org.sqlproc.engine.impl

Class SqlMetaSqlFragment

java.lang.Object

org.sqlproc.engine.impl.SqlMetaSqlFragment

All Implemented Interfaces:

SqlMetaElement

 class SqlMetaSqlFragment
extends Object
implements SqlMetaElement

A META SQL sub-element.

Schematically:

 SqlMetaSqlFragment 
     {= IDENT SqlMetaIfItem}
 

where IDENT can be

• where for WHERE fragment of the final SQL query/statement
• set for WHERE fragment of the final SQL update statement
• values for WHERE fragment of the final SQL insert statement

Author:

Vladimir Hudec

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) static class	SqlMetaSqlFragment.Type The enumeration of types.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) List<SqlMetaIfItem>	elements The list of sub-elements based on ANTLR grammar.
(package private) org.slf4j.Logger	logger The internal slf4j logger.
(package private) boolean	optimistic The indicator for the types WHERE and SET in the case of optimistic locking.
(package private) static Pattern	patternColumns
(package private) static Pattern	patternSet
(package private) static Pattern	patternValues
(package private) static Pattern	patternWhere
(package private) SqlMetaSqlFragment.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 and Description
SqlMetaSqlFragment(SqlMetaSqlFragment.Type type) Creates a new instance.
SqlMetaSqlFragment(String type) Creates a new instance.

Method Summary

Methods

Modifier and Type	Method and Description
(package private) void	addElement(SqlMetaIfItem element) Adds a new sub-element.
(package private) void	handleSqlFragment(StringBuilder s, SqlProcessContext ctx) Handle the SQL fragment based on the statement type and/or the SqlMetaSqlFragment.Type.
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.

patternWhere

static final Pattern patternWhere

patternValues

static final Pattern patternValues

patternSet

static final Pattern patternSet

patternColumns

static final Pattern patternColumns

elements

List<SqlMetaIfItem> elements

The list of sub-elements based on ANTLR grammar.

type

SqlMetaSqlFragment.Type type

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

optimistic

boolean optimistic

The indicator for the types WHERE and SET in the case of optimistic locking.

Constructor Detail

SqlMetaSqlFragment

SqlMetaSqlFragment(SqlMetaSqlFragment.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.

SqlMetaSqlFragment

SqlMetaSqlFragment(String 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(SqlMetaIfItem element)

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

Parameters:

element - new sub-element, based on ANTLR grammar

handleSqlFragment

void handleSqlFragment(StringBuilder s,
                     SqlProcessContext ctx)

Handle the SQL fragment based on the statement type and/or the SqlMetaSqlFragment.Type.

Parameters:

s - a buffer for the generated SQL statement

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

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