@sap/odata-v4/lib/uri/AliasExpression.js

OData V4.0 server library

'use strict';

const Expression = require('./Expression');

/**
 * Alias expression, i.e., usage of an alias name defined in a separate query option.
 *
 * @extends Expression
 * @hideconstructor
 */
class AliasExpression extends Expression {

    /**
     * Create an instance of AliasExpression.
     * @param {string} alias the alias name
     * @param {Expression} expression an expression as the alias value
     */
    constructor(alias, expression) {
        super(Expression.ExpressionKind.ALIAS);
        this._alias = alias;
        this._expression = expression;
    }

    /**
     * Return the alias name.
     * @returns {?string} the alias name
     */
    getAlias() {
        return this._alias;
    }

    /**
     * Return the alias value.
     * @returns {Expression} the alias value
     */
    getExpression() {
        return this._expression;
    }

    /**
     * Return the EDM type of this expression or null if there is none.
     * @returns {?EdmType} the EDM type of this expression or null if there is none
     */
    getType() {
        return this._expression.getType();
    }
}

module.exports = AliasExpression;