BooleanStream bs) throws IOException {
bs.writeBoolean(data != null);
if (data != null) {
return data.getLength() + 4;
} else {
return 0;
}
}
protected void tightMarshalByteSequence2(ByteSequence data, DataOutput dataOut, BooleanStream bs)
throws IOException {
if (bs.readBoolean()) {
dataOut.writeInt(data.getLength());
dataOut.write(data.getData(), data.getOffset(), data.getLength());
}
}
protected ByteSequence tightUnmarshalByteSequence(DataInput dataIn, BooleanStream bs) throws IOException {
ByteSequence rc = null;
if (bs.readBoolean()) {
int size = dataIn.readInt();
byte[] t = new byte[size];
dataIn.readFully(t);
return new ByteSequence(t, 0, size);
}
return rc;
}
//
// The loose marshaling logic
//
public void looseMarshal(OpenWireFormat wireFormat, Object o, DataOutput dataOut) throws IOException {
}
public void looseUnmarshal(OpenWireFormat wireFormat, Object o, DataInput dataIn) throws IOException {
}
public void looseMarshalLong(OpenWireFormat wireFormat, long o, DataOutput dataOut) throws IOException {
dataOut.writeLong(o);
}
public long looseUnmarshalLong(OpenWireFormat wireFormat, DataInput dataIn) throws IOException {
return dataIn.readLong();
}
protected DataStructure looseUnmarsalNestedObject(OpenWireFormat wireFormat, DataInput dataIn)
throws IOException {
return wireFormat.looseUnmarshalNestedObject(dataIn);
}
protected void looseMarshalNestedObject(OpenWireFormat wireFormat, DataStructure o, DataOutput dataOut)
throws IOException {
wireFormat.looseMarshalNestedObject(o, dataOut);
}
protected DataStructure looseUnmarsalCachedObject(OpenWireFormat wireFormat, DataInput dataIn)
throws IOException {
if (wireFormat.isCacheEnabled()) {
if (dataIn.readBoolean()) {
short index = dataIn.readShort();
DataStructure object = wireFormat.looseUnmarshalNestedObject(dataIn);
wireFormat.setInUnmarshallCache(index, object);
return object;
} else {
short index = dataIn.readShort();
return wireFormat.getFromUnmarshallCache(index);
}
} else {
return wireFormat.looseUnmarshalNestedObject(dataIn);
}
}
protected void looseMarshalCachedObject(OpenWireFormat wireFormat, DataStructure o, DataOutput dataOut)
throws IOException {
if (wireFormat.isCacheEnabled()) {
Short index = wireFormat.getMarshallCacheIndex(o);
dataOut.writeBoolean(index == null);
if (index == null) {
index = wireFormat.addToMarshallCache(o);
dataOut.writeShort(index);
wireFormat.looseMarshalNestedObject(o, dataOut);
} else {
dataOut.writeShort(index);
}
} else {
wireFormat.looseMarshalNestedObject(o, dataOut);
}
}
protected Throwable looseUnmarsalThrowable(OpenWireFormat wireFormat, DataInput dataIn)
throws IOException {
if (dataIn.readBoolean()) {
String clazz = looseUnmarshalString(dataIn);
String message = looseUnmarshalString(dataIn);
Throwable o = createThrowable(clazz, message);
if (wireFormat.isStackTraceEnabled()) {
if (STACK_TRACE_ELEMENT_CONSTRUCTOR != null) {
StackTraceElement ss[] = new StackTraceElement[dataIn.readShort()];
for (int i = 0; i < ss.length; i++) {
try {
ss[i] = (StackTraceElement)STACK_TRACE_ELEMENT_CONSTRUCTOR
.newInstance(new Object[] {looseUnmarshalString(dataIn),
looseUnmarshalString(dataIn),
looseUnmarshalString(dataIn),
dataIn.readInt()});
} catch (IOException e) {
throw e;
} catch (Throwable e) {
}
}
