exec/java-exec/src/main/codegen/templates/UnionFunctions.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 />
<@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/GUnionFunctions.java" />


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

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

<#include "/@includes/vv_imports.ftl" />
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")
/**
 * Additional functions can be found in the class UnionFunctions
 */
public class GUnionFunctions {
  <#list vv.types as type><#list type.minor as minor><#assign name = minor.class?cap_first />
  <#assign fields = minor.fields!type.fields />
  <#assign uncappedName = name?uncap_first/>

  <#if !minor.class?starts_with("Decimal")>
  @FunctionTemplate(
      name = "IS_${name?upper_case}",
      scope = FunctionTemplate.FunctionScope.SIMPLE,
      nulls = NullHandling.INTERNAL)
  public static class UnionIs${name} implements DrillSimpleFunc {

    @Param UnionHolder in;
    @Output BitHolder out;

    public void setup() {}

    public void eval() {
      if (in.isSet == 1) {
        out.value = in.getType().getMinorType() == org.apache.drill.common.types.TypeProtos.MinorType.${name?upper_case} ? 1 : 0;
      } else {
        out.value = 0;
      }
    }
  }

  @FunctionTemplate(
      name = "ASSERT_${name?upper_case}",
      scope = FunctionTemplate.FunctionScope.SIMPLE,
      nulls = NullHandling.INTERNAL)
  public static class CastUnion${name} implements DrillSimpleFunc {

    @Param UnionHolder in;
    @Output Nullable${name}Holder out;

    public void setup() {}

    public void eval() {
      if (in.isSet == 1) {
        in.reader.read(out);
      } else {
        out.isSet = 0;
      }
    }
  }
  </#if>
  </#list></#list>
}