Scala FilterCompat类代码示例

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本文整理汇总了Scala中org.apache.parquet.filter2.compat.FilterCompat类的典型用法代码示例。如果您正苦于以下问题：Scala FilterCompat类的具体用法？Scala FilterCompat怎么用？Scala FilterCompat使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了FilterCompat类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Scala代码示例。

示例1: apply

//设置package包名称以及导入依赖的类
package io.eels.component.parquet.avro

import io.eels.Predicate
import io.eels.component.parquet.{ParquetPredicateBuilder, ParquetReaderConfig}
import org.apache.avro.Schema
import org.apache.avro.generic.GenericRecord
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.fs.Path
import org.apache.parquet.avro.{AvroParquetReader, AvroReadSupport}
import org.apache.parquet.filter2.compat.FilterCompat
import org.apache.parquet.hadoop.ParquetReader


  def apply(path: Path,
            predicate: Option[Predicate],
            projectionSchema: Option[Schema])(implicit conf: Configuration): ParquetReader[GenericRecord] = {

    // The parquet reader can use a projection by setting a projected schema onto a conf object
    def configuration(): Configuration = {
      val newconf = new Configuration(conf)
      projectionSchema.foreach { it =>
        AvroReadSupport.setAvroReadSchema(newconf, it)
        AvroReadSupport.setRequestedProjection(newconf, it)
      }
      //conf.set(ParquetInputFormat.DICTIONARY_FILTERING_ENABLED, "true")
      newconf.set(org.apache.parquet.hadoop.ParquetFileReader.PARQUET_READ_PARALLELISM, config.parallelism.toString)
      newconf
    }

    // a filter is set when we have a predicate for the read
    def filter(): FilterCompat.Filter = predicate.map(ParquetPredicateBuilder.build)
      .map(FilterCompat.get)
      .getOrElse(FilterCompat.NOOP)

    AvroParquetReader.builder[GenericRecord](path)
      .withCompatibility(false)
      .withConf(configuration())
      .withFilter(filter())
      .build()
      .asInstanceOf[ParquetReader[GenericRecord]]
  }
}

开发者ID:51zero，项目名称:eel-sdk，代码行数:43，代码来源:AvroParquetReaderFn.scala

示例2: apply

//设置package包名称以及导入依赖的类
package io.eels.component.parquet

import com.sksamuel.exts.Logging
import io.eels.{Predicate, Row}
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.fs.Path
import org.apache.parquet.filter2.compat.FilterCompat
import org.apache.parquet.hadoop.api.ReadSupport
import org.apache.parquet.hadoop.{ParquetInputFormat, ParquetReader}
import org.apache.parquet.schema.Type


  def apply(path: Path,
            predicate: Option[Predicate],
            readSchema: Option[Type],
            dictionaryFiltering: Boolean)(implicit conf: Configuration): ParquetReader[Row] = {
    logger.debug(s"Opening parquet reader for $path")

    // The parquet reader can use a projection by setting a projected schema onto the supplied conf object
    def configuration(): Configuration = {
      val newconf = new Configuration(conf)
      readSchema.foreach { it =>
        newconf.set(ReadSupport.PARQUET_READ_SCHEMA, it.toString)
      }
      newconf.set(ParquetInputFormat.DICTIONARY_FILTERING_ENABLED, dictionaryFiltering.toString)
      newconf.set(org.apache.parquet.hadoop.ParquetFileReader.PARQUET_READ_PARALLELISM, config.parallelism.toString)
      newconf
    }

    // a filter is set when we have a predicate for the read
    def filter(): FilterCompat.Filter = predicate.map(ParquetPredicateBuilder.build)
      .map(FilterCompat.get)
      .getOrElse(FilterCompat.NOOP)

    ParquetReader.builder(new RowReadSupport, path)
      .withConf(configuration())
      .withFilter(filter())
      .build()
  }
}

开发者ID:51zero，项目名称:eel-sdk，代码行数:41，代码来源:RowParquetReaderFn.scala

注：本文中的org.apache.parquet.filter2.compat.FilterCompat类示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。