@Override
public void reduce(
Text key, Iterator<Text> values, OutputCollector<Text, Text> output, Reporter reporter)
throws IOException {
String line = "";
String header = "";
TreeMap<String, String> ciudades = new TreeMap<String, String>();
// Obtenemos los datos y los metemos a un treemap para que los ordene por ciudad
while (values.hasNext()) {
String[] tmp = values.next().toString().split(",");
String ciudad = tmp[0];
String mes = tmp[1];
String temperatura = tmp[2];
String fecha = tmp[3];
ciudades.put(ciudad, tmp[1] + "," + tmp[2] + "," + tmp[3]);
}
// Recorremos las ciudades y vamos imprimiendo
for (String ciudad : ciudades.keySet()) {
header += ciudad + ",,";
String[] temporal = ciudades.get(ciudad).split(",");
line += temporal[2] + "," + temporal[1] + ",";
}
if (c == 0) { // Imprimimos cabezera
output.collect(new Text("Año,"), new Text(header));
c++;
}
output.collect(new Text(key.toString() + ","), new Text(line));
}
void search(
Vector<Star> v1,
Vector<Star> v2,
BlockIDWritable key,
OutputCollector<BlockIDWritable, PairWritable> output)
throws IOException {
for (int i = 0; i < v1.size(); i++) {
for (int j = 0; j < v2.size(); j++) {
Star star1 = v1.get(i);
Star star2 = v2.get(j);
// what is this margin about
if (star1.margin && star2.margin) continue;
double dist = star1.x * star2.x + star1.y * star2.y + star1.z * star2.z;
if (dist > costheta) {
p.set(star1, star2, dist);
output.collect(key, p);
p.set(star2, star1, dist);
output.collect(key, p);
// num += 2;
}
}
} // end for i,j
}
@SuppressWarnings("unchecked")
public void reduce(
Text key,
Iterator<Text> values,
OutputCollector<NullWritable, Text> output,
Reporter reporter)
throws IOException {
OutputCollector collector =
multipleOutputs.getCollector("station", key.toString().replace("-", ""), reporter);
while (values.hasNext()) {
collector.collect(NullWritable.get(), values.next());
}
}
public void map(
LongWritable key, Text value, OutputCollector<LongWritable, Text> output, Reporter reporter)
throws IOException {
String line = value.toString();
if (validate(line, reporter)) output.collect(key, value);
}
public void map(
LongWritable key,
Text value,
OutputCollector<IntWritable, DoubleWritable> output,
Reporter reporter)
throws IOException {
/*
* It implements the mapper. It outputs the numbers of weight and updated weights.
*
* Note that the format of intermediate output is <IntWritable, DoubleWritable>,
* because the key is the number of weight (an integer), and the value is the weight's value (double)
*/
inputData = value.toString();
// go through the process
initialize();
getposphase();
getnegphase();
update();
// output the intermediate data
// The <key, value> pairs are <weightID, weightUpdate>
double[][] vishidinc_array = vishidinc.getArray();
for (int i = 0; i < numdims; i++) {
for (int j = 0; j < numhid; j++) {
weightPos.set(i * numhid + j);
weightValue.set(vishidinc_array[i][j]);
output.collect(weightPos, weightValue);
}
}
}
// specify input and out keys
public void map(
LongWritable key, Text value, OutputCollector<Text, Text> output, Reporter reporter)
throws IOException {
String line = value.toString(); // define new variable to be string
ArrayList<Integer> range = new ArrayList<Integer>();
for (int i = 2000; i <= 2010; i++) {
range.add(i);
}
// String[] inputs = line.split(",(?=([^\"]*\"[^\"]*\")*[^\"]*$)");
String[] inputs = line.split(",");
try {
int year = Integer.parseInt(inputs[165]);
if (range.contains(year)) {
String dur = inputs[3];
String artist_name = inputs[2];
String song_title = inputs[1];
String final_input = artist_name + ',' + dur + ',' + song_title;
Final_Value.set(final_input);
output.collect(Final_Value, dummy);
}
} catch (NumberFormatException e) {
// do nothing
}
}
public void map(
LongWritable key, Text value, OutputCollector<Text, Text> output, Reporter reporter)
throws IOException {
parser.parse(value);
output.collect(new Text(parser.getStationId()), value);
}
/**
* Takes in (id, node) pairs and emits them right back out
*
* @param key The Node ID
* @param Node The Node object
