/*
 * Copyright (c) 2015, 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.
 *
 */

package compiler.jvmci.compilerToVM;

import java.util.HashMap;
import java.util.Map;
import jdk.vm.ci.hotspot.HotSpotConstantPool;
import jdk.vm.ci.hotspot.HotSpotResolvedObjectTypeImpl;
import jdk.internal.misc.SharedSecrets;
import sun.reflect.ConstantPool;

/**
 * Common class for jdk.vm.ci.hotspot.CompilerToVM constant pool tests
 */
public class ConstantPoolTestCase {

    private final Map<ConstantPoolTestsHelper.ConstantTypes, Validator> typeTests;
    
    public static interface Validator {
        void validate(HotSpotConstantPool constantPoolCTVM, ConstantPool constantPoolSS,
            ConstantPoolTestsHelper.DummyClasses dummyClass, int index);
    }

    public ConstantPoolTestCase(Map<ConstantPoolTestsHelper.ConstantTypes, Validator> typeTests) {
        this.typeTests = new HashMap<>();
        this.typeTests.putAll(typeTests);
    }   
       
    private void messageOnFail(Throwable t,
            ConstantPoolTestsHelper.ConstantTypes cpType,
            ConstantPoolTestsHelper.DummyClasses dummyClass, int index) {
        ConstantPool constantPoolSS = SharedSecrets.getJavaLangAccess().
                        getConstantPool(dummyClass.klass);
        String msg = String.format("Test for %s constant pool entry of"
                        + " type %s",
                        dummyClass.klass, cpType.name());
        switch (cpType) {
            case CONSTANT_CLASS:
            case CONSTANT_STRING:
            case CONSTANT_METHODTYPE:    
                String utf8 = constantPoolSS
                        .getUTF8At((int) dummyClass.cp.get(index).value);
                msg = String.format("%s (%s) failed with %s", msg, utf8, t);
                break;
            case CONSTANT_INTEGER:
                int intValue = constantPoolSS.getIntAt(index);
                msg = String.format("%s (%d) failed with %s", msg, intValue, t);
                break;
            case CONSTANT_LONG:
                long longValue = constantPoolSS.getLongAt(index);
                msg = String.format("%s (%d) failed with %s", msg, longValue, t);
                break;
            case CONSTANT_FLOAT:
                float floatValue = constantPoolSS.getFloatAt(index);
                msg = String.format("%s (%E) failed with %s", msg, floatValue, t);
                break;
            case CONSTANT_DOUBLE:
                double doubleValue = constantPoolSS.getDoubleAt(index);
                msg = String.format("%s (%E) failed with %s", msg, doubleValue, t);
                break;
            case CONSTANT_UTF8:
                String utf8Value = constantPoolSS.getUTF8At(index);
                msg = String.format("%s (%s) failed with %s", msg, utf8Value, t);
                break;
            case CONSTANT_INVOKEDYNAMIC:
                index = ((int[]) dummyClass.cp.get(index).value)[1];
            case CONSTANT_NAMEANDTYPE:
                String name = constantPoolSS
                        .getUTF8At(((int[]) dummyClass.cp.get(index).value)[0]);
                String type = constantPoolSS
                        .getUTF8At(((int[]) dummyClass.cp.get(index).value)[1]);
                msg = String.format("%s (%s:%s) failed with %s",
                        msg, name, type, t);
                break;
            case CONSTANT_METHODHANDLE:
                index = ((int[]) dummyClass.cp.get(index).value)[1]; 
            case CONSTANT_METHODREF:
            case CONSTANT_INTERFACEMETHODREF:
            case CONSTANT_FIELDREF:
                int classIndex = ((int[]) dummyClass.cp.get(index).value)[0];
                int nameAndTypeIndex = ((int[]) dummyClass.cp.get(index).value)[1];
                String cName = constantPoolSS
                        .getUTF8At((int) dummyClass.cp.get(classIndex).value);
                String mName = constantPoolSS
                        .getUTF8At(((int[]) dummyClass.cp.get(nameAndTypeIndex).value)[0]);
                String mType = constantPoolSS
                        .getUTF8At(((int[]) dummyClass.cp.get(nameAndTypeIndex).value)[1]);
                msg = String.format("%s (%s.%s:%s) failed with %s ",
                        msg, cName, mName, mType, t);
                break;
            default:
                msg = String.format("Test bug: unknown constant type %s ", cpType);
        }
        throw new Error(msg + t.getMessage(), t);
    }

    public void test() {
        for (ConstantPoolTestsHelper.DummyClasses dummyClass
                : ConstantPoolTestsHelper.DummyClasses.values()) {
            System.out.printf("%nTesting dummy %s%n", dummyClass.klass);
            HotSpotResolvedObjectTypeImpl holder = HotSpotResolvedObjectTypeImpl
                    .fromObjectClass(dummyClass.klass);
            HotSpotConstantPool constantPoolCTVM = holder.getConstantPool();
            ConstantPool constantPoolSS = SharedSecrets.getJavaLangAccess().
                        getConstantPool(dummyClass.klass);
            for (Integer i : dummyClass.cp.keySet()) {
                ConstantPoolTestsHelper.ConstantTypes cpType
                        = dummyClass.cp.get(i).type;
                if (!typeTests.keySet().contains(cpType)) {
                    continue;
                }
                try {
                    typeTests.get(cpType).validate(constantPoolCTVM,
                            constantPoolSS, dummyClass, i);
                } catch (Throwable t) {
                    messageOnFail(t, cpType, dummyClass, i);
                }
            }
        }
    }
}