From e2de2e1600905003fb0ed18226867f7a0bbf87ea Mon Sep 17 00:00:00 2001
From: YikesHome <31678324+yikeshome@users.noreply.github.com>
Date: Thu, 31 Oct 2019 03:05:23 +0800
Subject: [PATCH] Create factory_method.go

---
 creational/factory_method.go | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 creational/factory_method.go

diff --git a/creational/factory_method.go b/creational/factory_method.go
new file mode 100644
index 0000000..16dee30
--- /dev/null
+++ b/creational/factory_method.go
@@ -0,0 +1,33 @@
+package data
+
+import "io"
+
+type Store interface {
+    Open(string) (io.ReadWriteCloser, error)
+}
+
+
+type StorageType int
+
+const (
+    DiskStorage StorageType = 1 << iota
+    TempStorage
+    MemoryStorage
+)
+
+func NewStore(t StorageType) Store {
+    switch t {
+    case MemoryStorage:
+        return newMemoryStorage( /*...*/ )
+    case DiskStorage:
+        return newDiskStorage( /*...*/ )
+    default:
+        return newTempStorage( /*...*/ )
+    }
+}
+
+s, _ := NewStore(data.MemoryStorage)
+f, _ := s.Open("file")
+
+n, _ := f.Write([]byte("data"))
+defer f.Close()