I lifted a Numeric Filter from here,
but it isn't quite what I need, it will not allow the input of a single Decimal point,
This filter looks like this
DocumentFilter numericFilter = new DocumentFilter(){
#Override
public void insertString(DocumentFilter.FilterBypass fb, int offset,
String string, AttributeSet attr)
throws BadLocationException {
fb.insertString(offset, string.replaceAll("[^\\d]", ""), attr);
}
#Override
public void replace(DocumentFilter.FilterBypass fb, int offset, int length,
String text, AttributeSet attrs)
throws BadLocationException {
fb.replace(offset, length, text.replaceAll("[^\\d]", ""), attrs);
}
};
How can I alter this so it will allow the single inclusion of a decimal point?
thanks,
Phil
Related
What is the Net Standard Library for Plugin.GoogleAnalytics? I'm converting Portable Class Libraries to Net Standard ones, couldn't find the equivalent of this package.
Below is the IAnalytics interface for this library.
void SendEvent(string category, string action, string label, long value);
void SendEvent(string category, string action, string label, int value);
void SendEvent(string category, string action, string label);
void SendEvent(string category, string action);
void SendException(string description, bool isFatal);
void SendException(Exception exception, bool isFatal);
void SendView(string screenName);
void SetEndSession(bool value);
void SetStartSession(bool value);
I am a hadoop newbie.
I want to get a partition number on output file.
At first, I made a customized partitioner.
public static class MyPartitioner extends Partitioner<Text, LongWritable> {
public int getPartition(Text key, LongWritable value, int numReduceTasks) {
int numOfChars = key.toString().length();
return numOfChars % numReduceTasks;
}
}
It works. But, I want to output partition numbers 'visually' on Reducer.
How can I get a partiton number ??
Below is my reducer source.
public static class MyReducer extends Reducer<Text, LongWritable, Text, Text>{
private Text textList = new Text();
public void reduce(Text key, Iterable<LongWritable> values, Context context)
throws IOException, InterruptedException {
String list = new String();
for(LongWritable value: values) {
list = new String(list + "\t" + value.toString());
}
textList.set(list);
context.write(key, textList);
}
}
I want to put a partition number on 'list' respectively. There will be '0' or '1'.
list = new String(list + "\t" + value.toString() + "\t" + ??);
It would be great if someone helps me.
+
Thanks to the answer, I got a solution. But, It didn't work and I think I did something wrong.
Below is the modified MyPartitioner.
public static class MyPartitioner extends Partitioner {
public int getPartition(Text key, LongWritable value, int numReduceTasks) {
int numOfChars = key.toString().length();
return numOfChars % numReduceTasks;
private int bring_num = 0;
public void configure(JobConf job) {
bring_num = jobConf.getInt(numOfChars & numReduceTasks);
}
}
}
Add the below code to the Reducer class to get the partition number in a class variable which can be later used in the reducer method.
String partition;
protected void setup(Context context) throws IOException,
InterruptedException {
Configuration conf = context.getConfiguration();
partition = conf.get("mapred.task.partition");
}
I am new to Hadoop and Java. My mapper outputs text and Arraywritable. I having trouble to read ArrayWritable values. Unbale to cast .get() values to integer. Mapper and reducer code are attached. Can someone please help me to correct my reducer code in order to read ArrayWritable values?
