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 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
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 *  KIND, either express or implied.  See the License for the
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package org.apache.cayenne.access.sqlbuilder;

import org.apache.cayenne.access.sqlbuilder.sqltree.FunctionNode;
import org.apache.cayenne.access.sqlbuilder.sqltree.Node;

/**
 * @since 4.2
 */
public class FunctionNodeBuilder implements ExpressionTrait {

    private final String functionName;
    private final NodeBuilder[] args;

    private String alias;

    FunctionNodeBuilder(String functionName, NodeBuilder... args) {
        this.functionName = functionName;
        this.args = args;
    }

    public FunctionNodeBuilder as(String alias) {
        this.alias = alias;
        return this;
    }

    @Override
    public Node build() {
        Node functionNode = new FunctionNode(functionName, alias, true);

        for(NodeBuilder arg : args) {
            functionNode.addChild(arg.build());
        }

        return functionNode;
    }

}
