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/*
* Copyright (c) 1998-2002 PARC Inc. All rights reserved.
*
* Use and copying of this software and preparation of derivative works based
* upon this software are permitted. Any distribution of this software or
* derivative works must comply with all applicable United States export
* control laws.
*
* This software is made available AS IS, and PARC Inc. makes no
* warranty about the software, its performance or its conformity to any
* specification.
*/
public class StubReplace {
public static void main(String[] args) {
new PrintJob().run();
}
}
/** @author Wes Isberg */
aspect Stubs {
// article page 76 - stubs
// START-SAMPLE testing-inoculated-replaceWithProxy Replace object with proxy on constructiono
/**
* Replace all PrintStream with our StubStream
* by replacing the call to any constructor of
* PrinterStream or any subclasses.
*/
PrinterStream around () : within(PrintJob)
&& call (PrinterStream+.new(..)) && !call (StubStream+.new(..)) {
return new StubStream(thisJoinPoint.getArgs());
}
// END-SAMPLE testing-inoculated-replaceWithProxy
// START-SAMPLE testing-inoculated-adviseProxyCallsOnly Advise calls to the proxy object only
pointcut stubWrite() : printerStreamTestCalls() && target(StubStream);
pointcut printerStreamTestCalls() : call(* PrinterStream.write());
before() : stubWrite() {
System.err.println("picking out stubWrite" );
}
// END-SAMPLE testing-inoculated-adviseProxyCallsOnly
}
class PrinterStream {
public void write() {}
}
class StubStream extends PrinterStream {
public StubStream(Object[] args) {}
}
class PrintJob {
public void run() {
PrinterStream p = new PrinterStream();
System.err.println("not PrinterStream: " + p);
System.err.println("now trying call...");
p.write();
}
}
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