Complete rewrite of shifting map code:
Added shifting set as separate public class Added "Empty" class for internal references Added shifting entry for static array reference to shifting set
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124
.idea/uiDesigner.xml
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124
.idea/uiDesigner.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="Palette2">
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<initial-values>
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<property name="text" value="Label" />
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<item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.png" removable="false" auto-create-binding="true" can-attach-label="true">
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</component>
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</project>
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3
src/com/tofvesson/collections/Empty.java
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src/com/tofvesson/collections/Empty.java
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package com.tofvesson.collections;
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final class Empty {}
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35
src/com/tofvesson/collections/ShiftingEntry.java
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35
src/com/tofvesson/collections/ShiftingEntry.java
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package com.tofvesson.collections;
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import java.util.Map;
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import static com.tofvesson.collections.ShiftingSet.empty;
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public class ShiftingEntry<K, V> implements Map.Entry<K, V>{
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private final ShiftingSet<K> keys;
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private final ShiftingSet<V> values;
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int pos;
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public ShiftingEntry(ShiftingSet<K> keys, ShiftingSet<V> values, int pos){
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this.keys = keys;
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this.values = values;
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this.pos = pos;
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}
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@Override
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public K getKey() {
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return keys.entries[pos]==empty?null:(K)keys.entries[pos];
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}
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@Override
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public V getValue() {
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return values.entries[pos]==empty?null:(V)values.entries[pos];
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}
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@Override
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public V setValue(V value) {
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V v = getValue();
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if(keys.entries[pos]!=null) values.entries[pos] = value;
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return v;
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}
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}
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package com.tofvesson.collections;
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package com.tofvesson.collections;
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import java.util.*;
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import java.util.*;
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import java.util.function.Predicate;
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import static com.tofvesson.collections.ShiftingSet.empty;
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public class ShiftingMap<K, V> implements Map<K, V> {
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public class ShiftingMap<K, V> implements Map<K, V> {
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final ShiftingSet<K> keys;
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protected final ShiftingSet<K> keys;
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final ShiftingSet<V> values;
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protected final ShiftingSet<V> values;
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final UnchangingSet<Entry<K, V>> entrySet;
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protected final ShiftingSet<Entry<K, V>> entries;
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public ShiftingMap(int maxSize, double load){
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keys = new ShiftingSet<>(maxSize, load);
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values = new ShiftingSet<>(maxSize, load);
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entries = new ShiftingSet<>(maxSize, load);
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}
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public ShiftingMap(int maxSize){
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public ShiftingMap(int maxSize){
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this(maxSize, 0.75f);
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this(maxSize, 0.75);
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}
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}
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public ShiftingMap(int maxSize, float load){
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keys = new ShiftingSet<>(maxSize, load);
