com.samskivert.jdbc.depot.clause
Class SelectClause<T extends PersistentRecord>

java.lang.Object
  com.samskivert.jdbc.depot.clause.QueryClause
      com.samskivert.jdbc.depot.clause.SelectClause<T>

All Implemented Interfaces:

SQLExpression

public class SelectClause<T extends PersistentRecord>
extends QueryClause

Builds actual SQL given a main persistent type and some QueryClause objects.

Field Summary

protected Map<String,FieldDefinition>	_disMap Persistent class fields mapped to field override clauses.
protected String[]	_fields The persistent fields to select.
protected ForUpdate	_forUpdate The For Update clause, if any.
protected FromOverride	_fromOverride The from override clause, if any.
protected GroupBy	_groupBy The group by clause, if any.
protected List<Join>	_joinClauses A list of join clauses, each potentially referencing a new class.
protected Limit	_limit The limit clause, if any.
protected OrderBy	_orderBy The order by clause, if any.
protected Class<T>	_pClass The persistent class this select defines.
protected WhereClause	_where The where clause.

Constructor Summary

SelectClause(Class<T> pClass, String[] fields, List<QueryClause> clauses)
Creates a new Query object to generate one or more instances of the specified persistent class, as dictated by the key and query clauses.

SelectClause(Class<T> pClass, String[] fields, QueryClause... clauses)
A varargs version of the constructor.

Method Summary

void	accept(ExpressionVisitor builder) Most uses of this class have been implemented with a visitor pattern.
void	addClasses(Collection<Class<? extends PersistentRecord>> classSet) Adds all persistent classes that are brought into the SQL context by this clause: FROM clauses, JOINs, UPDATEs, anything that could create a new table abbreviation.
Collection<FieldDefinition>	getFieldDefinitions()
String[]	getFields()
ForUpdate	getForUpdate()
FromOverride	getFromOverride()
GroupBy	getGroupBy()
List<Join>	getJoinClauses()
Limit	getLimit()
OrderBy	getOrderBy()
Class<T>	getPersistentClass()
WhereClause	getWhereClause()
FieldDefinition	lookupDefinition(String field)

Methods inherited from class java.lang.Object

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

Field Detail

_disMap

protected Map<String,FieldDefinition> _disMap

Persistent class fields mapped to field override clauses.

_pClass

protected Class<T extends PersistentRecord> _pClass

The persistent class this select defines.

_fields

protected String[] _fields

The persistent fields to select.

_fromOverride

protected FromOverride _fromOverride

The from override clause, if any.

_where

protected WhereClause _where

The where clause.

_joinClauses

protected List<Join> _joinClauses

A list of join clauses, each potentially referencing a new class.

_orderBy

protected OrderBy _orderBy

The order by clause, if any.

_groupBy

protected GroupBy _groupBy

The group by clause, if any.

_limit

protected Limit _limit

The limit clause, if any.

_forUpdate

protected ForUpdate _forUpdate

The For Update clause, if any.

Constructor Detail

SelectClause

public SelectClause(Class<T> pClass,
                    String[] fields,
                    List<QueryClause> clauses)

Creates a new Query object to generate one or more instances of the specified persistent class, as dictated by the key and query clauses. A persistence context is supplied for instantiation of marshallers, which may trigger table creations and schema migrations.

SelectClause

public SelectClause(Class<T> pClass,
                    String[] fields,
                    QueryClause... clauses)

A varargs version of the constructor.

Method Detail

lookupDefinition

public FieldDefinition lookupDefinition(String field)

getFieldDefinitions

public Collection<FieldDefinition> getFieldDefinitions()

getPersistentClass

public Class<T> getPersistentClass()

getFields

public String[] getFields()

getFromOverride

public FromOverride getFromOverride()

getWhereClause

public WhereClause getWhereClause()

getJoinClauses

public List<Join> getJoinClauses()

getOrderBy

public OrderBy getOrderBy()

getGroupBy

public GroupBy getGroupBy()

getLimit

public Limit getLimit()

getForUpdate

public ForUpdate getForUpdate()

addClasses

public void addClasses(Collection<Class<? extends PersistentRecord>> classSet)

Description copied from interface: SQLExpression

Adds all persistent classes that are brought into the SQL context by this clause: FROM clauses, JOINs, UPDATEs, anything that could create a new table abbreviation. This method should recurse into any subordinate state that may in turn bring in new classes so that sub-queries work correctly.

accept

public void accept(ExpressionVisitor builder)
            throws Exception

Description copied from interface: SQLExpression

Most uses of this class have been implemented with a visitor pattern. Create your own ExpressionVisitor and call this method with it.

Throws:

Exception

See Also:

SQLBuilder