Android Open Source - Kite Evaluator Manager

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License

The source code is released under:

Apache License

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Java Source Code

/**
 * /*from   ww w  .  j  a va 2  s  . c om*/
 */
package com.efurture.kite.expression;

/**
 * @author gubaojian   email: gubaojian@163.com
 **/
public class EvaluatorManager {

    /**
     *  default math expression evaluator
     * */
    private  static Evaluator  defaultEvaluator;
  
    
     /**
    * return default math expression evaluator
    * */
    public static Evaluator getDefaultEvaluator() {
         if (defaultEvaluator == null) {
            synchronized (EvaluatorManager.class) {
                if (defaultEvaluator == null) {
                  defaultEvaluator = new Exp4jEvaluator();
                }
            }    
     }
     return defaultEvaluator;
  }

  public static void setDefaultEvaluator(Evaluator defaultEvaluator) {
    EvaluatorManager.defaultEvaluator = defaultEvaluator;
  }
}

Java Source Code List