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values = new ShiftingSet<>(maxSize, load);
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entrySet = new UnchangingSet<>(maxSize, load);
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}
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@Override
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@Override
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public int size() {
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public int size() {
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return keys.size();
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return keys.size();
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@Override
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@Override
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public V get(Object key) {
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public V get(Object key) {
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int i = keys.indexOf(key);
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int i = keys.indexOf(key);
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return i!=-1?(V) values.set[i]:null;
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return i!=-1?(V)values.entries[i]:null;
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}
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@Override
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public V put(K key, V value) {
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V v=null;
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int i = keys.indexOf(key);
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if(i!=-1){
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v = values.entries[i]!= empty?(V)values.entries[i]:null;
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values.entries[i] = value!=null?value:empty;
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}else{
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for(Entry e : entries) ++((ShiftingEntry)e).pos;
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entries.add(new ShiftingEntry<>(keys, values, 0));
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keys.add(key);
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values.add(value);
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}
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return v;
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}
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}
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@Override
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@Override
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public V remove(Object key) {
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public V remove(Object key) {
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int i = keys.indexOf(key);
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V v = get(key);
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if(i==-1) return null;
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if(keys.contains(key)){
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V v;
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values.entries[keys.indexOf(key)] = null;
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keys.remove(key);
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values.shift();
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values.remove(v=(V)values.set[i]);
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values.adaptLoad(-1);
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keys.remove(key);
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entries.entries[entries.size()-1] = null;
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entries.adaptLoad(-1);
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}
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return v;
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return v;
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}
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}
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@SuppressWarnings({"unchecked", "MismatchedQueryAndUpdateOfCollection"})
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@Override
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@Override
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public void putAll(Map m) {
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public void putAll(Map<? extends K, ? extends V> m) {
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ArrayList l = new ArrayList();
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keys.stream().filter(m::containsKey).forEach(k -> {
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ArrayList l1 = new ArrayList();
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put(k, m.get(k));
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m.keySet().stream().filter((k)-> this.isKey(k)&& this.isValue(m.get(k))).forEach((v)->{ l.add(v); l1.add(m.get(v)); });
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m.remove(k);
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K[] k;
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});
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V[] v;
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if(m.size()<entries.maxSize) for(Entry e : entries) ((ShiftingEntry)e).pos += m.size();
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if(l.size()!=l1.size()){
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for(int i = 0; i<m.size(); ++i) entries.add(new ShiftingEntry<>(keys, values, m.size()-i));
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if(l.size()<l1.size()){
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keys.addAll(m.keySet());
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v = (V[]) Arrays.copyOf(l1.toArray(), l.size());