o.setStackTrace(ss);
} else {
short size = dataIn.readShort();
for (int i = 0; i < size; i++) {
looseUnmarshalString(dataIn);
looseUnmarshalString(dataIn);
looseUnmarshalString(dataIn);
dataIn.readInt();
}
}
o.initCause(looseUnmarsalThrowable(wireFormat, dataIn));
}
return o;
} else {
return null;
}
}
protected void looseMarshalThrowable(OpenWireFormat wireFormat, Throwable o, DataOutput dataOut)
throws IOException {
dataOut.writeBoolean(o != null);
if (o != null) {
looseMarshalString(o.getClass().getName(), dataOut);
looseMarshalString(cutMessageIfNeeded(o.getMessage()), dataOut);
if (wireFormat.isStackTraceEnabled()) {
StackTraceElement[] stackTrace = o.getStackTrace();
dataOut.writeShort(stackTrace.length);
for (int i = 0; i < stackTrace.length; i++) {
StackTraceElement element = stackTrace[i];
looseMarshalString(element.getClassName(), dataOut);
looseMarshalString(element.getMethodName(), dataOut);
looseMarshalString(element.getFileName(), dataOut);
dataOut.writeInt(element.getLineNumber());
}
looseMarshalThrowable(wireFormat, o.getCause(), dataOut);
}
}
}
protected String looseUnmarshalString(DataInput dataIn) throws IOException {
if (dataIn.readBoolean()) {
return dataIn.readUTF();
} else {
return null;
}
}
protected void looseMarshalString(String value, DataOutput dataOut) throws IOException {
dataOut.writeBoolean(value != null);
if (value != null) {
dataOut.writeUTF(value);
}
}
protected void looseMarshalObjectArray(OpenWireFormat wireFormat, DataStructure[] objects,
DataOutput dataOut) throws IOException {
dataOut.writeBoolean(objects != null);
if (objects != null) {
dataOut.writeShort(objects.length);
for (int i = 0; i < objects.length; i++) {
looseMarshalNestedObject(wireFormat, objects[i], dataOut);
}
}
}
protected void looseMarshalConstByteArray(OpenWireFormat wireFormat, byte[] data, DataOutput dataOut,
int i) throws IOException {
dataOut.write(data, 0, i);
}
protected byte[] looseUnmarshalConstByteArray(DataInput dataIn, int i) throws IOException {
byte data[] = new byte[i];
dataIn.readFully(data);
return data;
}
protected void looseMarshalByteArray(OpenWireFormat wireFormat, byte[] data, DataOutput dataOut)
throws IOException {
dataOut.writeBoolean(data != null);
if (data != null) {
dataOut.writeInt(data.length);
dataOut.write(data);
}
}
protected byte[] looseUnmarshalByteArray(DataInput dataIn) throws IOException {
byte rc[] = null;
if (dataIn.readBoolean()) {
int size = dataIn.readInt();
rc = new byte[size];
dataIn.readFully(rc);
}
return rc;
}
protected void looseMarshalByteSequence(OpenWireFormat wireFormat, ByteSequence data, DataOutput dataOut)
throws IOException {
dataOut.writeBoolean(data != null);
if (data != null) {
dataOut.writeInt(data.getLength());
dataOut.write(data.getData(), data.getOffset(), data.getLength());
}
}
protected ByteSequence looseUnmarshalByteSequence(DataInput dataIn) throws IOException {
ByteSequence rc = null;
if (dataIn.readBoolean()) {
int size = dataIn.readInt();
byte[] t = new byte[size];
dataIn.readFully(t);
rc = new ByteSequence(t, 0, size);
}
return rc;
}
protected String cutMessageIfNeeded(final String message) {
return (message.length() > MAX_EXCEPTION_MESSAGE_SIZE)?
message.substring(0, MAX_EXCEPTION_MESSAGE_SIZE - 3) + "..." : message;
}
}