/**
* Returns an {@link Iterator} over a {@link Collection} of Throwable types which iterates over
* its elements in a consistent order (maintaining an ordering that is consistent across different
* runs makes it easier to compare sets generated by different implementations of the CFG
* classes).
*
* @param coll The collection to iterate over.
* @return An iterator which presents the elements of <code>coll</code> in order.
*/
private static Iterator sortedThrowableIterator(Collection coll) {
if (coll.size() <= 1) {
return coll.iterator();
} else {
Object array[] = coll.toArray();
Arrays.sort(array, new ThrowableComparator());
return Arrays.asList(array).iterator();
}
}
/**
* Utility method which prints the abbreviations of the elements in a passed {@link Set} of
* exception types.
*
* @param s The exceptions to print.
* @param connector The character to insert between exceptions.
* @return An abbreviated representation of the exceptions.
*/
private String toAbbreviatedString(Set s, char connector) {
final String JAVA_LANG = "java.lang.";
final int JAVA_LANG_LENGTH = JAVA_LANG.length();
final String EXCEPTION = "Exception";
final int EXCEPTION_LENGTH = EXCEPTION.length();
Collection vmErrorThrowables = ThrowableSet.Manager.v().VM_ERRORS.exceptionsIncluded;
boolean containsAllVmErrors = s.containsAll(vmErrorThrowables);
StringBuffer buf = new StringBuffer();
if (containsAllVmErrors) {
buf.append(connector);
buf.append("vmErrors");
}
for (Iterator it = sortedThrowableIterator(s); it.hasNext(); ) {
RefLikeType reflikeType = (RefLikeType) it.next();
RefType baseType = null;
if (reflikeType instanceof RefType) {
baseType = (RefType) reflikeType;
if (vmErrorThrowables.contains(baseType) && containsAllVmErrors) {
continue; // Already accounted for vmErrors.
} else {
buf.append(connector);
}
} else if (reflikeType instanceof AnySubType) {
buf.append(connector);
buf.append('(');
baseType = ((AnySubType) reflikeType).getBase();
}
String typeName = baseType.toString();
if (typeName.startsWith(JAVA_LANG)) {
typeName = typeName.substring(JAVA_LANG_LENGTH);
}
if (typeName.length() > EXCEPTION_LENGTH && typeName.endsWith(EXCEPTION)) {
typeName = typeName.substring(0, typeName.length() - EXCEPTION_LENGTH);
}
buf.append(typeName);
if (reflikeType instanceof AnySubType) {
buf.append(')');
}
}
return buf.toString();
}