all index.md files renamed to README.md for more compatibility with github

proxy/README.md

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+---
+layout: pattern
+title: Proxy
+folder: proxy
+permalink: /patterns/proxy/
+categories: Structural
+tags:
+ - Java
+ - Gang Of Four
+ - Difficulty-Beginner
+---
+
+## Also known as
+Surrogate
+
+## Intent
+Provide a surrogate or placeholder for another object to control
+access to it.
+
+![alt text](./etc/proxy_1.png "Proxy")
+
+## Applicability
+Proxy is applicable whenever there is a need for a more
+versatile or sophisticated reference to an object than a simple pointer. Here
+are several common situations in which the Proxy pattern is applicable
+
+* a remote proxy provides a local representative for an object in a different address space.
+* a virtual proxy creates expensive objects on demand.
+* a protection proxy controls access to the original object. Protection proxies are useful when objects should have different access rights.
+
+## Typical Use Case
+
+* control access to another object
+* lazy initialization
+* implement logging
+* facilitate network connection
+* to count references to an object
+
+## Real world examples
+
+* [java.lang.reflect.Proxy](http://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Proxy.html)
+* [Apache Commons Proxy](https://commons.apache.org/proper/commons-proxy/)
+
+## Credits
+
+* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)