com.cloudera.impala.common.AliasGenerator Class Reference

Inheritance diagram for com.cloudera.impala.common.AliasGenerator:

Collaboration diagram for com.cloudera.impala.common.AliasGenerator:

Public Member Functions
String	getNextAlias ()

Protected Attributes
String	aliasPrefix_ = null
Set< String >	usedAliases_ = Sets.newHashSet()

Private Attributes
int	numGeneratedAliases_ = 1

Detailed Description

Abstract class representing an alias generator. It uses a prefix and a monotonically increasing counter to generate new aliases. Classes extending this class are responsible for initializing the prefix.

Definition at line 27 of file AliasGenerator.java.

Member Function Documentation

String com.cloudera.impala.common.AliasGenerator.getNextAlias ( )

inline

Return the next available alias.

Definition at line 35 of file AliasGenerator.java.

References com.cloudera.impala.common.AliasGenerator.aliasPrefix_, com.cloudera.impala.common.AliasGenerator.numGeneratedAliases_, and com.cloudera.impala.common.AliasGenerator.usedAliases_.

Member Data Documentation

String com.cloudera.impala.common.AliasGenerator.aliasPrefix_ = null

protected

Definition at line 29 of file AliasGenerator.java.

Referenced by com.cloudera.impala.common.ColumnAliasGenerator.ColumnAliasGenerator(), com.cloudera.impala.common.AliasGenerator.getNextAlias(), and com.cloudera.impala.common.TableAliasGenerator.TableAliasGenerator().

int com.cloudera.impala.common.AliasGenerator.numGeneratedAliases_ = 1

private

Definition at line 28 of file AliasGenerator.java.

Referenced by com.cloudera.impala.common.AliasGenerator.getNextAlias().

Set<String> com.cloudera.impala.common.AliasGenerator.usedAliases_ = Sets.newHashSet()

protected

Definition at line 30 of file AliasGenerator.java.

Referenced by com.cloudera.impala.common.AliasGenerator.getNextAlias().

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The documentation for this class was generated from the following file:

• fe/src/main/java/com/cloudera/impala/common/AliasGenerator.java