org.sqlproc.engine.impl
Class SqlMetaAndOr

java.lang.Object
  org.sqlproc.engine.impl.SqlMetaAndOr

All Implemented Interfaces:

SqlMetaElement

 class SqlMetaAndOr
extends java.lang.Object
implements SqlMetaElement

A META SQL sub-element.

Schematically:

 SqlMetaAndOr 
     { SqlMetaAndOrItem | SqlMetaAndOrItem...}
     {& SqlMetaAndOrItem | SqlMetaAndOrItem...}
     {| SqlMetaAndOrItem | SqlMetaAndOrItem...}
 

Author:

Vladimir Hudec

Nested Class Summary

(package private) static class

SqlMetaAndOr.Type The enumeration of types.

Field Summary

(package private) java.util.List<SqlMetaAndOrItem>	elements The list of sub-elements based on ANTLR grammar.
(package private) 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_PREFIX_LEN, IDENT_SEPARATOR, OR_PREFIX

Constructor Summary

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

Method Summary

(package private) void	addElement(SqlMetaAndOrItem element) Adds a new sub-element.
(package private) java.lang.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 Detail

logger

final org.slf4j.Logger logger

The internal slf4j logger.

elements

java.util.List<SqlMetaAndOrItem> 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 Detail

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 Detail

addElement

void addElement(SqlMetaAndOrItem element)

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

Parameters:

element - new sub-element, based on ANTLR grammar

getPrefix

java.lang.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