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* 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.access.trans;
import java.io.IOException;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.cayenne.dba.DbAdapter;
import org.apache.cayenne.dba.QuotingStrategy;
import org.apache.cayenne.map.DbAttribute;
import org.apache.cayenne.query.BatchQuery;
/**
* Translator of InsertBatchQueries.
*/
public class InsertBatchQueryBuilder extends BatchQueryBuilder {
public InsertBatchQueryBuilder(DbAdapter adapter) {
super.setAdapter(adapter);
}
/**
* Binds parameters for the current batch iteration to the PreparedStatement. Performs
* filtering of attributes based on column generation rules.
*
* @since 1.2
*/
@Override
public void bindParameters(PreparedStatement statement, BatchQuery query)
throws SQLException, Exception {
List<DbAttribute> dbAttributes = query.getDbAttributes();
int attributeCount = dbAttributes.size();
// must use an independent counter "j" for prepared statement index
for (int i = 0, j = 0; i < attributeCount; i++) {
DbAttribute attribute = dbAttributes.get(i);
if (includeInBatch(attribute)) {
j++;
Object value = query.getValue(i);
adapter.bindParameter(statement, value, j, attribute.getType(), attribute
.getScale());
}
}
}
/**
* Returns a list of values for the current batch iteration. Performs filtering of
* attributes based on column generation rules. Used primarily for logging.
*
* @since 1.2
*/
@Override
public List<Object> getParameterValues(BatchQuery query) {
List<DbAttribute> attributes = query.getDbAttributes();
int len = attributes.size();
List<Object> values = new ArrayList<Object>(len);
for (int i = 0; i < len; i++) {
DbAttribute attribute = attributes.get(i);
if (includeInBatch(attribute)) {
values.add(query.getValue(i));
}
}
return values;
}
@Override
public String createSqlString(BatchQuery batch) throws IOException {
List<DbAttribute> dbAttributes = batch.getDbAttributes();
boolean status;
if(batch.getDbEntity().getDataMap()!=null && batch.getDbEntity().getDataMap().isQuotingSQLIdentifiers()){
status= true;
} else {
status = false;
}
QuotingStrategy strategy = getAdapter().getQuotingStrategy(status);
StringBuilder query = new StringBuilder("INSERT INTO ");
query.append(strategy.quoteFullyQualifiedName(batch.getDbEntity()));
query.append(" (");
int columnCount = 0;
for (DbAttribute attribute : dbAttributes) {
// attribute inclusion rule - one of the rules below must be true:
// (1) attribute not generated
// (2) attribute is generated and PK and adapter does not support generated
// keys
if (includeInBatch(attribute)) {
if (columnCount > 0) {
query.append(", ");
}
query.append(strategy.quoteString(attribute.getName()));
columnCount++;
}
}
query.append(") VALUES (");
for (int i = 0; i < columnCount; i++) {
if (i > 0) {
query.append(", ");
}
query.append('?');
}
query.append(')');
return query.toString();
}
/**
* Returns true if an attribute should be included in the batch.
*
* @since 1.2
*/
protected boolean includeInBatch(DbAttribute attribute) {
// attribute inclusion rule - one of the rules below must be true:
// (1) attribute not generated
// (2) attribute is generated and PK and adapter does not support generated
// keys
return !attribute.isGenerated()
|| (attribute.isPrimaryKey() && !adapter.supportsGeneratedKeys());
}
}