支付

src/main/java/com/ycwl/basic/pay/PayFactory.java

@@ -0,0 +1,58 @@
+package com.ycwl.basic.pay;
+
+import com.ycwl.basic.pay.adapter.IPayAdapter;
+import com.ycwl.basic.pay.adapter.WxMpPayAdapter;
+import com.ycwl.basic.pay.enums.PayAdapterType;
+import com.ycwl.basic.pay.exceptions.PayUndefinedException;
+import com.ycwl.basic.pay.exceptions.PayUnsupportedException;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class PayFactory {
+
+    public static IPayAdapter getAdapter(String typeName) {
+        PayAdapterType adapterEnum;
+        try {
+            adapterEnum = PayAdapterType.valueOf(typeName);
+        } catch (IllegalArgumentException e) {
+            throw new PayUnsupportedException("不支持的Adapter类型");
+        }
+        return getAdapter(adapterEnum);
+    }
+
+    public static IPayAdapter getAdapter(PayAdapterType type) {
+        switch (type) {
+            case WX_MP_PAY:
+                return new WxMpPayAdapter();
+            default:
+                throw new PayUnsupportedException("不支持的Adapter类型");
+        }
+    }
+
+    protected static Map<String, IPayAdapter> namedAdapter = new HashMap<>();
+    protected static IPayAdapter defaultAdapter = null;
+
+    public static void register(String name, IPayAdapter adapter) {
+        namedAdapter.put(name, adapter);
+    }
+
+    public static IPayAdapter use(String name) {
+        IPayAdapter adapter = namedAdapter.get(name);
+        if (adapter == null) {
+            throw new PayUndefinedException("未定义的支付方式："+name);
+        }
+        return adapter;
+    }
+
+    public static IPayAdapter use() {
+        if (defaultAdapter == null) {
+            throw new PayUndefinedException("未定义默认的支付方式");
+        }
+        return defaultAdapter;
+    }
+
+    public static void setDefault(String defaultName) {
+        PayFactory.defaultAdapter = use(defaultName);
+    }
+}