ExprId.java

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.apache.doris.nereids.trees.expressions;

import org.apache.doris.common.Id;
import org.apache.doris.common.IdGenerator;

/**
 * UUID for Expression in Nereids.
 */
public class ExprId extends Id<ExprId> {

    public ExprId(int id) {
        super(id);
    }

    /**
     * Should be only called by {@link StatementScopeIdGenerator}.
     */
    public static IdGenerator<ExprId> createGenerator() {
        return createGenerator(0);
    }

    /**
     * for ut test only
     */
    public static IdGenerator<ExprId> createGenerator(int initialId) {
        return new IdGenerator<ExprId>() {
            @Override
            public ExprId getNextId() {
                return new ExprId(nextId++);
            }
        }.resetId(initialId);
    }

    @Override
    public String toString() {
        return "" + id;
    }

    @Override
    public boolean equals(Object obj) {
        return super.equals(obj);
    }

    @Override
    public int hashCode() {
        return super.hashCode();
    }
}