/*
* 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.deltaspike.core.api.exception.control.event;
import org.apache.deltaspike.core.api.exception.control.ExceptionStackItem;
import javax.enterprise.inject.Typed;
import java.io.Serializable;
import java.sql.SQLException;
import java.util.ArrayDeque;
import java.util.Collection;
import java.util.Collections;
import java.util.Deque;
/**
* Information about the current exception and exception cause container. This object is not immutable.
*/
@SuppressWarnings("CdiManagedBeanInconsistencyInspection")
@Typed()
public class ExceptionStackEvent implements Serializable
{
private static final long serialVersionUID = -6069790756478700680L;
private boolean root;
private boolean last;
private int initialStackSize;
private Throwable next;
private Collection<ExceptionStackItem> remaining;
private Deque<ExceptionStackItem> exceptionStackItems;
// private Deque<ExceptionStackItem> origExceptionStackItems; // TODO: Later
private Collection<Throwable> causes;
private Throwable current;
/**
* Builds the stack from the given exception.
*
* @param exception Caught exception
*/
public ExceptionStackEvent(final Throwable exception)
{
if (exception == null)
{
throw new IllegalArgumentException("exception must not be null");
}
Throwable e = exception;
exceptionStackItems = new ArrayDeque<ExceptionStackItem>();
do
{
exceptionStackItems.addFirst(new ExceptionStackItem(e));
if (e instanceof SQLException)
{
SQLException sqlException = (SQLException) e;
while (sqlException.getNextException() != null)
{
sqlException = sqlException.getNextException();
exceptionStackItems.addFirst(new ExceptionStackItem(sqlException));
}
}
e = e.getCause();
}
while (e != null);
initialStackSize = exceptionStackItems.size();
causes = createThrowableCollection(exceptionStackItems);
// TODO: Later this.origExceptionStackItems = new ArrayDeque<ExceptionStackItem>(exceptionStackItems);
init();
}
private void init()
{
root = exceptionStackItems.size() == initialStackSize;
if (!exceptionStackItems.isEmpty())
{
current = exceptionStackItems.removeFirst().getThrowable();
remaining = Collections.unmodifiableCollection(exceptionStackItems);
}
else
{
remaining = Collections.emptyList();
current = null;
}
last = remaining.isEmpty();
next = (last) ? null : exceptionStackItems.peekFirst().getThrowable();
}
private Collection<ExceptionStackItem> createExceptionStackFrom(Collection<Throwable> throwables)
{
final Deque<ExceptionStackItem> returningCollection = new ArrayDeque<ExceptionStackItem>(throwables.size());
for (Throwable t : throwables)
{
returningCollection.addFirst(new ExceptionStackItem(t));
}
return returningCollection;
}
private Collection<Throwable> createThrowableCollection(final Collection<ExceptionStackItem> exceptionStackItems)
{
// allow current
final Deque<Throwable> returningCollection = new ArrayDeque<Throwable>(exceptionStackItems.size() + 1);
for (ExceptionStackItem item : exceptionStackItems)
{
returningCollection.addFirst(item.getThrowable());
}
return returningCollection;
}
public Collection<Throwable> getCauseElements()
{
return Collections.unmodifiableCollection(causes);
}
/**
* Test if iteration is finished
*
* @return finished with iteration
*/
public boolean isLast()
{
return last;
}
public Throwable getNext()
{
return next;
}
public Collection<Throwable> getRemaining()
{
return Collections.unmodifiableCollection(createThrowableCollection(remaining));
}
/**
* Tests if the current exception is the root exception
*
* @return Returns true if iteration is at the root exception (top of the inverted stack)
*/
public boolean isRoot()
{
return root;
}
/**
* Current exception in the iteration
*
* @return current exception
*/
public Throwable getCurrent()
{
return current;
}
/**
* Internal only.
*
* @param elements new stack.
*/
public void setCauseElements(Collection<Throwable> elements)
{
exceptionStackItems = new ArrayDeque<ExceptionStackItem>(createExceptionStackFrom(elements));
init();
}
/**
* Internal only.
*/
public void skipCause()
{
init();
}
/**
* Done later
* The original exception stack if it has been changed.
*
* @return The original exception stack
public Deque<ExceptionStackItem> getOrigExceptionStackItems() {
}
*/
}