* @param output An Output Collector that collects (id, node) pairs
* @param reporter Default reporter object
*/
public void map(
IntWritable key,
WikiPage value,
OutputCollector<IntWritable, WikiPage> output,
Reporter reporter)
throws IOException {
output.collect(key, value);
}
public void reduce(
DoubleWritable key,
Iterator<DoubleWritable> values,
OutputCollector<DoubleWritable, Text> output,
Reporter reporter)
throws IOException {
output.collect(key, new Text(values.next().toString() + " - "));
}
public void reduce(
IntPair key,
Iterator<NullWritable> values,
OutputCollector<IntPair, NullWritable> output,
Reporter reporter)
throws IOException {
/*[*/ output.collect(key, NullWritable.get()); /*]*/
}
public void map(LongWritable key, Text value, OutputCollector output, Reporter reporter)
throws IOException {
String line = value.toString();
StringTokenizer tokenizer = new StringTokenizer(line);
while (tokenizer.hasMoreTokens()) {
word.set(tokenizer.nextToken());
output.collect(word, one);
}
}
@Override
public void reduce(
IntWritable key,
Iterator<DoubleWritable> values,
OutputCollector<IntWritable, DoubleWritable> output,
Reporter reporter)
throws IOException {
output.collect(key, values.next());
}
public void reduce(
Text key,
Iterator<CrawlDatum> values,
OutputCollector<Text, CrawlDatum> output,
Reporter reporter)
throws IOException {
boolean oldSet = false;
boolean injectedSet = false;
while (values.hasNext()) {
CrawlDatum val = values.next();
if (val.getStatus() == CrawlDatum.STATUS_INJECTED) {
injected.set(val);
injected.setStatus(CrawlDatum.STATUS_DB_UNFETCHED);
injectedSet = true;
} else {
old.set(val);
oldSet = true;
}
}
CrawlDatum res = null;
/**
* Whether to overwrite, ignore or update existing records
*
* @see https://issues.apache.org/jira/browse/NUTCH-1405
*/
// Injected record already exists and overwrite but not update
if (injectedSet && oldSet && overwrite) {
res = injected;
if (update) {
LOG.info(key.toString() + " overwritten with injected record but update was specified.");
}
}
// Injected record already exists and update but not overwrite
if (injectedSet && oldSet && update && !overwrite) {
res = old;
old.putAllMetaData(injected);
old.setScore(injected.getScore() != scoreInjected ? injected.getScore() : old.getScore());
old.setFetchInterval(
injected.getFetchInterval() != interval
? injected.getFetchInterval()
: old.getFetchInterval());
}
// Old default behaviour
if (injectedSet && !oldSet) {
res = injected;
} else {
res = old;
}
output.collect(key, res);
}
public void reduce(
Text key,
Iterator<IntWritable> values,
OutputCollector<Text, IntWritable> output,
Reporter reporter)
throws IOException {
int sum = 0;
while (values.hasNext()) {
sum += values.next().get();
}
output.collect(key, new IntWritable(sum));
}
public void map(
LongWritable key, Text value, OutputCollector<IntWritable, Text> output, Reporter reporter)
throws IOException {
String arr[] = value.toString().split("\\r?\\n");
for (String row : arr) {
if (row.startsWith("\"")) {
continue;
}
String parts[] = row.split(",");
output.collect(new IntWritable(new Integer(parts[1])), new Text(parts[4]));
}
}
public void map(
LongWritable key,
Text value,
OutputCollector<IntWritable, IntWritable> output,
Reporter reporter)
throws IOException {
String line = value.toString();
IntWritable clave = new IntWritable();
IntWritable valor = new IntWritable();
clave.set(Integer.parseInt(line));
valor.set(Integer.parseInt(line) + 1);
output.collect(clave, valor);
}
public void map(
LongWritable key,
Text value,
OutputCollector<DoubleWritable, DoubleWritable> output,
Reporter reporter)
throws IOException {
String line = value.toString();
DoubleWritable clave = new DoubleWritable();
DoubleWritable valor = new DoubleWritable();
clave.set(Double.parseDouble(line));
valor.set(Math.sqrt(Double.parseDouble(line)));
output.collect(clave, valor);
}
// reduce method accepts the Key Value pairs from mappers, do the aggregation based on keys and
// produce the final out put
public void reduce(
Text key,
Iterator<IntWritable> values,
OutputCollector<Text, IntWritable> output,
