💤 Lazy + cache
🔒 Protection
🖼 photo-1
🖼 photo-2
🖼 photo-3
↺ Reset
requests:
0
disk loads:
0
client → proxy → real image · same interface:
display()
👤
CLIENT
calls display()
➜
⚡
🪞
PROXY
ImageProxy · cache
p1
p2
p3
from cache
➜
💾
REAL IMAGE
RealImage · 5 MB on disk
🖼
loaded 5 MB
🙂 Guest
🛡 Admin
▶ Delete photo
↺ Reset
real object calls:
0
client → proxy → real object · same interface:
deleteImage()
👤
CLIENT
role: guest
➜
🪞
PROXY
checks role first
✗ denied
➜
🗑
REAL OBJECT
deleteImage()
🖼
untouched
Proxy — a stand-in with the same interface
Click a photo — the proxy decides whether the disk is touched.
▸
Click the
same photo twice
— watch which chip moves.