test/hotspot/jtreg/runtime/Nestmates/privateConstructors/TestConstructorHierarchy.java

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/*
 * @test
 * @bug 8046171
 * @summary Test access to private constructors in the hierarchy that are
 * outside the nest
 * @compile TestConstructorHierarchy.java
 * @compile ExternalSuper.jcod
 *          ExternalSub.jcod
 * @run main TestConstructorHierarchy
 */

public class TestConstructorHierarchy {

    static class NestedA extends ExternalSuper {
        private NestedA() {}
        protected NestedA(int i) {} // for compile-time only
    }

    // Access to private members of classes outside the nest is
    // not permitted. These tests should throw IllegalAccessError
    // at runtime. To allow them to compile the classes below are
    // defined with public members. We then replace those class files
    // with jcod variants that make the member private again.

    public static void main(String[] args) throws Throwable {
        try {
            new ExternalSuper();
            throw new Error("Unexpected construction of ExternalSuper");
        }
        catch (IllegalAccessError iae) {
            if (iae.getMessage().contains("class TestConstructorHierarchy tried to access private method 'void ExternalSuper.<init>()'")) {
                System.out.println("Got expected exception constructing ExternalSuper: " + iae);
            }
            else throw new Error("Unexpected IllegalAccessError: " + iae);
        }
        try {
            new NestedA();
            throw new Error("Unexpected construction of NestedA and supers");
        }
        catch (IllegalAccessError iae) {
            if (iae.getMessage().contains("class TestConstructorHierarchy$NestedA tried to access private method 'void ExternalSuper.<init>()'")) {
                System.out.println("Got expected exception constructing NestedA: " + iae);
            }
            else throw new Error("Unexpected IllegalAccessError: " + iae);
        }
        try {
            new ExternalSub();
            throw new Error("Unexpected construction of ExternalSub");
        }
        catch (IllegalAccessError iae) {
            if (iae.getMessage().contains("class ExternalSub tried to access private method 'void TestConstructorHierarchy$NestedA.<init>()'")) {
                System.out.println("Got expected exception constructing ExternalSub: " + iae);
            }
            else throw new Error("Unexpected IllegalAccessError: " + iae);
        }
    }
}

// Classes that are not part of the nest.
// Being non-public allows us to declare them in this file.
// The constructor is public to allow this file to compile, but
// the jcod files change it back to private.

class ExternalSuper {
    public ExternalSuper() { }
}


class ExternalSub extends TestConstructorHierarchy.NestedA {
    public ExternalSub() {
        super(0); // this is changed to super() in jcod file
    }
}