use of org.apache.cayenne.ejbql.EJBQLExpression in project cayenne by apache.
the class EJBQLAction method performAction.
@Override
public void performAction(Connection connection, OperationObserver observer) throws SQLException, Exception {
EJBQLCompiledExpression compiledExpression = query.getExpression(dataNode.getEntityResolver());
final EJBQLTranslatorFactory translatorFactory = dataNode.getAdapter().getEjbqlTranslatorFactory();
final EJBQLTranslationContext context = new EJBQLTranslationContext(dataNode.getEntityResolver(), query, compiledExpression, translatorFactory, dataNode.getAdapter().getQuotingStrategy());
compiledExpression.getExpression().visit(new EJBQLBaseVisitor(false) {
@Override
public boolean visitSelect(EJBQLExpression expression) {
EJBQLExpressionVisitor visitor = translatorFactory.getSelectTranslator(context);
expression.visit(visitor);
return false;
}
@Override
public boolean visitDelete(EJBQLExpression expression) {
EJBQLExpressionVisitor visitor = translatorFactory.getDeleteTranslator(context);
expression.visit(visitor);
return false;
}
@Override
public boolean visitUpdate(EJBQLExpression expression) {
EJBQLExpressionVisitor visitor = translatorFactory.getUpdateTranslator(context);
expression.visit(visitor);
return false;
}
});
SQLTemplate sqlQuery = context.getQuery();
// update with metadata
QueryMetadata md = query.getMetaData(dataNode.getEntityResolver());
sqlQuery.setFetchLimit(md.getFetchLimit());
sqlQuery.setFetchOffset(md.getFetchOffset());
sqlQuery.setResult(compiledExpression.getResult());
sqlQuery.setPageSize(md.getPageSize());
if (md.getStatementFetchSize() != 0) {
sqlQuery.setStatementFetchSize(md.getStatementFetchSize());
}
actionFactory.sqlAction(sqlQuery).performAction(connection, observer);
}
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