Reporter reporter)
throws IOException {
int sum = 0;
/*iterates through all the values available with a key and add them together and give the
final result as the key and sum of its values*/
while (values.hasNext()) {
sum += values.next().get();
}
output.collect(key, new IntWritable(sum));
}
public void map(
LongWritable key,
Text value,
OutputCollector<IntPair, NullWritable> output,
Reporter reporter)
throws IOException {
parser.parse(value);
if (parser.isValidTemperature()) {
/*[*/ output.collect(
new IntPair(parser.getYearInt(), +parser.getAirTemperature()),
NullWritable.get()); /*]*/
}
}
@Override
public void reduce(
Text key, /*[*/
Iterator /*]*/<IntWritable> values,
/*[*/ OutputCollector<Text, IntWritable> output,
Reporter reporter /*]*/)
throws IOException {
int maxValue = Integer.MIN_VALUE;
while (
/*[*/ values.hasNext() /*]*/) {
maxValue = Math.max(maxValue, /*[*/ values.next().get() /*]*/);
}
/*[*/ output.collect /*]*/(key, new IntWritable(maxValue));
}
public void map(
LongWritable key, Text value, OutputCollector<Text, IntWritable> output, Reporter reporter)
throws IOException {
String line = value.toString();
String lastToken = null;
StringTokenizer s = new StringTokenizer(line, "\t");
String year = s.nextToken();
while (s.hasMoreTokens()) {
lastToken = s.nextToken();
}
int averagePrice = Integer.parseInt(lastToken);
output.collect(new Text(year), new IntWritable(averagePrice));
}
public void reduce(
Text key,
Iterator<IntWritable> value,
OutputCollector<Text, IntWritable> output,
Reporter reporter)
throws IOException {
// TODO Auto-generated method stub
int maxAvg = 30;
int val = Integer.MIN_VALUE;
while (value.hasNext()) {
if ((val = value.next().get()) > maxAvg) {
output.collect(key, new IntWritable(val));
}
}
}
@Override
public void map(
LongWritable key, Text value, OutputCollector<Text, Text> output, Reporter reporter)
throws IOException {
String line = value.toString();
StringTokenizer tokens = new StringTokenizer(line);
String[] keys = tokens.nextToken().toString().split("-");
String date_temp = tokens.nextToken();
String country = keys[0];
String year = keys[1];
// Mandamos año y un iterable de [ciudad,mes,temperatura,fecha]
output.collect(new Text(year), new Text(country + "," + date_temp));
}
/** Implements the map-method of the Mapper-interface */
@Override
public void map(
LongWritable key, Text value, OutputCollector<Text, IntWritable> output, Reporter reporter)
throws IOException {
String line = value.toString();
StringTokenizer tokenizer = new StringTokenizer(line);
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
if (token.length() > 3) {
word.set(token);
output.collect(word, one);
}
}
}
public void map(
LongWritable key, Point value, OutputCollector<LongWritable, Point> output, Reporter reporter)
throws IOException {
double min = value.sumOfSquares(centers.get(0));
int best = 0;
for (int index = 1; index < numberOfCenters; ++index) {
double current = value.sumOfSquares(centers.get(index));
if (current < min) {
min = current;
best = index;
}
}
reporter.incrCounter("NUMBER", "NODES", 1);
reporter.incrCounter("CENTER", "" + best, 1);
output.collect(new LongWritable(best), value);
}
public void map(
LongWritable key,
Text value,
OutputCollector<IntWritable, DoubleWritable> output,
Reporter reporter)
throws IOException {
String line = value.toString();
StringTokenizer tokenizer = new StringTokenizer(line);
int rowIdx = 0;
double xValue = 0;
if (tokenizer.hasMoreTokens()) {
rowIdx = Integer.parseInt(tokenizer.nextToken());
xValue = Double.parseDouble(tokenizer.nextToken());
}
double xResult = (resVec[rowIdx] - (sumVec[rowIdx] * xValue)) / diaVec[rowIdx];
output.collect(new IntWritable(rowIdx), new DoubleWritable(xResult));
}
@Override
public void map(
LongWritable key,
Text value,
/*[*/ OutputCollector<Text, IntWritable> output,
Reporter reporter /*]*/)
throws IOException {
String line = value.toString();
String year = line.substring(15, 19);
int airTemperature;
if (line.charAt(87) == '+') { // parseInt doesn't like leading plus signs
