/*

 * Copyright (c) 2011, 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 org.graalvm.compiler.nodes.virtual;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodeinfo.Verbosity;

import org.graalvm.compiler.nodes.FixedNode;

import org.graalvm.compiler.nodes.ValueNode;

import jdk.vm.ci.meta.JavaKind;

import jdk.vm.ci.meta.ResolvedJavaField;

import jdk.vm.ci.meta.ResolvedJavaType;

@NodeInfo(nameTemplate = "VirtualInstance({p#objectId}) {p#type/s}")

public class VirtualInstanceNode extends VirtualObjectNode {

    public static final NodeClass<VirtualInstanceNode> TYPE = NodeClass.create(VirtualInstanceNode.class);

    protected final ResolvedJavaType type;

    protected final ResolvedJavaField[] fields;

    public VirtualInstanceNode(ResolvedJavaType type, boolean hasIdentity) {

        this(type, type.getInstanceFields(true), hasIdentity);

    }

    public VirtualInstanceNode(ResolvedJavaType type, ResolvedJavaField[] fields, boolean hasIdentity) {

        this(TYPE, type, fields, hasIdentity);

    }

    protected VirtualInstanceNode(NodeClass<? extends VirtualInstanceNode> c, ResolvedJavaType type, boolean hasIdentity) {

        this(c, type, type.getInstanceFields(true), hasIdentity);

    }

    protected VirtualInstanceNode(NodeClass<? extends VirtualInstanceNode> c, ResolvedJavaType type, ResolvedJavaField[] fields, boolean hasIdentity) {

        super(c, type, hasIdentity);

        this.type = type;

        this.fields = fields;

    }

    @Override

    public ResolvedJavaType type() {

        return type;

    }

    @Override

    public int entryCount() {

        return fields.length;

    }

    public ResolvedJavaField field(int index) {

        return fields[index];

    }

    public ResolvedJavaField[] getFields() {

        return fields;

    }

    @Override

    public String toString(Verbosity verbosity) {

        if (verbosity == Verbosity.Name) {

            return super.toString(Verbosity.Name) + "(" + getObjectId() + ") " + type.toJavaName(false);

        } else {

            return super.toString(verbosity);

        }

    }

    @Override

    public String entryName(int index) {

        return fields[index].getName();

    }

    public int fieldIndex(ResolvedJavaField field) {

        // on average fields.length == ~6, so a linear search is fast enough

        for (int i = 0; i < fields.length; i++) {

            if (fields[i].equals(field)) {

                return i;

            }

        }

        return -1;

    }

    @Override

        return fieldIndex(type.findInstanceFieldWithOffset(constantOffset, expectedEntryKind));

    }

    @Override

    public JavaKind entryKind(int index) {

        assert index >= 0 && index < fields.length;

        return fields[index].getJavaKind();

    }

    @Override

    public VirtualInstanceNode duplicate() {

        return new VirtualInstanceNode(type, fields, super.hasIdentity());

    }

    @Override

    public ValueNode getMaterializedRepresentation(FixedNode fixed, ValueNode[] entries, LockState locks) {

        return new AllocatedObjectNode(this);

    }

}