org.sqlproc.engine.impl
Class SqlMetaText

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

All Implemented Interfaces:

SqlMetaElement, SqlMetaSimple

 class SqlMetaText
extends Object
implements SqlMetaSimple

A META SQL sub-element. It represents a text without any semantic value for a META SQL generation.

Author:

Vladimir Hudec

Field Summary

(package private) org.slf4j.Logger	logger The internal slf4j logger.
private String	sql An ANSI SQL fragment from META SQL.

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

SqlMetaText(String sql)
Creates a new instance.

Method Summary

boolean	isWhite() Returns an indicator that the text fragment is empty.
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.

sql

private String sql

An ANSI SQL fragment from META SQL.

Constructor Detail

SqlMetaText

SqlMetaText(String sql)

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

Parameters:

sql - the ANSI SQL fragment from META SQL

Method Detail

isWhite

public boolean isWhite()

Returns an indicator that the text fragment is empty.

Returns:

an indicator that the text fragment is empty

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