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 *   Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
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 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
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 *    https://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cayenne.access.sqlbuilder.sqltree;

import org.apache.cayenne.access.sqlbuilder.QuotingAppendable;

import java.util.Objects;

/**
 * @since 4.2
 */
public class OpExpressionNode extends ExpressionNode {

    private final String op;

    public OpExpressionNode(String op) {
        this.op = op;
    }

    @Override
    public void appendChildrenSeparator(QuotingAppendable buffer, int childInd) {
        buffer.append(' ').append(op);
    }

    @Override
    public Node copy() {
        return new OpExpressionNode(op);
    }

    public String getOp() {
        return op;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        if (!super.equals(o)) return false;
        OpExpressionNode that = (OpExpressionNode) o;
        return Objects.equals(op, that.op);
    }

    @Override
    public int hashCode() {
        return Objects.hash(super.hashCode(), op);
    }
}