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 * Copyright (c) 2017, 2018, Oracle and/or its affiliates.
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 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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package com.oracle.truffle.llvm.parser.metadata;

public final class MDImportedEntity extends MDName implements MDBaseNode {

    private final long tag;
    private final long line;

    private MDBaseNode scope;
    private MDBaseNode entity;

    private MDImportedEntity(long tag, long line) {
        this.tag = tag;
        this.line = line;

        this.scope = MDVoidNode.INSTANCE;
        this.entity = MDVoidNode.INSTANCE;
    }

    public long getTag() {
        return tag;
    }

    public MDBaseNode getScope() {
        return scope;
    }

    public MDBaseNode getEntity() {
        return entity;
    }

    public long getLine() {
        return line;
    }

    @Override
    public void replace(MDBaseNode oldValue, MDBaseNode newValue) {
        super.replace(oldValue, newValue);
        if (scope == oldValue) {
            scope = newValue;
        }
        if (entity == oldValue) {
            entity = newValue;
        }
    }

    @Override
    public void accept(MetadataVisitor visitor) {
        visitor.visit(this);
    }

    private static final int ARGINDEX_TAG = 1;
    private static final int ARGINDEX_SCOPE = 2;
    private static final int ARGINDEX_ENTITY = 3;
    private static final int ARGINDEX_LINE = 4;
    private static final int ARGINDEX_NAME = 5;

    public static MDImportedEntity create38(long[] args, MetadataValueList md) {
        final long tag = args[ARGINDEX_TAG];
        final long line = args[ARGINDEX_LINE];

        final MDImportedEntity importedEntity = new MDImportedEntity(tag, line);

        importedEntity.scope = md.getNullable(args[ARGINDEX_SCOPE], importedEntity);
        importedEntity.entity = md.getNullable(args[ARGINDEX_ENTITY], importedEntity);
        importedEntity.setName(md.getNullable(args[ARGINDEX_NAME], importedEntity));

        return importedEntity;
    }
}