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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
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*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
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*/
package org.glassfish.hk2.api;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
/**
* This exception can contain multiple other exceptions.
* However, it will also have the causal chain of the
* first exception added to the list of exceptions
*
* @author jwells
*
*/
public class MultiException extends HK2RuntimeException {
/**
* For serialization
*/
private static final long serialVersionUID = 2112432697858621044L;
private final Object lock = new Object();
private final List throwables = new LinkedList();
/**
* Creates an empty MultiException
*/
public MultiException() {
super();
}
/**
* This list must have at least one element in it.
* The first element of the list will become the
* cause of this exception, and its message will become
* the message of this exception
*
* @param ths A non-null, non-empty list of exceptions
*/
public MultiException(List ths) {
super(ths.get(0).getMessage(), ths.get(0));
for (Throwable th : ths) {
if (th instanceof MultiException) {
MultiException me = (MultiException) th;
throwables.addAll(me.throwables);
}
else {
throwables.add(th);
}
}
}
/**
* This allows for construction of a MultiException
* with one element in its list
*
* @param th May not be null
*/
public MultiException(Throwable th) {
super(th.getMessage(), th);
if (th instanceof MultiException) {
MultiException me = (MultiException) th;
throwables.addAll(me.throwables);
}
else {
throwables.add(th);
}
}
/**
* Gets all the errors associated with this MultiException
*
* @return All the errors associated with this MultiException. Will
* not return null, but may return an empty object
*/
public List getErrors() {
synchronized (lock) {
return Collections.unmodifiableList(throwables);
}
}
/**
* Adds an error to an existing exception
*
* @param error The exception to add
*/
public void addError(Throwable error) {
synchronized (lock) {
throwables.add(error);
}
}
public String getMessage() {
List listCopy = getErrors();
StringBuffer sb = new StringBuffer("A MultiException has " + listCopy.size() + " exceptions. They are:\n");
int lcv = 1;
for (Throwable th : listCopy) {
sb.append(lcv++ + ". " + th.getClass().getName() + ((th.getMessage() != null) ? ": " + th.getMessage() : "" ) + "\n");
}
return sb.toString();
}
public void printStackTrace(PrintStream s) {
List listCopy = getErrors();
if (listCopy.size() <= 0) {
super.printStackTrace(s);
return;
}
int lcv = 1;
for (Throwable th : listCopy) {
s.println("MultiException stack " + lcv++ + " of " + listCopy.size());
th.printStackTrace(s);
}
}
public void printStackTrace(PrintWriter s) {
List listCopy = getErrors();
if (listCopy.size() <= 0) {
super.printStackTrace(s);
return;
}
int lcv = 1;
for (Throwable th : listCopy) {
s.println("MultiException stack " + lcv++ + " of " + listCopy.size());
th.printStackTrace(s);
}
}
public String toString() {
return getMessage();
}
}