public String toString() {
if (PrintLow.shouldPrintAtCurrentLevel()) {
final SubLObject oldLevel = PrintLow.maybeIncreasePrintLevel();
try {
if (this == SubLNil.NIL) {
return "NIL";
}
SubLListListIterator iter = null;
Resourcer resourcer = Resourcer.getInstance();
try {
final StringBuilder buf = new StringBuilder("(");
final boolean checkLength = PrintLow.controlPrintLength();
final int printLength = PrintLow.maxPrintLength();
int counter = 0;
boolean terminatedEarly = false;
iter = resourcer.acquireSubLListListIterator(this);
while (iter.hasNext() && (!iter.isNextImproperElement())) {
buf.append(iter.next());
if (checkLength) {
counter++;
if (counter >= printLength) {
buf.append(" ... ");
terminatedEarly = true;
break;
}
}
if (iter.hasNext()) {
buf.append(" ");
}
}
if (!terminatedEarly && iter.isNextImproperElement()) {
buf.append(" . ").append(iter.getDottedElement());
}
buf.append(")");
return buf.toString();
} finally {
resourcer.releaseSubLListListIterator(iter);
}
} finally {
PrintLow.maybeDecreasePrintLevel(oldLevel);
}
} else {
return "( # )";
}
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
SubLObject sublObj = (SubLObject) obj;
if (!sublObj.isList()) {
return false;
}
SubLList otherCons = sublObj.toList();
SubLListListIterator iter1 = null;
SubLListListIterator iter2 = null;
Resourcer resourcer = Resourcer.getInstance();
try {
iter1 = resourcer.acquireSubLListListIterator(this);
iter2 = resourcer.acquireSubLListListIterator(otherCons);
while (iter1.hasNext() && (!iter1.isNextImproperElement())) {
if ((!iter2.hasNext()) || (iter2.isNextImproperElement())) {
return false;
}
if (!iter1.next().equals(iter2.next())) {
return false;
}
}
if (iter1.isNextImproperElement()) {
if (iter2.isNextImproperElement()) {
return iter1.getDottedElement().equals(iter2.getDottedElement());
}
return false;
} else if (iter2.hasNext()) {
// iter1 is prefix of iter2 case
return false;
}
// they should be equal at this point
return true;
} finally {
resourcer.releaseSubLListListIterator(iter1);
resourcer.releaseSubLListListIterator(iter2);
}
}
public int hashCode(int currentDepth) {
if (currentDepth < MAX_HASH_DEPTH) {
SubLListListIterator iter = null;
Resourcer resourcer = Resourcer.getInstance();
int hashCode = 0;
try {
int index = 0;
iter = resourcer.acquireSubLListListIterator(this);
while (iter.hasNext() && (!iter.isNextImproperElement()) && (index++ < MAX_HASH_LENGTH)) {
hashCode ^= iter.nextSubLObject().hashCode(currentDepth + 1);
index++;
}
if (iter.isNextImproperElement()) {
hashCode ^= iter.getDottedElement().hashCode(currentDepth + 1);
}
return hashCode;
} finally {
resourcer.releaseSubLListListIterator(iter);
}
} else {
return DEFAULT_EXCEEDED_HASH_VALUE;
}
}
private final SubLList mapResult(
SubLFunction function, SubLObject[] moreLists, boolean returnConsedResults) {
ArrayList<SubLObject> results = new ArrayList<SubLObject>();
SubLListListIterator[] iterators =
new SubLListListIterator[1 + moreLists.length]; // @todo get rid of call to new -APB
int iteratorCount = iterators.length;
SubLObject[] args = null;
Resourcer resourcer = Resourcer.getInstance();
try {
args = resourcer.acquireSubLObjectArray(iteratorCount);
iterators[0] = resourcer.acquireSubLListListIterator(this);
for (int i = 0, size = moreLists.length; i < size; i++) {
iterators[i + 1] = resourcer.acquireSubLListListIterator(moreLists[i].toList());
}
SubLListListIterator iter = null;
SubLObject curResult = null;
while (true) {
for (int i = 0; i < iteratorCount; i++) {
iter = iterators[i];
if (!iter.hasNext()) {
return SubLObjectFactory.makeList(results);
}
if (iter.isNextImproperElement()) {
Errors.error("Unexpected improper list: " + ((i == 0) ? this : moreLists[i - 1]));
}
args[i] = iter.nextSubLObject();
}
curResult = Functions.funcall(function, args);
if (results != null) {
results.add(curResult);
}
}
} finally {
resourcer.releaseSubLObjectArray(args);
for (int i = 0, size = iterators.length; i < size; i++) {
resourcer.releaseSubLListListIterator(iterators[i]);
}
}
}