/*
 * 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 com.oracle.graal.graphbuilderconf;

import com.oracle.jvmci.meta.ConstantReflectionProvider;
import com.oracle.jvmci.meta.JavaConstant;
import com.oracle.jvmci.meta.MetaAccessProvider;
import com.oracle.jvmci.meta.ResolvedJavaField;
import com.oracle.graal.nodes.*;

public interface LoadFieldPlugin extends GraphBuilderPlugin {
    @SuppressWarnings("unused")
    default boolean apply(GraphBuilderContext b, ValueNode receiver, ResolvedJavaField field) {
        return false;
    }

    @SuppressWarnings("unused")
    default boolean apply(GraphBuilderContext graphBuilderContext, ResolvedJavaField staticField) {
        return false;
    }

    default boolean tryConstantFold(GraphBuilderContext b, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection, ResolvedJavaField field, JavaConstant receiver) {
        JavaConstant result = constantReflection.readConstantFieldValue(field, receiver);
        if (result != null) {
            ConstantNode constantNode = ConstantNode.forConstant(result, metaAccess);
            b.addPush(field.getKind(), constantNode);
            return true;
        }
        return false;
    }
}