Package org.sqlproc.engine.impl

Class SqlMetaAndOr

java.lang.Object

org.sqlproc.engine.impl.SqlMetaAndOr

All Implemented Interfaces:

SqlMetaElement

class SqlMetaAndOr
extends Object
implements SqlMetaElement

A META SQL sub-element.

Schematically:

 SqlMetaAndOr 
     { SqlMetaIfItem | SqlMetaIfItem...}
     {& SqlMetaIfItem | SqlMetaIfItem...}
     {| SqlMetaIfItem | SqlMetaIfItem...}
 

Author:

Vladimir Hudec

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static enum	SqlMetaAndOr.Type	The enumeration of types.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) List<SqlMetaIfItem>	elements	The list of sub-elements based on ANTLR grammar.
(package private) final org.slf4j.Logger	logger	The internal slf4j logger.
(package private) SqlMetaAndOr.Type	type	The type if this element.

Fields inherited from interface org.sqlproc.engine.impl.SqlMetaElement

AND_PREFIX, CONST_PREFIX, IDENT_PREFIX, IDENT_SEPARATOR, lCONST_PREFIX, lIDENT_PREFIX, OR_PREFIX, SET_PREFIX, VALUES_PREFIX, WHERE_PREFIX

Constructor Summary

Constructors

Constructor	Description
SqlMetaAndOr(SqlMetaAndOr.Type type)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
(package private) void	addElement(SqlMetaIfItem element)	Adds a new sub-element.
(package private) String	getPrefix()	Returns one of the next ANSI SQL fragments: , AND or OR.
SqlProcessResult	process(SqlProcessContext ctx)	The main contract for a dynamic ANSI SQL Query generation.

Methods inherited from class java.lang.Object

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

Field Details

logger

final org.slf4j.Logger logger

The internal slf4j logger.

elements

List<SqlMetaIfItem> elements

The list of sub-elements based on ANTLR grammar.

type

SqlMetaAndOr.Type type

The type if this element. It controls, how the related ANSI SQL fragment is added to the final ANSI SQL.

Constructor Details

SqlMetaAndOr

SqlMetaAndOr(SqlMetaAndOr.Type type)

Creates a new instance. It's used from inside ANTLR parser.

Parameters:

type - the type, which is used to control, how the related ANSI SQL fragment is added to the final ANSI SQL.

Method Details

addElement

void addElement(SqlMetaIfItem element)

Adds a new sub-element. It's used from inside ANTLR parser.

Parameters:

element - new sub-element, based on ANTLR grammar

getPrefix

String getPrefix()

Returns one of the next ANSI SQL fragments: , AND or OR.

Returns:

the ANSI SQL fragment based on the type of this element

process

public SqlProcessResult process(SqlProcessContext ctx)

The main contract for a dynamic ANSI SQL Query generation. Also known as a META SQL processing. The composite pattern main contract. All ANTLR grammar based elements must implement this contract.

Specified by:

process in interface SqlMetaElement

Parameters:

ctx - the crate for all input parameters and the context of processing