processing4/core/src/processing/data/DoubleDict.java at main · processing/processing4 · GitHub

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package processing.data;

import java.io.*;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.NoSuchElementException;

import processing.core.PApplet;

/**

* A simple table class to use a String as a lookup for an double value.

* @nowebref

* @see IntDict

* @see StringDict

public class DoubleDict {

/** Number of elements in the table */

protected int count;

protected String[] keys;

protected double[] values;

/** Internal implementation for faster lookups */

private HashMap<String, Integer> indices = new HashMap<>();

public DoubleDict() {

count = 0;

keys = new String[10];

values = new double[10];

}

/**

* Create a new lookup with a specific size. This is more efficient than not

* specifying a size. Use it when you know the rough size of the thing you're creating.

* @nowebref

public DoubleDict(int length) {

count = 0;

keys = new String[length];

values = new double[length];

}

/**

* Read a set of entries from a Reader that has each key/value pair on

* a single line, separated by a tab.

* @nowebref

public DoubleDict(BufferedReader reader) {

String[] lines = PApplet.loadStrings(reader);

keys = new String[lines.length];

values = new double[lines.length];

for (int i = 0; i < lines.length; i++) {

String[] pieces = PApplet.split(lines[i], '\t');

if (pieces.length == 2) {

keys[count] = pieces[0];

values[count] = PApplet.parseFloat(pieces[1]);

indices.put(pieces[0], count);

count++;

}

/**

* @nowebref

public DoubleDict(String[] keys, double[] values) {

if (keys.length != values.length) {

throw new IllegalArgumentException("key and value arrays must be the same length");

}

this.keys = keys;

this.values = values;

count = keys.length;

for (int i = 0; i < count; i++) {

indices.put(keys[i], i);

}

/**

* Constructor to allow (more intuitive) inline initialization, e.g.:

* <pre>

* new FloatDict(new Object[][] {

* { "key1", 1 },

* { "key2", 2 }

* });

* </pre>

public DoubleDict(Object[][] pairs) {

count = pairs.length;

this.keys = new String[count];

this.values = new double[count];

for (int i = 0; i < count; i++) {

keys[i] = (String) pairs[i][0];

values[i] = (Float) pairs[i][1];

indices.put(keys[i], i);

}

public DoubleDict(Map<String, Double> incoming) {

count = incoming.size();

keys = new String[count];

values = new double[count];

int index = 0;

for (Map.Entry<String, Double> e : incoming.entrySet()) {

keys[index] = e.getKey();

values[index] = e.getValue();

indices.put(keys[index], index);

index++;

}

/**

* @webref doubledict:method

* @brief Returns the number of key/value pairs

public int size() {

return count;

}

/**

* Resize the internal data, this can only be used to shrink the list.

* Helpful for situations like sorting and then grabbing the top 50 entries.

public void resize(int length) {

if (length == count) return;

if (length > count) {

throw new IllegalArgumentException("resize() can only be used to shrink the dictionary");

}

if (length < 1) {

throw new IllegalArgumentException("resize(" + length + ") is too small, use 1 or higher");

}

String[] newKeys = new String[length];

double[] newValues = new double[length];

PApplet.arrayCopy(keys, newKeys, length);

PApplet.arrayCopy(values, newValues, length);

keys = newKeys;

values = newValues;

count = length;

resetIndices();

}

/**

* Remove all entries.

* @webref doubledict:method

* @brief Remove all entries

public void clear() {

count = 0;

indices = new HashMap<>();

}

private void resetIndices() {

indices = new HashMap<>(count);

for (int i = 0; i < count; i++) {

indices.put(keys[i], i);

}

// . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

public class Entry {

public String key;

public double value;

Entry(String key, double value) {

this.key = key;

this.value = value;

}

public Iterable<Entry> entries() {

return new Iterable<Entry>() {

public Iterator<Entry> iterator() {

return entryIterator();

}

};

}

public Iterator<Entry> entryIterator() {

return new Iterator<Entry>() {

int index = -1;

public void remove() {

removeIndex(index);

index--;

