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Dynamic scripting for the JVM

There is a newer version: 1.4.6

package org.snapscript.common;

public class LazyLoader {
   
   private LazyBuilder builder;
   private V value;
   
   public LazyLoader(LazyBuilder builder) {
      this.builder = builder;
   }
   
   public V load(K key) {
      if(value == null) {
         value = builder.create(key);
      }
      return value;
   }
}