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/*
* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 5030063
* @summary Basic tests for flush().
*/
import java.io.Closeable;
import java.io.Flushable;
import java.util.Formatter;
import java.util.FormatterClosedException;
public class Flush {
private static class ExpectedException extends RuntimeException {}
private static class F implements Appendable, Closeable, Flushable {
public Appendable append(CharSequence csq) { return null; }
public Appendable append(char c) { return null; }
public Appendable append(CharSequence csq, int s, int e) {
return null;
}
public void close() {}
public void flush() {
throw new ExpectedException();
}
}
private static class NF implements Appendable, Closeable {
public Appendable append(CharSequence csq) { return null; }
public Appendable append(char c) { return null; }
public Appendable append(CharSequence csq, int s, int e) {
return null;
}
public void close() {}
// method coincidentally called flush()
public void flush() {
throw new RuntimeException("NF.flush should not be called");
}
}
private static void test(Formatter f) {
if (f.out() instanceof F) {
// F.flush() called since F implements Flushable
try {
f.flush();
throw new RuntimeException("F.flush not called");
} catch (ExpectedException x) {
System.out.println(" F.flush called");
}
} else {
// NF.flush() not called since NF does not implement Flushable
f.flush();
}
// Formatter is a Flushable
if (!(f instanceof Flushable))
throw new RuntimeException("Formatter is not a Flushable");
// flush() after close() throws a FormatterClosedException
f.close();
try {
f.flush();
throw new RuntimeException("FormatterClosedException not thrown");
} catch (FormatterClosedException x) {
System.out.println(" FormatterClosedException thrown");
}
}
public static void main(String [] args) {
System.out.println("testing Flushable");
test(new Formatter(new F()));
System.out.println("testing non-Flushable");
test(new Formatter(new NF()));
}
}
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