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values.addAll(m.values());
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k = (K[]) l.toArray();
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}
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else{
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k = (K[]) Arrays.copyOf(l.toArray(), l1.size());
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v = (V[]) l1.toArray();
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}
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}else{
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k = (K[]) l.toArray();
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v = (V[]) l1.toArray();
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}
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keys.addAll(Arrays.asList(k));
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values.addAll(Arrays.asList(v));
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ArrayList<ShiftingEntry<K, V>> l2 = new ArrayList<>();
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for(int i = k.length-1; i>0; --i) l2.add(new ShiftingEntry<>(keys, values, i));
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entrySet.addAll(l2);
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}
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}
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@Override
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@Override
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public void clear() {
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public void clear() {
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entries.clear();
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keys.clear();
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keys.clear();
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values.clear();
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values.clear();
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entrySet.clear();
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}
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}
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@Override
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@Override
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@ -105,291 +107,6 @@ public class ShiftingMap<K, V> implements Map<K, V> {
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@Override
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@Override
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public Set<Entry<K, V>> entrySet() {
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public Set<Entry<K, V>> entrySet() {
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return entrySet;
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return entries;
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}
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@Override
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public V put(K key, V value) {
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V v = null;
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if(keys.contains(key)) v = (V) values.set[keys.indexOf(key)];
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else keys.add(key);
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values.add(value);
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return v;
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}
|
|
||||||
|
|
||||||
public boolean isKey(Object o){ try{ K k = (K) o; return true; }catch(Exception e){} return false; }
|
|
||||||
public boolean isValue(Object o){ try{ V v = (V) o; return true; }catch(Exception e){} return false; }
|
|
||||||
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Entries dynamically update as underlying sets change
|
|
||||||
* @param <K>
|
|
||||||
* @param <V>
|
|
||||||
*/
|
|
||||||
protected static class ShiftingEntry<K, V> implements Entry<K, V>{
|
|
||||||
|
|
||||||
private ShiftingSet<K> keys;
|
|
||||||
private ShiftingSet<V> values;
|
|
||||||
private int index = 0;
|
|
||||||
|
|
||||||
public ShiftingEntry(ShiftingSet<K> keys, ShiftingSet<V> values, int index){
|
|
||||||
this.keys = keys;
|
|
||||||
this.values = values;
|
|
||||||
this.index = index;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public K getKey() {
|
|
||||||
return (K) keys.set[index];
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public V getValue() {
|
|
||||||
return (V) values.set[index];
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public V setValue(V value) {
|
|
||||||
V v=getValue();
|
|
||||||
values.set[index]=value;
|
|
||||||
return v;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
protected static class UnchangingSet<E> extends ShiftingSet<E>{
|
|
||||||
|
|
||||||
public UnchangingSet(int maxSize, float loadFactor) {
|
|
||||||
super(maxSize, loadFactor);
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean remove(Object o1) {
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean retainAll(Collection<?> c) {
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean removeAll(Collection<?> c) {
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean removeIf(Predicate<? super E> filter) {
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
protected static class ShiftingSet<E> implements Set<E>{
|
|
||||||
|
|
||||||
Object[] set = new Object[1];
|
|
||||||
final int maxSize;
|
|
||||||
final float loadFactor;
|
|
||||||
int populatedEntries = 0, load = 1; // Defines currently populated entries
|
|
||||||
double avgLoad = 1; // Used to optimize allocation algorithm to -
|
|
||||||
// most adequately fit the average amount of elements
|
|
||||||
// stored during any one operation
|
|
||||||
|
|
||||||
public ShiftingSet(int maxSize, float loadFactor){
|
|
||||||
