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 * 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

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 */

/*

 * @test

 * @bug 7079713

 * @summary javac hangs when compiling a class that references a cyclically inherited class

 * @run main TestCircularClassfile

 */

import java.io.*;

import java.net.URI;

import java.util.Arrays;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.StandardLocation;

import javax.tools.ToolProvider;

import com.sun.source.util.JavacTask;

public class TestCircularClassfile {

    enum SourceKind {

        A_EXTENDS_B("class B {} class A extends B { void m() {} }"),

        B_EXTENDS_A("class A { void m() {} } class B extends A {}");

        String sourceStr;

        private SourceKind(String sourceStr) {

            this.sourceStr = sourceStr;

        }

        SimpleJavaFileObject getSource() {

            return new SimpleJavaFileObject(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE) {

                @Override

                public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {

                    return sourceStr;

                }

            };

        }

    }

    enum TestKind {

        REPLACE_A("A.class"),

        REPLACE_B("B.class");

        String targetClass;

        private TestKind(String targetClass) {

            this.targetClass = targetClass;

        }

    }

    enum ClientKind {

        METHOD_CALL1("A a = null; a.m();"),

        METHOD_CALL2("B b = null; b.m();"),

        CONSTR_CALL1("new A();"),

        CONSTR_CALL2("new B();"),

        ASSIGN1("A a = null; B b = a;"),

        ASSIGN2("B b = null; A a = b;");

        String mainMethod;

        private ClientKind(String mainMethod) {

            this.mainMethod = mainMethod;

        }

        SimpleJavaFileObject getSource() {

            return new SimpleJavaFileObject(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE) {

                @Override

                public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {

                    return "class Test { public static void main(String[] args) { #M } }"

                            .replace("#M", mainMethod);

                }

            };

        }

    }

    public static void main(String... args) throws Exception {

        JavaCompiler comp = ToolProvider.getSystemJavaCompiler();

                    }

                }

            }

        }

    }

    static String workDir = System.getProperty("user.dir");

    String destPath;

    SourceKind sk1;

    SourceKind sk2;

    TestKind tk;

    ClientKind ck;

    TestCircularClassfile(String destPath, SourceKind sk1, SourceKind sk2, TestKind tk, ClientKind ck) {

        this.destPath = destPath;

        this.sk1 = sk1;

        this.sk2 = sk2;

        this.tk = tk;

        this.ck = ck;

    }

    void check(JavaCompiler comp, StandardJavaFileManager fm) throws Exception {

        //step 1: compile first source code in the test subfolder

        File destDir = new File(workDir, destPath); destDir.mkdir();

        //output dir must be set explicitly as we are sharing the fm (see bug 7026941)

        fm.setLocation(javax.tools.StandardLocation.CLASS_OUTPUT, Arrays.asList(destDir));

        JavacTask ct = (JavacTask)comp.getTask(null, fm, null,

                null, null, Arrays.asList(sk1.getSource()));

        ct.generate();

        //step 2: compile second source code in a temp folder

        File tmpDir = new File(destDir, "tmp"); tmpDir.mkdir();

        //output dir must be set explicitly as we are sharing the fm (see bug 7026941)

        fm.setLocation(javax.tools.StandardLocation.CLASS_OUTPUT, Arrays.asList(tmpDir));

        ct = (JavacTask)comp.getTask(null, fm, null,

                null, null, Arrays.asList(sk2.getSource()));

        ct.generate();

        //step 3: move a classfile from the temp folder to the test subfolder

        File fileToMove = new File(tmpDir, tk.targetClass);

        File target = new File(destDir, tk.targetClass);

        target.delete();

        boolean success = fileToMove.renameTo(target);

        if (!success) {

            throw new AssertionError("error when moving file " + tk.targetClass);

        }

        //step 4: compile the client class against the classes in the test subfolder

        //input/output dir must be set explicitly as we are sharing the fm (see bug 7026941)

        fm.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(destDir));

        fm.setLocation(StandardLocation.CLASS_PATH, Arrays.asList(destDir));

        ct = (JavacTask)comp.getTask(null, fm, null,

                null, null, Arrays.asList(ck.getSource()));

        ct.generate();

    }

}