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logic operations.

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package com.xiongyingqi.common.logic.handle;

import com.xiongyingqi.common.logic.config.constants.LogicalOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author xiongyingqi
 * @since 20171019//
 */
public abstract class LogicOperation {
  private static final Logger logger = LoggerFactory.getLogger(LogicOperation.class);

  public static boolean execute(LogicalOperation logicalOperation, boolean... result) throws HandlerException {
    if (result == null || result.length == 0) {
      return false;
    }
    switch (logicalOperation) {
      case NOT:
        return !execute(LogicalOperation.AND, result);
      case AND:
        for (boolean flag : result) {
          if (!flag) {
            return false;
          }
        }
        return true;
      case OR:
        for (boolean flag : result) {
          if (flag) {
            return true;
          }
        }
        return false;
      case XOR:
        if (result.length == 1) {
          return result[0];
        }
        boolean flag = result[0] ^ result[1];
        if (result.length >= 3) {
          for (int i = 2; i < result.length; i++) {
            flag ^= result[i];
          }
        }
        return flag;
      case XNOR:
        if (result.length == 1) {
          return result[0];
        }
        boolean flag2 = (result[0] == result[1]);
        if (result.length >= 3) {
          for (int i = 2; i < result.length; i++) {
            flag2 = (result[0] == result[i]);
            if (!flag2) {
              return false;
            }
          }
        }
        return flag2;
      default:
        logger.error("Unknown operation: {} for result: {}", logicalOperation, result);
        throw new HandlerException("Unsupport logic operation: " + logicalOperation);
    }
  }
}