@Override
public void reduce(Text key, Iterable<Text> values, Context context)
throws IOException, InterruptedException {
// For each value, figure out which file it's from and store it
// accordingly.
List<String> first = new ArrayList<String>();
List<String> second = new ArrayList<String>();
for (Text value : values) {
if (value.charAt(0) == '1') {
first.add(value.toString().substring(1));
} else second.add(value.toString().substring(1));
context.setStatus("OK");
}
context.setStatus("OK");
if (first.size() == 0) return;
if (second.size() == 0) second.add(null);
// Do the cross product
for (String s1 : first) {
for (String s2 : second) {
if (s2 == null) OUT.set(key.toString() + "\t" + s1 + "\t\t");
else OUT.set(key.toString() + "\t" + s1 + "\t" + key.toString() + "\t" + s2);
context.write(NULL, OUT);
}
}
}
public int[] searchBounds(Text key) throws IOException {
if (key.getLength() == 0) return defaultReturn;
int[] boundaries = map.get(key.charAt(0));
if (boundaries == null) return defaultReturn;
return boundaries;
}
public void map(Object key, Text value, Context context)
throws IOException, InterruptedException {
int start = 0;
while (start < value.getLength()) {
// Find the start of a node
start = value.find("node", start);
if (start == -1) break;
// Find the id of that node
start = value.find(" id", start);
if (start == -1) break;
start += 5;
int c = ':';
StringBuilder temp = new StringBuilder();
for (; start < value.getLength(); start++) {
c = value.charAt(start);
if (c != '"') temp.append(c);
else break;
}
if (start > value.getLength()) break;
try {
id.set(Long.parseLong(temp.toString()));
} catch (NumberFormatException e) {
// My Job isn't to worry about java not having unsigned values because they are stupid
id.set(404);
}
start = value.find(" lat", start);
if (start == -1) break;
start += 6;
c = ':';
temp.delete(0, temp.length());
for (; start < value.getLength(); start++) {
c = value.charAt(start);
if (c != '"') temp.append((char) c);
else break;
}
if (start > value.getLength()) break;
node.setY(Double.parseDouble(temp.toString()));
if (node.getY() < minlat || node.getY() > maxlat) {
continue; // Don't care about nodes outside our area of interest
}
start = value.find(" lon", start);
if (start == -1) break;
start += 6;
c = ':';
temp.delete(0, temp.length());
for (; start < value.getLength(); start++) {
c = value.charAt(start);
if (c != '"') temp.append((char) c);
else break;
}
if (start > value.getLength()) break;
node.setX(Double.parseDouble(temp.toString()));
if (node.getX() < minlon || node.getX() > maxlon)
continue; // Don't care about nodes outside our area of interest
context.write(node, id);
}
}
