/*
* Copyright 2011 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.data.util.sqlcontainer.query.generator.filter;
import com.vaadin.data.Container.Filter;
import com.vaadin.data.util.filter.IsNull;
import com.vaadin.data.util.sqlcontainer.query.generator.StatementHelper;
public class IsNullTranslator implements FilterTranslator {
public boolean translatesFilter(Filter filter) {
return filter instanceof IsNull;
}
public String getWhereStringForFilter(Filter filter, StatementHelper sh) {
IsNull in = (IsNull) filter;
return QueryBuilder.quote(in.getPropertyId()) + " IS NULL";
}
}