exec/java-exec/src/main/codegen/templates/CastFunctions.java

/*
 * 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.
 */
<@pp.dropOutputFile />



<#list cast.types as type>
<#if type.major == "Fixed">

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

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

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

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.Param;
import org.apache.drill.exec.expr.holders.*;
import javax.inject.Inject;
import io.netty.buffer.DrillBuf;
import org.apache.drill.exec.record.RecordBatch;

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

@SuppressWarnings("unused")
@FunctionTemplate(name = "cast${type.to?upper_case}",
                  scope = FunctionTemplate.FunctionScope.SIMPLE,
                  nulls = NullHandling.NULL_IF_NULL)
public class Cast${type.from}${type.to} implements DrillSimpleFunc {

  @Param ${type.from}Holder in;
  @Output ${type.to}Holder out;

  public void setup() {}

  public void eval() {
    <#if (type.from.startsWith("Float") && type.to.endsWith("Int"))>
    ${type.native} fractional = in.value % 1;
    int digit = ((int) (fractional * 10));
    int carry = 0;
    if (java.lang.Math.abs(digit) > 4) {
      carry = (int) java.lang.Math.signum(digit);
    }
    out.value = (${type.explicit}) (in.value + carry);
    <#elseif type.explicit??>
    out.value = (${type.explicit}) in.value;
    <#else>
    out.value = in.value;
    </#if>
  }
}

</#if> <#-- type.major -->
</#list>