org.apache.cayenne.dba.openbase
Class OpenBaseQualifierTranslator

java.lang.Object
  org.apache.cayenne.access.trans.QueryAssemblerHelper
      org.apache.cayenne.access.trans.QualifierTranslator
          org.apache.cayenne.dba.openbase.OpenBaseQualifierTranslator

All Implemented Interfaces:

TraversalHandler

public class OpenBaseQualifierTranslator
extends QualifierTranslator

Translates query qualifier to SQL. Used as a helper class by query translators.

Since:

1.1

Author:

Mike Kienenberger, Andrei Adamchik

Field Summary

Fields inherited from class org.apache.cayenne.access.trans.QualifierTranslator

matchingObject, objectMatchTranslator, qualBuf, translateParentQual

Fields inherited from class org.apache.cayenne.access.trans.QueryAssemblerHelper

queryAssembler

Constructor Summary

OpenBaseQualifierTranslator()

OpenBaseQualifierTranslator(QueryAssembler queryAssembler)

Method Summary

protected void	appendLiteralDirect(java.lang.StringBuffer buf, java.lang.Object val, DbAttribute attr, Expression parentExpression) Appends SQL code to the query buffer to handle val as a parameter to the PreparedStatement being built.
void	endNode(Expression node, Expression parentNode) Called during the traversal after an expression node children processing is finished.
void	finishedChild(Expression node, int childIndex, boolean hasMoreChildren) Opportunity to insert an operation
void	startNode(Expression node, Expression parentNode) Called during the traversal before an expression node children processing is started.

Methods inherited from class org.apache.cayenne.access.trans.QualifierTranslator

appendLiteral, appendObjectMatch, detectObjectMatch, doTranslation, extractQualifier, getObjEntity, isTranslateParentQual, objectNode, parenthesisNeeded, processRelTermination, setTranslateParentQual

Methods inherited from class org.apache.cayenne.access.trans.QueryAssemblerHelper

appendDbPath, appendObjPath, getDbEntity, getQueryAssembler, paramsDbType, processColumn, processColumn, processColumn, processRelTermination, setQueryAssembler

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenBaseQualifierTranslator

public OpenBaseQualifierTranslator()

OpenBaseQualifierTranslator

public OpenBaseQualifierTranslator(QueryAssembler queryAssembler)

Method Detail

startNode

public void startNode(Expression node,
                      Expression parentNode)

Description copied from interface: TraversalHandler

Called during the traversal before an expression node children processing is started.

Specified by:

startNode in interface TraversalHandler

Overrides:

startNode in class QualifierTranslator

endNode

public void endNode(Expression node,
                    Expression parentNode)

Description copied from interface: TraversalHandler

Called during the traversal after an expression node children processing is finished.

Specified by:

endNode in interface TraversalHandler

Overrides:

endNode in class QualifierTranslator

appendLiteralDirect

protected void appendLiteralDirect(java.lang.StringBuffer buf,
                                   java.lang.Object val,
                                   DbAttribute attr,
                                   Expression parentExpression)

Description copied from class: QueryAssemblerHelper

Appends SQL code to the query buffer to handle val as a parameter to the PreparedStatement being built. Adds val into QueryAssembler parameter list.

Overrides:

appendLiteralDirect in class QueryAssemblerHelper

Parameters:

buf - query buffer

val - object that should be appended as a literal to the query. Must be of one of "standard JDBC" types. Can not be null.

finishedChild

public void finishedChild(Expression node,
                          int childIndex,
                          boolean hasMoreChildren)

Description copied from class: QualifierTranslator

Opportunity to insert an operation

Specified by:

finishedChild in interface TraversalHandler

Overrides:

finishedChild in class QualifierTranslator