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

(package private) List<SqlMetaElement>	elements The list of sub-elements based on ANTLR grammar.
(package private) 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

SqlMetaIfItem()
Creates a new instance.

Method Summary

(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 Detail

logger

final org.slf4j.Logger logger

The internal slf4j logger.

elements

List<SqlMetaElement> elements

The list of sub-elements based on ANTLR grammar.

Constructor Detail

SqlMetaIfItem

SqlMetaIfItem()

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

Method Detail

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