this.maxSize = maxSize<=0?20:maxSize;
|
|
||||||
this.loadFactor = loadFactor<=0.1?0.75f:loadFactor;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public int size() {
|
|
||||||
return set.length;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean isEmpty() {
|
|
||||||
return set.length==1 && set[0]==null;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean contains(Object o) {
|
|
||||||
if(o==null) return false;
|
|
||||||
for(Object o1 : set)
|
|
||||||
if(o.equals(o1))
|
|
||||||
return true;
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public Iterator<E> iterator() {
|
|
||||||
return new ShiftingIterator<>(this);
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public Object[] toArray() {
|
|
||||||
return set;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public <T> T[] toArray(T[] a) {
|
|
||||||
return (T[]) set;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean add(E e) {
|
|
||||||
if(contains(e)) return false;
|
|
||||||
++load;
|
|
||||||
avgLoad = (avgLoad+1)/2;
|
|
||||||
populatedEntries=populatedEntries<maxSize?populatedEntries+1:populatedEntries;
|
|
||||||
Object[] o = new Object[Math.min((int)(100/(100/(populatedEntries+avgLoad)*loadFactor)), maxSize)]; // Dynamically update array size according to loadFactor and max Size
|
|
||||||
System.arraycopy(set, 0, o, 1, o.length!=maxSize?populatedEntries:populatedEntries-1);
|
|
||||||
o[0] = e;
|
|
||||||
set = o;
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean remove(Object o1) {
|
|
||||||
boolean b = false;
|
|
||||||
for(int i = 0; i<populatedEntries; ++i) if(o1.equals(set[i])){ set[i] = null; b = true; --populatedEntries; break; }
|
|
||||||
adaptLoad();
|
|
||||||
shift();
|
|
||||||
return b;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean containsAll(Collection<?> c) {
|
|
||||||
int i = 0;
|
|
||||||
int j = 0;
|
|
||||||
for(Object o : c) {
|
|
||||||
++j;
|
|
||||||
for (Object o1 : set)
|
|
||||||
if (o.equals(o1)) ++i;
|
|
||||||
}
|
|
||||||
return j==i;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean addAll(Collection<? extends E> c) {
|
|
||||||
ArrayList<Object> l = new ArrayList<>();
|
|
||||||
for(Object e : c)
|
|
||||||
for (Object o : set) {
|
|
||||||
if (e.equals(o)){
|
|
||||||
l.remove(e);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
l.add(e);
|
|
||||||
}
|
|
||||||
if(l.size()==0) return false;
|
|
||||||
++load;
|
|
||||||
avgLoad = (avgLoad+l.size()*avgLoad/load)/2; // Improve prediction using relative applied load (to a point)
|
|
||||||
int tmp = populatedEntries, cal;
|
|
||||||
populatedEntries=populatedEntries+l.size()<maxSize?populatedEntries+l.size():maxSize;
|
|
||||||
cal = (int) (100 / (100 / (populatedEntries + avgLoad) * loadFactor));
|
|
||||||
if(populatedEntries==tmp){ // Just use the pre-allocated space determined by the load factor
|
|
||||||
System.arraycopy(set, 0, set, l.size(), set.length-l.size());
|
|
||||||
System.arraycopy(l.toArray(), 0, set, 0, l.size()-1);
|
|
||||||
} else {
|
|
||||||
Object[] o = new Object[cal>=maxSize?maxSize:cal]; // Create new array
|
|
||||||
for (int i = l.size(); i > 0; --i)
|
|
||||||
if (i < o.length - 1)
|
|
||||||
o[l.size() - i] = l.get(i); // Move new values to start of array relative to their position
|
|
||||||
if (l.size() < tmp) for (int i = 0; i < tmp - l.size(); ++i)
|
|
||||||
if (l.size() + i < o.length) o[l.size()] = set[i]; // Move old values to relative location
|
|
||||||
set = o; // Update reference
|
|
||||||
}
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean retainAll(Collection<?> c) {
|
|
||||||
ArrayList<Object> l = new ArrayList<>();
|
|
||||||
for(Object e : c)
|
|
||||||
for (Object o : set)
|
|
||||||
if (e.equals(o)){
|
|
||||||
l.add(e);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
if(l.size() == 0 || set.length == l.size()) return false;
|
|
||||||
clear();
|
|
||||||
addAll((Collection<? extends E>) c);
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean removeAll(Collection<?> c) {
|
|
||||||
int i = 0; // Tracker for how many entries were removed
|
|
||||||
for(Object o : c) // Check against every element to remove
|
|
||||||
for(int j = 0; j<populatedEntries; ++j) // Check again all populated entries
|
|
||||||
if(o.equals(set[j])){
|
|
||||||
++i;
|
|
||||||
set[j] = null;
|
|
||||||
}
|
|
||||||
if(i==0) return false;
|
|
||||||
shift();
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public void clear() {
|
|
||||||
populatedEntries = 0;
|
|
||||||
set = new Object[1];
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Shifts the values to fill unpopulated array slots.
|
|
||||||
*/
|
|
||||||
void shift(){
|
|
||||||
for(int i = 0; i<populatedEntries; ++i) if(set[i]==null) System.arraycopy(set,i+1,set,i,populatedEntries-i);// Shift populated slots towards the start of the array
|
|
||||||
for(int i = populatedEntries; i<set.length; ++i) set[i] = null; // Remove accidental redundancies created when shifting
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Adapt array size according to populated elements and load factor.
|
|
||||||
*/
|
|
||||||
void adaptLoad(){
|
|
||||||
if(((int)(100/(100/(populatedEntries+avgLoad)*loadFactor)))>=set.length &&
|
|
||||||
((int)(100/(100/populatedEntries+(avgLoad/2)*loadFactor)))<=set.length) return; // Array is roughly the right size
|
|
||||||
Object[] o = new Object[Math.min((int)(100/(100/populatedEntries*loadFactor)), maxSize)];
|
|
||||||
System.arraycopy(set, 0, o, 0, o.length);
|
|
||||||
set = o;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Reset prediction algorithm judgement.
|
|
||||||
* (Makes newly stored values more valuable when accounting for free space)
|
|
||||||
*/
|
|
||||||
public void resetLoadCount(){ load = 0; }
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Reset whole prediction algorithm.
|
|
||||||
* May cause RAM to suffer at the expense of better processing times.
