org.apache.lens.cube.metadata
Class ExprColumn

java.lang.Object
  org.apache.lens.cube.metadata.CubeColumn
      org.apache.lens.cube.metadata.ExprColumn

All Implemented Interfaces:

Named

public class ExprColumn
extends CubeColumn

Field Summary

static char

EXPRESSION_DELIMITER

Constructor Summary

ExprColumn(org.apache.hadoop.hive.metastore.api.FieldSchema column, String displayString, String... expressions)

ExprColumn(String name, Map<String,String> props)

Method Summary

void	addExpression(String expression) Add an expression to existing set of expressions for this column
void	addProperties(Map<String,String> props)
boolean	equals(Object obj)
org.apache.hadoop.hive.ql.parse.ASTNode	getAst() Get the AST corresponding to the expression
String	getExpr()
List<org.apache.hadoop.hive.ql.parse.ASTNode>	getExpressionASTList()
Collection<String>	getExpressions() Get immutable view of this column's expressions
String	getType()
int	hashCode()
boolean	removeExpression(String expression) Remove an expression from the set of expressions of this column
String	toString()

Methods inherited from class org.apache.lens.cube.metadata.CubeColumn

getCost, getDescription, getDisplayString, getEndTime, getName, getStartTime

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

EXPRESSION_DELIMITER

public static final char EXPRESSION_DELIMITER

See Also:

Constant Field Values

Constructor Detail

ExprColumn

public ExprColumn(org.apache.hadoop.hive.metastore.api.FieldSchema column,
                  String displayString,
                  String... expressions)
           throws org.apache.hadoop.hive.ql.parse.ParseException

Throws:

org.apache.hadoop.hive.ql.parse.ParseException

ExprColumn

public ExprColumn(String name,
                  Map<String,String> props)

Method Detail

getExpr

public String getExpr()

Returns:

the expression

getType

public String getType()

addProperties

public void addProperties(Map<String,String> props)

Overrides:

addProperties in class CubeColumn

hashCode

public int hashCode()

Overrides:

hashCode in class CubeColumn

equals

public boolean equals(Object obj)

Overrides:

equals in class CubeColumn

toString

public String toString()

Overrides:

toString in class CubeColumn

getAst

public org.apache.hadoop.hive.ql.parse.ASTNode getAst()
                                               throws org.apache.hadoop.hive.ql.parse.ParseException

Get the AST corresponding to the expression

Returns:

the ast

Throws:

org.apache.hadoop.hive.ql.parse.ParseException

getExpressionASTList

public List<org.apache.hadoop.hive.ql.parse.ASTNode> getExpressionASTList()

getExpressions

public Collection<String> getExpressions()

Get immutable view of this column's expressions

Returns:

addExpression

public void addExpression(String expression)
                   throws org.apache.hadoop.hive.ql.parse.ParseException

Add an expression to existing set of expressions for this column

Parameters:

expression -

Throws:

org.apache.hadoop.hive.ql.parse.ParseException

removeExpression

public boolean removeExpression(String expression)

Remove an expression from the set of expressions of this column

Parameters:

expression -

Returns: