exec/java-exec/src/main/codegen/templates/CastUntypedNull.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 == "UntypedNull">

<@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.Output;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.holders.*;
import org.apache.drill.exec.vector.UntypedNullHolder;

/*
 * This class is generated using freemarker and the ${.template_name} template.
 */
@FunctionTemplate(name = "cast${type.to?upper_case}",
    scope = FunctionTemplate.FunctionScope.SIMPLE,
    nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
public class Cast${type.from}${type.to} implements DrillSimpleFunc {

  @Param ${type.from}Holder in;
  <#if type.to == "VarDecimal">
  @Param IntHolder precision;
  @Param IntHolder scale;
  <#elseif type.to == "VarChar" || type.to == "VarBinary" || type.to == "Var16Char">
  @Param BigIntHolder len;
  </#if>
  @Output Nullable${type.to}Holder out;

  public void setup() {
  }

  public void eval() {
    out.isSet = 0;
  }
}
</#if> <#-- type.major -->
</#list>