STEP4: 按钮逻辑是组合条件，必须所有条件 conditions 都满足才算测试通过，返回 Result ； 否则交由下一个条件逻辑配置处理。

package zzz.study.patterns.composite.button;

import com.alibaba.fastjson.JSON;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import lombok.Data;

@Data
public class MultiCondition implements ICondition {

  private List<BaseCondition> conditions;
  private Boolean result;

  public MultiCondition() {
    this.conditions = new ArrayList<>();
    this.result = false;
  }

  public MultiCondition(List<BaseCondition> conditions, Boolean result) {
    this.conditions = conditions;
    this.result = result;
  }

  public static MultiCondition getInstance(String configJson) {
    return JSON.parseObject(configJson, MultiCondition.class);
  }

  @Override
  public boolean satisfiedBy(Map<String, Object> valueMap) {
    for (BaseCondition bc: conditions) {
      if (!bc.test(valueMap)) {
        return false;
      }
    }
    return true;
  }
}

STEP5: 按钮逻辑配置的抽象：

package zzz.study.patterns.composite.button;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import lombok.Data;

@Data
public class ButtonCondition {

  private List<ICondition> buttonRules;

  private Boolean defaultResult;

  public ButtonCondition() {
    this.buttonRules = new ArrayList<>();
    this.defaultResult = false;
  }

  public ButtonCondition(List<ICondition> matches, Boolean defaultResult) {
    this.buttonRules = matches;
    this.defaultResult = defaultResult;
  }

  public static ButtonCondition getInstance(String configJson) {
    Map<String, Object> configMap = JSON.parseObject(configJson);
    Boolean result = ((JSONObject) configMap).getBoolean("defaultResult");
    JSONArray conditions = ((JSONObject) configMap).getJSONArray("buttonRules");
    List<ICondition> allConditions = new ArrayList<>();
    for (int i=0; i < conditions.size(); i++) {
      Map condition = (Map) conditions.get(i);
      if (condition.containsKey("cond")) {
        allConditions.add(JSONObject.parseObject(condition.toString(), SingleCondition.class));
      }
      else if (condition.containsKey("conditions")){
        allConditions.add(JSONObject.parseObject(condition.toString(), MultiCondition.class));
      }
    }
    return new ButtonCondition(allConditions, result);
  }

  public boolean satisfiedBy(Map<String, Object> valueMap) {
    // 这里是一个责任链模式，为简单起见，采用了列表遍历
    for (ICondition cond: buttonRules) {
      if (cond.satisfiedBy(valueMap)) {
        return cond.getResult();
      }
    }
    return defaultResult;
  }
}

STEP6: 按钮逻辑配置及测试