org.apache.hadoop.hive.ql.parse.type

Class TypeCheckProcFactory<T>

java.lang.Object

org.apache.hadoop.hive.ql.parse.type.TypeCheckProcFactory<T>

Direct Known Subclasses:

JoinCondTypeCheckProcFactory

public class TypeCheckProcFactory<T>
extends Object

The Factory for creating typecheck processors. The typecheck processors are used to processes the syntax trees for expressions and convert them into expression Node Descriptor trees. They also introduce the correct conversion functions to do proper implicit conversion. At instantiation time, a expression factory needs to be provided to this class.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	TypeCheckProcFactory.BoolExprProcessor Processor for boolean constants.
class	TypeCheckProcFactory.ColumnExprProcessor Processor for table columns.
class	TypeCheckProcFactory.DateTimeExprProcessor Processor for date constants.
class	TypeCheckProcFactory.DefaultExprProcessor The default processor for typechecking.
class	TypeCheckProcFactory.DynamicParameterProcessor Processor for processing Dynamic expression.
class	TypeCheckProcFactory.IntervalExprProcessor Processor for interval constants.
class	TypeCheckProcFactory.NullExprProcessor Processor for processing NULL expression.
class	TypeCheckProcFactory.NumExprProcessor Processor for processing numeric constants.
class	TypeCheckProcFactory.StrExprProcessor Processor for processing string constants.
class	TypeCheckProcFactory.SubQueryExprProcessor Processor for subquery expressions..
static class	TypeCheckProcFactory.ValueAliasProcessor

Field Summary

Fields

Modifier and Type	Field and Description
protected ExprFactory<T>	exprFactory Factory that will be used to create the different expressions.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TypeCheckProcFactory(ExprFactory<T> exprFactory)

Method Summary

Modifier and Type	Method and Description
protected Map<ASTNode,T>	convert(Map<Node,Object> outputs)
protected Map<ASTNode,T>	genExprNode(ASTNode expr, TypeCheckCtx tcCtx)
protected TypeCheckProcFactory.BoolExprProcessor	getBoolExprProcessor() Factory method to get BoolExprProcessor.
protected TypeCheckProcFactory.ColumnExprProcessor	getColumnExprProcessor() Factory method to get ColumnExprProcessor.
protected TypeCheckProcFactory.DateTimeExprProcessor	getDateTimeExprProcessor() Factory method to get DateExprProcessor.
protected TypeCheckProcFactory.DefaultExprProcessor	getDefaultExprProcessor() Factory method to get DefaultExprProcessor.
protected TypeCheckProcFactory.DynamicParameterProcessor	getDynamicParameterProcessor() Factory method to get TypeCheckProcFactory.DynamicParameterProcessor.
static String	getFunctionText(ASTNode expr, boolean isFunction)
protected TypeCheckProcFactory.IntervalExprProcessor	getIntervalExprProcessor() Factory method to get IntervalExprProcessor.
protected TypeCheckProcFactory.NullExprProcessor	getNullExprProcessor() Factory method to get NullExprProcessor.
protected TypeCheckProcFactory.NumExprProcessor	getNumExprProcessor() Factory method to get NumExprProcessor.
protected TypeCheckProcFactory.StrExprProcessor	getStrExprProcessor() Factory method to get StrExprProcessor.
protected TypeCheckProcFactory.SubQueryExprProcessor	getSubQueryExprProcessor() Factory method to get SubQueryExprProcessor.
static boolean	isStringType(TypeInfo typeInfo)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

exprFactory

protected final ExprFactory<T> exprFactory

Factory that will be used to create the different expressions.

Constructor Detail

TypeCheckProcFactory

protected TypeCheckProcFactory(ExprFactory<T> exprFactory)

Method Detail

genExprNode

protected Map<ASTNode,T> genExprNode(ASTNode expr,
                                     TypeCheckCtx tcCtx)
                              throws SemanticException

Throws:

SemanticException

convert

protected Map<ASTNode,T> convert(Map<Node,Object> outputs)

getNullExprProcessor

protected TypeCheckProcFactory.NullExprProcessor getNullExprProcessor()

Factory method to get NullExprProcessor.

Returns:

NullExprProcessor.

getDynamicParameterProcessor

protected TypeCheckProcFactory.DynamicParameterProcessor getDynamicParameterProcessor()

Factory method to get TypeCheckProcFactory.DynamicParameterProcessor.

getNumExprProcessor

protected TypeCheckProcFactory.NumExprProcessor getNumExprProcessor()

Factory method to get NumExprProcessor.

Returns:

NumExprProcessor.

getStrExprProcessor

protected TypeCheckProcFactory.StrExprProcessor getStrExprProcessor()

Factory method to get StrExprProcessor.

Returns:

StrExprProcessor.

getBoolExprProcessor

protected TypeCheckProcFactory.BoolExprProcessor getBoolExprProcessor()

Factory method to get BoolExprProcessor.

Returns:

BoolExprProcessor.

getDateTimeExprProcessor

protected TypeCheckProcFactory.DateTimeExprProcessor getDateTimeExprProcessor()

Factory method to get DateExprProcessor.

Returns:

DateExprProcessor.

getIntervalExprProcessor

protected TypeCheckProcFactory.IntervalExprProcessor getIntervalExprProcessor()

Factory method to get IntervalExprProcessor.

Returns:

IntervalExprProcessor.

getColumnExprProcessor

protected TypeCheckProcFactory.ColumnExprProcessor getColumnExprProcessor()

Factory method to get ColumnExprProcessor.

Returns:

ColumnExprProcessor.

getDefaultExprProcessor

protected TypeCheckProcFactory.DefaultExprProcessor getDefaultExprProcessor()

Factory method to get DefaultExprProcessor.

Returns:

DefaultExprProcessor.

getSubQueryExprProcessor

protected TypeCheckProcFactory.SubQueryExprProcessor getSubQueryExprProcessor()

Factory method to get SubQueryExprProcessor.

Returns:

DateExprProcessor.

isStringType

public static boolean isStringType(TypeInfo typeInfo)

getFunctionText

public static String getFunctionText(ASTNode expr,
                                     boolean isFunction)