50 lines
1.1 KiB
Java
50 lines
1.1 KiB
Java
// patterns/ProxyDemo.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Basic demonstration of the Proxy pattern.
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interface ProxyBase {
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void f();
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void g();
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void h();
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}
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class Proxy implements ProxyBase {
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private ProxyBase implementation =
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new Implementation();
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// Pass method calls to the implementation:
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@Override
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public void f() { implementation.f(); }
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@Override
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public void g() { implementation.g(); }
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@Override
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public void h() { implementation.h(); }
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}
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class Implementation implements ProxyBase {
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@Override public void f() {
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System.out.println("Implementation.f()");
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}
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@Override public void g() {
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System.out.println("Implementation.g()");
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}
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@Override public void h() {
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System.out.println("Implementation.h()");
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}
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}
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public class ProxyDemo {
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public static void main(String[] args) {
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Proxy p = new Proxy();
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p.f();
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p.g();
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p.h();
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}
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}
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/* Output:
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Implementation.f()
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Implementation.g()
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Implementation.h()
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*/
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