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Java Source Code / Java Documentation » Database ORM » JPOX » org.jpox.store.expression

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.jpox.store.expression .LogicSetExpression

All known Subclasses:   org.jpox.store.expression .TableExprAsSubquery,  org.jpox.store.expression .TableExprAsSubjoins,  org.jpox.store.expression .TableExprAsJoins,
LogicSetExpression
abstract public class LogicSetExpression (Code)
Represents a Set. A collection of objects. For in-depth details read about the mathematical "set" theory. Pragmatically, it represents a SQL table expression as might be listed in the FROM clause of a SELECT statement. A table expression is a fragment of a larger containing QueryStatement.
A table expression has a base "main" table. If that table serves as backing for a Java class, and that class has persistence-capable superclasses, then the table expression may include joins to superclass tables, or may cause such joins to occur in its surrounding QueryStatement.
See Also:   QueryExpression

Field Summary
final protected static Localiser LOCALISER

protected Map embeddedFieldMappings
     Collection of field expressions already created for this table expression.
final protected DatastoreIdentifier mainAlias
     Alias for this table.
final protected DatastoreContainerObject mainTable
     The datastore table underlying this expression.
final protected QueryExpression qs
     Query Expression that this is part of.
protected String sqlText
     The SQL text.

Constructor Summary
protected LogicSetExpression(QueryExpression qs, DatastoreContainerObject mainTable, DatastoreIdentifier alias)
     Constructor.

Method Summary
protected void assertNotFrozen()

public boolean equals(Object obj)

final public DatastoreIdentifier getAlias()
     Accessor for the alias for this table expression.
final public DatastoreObject getMainTable()
     Accessor for the main table for this expression.
public int hashCode()

public ScalarExpression newFieldExpression(String fieldName)
     Accessor for a field expression on this table where the field is actually present in this table.
abstract public String referenceColumn(DatastoreField col)
     Return an identifier/reference to the datastore field/column.
abstract public String toString()


Field Detail
LOCALISER
final protected static Localiser LOCALISER(Code)
Localiser for messages

embeddedFieldMappings
protected Map embeddedFieldMappings(Code)
Collection of field expressions already created for this table expression. Used by nested embedded queries.

mainAlias
final protected DatastoreIdentifier mainAlias(Code)
Alias for this table.

mainTable
final protected DatastoreContainerObject mainTable(Code)
The datastore table underlying this expression.

qs
final protected QueryExpression qs(Code)
Query Expression that this is part of.

sqlText
protected String sqlText(Code)
The SQL text.

Constructor Detail
LogicSetExpression
protected LogicSetExpression(QueryExpression qs, DatastoreContainerObject mainTable, DatastoreIdentifier alias)(Code)
Constructor.
Parameters:
  qs - Query Expression
Parameters:
  mainTable - The main table for this query
Parameters:
  alias - Table alias

Method Detail
assertNotFrozen
protected void assertNotFrozen()(Code)

equals
public boolean equals(Object obj)(Code)

getAlias
final public DatastoreIdentifier getAlias()(Code)
Accessor for the alias for this table expression. The alias

getMainTable
final public DatastoreObject getMainTable()(Code)
Accessor for the main table for this expression. The main table

hashCode
public int hashCode()(Code)

newFieldExpression
public ScalarExpression newFieldExpression(String fieldName)(Code)
Accessor for a field expression on this table where the field is actually present in this table.
Parameters:
  fieldName - Name of the field The field expression

referenceColumn
abstract public String referenceColumn(DatastoreField col)(Code)
Return an identifier/reference to the datastore field/column.
Parameters:
  col - the column to have a reference identifier or fully qualified identifier

toString
abstract public String toString()(Code)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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