/*

 * Copyright (c) 2011, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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

 * @summary tests for class-specific values

 * @compile ClassValueTest.java

 * @run junit/othervm test.java.lang.invoke.ClassValueTest

 */

/*

  Manually:

   $ $JAVA7X_HOME/bin/javac -d foo -cp $JUNIT4_JAR test/java/lang/invoke/ClassValueTest.java

   $ $JAVA7X_HOME/bin/java -cp foo:$JUNIT4_JAR org.junit.runner.JUnitCore test.java.lang.invoke.ClassValueTest

  Output: .testAdd => 1000 : Integer

 */

package test.java.lang.invoke;

import java.util.*;

import java.lang.invoke.*;

import org.junit.*;

import static org.junit.Assert.*;

/**

 * @author jrose

 */

public class ClassValueTest {

    static String nameForCV1(Class<?> type) {

        return "CV1:" + type.getName();

    }

    int countForCV1;

    final ClassValue<String> CV1 = new CV1();

    private class CV1 extends ClassValue<String> {

        protected String computeValue(Class<?> type) {

            countForCV1++;

            return nameForCV1(type);

        }

    }

    static final Class[] CLASSES = {

        String.class,

        Integer.class,

        int.class,

        boolean[].class,

        char[][].class,

        ClassValueTest.class

    };

    @Test

    public void testGet() {

        countForCV1 = 0;

        for (Class c : CLASSES) {

            assertEquals(nameForCV1(c), CV1.get(c));

        }

        assertEquals(CLASSES.length, countForCV1);

        for (Class c : CLASSES) {

            assertEquals(nameForCV1(c), CV1.get(c));

        }

        assertEquals(CLASSES.length, countForCV1);

    }

    @Test

    public void testRemove() {

        for (Class c : CLASSES) {

            CV1.get(c);

        }

        countForCV1 = 0;

        int REMCOUNT = 3;

        for (int i = 0; i < REMCOUNT; i++) {

            CV1.remove(CLASSES[i]);

        }

        assertEquals(0, countForCV1);  // no change

        for (Class c : CLASSES) {

            assertEquals(nameForCV1(c), CV1.get(c));

        }

        assertEquals(REMCOUNT, countForCV1);

    }

    static String nameForCVN(Class<?> type, int n) {

        return "CV[" + n + "]" + type.getName();

    }

    int countForCVN;

    class CVN extends ClassValue<String> {

        final int n;

        CVN(int n) { this.n = n; }

        protected String computeValue(Class<?> type) {

            countForCVN++;

            return nameForCVN(type, n);

        }

    };

    @Test

    public void testGetMany() {

        int CVN_COUNT1 = 100, CVN_COUNT2 = 100;

        CVN cvns[] = new CVN[CVN_COUNT1 * CVN_COUNT2];

        for (int n = 0; n < cvns.length; n++) {

            cvns[n] = new CVN(n);

        }

        countForCVN = 0;

        for (int pass = 0; pass <= 2; pass++) {

            for (int i1 = 0; i1 < CVN_COUNT1; i1++) {

                eachClass:

                for (Class c : CLASSES) {

                    for (int i2 = 0; i2 < CVN_COUNT2; i2++) {

                        int n = i1*CVN_COUNT2 + i2;

                        assertEquals(0, countForCVN);

                        assertEquals(nameForCVN(c, n), cvns[n].get(c));

                        cvns[n].get(c);  //get it again

                        //System.out.println("getting "+n+":"+cvns[n].get(c));

                        boolean doremove = (((i1 + i2) & 3) == 0);

                        switch (pass) {

                        case 0:

                            assertEquals(1, countForCVN);

                            break;

                        case 1:

                            // remove on middle pass

                            assertEquals(0, countForCVN);

                            if (doremove) {

                                //System.out.println("removing "+n+":"+cvns[n].get(c));

                                cvns[n].remove(c);

                                assertEquals(0, countForCVN);

                            }

                            break;

                        case 2:

                            assertEquals(doremove ? 1 : 0, countForCVN);

                            break;

                        }

                        countForCVN = 0;

                        if (i1 > i2 && i1 < i2+5)  continue eachClass;  // leave diagonal gap

                    }

                }

            }

        }

        assertEquals(countForCVN, 0);

        for (int n = 0; n < cvns.length; n++) {

            for (Class c : CLASSES) {

                assertEquals(nameForCVN(c, n), cvns[n].get(c));

            }

        }

    }

}