Package org.sqlproc.engine.impl

Class SqlMetaIfItem

java.lang.Object

org.sqlproc.engine.impl.SqlMetaIfItem

All Implemented Interfaces:

SqlMetaElement

class SqlMetaIfItem
extends Object
implements SqlMetaElement

A META SQL sub-element.

Schematically:

 SqlMetaIfItem
     SqlMetaText
     SqlMetaIdent
     SqlMetaConst
     SqlMetaAndOr for embedded {}, {&}, {|}
     SqlMetaIf for embedded {? }
 

Author:

Vladimir Hudec

Field Summary

Fields

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

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
SqlMetaIfItem()	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
(package private) void	addElement(SqlMetaElement element)	Adds a new sub-element.
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<SqlMetaElement> elements

The list of sub-elements based on ANTLR grammar.

Constructor Details

SqlMetaIfItem

SqlMetaIfItem()

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

Method Details

addElement

void addElement(SqlMetaElement element)

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

Parameters:

element - new sub-element, based on ANTLR grammar

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