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package org.testifyproject.glassfish.hk2.api;
import java.io.PrintStream;
import java.io.PrintWriter;
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 byte[0]; // byte[0] is an arbitrary type that is Serializable
private final List throwables = new LinkedList();
private boolean reportToErrorService = true;
/**
* 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, boolean reportToErrorService) {
super(th.getMessage(), th);
if (th instanceof MultiException) {
MultiException me = (MultiException) th;
throwables.addAll(me.throwables);
}
else {
throwables.add(th);
}
this.reportToErrorService = reportToErrorService;
}
/**
* This allows for construction of a MultiException
* with one element in its list
*
* @param th May not be null
*/
public MultiException(Throwable th) {
this(th, true);
}
/**
* 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 new LinkedList(throwables);
}
}
/**
* Adds an error to an existing exception
*
* @param error The exception to add
*/
public void addError(Throwable error) {
synchronized (lock) {
throwables.add(error);
}
}
/**
* Gets the message associated with this exception
*/
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();
}
/**
* Prints the stack trace of this exception to the given PrintStream
*/
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);
}
}
/**
* Prints the stack trace of this exception to the given PrintWriter
*/
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);
}
}
/**
* Returns true if this exception should be reported
* to the error service when thrown during a creation
* or deletion of a service
*
* @return true if this exception should be reported to
* the error service when creating or deleting a service
*/
public boolean getReportToErrorService() {
return reportToErrorService;
}
/**
* Sets if this exception should be reported
* to the error service when thrown during a creation
* or deletion of a service
*
* @param report true if this exception should be reported to
* the error service when creating or deleting a service
*/
public void setReportToErrorService(boolean report) {
reportToErrorService = report;
}
@Override
public String toString() {
return getMessage();
}
}
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