}

public Entry next() {

++index;

Entry e = new Entry(keys[index], values[index]);

return e;

}

public boolean hasNext() {

return index+1 < size();

}

};

}

// . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

public String key(int index) {

return keys[index];

}

protected void crop() {

if (count != keys.length) {

keys = PApplet.subset(keys, 0, count);

values = PApplet.subset(values, 0, count);

}

public Iterable<String> keys() {

return new Iterable<String>() {

@Override

public Iterator<String> iterator() {

return keyIterator();

}

};

}

// Use this to iterate when you want to be able to remove elements along the way

public Iterator<String> keyIterator() {

return new Iterator<String>() {

int index = -1;

public void remove() {

removeIndex(index);

index--;

}

public String next() {

return key(++index);

}

public boolean hasNext() {

return index+1 < size();

}

};

}

/**

* Return a copy of the internal keys array. This array can be modified.

* @webref doubledict:method

* @brief Return a copy of the internal keys array

public String[] keyArray() {

crop();

return keyArray(null);

}

public String[] keyArray(String[] outgoing) {

if (outgoing == null || outgoing.length != count) {

outgoing = new String[count];

}

System.arraycopy(keys, 0, outgoing, 0, count);

return outgoing;

}

public double value(int index) {

return values[index];

}

/**

* @webref doubledict:method

* @brief Return the internal array being used to store the values

public Iterable<Double> values() {

return new Iterable<Double>() {

@Override

public Iterator<Double> iterator() {

return valueIterator();

}

};

}

public Iterator<Double> valueIterator() {

return new Iterator<Double>() {

int index = -1;

public void remove() {

removeIndex(index);

index--;

}

public Double next() {

return value(++index);

}

public boolean hasNext() {

return index+1 < size();

}

};

}

/**

* Create a new array and copy each of the values into it.

* @webref doubledict:method

* @brief Create a new array and copy each of the values into it

public double[] valueArray() {

crop();

return valueArray(null);

}

/**

* Fill an already-allocated array with the values (more efficient than

* creating a new array each time). If 'array' is null, or not the same

* size as the number of values, a new array will be allocated and returned.

public double[] valueArray(double[] array) {

if (array == null || array.length != size()) {

array = new double[count];

}

System.arraycopy(values, 0, array, 0, count);

return array;

}

/**

* Return a value for the specified key.

* @webref doubledict:method

* @brief Return a value for the specified key

public double get(String key) {

int index = index(key);

if (index == -1) {

throw new IllegalArgumentException("No key named '" + key + "'");

}

return values[index];

}

public double get(String key, double alternate) {

int index = index(key);

if (index == -1) {

return alternate;

}

return values[index];

}

/**

* @webref doubledict:method

* @brief Create a new key/value pair or change the value of one

public void set(String key, double amount) {

int index = index(key);

if (index == -1) {

create(key, amount);

} else {

values[index] = amount;

}

public void setIndex(int index, String key, double value) {

if (index < 0 || index >= count) {

throw new ArrayIndexOutOfBoundsException(index);

}

keys[index] = key;

values[index] = value;

}

/**

* @webref doubledict:method

* @brief Check if a key is a part of the data structure

public boolean hasKey(String key) {

return index(key) != -1;

}

/**

* @webref doubledict:method

* @brief Add to a value

public void add(String key, double amount) {

int index = index(key);

if (index == -1) {

create(key, amount);

} else {

values[index] += amount;

}

/**

* @webref doubledict:method

* @brief Subtract from a value

public void sub(String key, double amount) {

add(key, -amount);

}

/**

* @webref doubledict:method

* @brief Multiply a value

public void mult(String key, double amount) {

int index = index(key);

if (index != -1) {

values[index] *= amount;

}

/**

* @webref doubledict:method

* @brief Divide a value

public void div(String key, double amount) {

int index = index(key);

if (index != -1) {

values[index] /= amount;