|
|
||||||
*/
|
|
||||||
public void resetLoadAlgo(){ load = 0; avgLoad = 2; }
|
|
||||||
|
|
||||||
|
|
||||||
public int indexOf(Object o){
|
|
||||||
for(int i = 0; i<populatedEntries; ++i)
|
|
||||||
if(o.equals(set[i])) return i;
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
protected static class ShiftingIterator<E> implements Iterator<E>{
|
|
||||||
|
|
||||||
private final ShiftingSet<E> s;
|
|
||||||
private int ctr = -1;
|
|
||||||
|
|
||||||
public ShiftingIterator(ShiftingSet<E> s){
|
|
||||||
this.s=s;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean hasNext() {
|
|
||||||
return ctr+1<=s.set.length-1;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public E next() {
|
|
||||||
if(!hasNext()) return null;
|
|
||||||
return (E) s.set[++ctr];
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
217
src/com/tofvesson/collections/ShiftingSet.java
Normal file
217
src/com/tofvesson/collections/ShiftingSet.java
Normal file
@ -0,0 +1,217 @@
|
|||||||
|
package com.tofvesson.collections;
|
||||||
|
|
||||||
|
import java.util.ArrayList;
|
||||||
|
import java.util.Collection;
|
||||||
|
import java.util.Set;
|
||||||
|
|
||||||
|
public class ShiftingSet<E> implements Set<E> {
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Holder for entries. Dur to reasons, the array holds objects.
|
||||||
|
*/
|
||||||
|
Object[] entries;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Populated entries.
|
||||||
|
*/
|
||||||
|
int pop = 0;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Maximum size of set.
|
||||||
|
*/
|
||||||
|
final int maxSize;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Load factor used when calculating how to resize array.
|
||||||
|
*/
|
||||||
|
double load;
|
||||||
|
|
||||||
|
static final Empty empty = new Empty();
|
||||||
|
|
||||||
|
public ShiftingSet(int maxSize, double load){
|
||||||
|
this.maxSize = maxSize>1?20:maxSize;
|
||||||
|
this.load = load>1||load<0.1?0.75:load;
|
||||||
|
entries = new Object[1];
|
||||||
|
}
|
||||||
|
|
||||||
|
public ShiftingSet(int maxSize){
|
||||||
|
this(maxSize, 0.75);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public int size() {
|
||||||
|
return pop;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean isEmpty() {
|
||||||
|
return pop==0;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean contains(Object o) {
|
||||||
|
if(o==empty) return false;
|
||||||
|
for(Object o1 : entries) if(o.equals(o1)) return true;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public Iterator<E> iterator() {
|
||||||
|
return new Iterator<>();
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public Object[] toArray() {
|
||||||
|
Object[] o = new Object[pop];
|
||||||
|
System.arraycopy(entries, 0, o, 0, pop);
|
||||||
|
return o;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public <T> T[] toArray(T[] a) {
|
||||||
|
for(int i = 0; i<Math.min(pop, a.length); ++i) a[i] = (T) entries[i];
|
||||||
|
return a;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean add(E e) {
|
||||||
|
preparePopulate(1);
|
||||||
|
entries[0] = e!=null?e:empty;
|
||||||
|
pop=pop!=maxSize?pop+1:pop;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean remove(Object o) {
|
||||||
|
for(int i = 0; i<pop; ++i)
|
||||||
|
if(entries[i]==o){
|
||||||
|
entries[i]=null;
|
||||||
|
shift();
|
||||||
|
adaptLoad(-1);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean containsAll(Collection<?> c) {
|
||||||
|
boolean b = true;
|
||||||
|
for(Object o : c) b &= contains(o);
|
||||||
|
return b;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean addAll(Collection<? extends E> c) {
|
||||||
|
ArrayList<? extends E> l = new ArrayList<>(c);
|
||||||
|
preparePopulate(c.size());
|
||||||
|
