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https://github.com/processing/processing4.git
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rename to use Dict instead of Hash, remove HTML and ODS tables
This commit is contained in:
Ben Fry
359
core/src/processing/data/StringDict.java
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359
core/src/processing/data/StringDict.java
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package processing.data;
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import java.io.*;
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import java.util.HashMap;
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import java.util.Iterator;
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import processing.core.PApplet;
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/**
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* A simple table class to use a String as a lookup for another String value.
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*/
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public class StringDict {
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/** Number of elements in the table */
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protected int count;
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protected String[] keys;
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protected String[] values;
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/** Internal implementation for faster lookups */
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private HashMap<String, Integer> indices = new HashMap<String, Integer>();
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public StringDict() {
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count = 0;
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keys = new String[10];
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values = new String[10];
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}
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/**
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* Create a new lookup pre-allocated to a specific length. This will not
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* change the size(), but is more efficient than not specifying a length.
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* Use it when you know the rough size of the thing you're creating.
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*/
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public StringDict(int length) {
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count = 0;
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keys = new String[length];
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values = new String[length];
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}
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/**
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* Read a set of entries from a Reader that has each key/value pair on
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* a single line, separated by a tab.
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*/
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public StringDict(BufferedReader reader) {
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String[] lines = PApplet.loadStrings(reader);
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keys = new String[lines.length];
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values = new String[lines.length];
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for (int i = 0; i < lines.length; i++) {
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String[] pieces = PApplet.split(lines[i], '\t');
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if (pieces.length == 2) {
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keys[count] = pieces[0];
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values[count] = pieces[1];
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count++;
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}
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}
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}
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public int size() {
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return count;
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}
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/** Remove all entries. */
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public void clear() {
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count = 0;
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}
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public String key(int index) {
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return keys[index];
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}
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protected void crop() {
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if (count != keys.length) {
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keys = PApplet.subset(keys, 0, count);
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values = PApplet.subset(values, 0, count);
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}
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}
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// /**
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// * Return the internal array being used to store the keys. Allocated but
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// * unused entries will be removed. This array should not be modified.
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// */
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// public String[] keys() {
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// crop();
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// return keys;
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// }
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public Iterable<String> keys() {
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return new Iterable<String>() {
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@Override
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public Iterator<String> iterator() {
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return new Iterator<String>() {
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int index = -1;
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public void remove() {
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removeIndex(index);
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}
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public String next() {
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return key(++index);
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}
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public boolean hasNext() {
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return index+1 < size();
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}
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};
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}
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};
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}
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/**
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* Return a copy of the internal keys array. This array can be modified.
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*/
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public String[] keyArray() {
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return keyArray(null);
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}
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public String[] keyArray(String[] outgoing) {
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if (outgoing == null || outgoing.length != count) {
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outgoing = new String[count];
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}
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System.arraycopy(keys, 0, outgoing, 0, count);
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return outgoing;
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}
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public String value(int index) {
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return values[index];
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}
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public Iterable<String> values() {
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return new Iterable<String>() {
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@Override
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public Iterator<String> iterator() {
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return new Iterator<String>() {
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int index = -1;
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public void remove() {
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removeIndex(index);
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}
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public String next() {
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return value(++index);
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}
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public boolean hasNext() {
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return index+1 < size();
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}
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};
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}
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};
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}
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/**
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* Create a new array and copy each of the values into it.
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*/
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public int[] valueArray() {
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return valueArray(null);
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}
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/**
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* Fill an already-allocated array with the values (more efficient than
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* creating a new array each time). If 'array' is null, or not the same
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* size as the number of values, a new array will be allocated and returned.
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*/
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public int[] valueArray(int[] array) {
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if (array == null || array.length != size()) {
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array = new int[count];
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}
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System.arraycopy(values, 0, array, 0, count);
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return array;
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}
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/**
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* Return a value for the specified key.
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*/
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public String get(String key) {
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int index = index(key);
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if (index == -1) return null;
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return values[index];
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}
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public void set(String key, String amount) {
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int index = index(key);
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if (index == -1) {
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create(key, amount);
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} else {
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values[index] = amount;
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}
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}
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public int index(String what) {
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Integer found = indices.get(what);
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return (found == null) ? -1 : found.intValue();
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}
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protected void create(String key, String value) {
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if (count == keys.length) {
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keys = PApplet.expand(keys);
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values = PApplet.expand(values);
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}
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indices.put(key, new Integer(count));
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keys[count] = key;
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values[count] = value;
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count++;
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}
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public void remove(String key) {
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removeIndex(index(key));
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}
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public void removeIndex(int index) {
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//System.out.println("index is " + which + " and " + keys[which]);
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indices.remove(keys[index]);
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for (int i = index; i < count-1; i++) {
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keys[i] = keys[i+1];
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values[i] = values[i+1];
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indices.put(keys[i], i);
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}
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count--;
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keys[count] = null;
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values[count] = null;
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}
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protected void swap(int a, int b) {
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String tkey = keys[a];
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String tvalue = values[a];
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keys[a] = keys[b];
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values[a] = values[b];
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keys[b] = tkey;
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values[b] = tvalue;
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indices.put(keys[a], new Integer(a));
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indices.put(keys[b], new Integer(b));
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}
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/**
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* Sort the keys alphabetically (ignoring case). Uses the value as a
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* tie-breaker (only really possible with a key that has a case change).
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*/
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public void sortKeys() {
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sortImpl(true, false);
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}
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public void sortKeysReverse() {
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sortImpl(true, true);
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}
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/**
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* Sort by values in descending order (largest value will be at [0]).
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*/
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public void sortValues() {
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sortImpl(false, false);
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}
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public void sortValuesReverse() {
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sortImpl(false, true);
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}
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protected void sortImpl(final boolean useKeys, final boolean reverse) {
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Sort s = new Sort() {
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@Override
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public int size() {
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return count;
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}
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@Override
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public float compare(int a, int b) {
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int diff = 0;
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if (useKeys) {
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diff = keys[a].compareToIgnoreCase(keys[b]);
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if (diff == 0) {
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diff = values[a].compareToIgnoreCase(values[b]);
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}
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} else { // sort values
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diff = values[a].compareToIgnoreCase(values[b]);
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if (diff == 0) {
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diff = keys[a].compareToIgnoreCase(keys[b]);
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}
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}
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return reverse ? diff : -diff;
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}
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@Override
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public void swap(int a, int b) {
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StringDict.this.swap(a, b);
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}
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};
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s.run();
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}
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/** Returns a duplicate copy of this object. */
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public StringDict copy() {
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StringDict outgoing = new StringDict(count);
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System.arraycopy(keys, 0, outgoing.keys, 0, count);
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System.arraycopy(values, 0, outgoing.values, 0, count);
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for (int i = 0; i < count; i++) {
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outgoing.indices.put(keys[i], i);
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}
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return outgoing;
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}
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/**
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* Write tab-delimited entries out to
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* @param writer
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*/
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public void write(PrintWriter writer) {
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for (int i = 0; i < count; i++) {
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writer.println(keys[i] + "\t" + values[i]);
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}
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writer.flush();
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}
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@Override
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public String toString() {
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StringBuilder sb = new StringBuilder();
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sb.append(getClass().getName() + " size= " + size() + " { ");
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for (int i = 0; i < size(); i++) {
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if (i != 0) {
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sb.append(", ");
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}
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sb.append("\"" + keys[i] + "\": " + values[i]);
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}
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sb.append(" }");
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return sb.toString();
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}
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}
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