}

private void checkMinMax(String functionName) {

if (count == 0) {

String msg =

String.format("Cannot use %s() on an empty %s.",

functionName, getClass().getSimpleName());

throw new RuntimeException(msg);

}

/**

* @webref doublelist:method

* @brief Return the smallest value

public int minIndex() {

//checkMinMax("minIndex");

if (count == 0) return -1;

// Will still return NaN if there are 1 or more entries, and they're all NaN

double m = Float.NaN;

int mi = -1;

for (int i = 0; i < count; i++) {

// find one good value to start

if (values[i] == values[i]) {

m = values[i];

mi = i;

// calculate the rest

for (int j = i+1; j < count; j++) {

double d = values[j];

if ((d == d) && (d < m)) {

m = values[j];

mi = j;

}

break;

}

return mi;

}

// return the key for the minimum value

public String minKey() {

checkMinMax("minKey");

int index = minIndex();

if (index == -1) {

return null;

}

return keys[index];

}

// return the minimum value, or throw an error if there are no values

public double minValue() {

checkMinMax("minValue");

int index = minIndex();

if (index == -1) {

return Float.NaN;

}

return values[index];

}

/**

* @webref doublelist:method

* @brief Return the largest value

// The index of the entry that has the max value. Reference above is incorrect.

public int maxIndex() {

//checkMinMax("maxIndex");

if (count == 0) {

return -1;

}

// Will still return NaN if there is 1 or more entries, and they're all NaN

double m = Double.NaN;

int mi = -1;

for (int i = 0; i < count; i++) {

// find one good value to start

if (values[i] == values[i]) {

m = values[i];

mi = i;

// calculate the rest

for (int j = i+1; j < count; j++) {

double d = values[j];

if (!Double.isNaN(d) && (d > m)) {

m = values[j];

mi = j;

}

break;

}

return mi;

}

/** The key for a max value; null if empty or everything is NaN (no max). */

public String maxKey() {

//checkMinMax("maxKey");

int index = maxIndex();

if (index == -1) {

return null;

}

return keys[index];

}

/** The max value. (Or NaN if no entries or they're all NaN.) */

public double maxValue() {

//checkMinMax("maxValue");

int index = maxIndex();

if (index == -1) {

return Float.NaN;

}

return values[index];

}

public double sum() {

double sum = 0;

for (int i = 0; i < count; i++) {

sum += values[i];

}

return sum;

}

public int index(String what) {

Integer found = indices.get(what);

return (found == null) ? -1 : found.intValue();

}

protected void create(String what, double much) {

if (count == keys.length) {

keys = PApplet.expand(keys);

values = PApplet.expand(values);

}

indices.put(what, Integer.valueOf(count));

keys[count] = what;

values[count] = much;

count++;

}

/**

* @webref doubledict:method

* @brief Remove a key/value pair

public double remove(String key) {

int index = index(key);

if (index == -1) {

throw new NoSuchElementException("'" + key + "' not found");

}

double value = values[index];

removeIndex(index);

return value;

}

public double removeIndex(int index) {

if (index < 0 || index >= count) {

throw new ArrayIndexOutOfBoundsException(index);

}

double value = values[index];

indices.remove(keys[index]);

for (int i = index; i < count-1; i++) {

keys[i] = keys[i+1];

values[i] = values[i+1];

indices.put(keys[i], i);

}

count--;

keys[count] = null;

values[count] = 0;

return value;

}

public void swap(int a, int b) {

String tkey = keys[a];

double tvalue = values[a];

keys[a] = keys[b];

values[a] = values[b];

keys[b] = tkey;

values[b] = tvalue;

// indices.put(keys[a], Integer.valueOf(a));

// indices.put(keys[b], Integer.valueOf(b));

}

/**

* Sort the keys alphabetically (ignoring case). Uses the value as a

* tie-breaker (only really possible with a key that has a case change).

