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/*
* Copyright (c) 2018, 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 8193524
* @summary Redefine a class' public static method that contains a lambda expression
* @library /test/lib
* @modules java.base/jdk.internal.misc
* @modules java.compiler
* java.instrument
* jdk.jartool/sun.tools.jar
* @run main RedefineClassHelper
* @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class*=trace RedefineSubtractLambdaExpression
*/
interface MathOperation {
public int operation(int a, int b);
}
class B {
public static int operate(int a, int b, MathOperation mathOperation) {
return mathOperation.operation(a, b);
}
static int test_math(String p) {
System.out.println(p + " from class B's test_math method");
MathOperation subtraction = (int a, int b) -> a - b;
MathOperation addition = (int a, int b) -> a + b;
return operate(10, 5, addition);
}
}
public class RedefineSubtractLambdaExpression {
public static String newB =
"class B {" +
" public static int operate(int a, int b, MathOperation mathOperation) {" +
" return mathOperation.operation(a, b);" +
" }" +
" static int test_math(String p) {" +
" MathOperation subtraction = (int a, int b) -> a - b;" +
" return operate(10, 5, subtraction);" +
" }" +
"}";
public static void main(String[] args) throws Exception {
int res = B.test_math("Hello");
System.out.println("Result = " + res);
if (res != 15) {
throw new Error("test_math returned " + res + " expected " + 15);
}
RedefineClassHelper.redefineClass(B.class, newB);
res = B.test_math("Hello");
if (res != 5)
throw new Error("test_math returned " + res + " expected " + 5);
}
}
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