/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cayenne.dbsync.merge.token;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.cayenne.access.translator.ParameterBinding;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.map.DbEntity;
public class DefaultValueForNullProvider implements ValueForNullProvider {
private Map<String, ParameterBinding> values = new HashMap<>();
public void set(DbEntity entity, DbAttribute column, Object value, int type) {
values.put(createKey(entity, column), new ParameterBinding(value, type, column
.getAttributePrecision()));
}
protected ParameterBinding get(DbEntity entity, DbAttribute column) {
return values.get(createKey(entity, column));
}
public List<String> createSql(DbEntity entity, DbAttribute column) {
ParameterBinding value = get(entity, column);
if (value == null) {
return Collections.emptyList();
}
// TODO: change things so it is possible to use prepared statements here
return Collections.singletonList("UPDATE " + entity.getFullyQualifiedName()
+ " SET " + column.getName() + "='" + value.getValue() + "' WHERE " + column.getName() + " IS NULL");
}
public boolean hasValueFor(DbEntity entity, DbAttribute column) {
return values.containsKey(createKey(entity, column));
}
private String createKey(DbEntity entity, DbAttribute attribute) {
return (entity.getFullyQualifiedName() + "." + attribute.getName()).toUpperCase();
}
}