for(int i = 0; i<Math.min(entries.length, c.size()); ++i) entries[i] = l.get(i);
|
||||||
|
pop=Math.min(pop+c.size(), maxSize);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean retainAll(Collection<?> c) {
|
||||||
|
int removed = 0;
|
||||||
|
for(int i = 0; i<pop; ++i)
|
||||||
|
if(!c.contains(entries[i])) {
|
||||||
|
entries[i] = null;
|
||||||
|
++removed;
|
||||||
|
}
|
||||||
|
if(removed==0) return false;
|
||||||
|
shift();
|
||||||
|
adaptLoad(-removed);
|
||||||
|
pop -= removed;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean removeAll(Collection<?> c) {
|
||||||
|
int removed = 0;
|
||||||
|
for(int i = 0; i<pop; ++i)
|
||||||
|
if(c.contains(entries[i])) {
|
||||||
|
entries[i] = null;
|
||||||
|
++removed;
|
||||||
|
}
|
||||||
|
if(removed==0) return false;
|
||||||
|
shift();
|
||||||
|
adaptLoad(-removed);
|
||||||
|
pop -= removed;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void clear() {
|
||||||
|
pop = 0;
|
||||||
|
entries = new Object[1];
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean equals(Object o) {
|
||||||
|
if(!(o instanceof ShiftingSet) || ((ShiftingSet) o).pop!=pop ||
|
||||||
|
((ShiftingSet) o).load!=load || ((ShiftingSet) o).maxSize!=maxSize) return false; // Check for matching parameters
|
||||||
|
for(int i = 0; i<pop; ++i) if(entries[i]!=((ShiftingSet) o).entries[i]) return false; // Check for matching data
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public int hashCode() {
|
||||||
|
int hc = 0;
|
||||||
|
for(int i = 0; i<pop; ++i) hc+=entries[i]!=null?entries[i].hashCode():0;
|
||||||
|
return hc;
|
||||||
|
}
|
||||||
|
|
||||||
|
public int indexOf(Object o){
|
||||||
|
for(int i = 0; i<pop; ++i)
|
||||||
|
if(entries[i].equals(o)) return i;
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Changes size of array to account for new entries.
|
||||||
|
* @param accountFor The amount new elements to be accounted for.
|
||||||
|
*/
|
||||||
|
protected void adaptLoad(int accountFor){
|
||||||
|
if(accountFor==0) throw new RuntimeException("Invalid load adaptation value specified!");
|
||||||
|
if(pop+accountFor<=0){
|
||||||
|
entries = new Object[1];
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
Object[] o = new Object[(int) Math.max(1, Math.min(100/(100/(pop+accountFor)*load), maxSize))]; // Load adaptation algorithm capping at maxSize or 0
|
||||||
|
System.arraycopy(entries, 0, o, 0, Math.min(o.length, entries.length)); // Move as many entries as possible
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Shift all elements towards the start of the arrays.
|
||||||
|
*/
|
||||||
|
protected void shift(){
|
||||||
|
for(int i = 0; i<pop; ++i)
|
||||||
|
if(entries[i]==null && i!=pop-1)
|
||||||
|
for(int j = i; j<pop; ++j)
|
||||||
|
if(entries[j]!=null){
|
||||||
|
entries[i] = entries[j];
|
||||||
|
entries[i] = null;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
protected void preparePopulate(int accountFor){
|
||||||
|
if(accountFor>entries.length) adaptLoad(accountFor); // If new elements exceed limit, adapt load
|
||||||
|
if(accountFor>entries.length) return; // If the expected new load still exceeds the limit, no need to delete elements
|
||||||
|
System.arraycopy(entries, 0, entries, accountFor, entries.length-accountFor); // Shift array elements to account for new elements
|
||||||
|
}
|
||||||
|
|
||||||
|
public class Iterator<E> implements java.util.Iterator<E>{
|
||||||
|
|
||||||
|
int counter = 0;
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean hasNext() {
|
||||||
|
return counter<ShiftingSet.this.pop;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public E next() {
|
||||||
|
return (E) entries[counter++];
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
x
Reference in New Issue
Block a user