org.eclairjs.nashorn.sql.JSUDF16.java Source code

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Here is the source code for org.eclairjs.nashorn.sql.JSUDF16.java

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package org.eclairjs.nashorn.sql;/*
                                 * Copyright 2016 IBM Corp.
                                 *
                                 * Licensed 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
                                 *
                                 *      http://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 "AS IS" BASIS,
                                 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
                                 * See the License for the specific language governing permissions and
                                 * limitations under the License.
                                 */

import org.apache.commons.lang.ArrayUtils;
import org.apache.spark.sql.api.java.UDF16;
import org.eclairjs.nashorn.NashornEngineSingleton;

import javax.script.Invocable;
import javax.script.ScriptEngine;

public class JSUDF16 extends JSUDF implements UDF16 {
    private String func = null;
    private Object args[] = null;
    private Object fn = null;

    public JSUDF16(String func, Object[] o) {
        this.func = func;
        this.args = o;
    }

    @SuppressWarnings({ "null", "unchecked" })
    @Override
    public Object call(Object o, Object o2, Object o3, Object o4, Object o5, Object o6, Object o7, Object o8,
            Object o9, Object o10, Object o11, Object o12, Object o13, Object o14, Object o15, Object o16)
            throws Exception {
        ScriptEngine e = NashornEngineSingleton.getEngine();
        if (this.fn == null) {
            this.fn = e.eval(func);
        }
        Invocable invocable = (Invocable) e;

        Object params[] = { this.fn, o, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11, o12, o13, o14, o15, o16 };

        if (this.args != null && this.args.length > 0) {
            params = ArrayUtils.addAll(params, this.args);
        }

        Object ret = invocable.invokeFunction("Utils_invoke", params);
        ret = this.castValueToReturnType(ret);
        return ret;
    }

}