airTemperature = Integer.parseInt(line.substring(88, 92));
} else {
airTemperature = Integer.parseInt(line.substring(87, 92));
}
String quality = line.substring(92, 93);
if (airTemperature != MISSING && quality.matches("[01459]")) {
/*[*/ output.collect /*]*/(new Text(year), new IntWritable(airTemperature));
}
}
public void reduce(
IntWritable key,
Iterator<Text> values,
OutputCollector<IntWritable, Text> output,
Reporter reporter)
throws IOException {
HashMap<String, Integer> countries_map = new HashMap<String, Integer>();
ArrayList<Integer> counties = new ArrayList<>();
String cp = new String();
while (values.hasNext()) {
cp = values.next().toString();
if (countries_map.containsKey(cp)) {
countries_map.put(cp, countries_map.get(cp) + 1);
} else {
countries_map.put(cp, 1);
}
}
for (java.util.Map.Entry<String, Integer> entry : countries_map.entrySet()) {
counties.add(entry.getValue());
}
output.collect(
key,
new Text(
""
+ countries_map.entrySet().size()
+ " "
+ Collections.min(counties)
+ " "
+ median(counties)
+ " "
+ Collections.max(counties)
+ " "
+ mean(counties)
+ " "
+ standard_deviation(counties)));
}
public void reduce(
BlockIDWritable key,
Iterator<PairWritable> values,
OutputCollector<BlockIDWritable, PairWritable> output,
Reporter reporter)
throws IOException {
// Vector<Star> starV = new Vector<Star>();
int buketsizeX = 0;
int buketsizeY = 0;
double bwidth = maxAlphas[key.zoneNum]; // ra ,x
double bheight = theta; // dec ,y
/* add 10 more in each dimension to make sure there is no overflow. */
Vector<Star>[][] arrstarV =
new Vector[((int) (zoneHeight / bheight)) + 10]
[((int) (blockWidth / bwidth)) + 10]; // create bucket vector[Y][X]
int num = 0;
while (values.hasNext()) {
num++;
Star s = values.next().get(0);
// participant
double posx = (s.ra - blockRanges[key.raNum][0]) / bwidth;
int x = (int) posx + 1; // shit by 1 in case star comes from other block
double posy = (s.dec - zoneRanges[key.zoneNum][0]) / bheight;
int y = (int) posy + 1;
// set bucket size as max
if (buketsizeX < x) buketsizeX = x;
if (buketsizeY < y) buketsizeY = y;
// create according bucket
if (arrstarV[y][x] == null)
// TODO avaoid creating vectors here.
arrstarV[y][x] = new Vector<Star>();
// put star into bucket
arrstarV[y][x].add(s);
}
// start reducer
int i, j, row, col;
// for each bucket
for (row = 0; row <= buketsizeY; row++) {
for (col = 0; col <= buketsizeX; col++) {
// starV.clear();
// construct a new vector to do compare
// TODO we need to avoid searching objects in the border.
if (arrstarV[row][col] != null) {
// old method to generate output
for (i = 0; i < arrstarV[row][col].size(); i++) {
for (j = i + 1; j < arrstarV[row][col].size(); j++) {
Star star1 = arrstarV[row][col].get(i);
Star star2 = arrstarV[row][col].get(j);
// what is this margin about
if (star1.margin && star2.margin) continue;
double dist = star1.x * star2.x + star1.y * star2.y + star1.z * star2.z;
if (dist > costheta) {
p.set(star1, star2, dist);
output.collect(key, p);
p.set(star2, star1, dist);
output.collect(key, p);
// num += 2;
}
}
} // end for i,j
} // end if
else {
continue;
}
// 4 more neighbors
// right upper arrstarV[row-1][col+1] vs arrstarV[row][col]
if (row != 0 && arrstarV[row - 1][col + 1] != null) {
search(arrstarV[row][col], arrstarV[row - 1][col + 1], key, output);
}
// right arrstarV[row][col+1] vs arrstarV[row][col]
if (arrstarV[row][col + 1] != null) {
search(arrstarV[row][col], arrstarV[row][col + 1], key, output);
}
// right lower
if (arrstarV[row + 1][col + 1] != null) {
search(arrstarV[row][col], arrstarV[row + 1][col + 1], key, output);
}
// lower
if (arrstarV[row + 1][col] != null) {
search(arrstarV[row][col], arrstarV[row + 1][col], key, output);
} // end if
} // end colum
} // end row
}
public void map(
LongWritable key,
Star value,
OutputCollector<BlockIDWritable, PairWritable> output,
Reporter reporter)
throws IOException {
loc.set(value.ra, value.dec);
int zoneNum = loc.zoneNum;
int raNum = loc.raNum;
p.set(value, null);
/*
* When the block size increases (> theta), only part of a block
* needs to be copied to its neighbor.
