/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.client.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.teiid.core.CorePlugin;
import org.teiid.core.TeiidException;
import org.teiid.core.TeiidRuntimeException;
import org.teiid.core.util.ExternalizeUtil;
import org.teiid.core.util.ObjectInputStreamWithClassloader;
import org.teiid.core.util.ReflectionHelper;
public class ExceptionHolder implements Externalizable {
private Throwable exception;
private boolean nested = false;
public ExceptionHolder() {
}
public ExceptionHolder(Throwable exception) {
this.exception = exception;
}
public ExceptionHolder(Throwable exception, boolean nested) {
this.exception = exception;
this.nested = nested;
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
List<String> classNames = ExternalizeUtil.readList(in, String.class);
String message = (String)in.readObject();
StackTraceElement[] stackTrace = (StackTraceElement[])in.readObject();
String code = (String)in.readObject();
ExceptionHolder causeHolder = (ExceptionHolder)in.readObject();
byte[] serializedException = (byte[])in.readObject();
this.exception = readFromByteArray(serializedException);
if (this.exception == null) {
Throwable t = buildException(classNames, message, stackTrace, code);
if (t == null) {
if (causeHolder != null) {
this.exception = causeHolder.exception;
}
}
else {
if (causeHolder != null) {
t.initCause(causeHolder.exception);
}
this.exception = t;
}
}
if (this.exception == null) {
this.exception = new TeiidRuntimeException(message);
this.exception.setStackTrace(stackTrace);
}
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
List<String> classNames = new ArrayList<String>();
Class<?> clazz = exception.getClass();
while (clazz != null) {
if (clazz == Throwable.class || clazz == Exception.class) {
break;
}
classNames.add(clazz.getName());
clazz = clazz.getSuperclass();
}
ExternalizeUtil.writeList(out, classNames);
out.writeObject(exception.getMessage());
out.writeObject(exception.getStackTrace());
if (exception instanceof TeiidException) {
out.writeObject(((TeiidException)exception).getCode());
} else {
out.writeObject(null);
}
// specify that this cause is nested exception; not top level
if (this.exception.getCause() != null && this.exception.getCause() != this.exception) {
out.writeObject(new ExceptionHolder(this.exception.getCause(), true));
}
else {
out.writeObject(null);
}
// only for the top level exception write the serialized block for the object
if (!nested) {
out.writeObject(writeAsByteArray(this.exception));
}
else {
out.writeObject(null);
}
}
public Throwable getException() {
return exception;
}
private Throwable buildException(List<String> classNames, String message, StackTraceElement[] stackTrace, String code) {
if (classNames.isEmpty()) {
return null;
}
String originalClass = classNames.get(0);
List<String> args = Arrays.asList(CorePlugin.Util.getString("ExceptionHolder.converted_exception", message, originalClass)); //$NON-NLS-1$
Throwable result = null;
for (String className : classNames) {
try {
result = (Throwable)ReflectionHelper.create(className, args, ExceptionHolder.class.getClassLoader());
result.setStackTrace(stackTrace);
break;
} catch (TeiidException e1) {
//
}
}
if (result instanceof TeiidException) {
((TeiidException)result).setCode(code);
((TeiidException)result).setOriginalType(classNames.get(0));
}
return result;
}
private byte[] writeAsByteArray(Throwable t) {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeObject(t);
oos.flush();
oos.close();
return baos.toByteArray();
} catch (IOException e) {
return null;
}
}
private Throwable readFromByteArray(byte[] contents) {
// only for top level we would have the contents as not null.
if (contents != null) {
ByteArrayInputStream bais = new ByteArrayInputStream(contents);
try {
ObjectInputStream ois = new ObjectInputStreamWithClassloader(bais, ExceptionHolder.class.getClassLoader());
return (Throwable)ois.readObject();
} catch (Exception e) {
//
}
}
return null;
}
public static List<ExceptionHolder> toExceptionHolders(List<? extends Throwable> throwables){
List<ExceptionHolder> list = new ArrayList<ExceptionHolder>();
for (Throwable t: throwables) {
list.add(new ExceptionHolder(t));
}
return list;
}
public static List<Throwable> toThrowables(List<ExceptionHolder> exceptionHolders) {
List<Throwable> list = new ArrayList<Throwable>();
for(ExceptionHolder e: exceptionHolders) {
list.add(e.getException());
}
return list;
}
}