@Override
public void parse(InputStream in, DistanceCacheWriter cache) {
reader.reset(in);
int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
IndefiniteProgress prog =
LOG.isVerbose() ? new IndefiniteProgress("Parsing distance matrix", LOG) : null;
try {
while (reader.nextLineExceptComments()) {
LOG.incrementProcessed(prog);
if (!tokenizer.valid()) {
throw new IllegalArgumentException(
"Less than three values in line " + reader.getLineNumber());
}
int id1, id2;
try {
id1 = (int) tokenizer.getLongBase10();
tokenizer.advance();
} catch (NumberFormatException e) {
throw new IllegalArgumentException(
"Error in line " + reader.getLineNumber() + ": id1 is not an integer!");
}
if (!tokenizer.valid()) {
throw new IllegalArgumentException(
"Less than three values in line " + reader.getLineNumber());
}
try {
id2 = (int) tokenizer.getLongBase10();
tokenizer.advance();
} catch (NumberFormatException e) {
throw new IllegalArgumentException(
"Error in line " + reader.getLineNumber() + ": id2 is not an integer!");
}
if (!tokenizer.valid()) {
throw new IllegalArgumentException(
"Less than three values in line " + reader.getLineNumber());
}
// Track minimum and maximum
if (id1 < id2) {
min = (id1 < min) ? id1 : min;
max = (id2 > min) ? id2 : max;
} else {
min = (id2 < min) ? id2 : min;
max = (id1 > min) ? id1 : max;
}
try {
double distance = tokenizer.getDouble();
cache.put(id1, id2, distance);
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException(
"Error in line " + reader.getLineNumber() + ":" + e.getMessage(), e);
}
tokenizer.advance();
if (tokenizer.valid()) {
throw new IllegalArgumentException(
"More than three values in line " + reader.getLineNumber());
}
}
} catch (IOException e) {
throw new IllegalArgumentException(
"Error while parsing line " + reader.getLineNumber() + ".");
}
LOG.setCompleted(prog);
// check if all distance values are specified
for (int i1 = min; i1 <= max; i1++) {
for (int i2 = i1 + 1; i2 <= max; i2++) {
if (!cache.containsKey(i1, i2)) {
throw new IllegalArgumentException(
"Distance value for " + i1 + " to " + i2 + " is missing!");
}
}
}
}