* @webref doubledict:method

* @brief Sort the keys alphabetically

public void sortKeys() {

sortImpl(true, false, true);

}

/**

* @webref doubledict:method

* @brief Sort the keys alphabetically in reverse

public void sortKeysReverse() {

sortImpl(true, true, true);

}

/**

* Sort by values in descending order (largest value will be at [0]).

* @webref doubledict:method

* @brief Sort by values in ascending order

public void sortValues() {

sortValues(true);

}

/**

* Set true to ensure that the order returned is identical. Slightly

* slower because the tie-breaker for identical values compares the keys.

* @param stable

public void sortValues(boolean stable) {

sortImpl(false, false, stable);

}

/**

* @webref doubledict:method

* @brief Sort by values in descending order

public void sortValuesReverse() {

sortValuesReverse(true);

}

public void sortValuesReverse(boolean stable) {

sortImpl(false, true, stable);

}

protected void sortImpl(final boolean useKeys, final boolean reverse,

final boolean stable) {

Sort s = new Sort() {

@Override

public int size() {

if (useKeys) {

return count; // don't worry about NaN values

} else if (count == 0) { // skip the NaN check, it'll AIOOBE

return 0;

} else { // first move NaN values to the end of the list

int right = count - 1;

while (values[right] != values[right]) {

right--;

if (right == -1) {

return 0; // all values are NaN

}

for (int i = right; i >= 0; --i) {

if (Double.isNaN(values[i])) {

swap(i, right);

--right;

}

return right + 1;

}

@Override

public int compare(int a, int b) {

double diff = 0;

if (useKeys) {

diff = keys[a].compareToIgnoreCase(keys[b]);

if (diff == 0) {

diff = values[a] - values[b];

}

} else { // sort values

diff = values[a] - values[b];

if (diff == 0 && stable) {

diff = keys[a].compareToIgnoreCase(keys[b]);

}

if (diff == 0) {

return 0;

} else if (reverse) {

return diff < 0 ? 1 : -1;

} else {

return diff < 0 ? -1 : 1;

}

@Override

public void swap(int a, int b) {

DoubleDict.this.swap(a, b);

}

};

s.run();

// Set the indices after sort/swaps (performance fix 160411)

resetIndices();

}

/**

* Sum all of the values in this dictionary, then return a new FloatDict of

* each key, divided by the total sum. The total for all values will be ~1.0.

* @return a FloatDict with the original keys, mapped to their pct of the total

public DoubleDict getPercent() {

double sum = sum();

DoubleDict outgoing = new DoubleDict();

for (int i = 0; i < size(); i++) {

double percent = value(i) / sum;

outgoing.set(key(i), percent);

}

return outgoing;

}

/** Returns a duplicate copy of this object. */

public DoubleDict copy() {

DoubleDict outgoing = new DoubleDict(count);

System.arraycopy(keys, 0, outgoing.keys, 0, count);

System.arraycopy(values, 0, outgoing.values, 0, count);

for (int i = 0; i < count; i++) {

outgoing.indices.put(keys[i], i);

}

outgoing.count = count;

return outgoing;

}

public void print() {

for (int i = 0; i < size(); i++) {

System.out.println(keys[i] + " = " + values[i]);

}

/**

* Save tab-delimited entries to a file (TSV format, UTF-8 encoding)

public void save(File file) {

PrintWriter writer = PApplet.createWriter(file);

write(writer);

writer.close();

}

/**

* Write tab-delimited entries out to

* @param writer

public void write(PrintWriter writer) {

for (int i = 0; i < count; i++) {

writer.println(keys[i] + "\t" + values[i]);

}

writer.flush();

}

/**

* Return this dictionary as a String in JSON format.

public String toJSON() {

StringList items = new StringList();

for (int i = 0; i < count; i++) {

items.append(JSONObject.quote(keys[i])+ ": " + values[i]);

}

return "{ " + items.join(", ") + " }";

}

@Override

public String toString() {

return getClass().getSimpleName() + " size=" + size() + " " + toJSON();

}

processing4/core/src/processing/data/DoubleDict.java at main · processing/processing4 · GitHub

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