InformixAdapt

package nb;

import java.util.List;

import org.apache.cayenne.access.translator.ejbql.EJBQLConditionTranslator;
import org.apache.cayenne.access.translator.ejbql.EJBQLTranslationContext;
import org.apache.cayenne.access.translator.ejbql.EJBQLTranslatorFactory;
import org.apache.cayenne.access.translator.ejbql.JdbcEJBQLTranslatorFactory;
import org.apache.cayenne.access.types.ExtendedType;
import org.apache.cayenne.access.types.ExtendedTypeFactory;
import org.apache.cayenne.configuration.RuntimeProperties;
import org.apache.cayenne.dba.JdbcAdapter;
import org.apache.cayenne.di.Inject;
import org.apache.cayenne.ejbql.EJBQLExpression;
import org.apache.cayenne.ejbql.EJBQLExpressionVisitor;
import org.apache.cayenne.resource.ResourceLocator;

public class InformixAdapter extends JdbcAdapter {

	public InformixAdapter( @Inject RuntimeProperties runtimeProperties, @Inject( "cayenne.server.default_types" ) List<ExtendedType> defaultExtendedTypes, @Inject( "cayenne.server.user_types" ) List<ExtendedType> userExtendedTypes, @Inject( "cayenne.server.type_factories" ) List<ExtendedTypeFactory> extendedTypeFactories, @Inject ResourceLocator resourceLocator) {
		super( runtimeProperties, defaultExtendedTypes, userExtendedTypes, extendedTypeFactories, resourceLocator );
	}

	@Override
	public EJBQLTranslatorFactory getEjbqlTranslatorFactory() {
		return new InformixEJBQLTranslatorFactory();
	}

	private static class InformixEJBQLTranslatorFactory extends JdbcEJBQLTranslatorFactory {

		@Override
		public EJBQLExpressionVisitor getConditionTranslator( EJBQLTranslationContext context ) {
			return new InformixEJBQLConditionTranslator( context );
		}
	}

	private static class InformixEJBQLConditionTranslator extends EJBQLConditionTranslator {

		protected InformixEJBQLConditionTranslator( EJBQLTranslationContext context ) {
			super( context );
		}

		@Override
		public boolean visitUpper( EJBQLExpression expression, int finishedChildIndex ) {

			if( finishedChildIndex < 0 ) {
				context.append( " UPPER(" );
			}
			else if( finishedChildIndex + 1 == expression.getChildrenCount() ) {
				context.append( ")" );
			}

			return true;
		}
	}
}