/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * 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
 *
 * 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.drill.exec.expr.annotations.Workspace;

<@pp.dropOutputFile />

<#list dateIntervalFunc.dates as type>

<@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/GTo${type}.java" />

<#include "/@includes/license.ftl" />

package org.apache.drill.exec.expr.fn.impl;

import org.apache.drill.exec.expr.DrillSimpleFunc;
import org.apache.drill.exec.expr.annotations.FunctionTemplate;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling;
import org.apache.drill.exec.expr.annotations.Output;
import org.apache.drill.exec.expr.annotations.Workspace;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.holders.*;
import org.apache.drill.exec.record.RecordBatch;

/*
 * This class is generated using freemarker and the ${.template_name} template.
 */

@FunctionTemplate(name = "to_${type?lower_case}" , scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public class GTo${type} implements DrillSimpleFunc {


    @Param  VarCharHolder left;
    @Param  VarCharHolder right;
    @Workspace org.joda.time.format.DateTimeFormatter format;
    @Output ${type}Holder out;

    public void setup() {
        // Get the desired output format
        byte[] buf = new byte[right.end - right.start];
        right.buffer.getBytes(right.start, buf, 0, right.end - right.start);
        String formatString = new String(buf, com.google.common.base.Charsets.UTF_8);
        format = org.joda.time.format.DateTimeFormat.forPattern(formatString);
    }

    public void eval() {

        // Get the input
        byte[] buf1 = new byte[left.end - left.start];
        left.buffer.getBytes(left.start, buf1, 0, left.end - left.start);
        String input = new String(buf1, com.google.common.base.Charsets.UTF_8);

        <#if type == "Date">
        out.value = (org.joda.time.DateMidnight.parse(input, format).withZoneRetainFields(org.joda.time.DateTimeZone.UTC)).getMillis();
        <#elseif type == "TimeStamp">
        out.value = org.joda.time.DateTime.parse(input, format).withZoneRetainFields(org.joda.time.DateTimeZone.UTC).getMillis();
        <#elseif type == "Time">
        out.value = (int) ((format.parseDateTime(input)).withZoneRetainFields(org.joda.time.DateTimeZone.UTC).getMillis());
        </#if>
    }
}
</#list>