/*
 * Copyright (c) 2017, 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
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 */
package org.graalvm.compiler.hotspot.replacements;

import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_ARRAY_KLASS_LOCATION;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayKlassOffset;
import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.loadKlassFromObject;

import java.lang.reflect.Array;

import org.graalvm.compiler.api.directives.GraalDirectives;
import org.graalvm.compiler.api.replacements.ClassSubstitution;
import org.graalvm.compiler.api.replacements.MethodSubstitution;
import org.graalvm.compiler.nodes.java.DynamicNewArrayNode;

// JaCoCo Exclude

/**
 * Substitutions for {@link Array} methods.
 */
@ClassSubstitution(Array.class)
public class HotSpotArraySubstitutions {

    @MethodSubstitution
    public static Object newInstance(Class<?> componentType, int length) {
        if (componentType == null || loadKlassFromObject(componentType, arrayKlassOffset(INJECTED_VMCONFIG), CLASS_ARRAY_KLASS_LOCATION).isNull()) {
            // Exit the intrinsic here for the case where the array class does not exist
            return newInstance(componentType, length);
        }
        return DynamicNewArrayNode.newArray(GraalDirectives.guardingNonNull(componentType), length);
    }

}