package com.github.mygreen.cellformatter;
   
   
   /**
    * ユーザ定義の条件式を表現するクラス。
    * 演算子の条件式{@literal <、>、>=、<=、<>}を表現する。
    *
    * @author T.TSUCHIE
    *
   */
  public abstract class ConditionOperator {
      
      /**
       * 全ての値に一致する条件。常にtrueを返す。
       */
      public static ConditionOperatorditionOperator.html#ConditionOperator">ConditionOperator ALL = new ConditionOperator() {
          
          @Override
          public boolean isMatch(final double value) {
              return true;
          }
          
      };
      
      /**
       * 正の値に一致する条件。{@literal (>0.0)}
       */
      public static ConditionOperator POSITIVE = new GreaterThan(0.0);
      
      /**
       * 負の値に一致する条件{@literal （<0.0）}
       */
      public static ConditionOperator NEGATIVE = new LessThan(0.0);
      
      /**
       * ゼロの値に一致する条件{@literal （=0.0）}
       */
      public static ConditionOperator ZERO = new Equal(0.0);
      
      /**
       * ゼロ以上の値に一致する条件（非負の数）{@literal （>= 0.0）}
       */
      public static ConditionOperator NON_NEGATIVE = new GreaterEqual(0.0);
      
      /**
       * 指定した値が条件に一致するかどうか。
       * @param value
       * @return
       */
      public abstract boolean isMatch(double value);
      
      /**
       * 等しい{@literal (=条件値)}かどうか。
       */
      public static class Equal extends ConditionOperator{
          
          private final double condition;
          
          public Equal(final double condition) {
              this.condition = condition;
          }
          
          @Override
          public boolean isMatch(final double value) {
              return value == condition;
          }
          
          public double getConditionValue() {
              return condition;
          }
          
      }
      
      /**
       * 等しいくない{@literal (<>条件値)}かどうか。
       */
      public static class NotEqual extends ConditionOperator{
          
          private final double condition;
          
          public NotEqual(final double condition) {
              this.condition = condition;
          }
          
          @Override
          public boolean isMatch(final double value) {
              return value != condition;
          }
          
          public double getConditionValue() {
              return condition;
          }
          
      }
      
      /**
       * より大きい{@literal （>条件値）}
       */
      public static class GreaterThan extends ConditionOperator{
         
         private final double condition;
         
         public GreaterThan(final double condition) {
             this.condition = condition;
         }
         
         @Override
         public boolean isMatch(final double value) {
             return value > condition;
         }
         
         public double getConditionValue() {
             return condition;
         }
         
     }
     
     /**
      * より小さい{@literal （<条件値）}
      */
     public static class LessThan extends ConditionOperator{
         
         private final double condition;
         
         public LessThan(final double condition) {
             this.condition = condition;
         }
         
         @Override
         public boolean isMatch(final double value) {
             return value < condition;
         }
         
         public double getConditionValue() {
             return condition;
         }
         
     }
     
     /**
      * 以上{@literal （>=条件値）}
      */
     public static class GreaterEqual extends ConditionOperator{
         
         private final double condition;
         
         public GreaterEqual(final double condition) {
             this.condition = condition;
         }
         
         @Override
         public boolean isMatch(final double value) {
             return value >= condition;
         }
         
         public double getConditionValue() {
             return condition;
         }
         
     }
     
     /**
      * 以下{@literal （<=条件値）}
      */
     public static class LessEqual extends ConditionOperator{
         
         private final double condition;
         
         public LessEqual(final double condition) {
             this.condition = condition;
         }
         
         @Override
         public boolean isMatch(final double value) {
             return value <= condition;
         }
         
         public double getConditionValue() {
             return condition;
         }
         
     }
     
 }