jodd.db.oom.sqlgen.chunks
Class ColumnsSelectChunk

java.lang.Object
  jodd.db.oom.sqlgen.chunks.SqlChunk
      jodd.db.oom.sqlgen.chunks.ColumnsSelectChunk

All Implemented Interfaces:

java.lang.Cloneable

public class ColumnsSelectChunk
extends SqlChunk

Columns select chunk resolves entity column(s) from column references. Should be used for SELECT queries.

Column reference is specified as: tableReference.propertyName where property name is a property of the entity references by table reference. Result is rendered as: tableName.column or alias.column (if table has an alias).

There are some special values for propertyName

wildcard (*), all table columns will be listed

id sign (+), all table id columns will be listed

If previous chunk is also a column chunk, comma separator will be added in between.

Note that column alias are appended to the column name (using 'as' construct).

Macro rules:

$C{tableRef} is rendered as FOO.col1, FOO.col2,...

$C{tableRef.*} is equal to above, renders all entity columns

$C{tableRef.+} renders to only identity columns

$C{tableRef.colRef} is rendered as FOO.column

$C{entityRef.colRef} renders to FOO$column

Field Summary

protected java.lang.String	columnRef
protected java.lang.String	hint
protected int	includeColumns
protected java.lang.String	tableRef

Fields inherited from class jodd.db.oom.sqlgen.chunks.SqlChunk

CHUNK_INSERT, CHUNK_MATCH, CHUNK_RAW, CHUNK_REFERENCE, CHUNK_SELECT_COLUMNS, CHUNK_TABLE, CHUNK_UPDATE, CHUNK_VALUE, chunkType, COLS_ALL, COLS_NA, COLS_ONLY_EXISTING, COLS_ONLY_IDS, nextChunk, previousChunk, templateData

Constructor Summary

	ColumnsSelectChunk(java.lang.String reference)
	ColumnsSelectChunk(java.lang.String tableRef, boolean includeAll)
	ColumnsSelectChunk(java.lang.String tableRef, java.lang.String columnRef)
protected	ColumnsSelectChunk(java.lang.String tableRef, java.lang.String columnRef, int includeColumns, java.lang.String hint)

Method Summary

protected void	appendAlias(java.lang.StringBuilder query, DbEntityDescriptor ded, java.lang.String column) Appends alias.
protected void	appendColumnName(java.lang.StringBuilder query, DbEntityDescriptor ded, java.lang.String column) Simply appends column name with optional table reference and alias.
SqlChunk	clone() Clones all parsed chunk data to an instance that is ready for processing.
void	init(TemplateData templateData) Counts actual real hints.
void	process(java.lang.StringBuilder out) Process the chunk and appends data to the output.

Methods inherited from class jodd.db.oom.sqlgen.chunks.SqlChunk

appendMissingSpace, defineParameter, findColumnRef, getNextChunk, getPreviousChunk, insertChunkAfter, isPreviousChunkOfSameType, isPreviousChunkOfType, isPreviousMacroChunk, isPreviousRawChunk, lookupName, lookupTableRef, lookupTableRef, lookupType, resolveClass, resolveTable, separateByCommaOrSpace

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

tableRef

protected final java.lang.String tableRef

columnRef

protected final java.lang.String columnRef

includeColumns

protected final int includeColumns

hint

protected final java.lang.String hint

Constructor Detail

ColumnsSelectChunk

protected ColumnsSelectChunk(java.lang.String tableRef,
                             java.lang.String columnRef,
                             int includeColumns,
                             java.lang.String hint)

ColumnsSelectChunk

public ColumnsSelectChunk(java.lang.String tableRef,
                          java.lang.String columnRef)

ColumnsSelectChunk

public ColumnsSelectChunk(java.lang.String tableRef,
                          boolean includeAll)

ColumnsSelectChunk

public ColumnsSelectChunk(java.lang.String reference)

Method Detail

init

public void init(TemplateData templateData)

Counts actual real hints.

Overrides:

init in class SqlChunk

process

public void process(java.lang.StringBuilder out)

Description copied from class: SqlChunk

Process the chunk and appends data to the output.

Specified by:

process in class SqlChunk

appendAlias

protected void appendAlias(java.lang.StringBuilder query,
                           DbEntityDescriptor ded,
                           java.lang.String column)

Appends alias.

appendColumnName

protected void appendColumnName(java.lang.StringBuilder query,
                                DbEntityDescriptor ded,
                                java.lang.String column)

Simply appends column name with optional table reference and alias.

clone

public SqlChunk clone()

Description copied from class: SqlChunk

Clones all parsed chunk data to an instance that is ready for processing.

Specified by:

clone in class SqlChunk