*/
output.collect(loc, p);
/*
* only replicate objects in the border of a block. I expect most of
* objects don't need to be copied.
*/
if (value.dec > zoneRanges[zoneNum][0] + theta
&& value.dec < zoneRanges[zoneNum][1] - theta
&& value.ra > blockRanges[raNum][0] + maxAlphas[zoneNum]
&& value.ra < blockRanges[raNum][1] - maxAlphas[zoneNum]) return;
/*
* the code below is to copy the star to some neighbors. We only
* need to copy an object to the bottom, left, left bottom, left top
* neighbors
*/
value.margin = true;
/*
* we should treat the entire zone 0 as a block, so we only needs to
* copy some objects at the corner to their neighbors
*/
if (loc.zoneNum == 0) {
/* copy the object to the right top neighbor */
if (value.ra >= blockRanges[raNum][1] - maxAlphas[zoneNum]
&& value.ra <= blockRanges[raNum][1]
&& value.dec >= zoneRanges[zoneNum][1] - theta
&& value.dec <= zoneRanges[zoneNum][1]) {
// BlockIDWritable loc1 = new BlockIDWritable();
/* raNum of objects in zone 0 is always 0,
* we need to recalculate it. */
// loc1.raNum = BlockIDWritable.ra2Num(value.ra) + 1;
// if (loc1.raNum == numBlocks) {
// loc1.raNum = 0;
// value.ra -= 360;
// }
// loc1.zoneNum = loc.zoneNum + 1;
/// output.collect(loc1, p);
}
return;
} else if (loc.zoneNum == numZones - 1) {
/* copy the object to the bottom neighbor */
if (value.dec >= zoneRanges[zoneNum][0] && value.dec <= zoneRanges[zoneNum][0] + theta) {
/* raNum of objects in zone zoneNum - 1 is always 0,
* we need to recalculate it. */
loc1.raNum = BlockIDWritable.ra2Num(value.ra);
loc1.zoneNum = loc.zoneNum - 1;
output.collect(loc1, p);
/* copy the object to the right bottom neighbor */
while (value.ra >= blockRanges[loc1.raNum][1] - maxAlphas[zoneNum]
&& value.ra <= blockRanges[loc1.raNum][1]) {
loc1.raNum++;
if (loc1.raNum == numBlocks) {
loc1.raNum = 0;
value.ra -= 360;
}
loc1.zoneNum = loc.zoneNum - 1;
output.collect(loc1, p);
}
}
return;
}
boolean wrap = false;
loc1.raNum = loc.raNum;
/* copy the object to the right neighbor */
while (value.ra >= blockRanges[loc1.raNum][1] - maxAlphas[zoneNum]
&& value.ra <= blockRanges[loc1.raNum][1]) {
loc1.raNum++;
loc1.zoneNum = loc.zoneNum;
/*
* when the object is copied to the right neighbor, we need to
* be careful. we need to convert ra and raNum if ra is close to
* 360.
*/
if (loc1.raNum == numBlocks) {
loc1.raNum = 0;
value.ra -= 360;
wrap = true;
}
output.collect(loc1, p);
/* copy the object to the right bottom neighbor */
if (value.dec >= zoneRanges[zoneNum][0] && value.dec <= zoneRanges[zoneNum][0] + theta) {
loc1.zoneNum = loc.zoneNum - 1;
output.collect(loc1, p);
}
/* copy the object to the right top neighbor */
if (value.dec >= zoneRanges[zoneNum][1] - theta && value.dec <= zoneRanges[zoneNum][1]) {
loc1.zoneNum = loc.zoneNum + 1;
output.collect(loc1, p);
}
}
if (wrap) {
value.ra += 360;
}
/* copy the object to the bottom neighbor */
if (value.dec >= zoneRanges[zoneNum][0] && value.dec <= zoneRanges[zoneNum][0] + theta) {
loc1.raNum = loc.raNum;
loc1.zoneNum = loc.zoneNum - 1;
if (loc1.zoneNum == 0) loc1.raNum = 0;
output.collect(loc1, p);
}
}