public static class Temp2Mapper extends Mapper<LongWritable, Text, Text, ArrayWritable>{
private static final int MISSING=9999;
#Override public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException{
String line = value.toString();
String date = line.substring(07,14);
int maxTemp,minTemp,avgTemp;
IntArrayWritable carrier = new IntArrayWritable();
IntWritable innercarrier[] = new IntWritable[3];
maxTemp=Integer.parseInt(line.substring(39,45));
minTemp=Integer.parseInt(line.substring(47,53));
avgTemp=Integer.parseInt(line.substring(63,69));
if (maxTemp!= MISSING)
innercarrier[0]=new IntWritable(maxTemp); // maximum Temperature
if (minTemp!= MISSING)
innercarrier[1]=new IntWritable(minTemp); //minimum temperature
if (avgTemp!= MISSING)
innercarrier[2]=new IntWritable(avgTemp); // average temperature of 24 hours
carrier.set(innercarrier);
context.write(new Text(date), carrier); // Output Text and ArrayWritable
}
}
public static class Temp2Reducer
extends Reducer<Text, ArrayWritable, Text, IntWritable>{
#Override public void reduce(Text key, Iterable<ArrayWritable> values, Context context )
throws IOException, InterruptedException {
int max = Integer.MIN_VALUE;
int[] arr= new int[3];
for (ArrayWritable val : values) {
arr = (Int) val.get(); // Error: cannot cast Writable to int
max = Math.max(max, arr[0]);
}
context.write( key, new IntWritable(max) );
}
}
ArrayWritable#get method returns an array of Writable.
You can't cast an array of Writable to int. What you can do is:
iterate over this array
cast each item (which will be of type Writable) of the array to IntWritable
use IntWritable#get method to get the int value.
for (ArrayWritable val: values) {
for (Writable writable: val.get()) { // iterate
IntWritable intWritable = (IntWritable)writable; // cast
int value = intWritable.get(); // get
// do your thing with int value
}
}
I have this Class:
public class Stripe implements WritableComparable<Stripe>{
private List<Term> occorrenze = new ArrayList<Term>();
public Stripe(){}
#Override
public void readFields(DataInput in) throws IOException {
}
}
public class Term implements WritableComparable<Term> {
private Text key;
private IntWritable frequency;
#Override
public void readFields(DataInput in) throws IOException {
this.key.readFields(in);
this.frequency.readFields(in);
}
Stripe is a List of Term (pair of Text and intWritable).
how can I set the method "readField" for read the complex type Stripe from DataInput?
To serialize an list you'll need to write out the length of the list, followed by the elements themselves. A simple readFields / write method pair for Stripe could be:
#Override
public void readFields(DataInput in) throws IOException {
occorrenze.clear();
int cnt = in.readInt();
for (int x = 0; x < cnt; x++) {
Term term = new Term();
term.readFields(in);
occorrence.add(term);
}
}
#Override
public void write(DataOutput out) throws IOException {
out.writeInt(occorrenze.size());
for (Term term : occorrenze) {
term.write(out);
}
}
You could make this more efficient by using a VInt rather than an int, and by using a pool of Terms which can be re-used to save on object creation / garbage collection in the readFields method
You could use ArrayWritable which is a list of writables of the same type.
I'm learning about delegates and think I may have found a use for one. Basically what I have is a series of string properties that take in a minimum value and a maximum value, like so:
string weightInvalid(min as int32, max as int32)
There are several messages like this, all with unique messages but all sharing the same signature of minimum and maximum. I think that a delegate could be used here, but how would I go about doing so? It would really help me to see some code so I could get a grasp on this delegate stuff.
Below is a simple Console application example that may help...
public delegate string foo(int min, int max);
class Program
{
static void Main(string[] args)
{
CallFoo(foo1);
CallFoo(foo2);
CallFoo(foo3);
Console.WriteLine("Press ENTER to exit...");
Console.ReadLine();
}
private static void CallFoo(foo foo)
{
Console.WriteLine(foo(1, 2));
}
private static string foo1(int min, int max)
{
return "foo1";
}
private static string foo2(int min, int max)
{
return "foo2";
}
private static string foo3(int min, int max)
{
return "foo3";
}
on c#:
delegate string weightInvalid(int min, int max);
string MyWeightInvalid(int min, int max)
{
return "";
}
string SomeMethod()
{
weightInvalid myFunc = new weightInvalid(MyWeightInvalid);
return myFunc(0, 1);
}