org.jvnet.hk2.internal.Collector Maven / Gradle / Ivy
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package org.jvnet.hk2.internal;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import org.glassfish.hk2.api.MultiException;
/**
* This class collects errors, and can then also produce a MultiException
* from those errors if necessary
*
* @author jwells
*/
public class Collector {
private LinkedHashSet throwables;
public void addMultiException(MultiException me) {
if (me == null) return;
if (throwables == null) throwables = new LinkedHashSet();
throwables.addAll(me.getErrors());
}
/**
* Adds a throwable to the list of throwables in this collector
* @param th The throwable to add to the list
*/
public void addThrowable(Throwable th) {
if (th == null) return;
if (throwables == null) throwables = new LinkedHashSet();
if (th instanceof MultiException) {
throwables.addAll(((MultiException) th).getErrors());
}
else {
throwables.add(th);
}
}
/**
* This method will throw if the list of throwables associated with this
* collector is not empty
*
* @throws MultiException An exception with all the throwables found in this collector
*/
public void throwIfErrors() throws MultiException {
if (throwables == null || throwables.isEmpty()) return;
throw new MultiException(new LinkedList(throwables));
}
/**
* Returns true if this collector has errors
*
* @return true if the collector has errors
*/
public boolean hasErrors() {
return ((throwables != null) && (!throwables.isEmpty()));
}
}