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changed arraylist to concurrent set and removed snychronized

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NoName11234 2024-04-25 19:17:12 +02:00
parent 10096cbaeb
commit cf8653567c
1 changed files with 3 additions and 6 deletions
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9
src/main/java/de/dhbwstuttgart/typeinference/unify/model/PlaceholderType.java
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@ -1,13 +1,10 @@
package de.dhbwstuttgart.typeinference.unify.model;
import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Random;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import de.dhbwstuttgart.typeinference.unify.distributeVariance;
import de.dhbwstuttgart.typeinference.unify.interfaces.IFiniteClosure;
@ -23,7 +20,7 @@ public final class PlaceholderType extends UnifyType{
* Static list containing the names of all existing placeholders.
* Used for generating fresh placeholders.
*/
public static final ArrayList<String> EXISTING_PLACEHOLDERS = new ArrayList<String>();
public static final Set<String> EXISTING_PLACEHOLDERS = ConcurrentHashMap.newKeySet();
/**
* Prefix of auto-generated placeholder names.
@ -96,7 +93,7 @@ public final class PlaceholderType extends UnifyType{
* A user could later instantiate a type using the same name that is equivalent to this type.
* @return A fresh placeholder type.
*/
public synchronized static PlaceholderType freshPlaceholder() {
public static PlaceholderType freshPlaceholder() {
String name = nextName + (char) (rnd.nextInt(22) + 97); // Returns random char between 'a' and 'z'
// Add random chars while the name is in use.
while(EXISTING_PLACEHOLDERS.contains(name)) {