spark TypeQualifiers 源码

spark TypeQualifiers 代码

文件路径：/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/TypeQualifiers.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.
 */

package org.apache.hive.service.cli;

import java.util.HashMap;
import java.util.Map;

import org.apache.hadoop.hive.serde2.typeinfo.CharTypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.DecimalTypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.VarcharTypeInfo;
import org.apache.hive.service.rpc.thrift.TCLIServiceConstants;
import org.apache.hive.service.rpc.thrift.TTypeQualifierValue;
import org.apache.hive.service.rpc.thrift.TTypeQualifiers;

/**
 * This class holds type qualifier information for a primitive type,
 * such as char/varchar length or decimal precision/scale.
 */
public class TypeQualifiers {
  private Integer characterMaximumLength;
  private Integer precision;
  private Integer scale;

  public TypeQualifiers() {}

  public Integer getCharacterMaximumLength() {
    return characterMaximumLength;
  }
  public void setCharacterMaximumLength(int characterMaximumLength) {
    this.characterMaximumLength = characterMaximumLength;
  }

  public TTypeQualifiers toTTypeQualifiers() {
    TTypeQualifiers ret = null;

    Map<String, TTypeQualifierValue> qMap = new HashMap<String, TTypeQualifierValue>();
    if (getCharacterMaximumLength() != null) {
      TTypeQualifierValue val = new TTypeQualifierValue();
      val.setI32Value(getCharacterMaximumLength().intValue());
      qMap.put(TCLIServiceConstants.CHARACTER_MAXIMUM_LENGTH, val);
    }

    if (precision != null) {
      TTypeQualifierValue val = new TTypeQualifierValue();
      val.setI32Value(precision.intValue());
      qMap.put(TCLIServiceConstants.PRECISION, val);
    }

    if (scale != null) {
      TTypeQualifierValue val = new TTypeQualifierValue();
      val.setI32Value(scale.intValue());
      qMap.put(TCLIServiceConstants.SCALE, val);
    }

    if (qMap.size() > 0) {
      ret = new TTypeQualifiers(qMap);
    }

    return ret;
  }

  public static TypeQualifiers fromTTypeQualifiers(TTypeQualifiers ttq) {
    TypeQualifiers ret = null;
    if (ttq != null) {
      ret = new TypeQualifiers();
      Map<String, TTypeQualifierValue> tqMap = ttq.getQualifiers();

      if (tqMap.containsKey(TCLIServiceConstants.CHARACTER_MAXIMUM_LENGTH)) {
        ret.setCharacterMaximumLength(
            tqMap.get(TCLIServiceConstants.CHARACTER_MAXIMUM_LENGTH).getI32Value());
      }

      if (tqMap.containsKey(TCLIServiceConstants.PRECISION)) {
        ret.setPrecision(tqMap.get(TCLIServiceConstants.PRECISION).getI32Value());
      }

      if (tqMap.containsKey(TCLIServiceConstants.SCALE)) {
        ret.setScale(tqMap.get(TCLIServiceConstants.SCALE).getI32Value());
      }
    }
    return ret;
  }

  public static TypeQualifiers fromTypeInfo(PrimitiveTypeInfo pti) {
    TypeQualifiers result = null;
    if (pti instanceof VarcharTypeInfo) {
      result = new TypeQualifiers();
      result.setCharacterMaximumLength(((VarcharTypeInfo)pti).getLength());
    }  else if (pti instanceof CharTypeInfo) {
      result = new TypeQualifiers();
      result.setCharacterMaximumLength(((CharTypeInfo)pti).getLength());
    } else if (pti instanceof DecimalTypeInfo) {
      result = new TypeQualifiers();
      result.setPrecision(((DecimalTypeInfo)pti).precision());
      result.setScale(((DecimalTypeInfo)pti).scale());
    }
    return result;
  }

  public Integer getPrecision() {
    return precision;
  }

  public void setPrecision(Integer precision) {
    this.precision = precision;
  }

  public Integer getScale() {
    return scale;
  }

  public void setScale(Integer scale) {
    this.scale = scale;
  }

}

相关信息

spark 源码目录

相关文章

spark CLIService 源码

spark CLIServiceClient 源码

spark CLIServiceUtils 源码

spark ColumnBasedSet 源码

spark ColumnDescriptor 源码

spark ColumnValue 源码

spark FetchOrientation 源码

spark FetchType 源码

spark GetInfoType 源码

spark GetInfoValue 源码