/*
* Copyright 2011 The Apache Software Foundation
*
* 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.lealone.command;
import java.util.ArrayList;
import org.lealone.command.CommandInterface;
import org.lealone.engine.Session;
import org.lealone.expression.Parameter;
import org.lealone.expression.ParameterInterface;
import org.lealone.message.DbException;
import org.lealone.result.ResultInterface;
import org.lealone.value.Value;
public class BackendBatchCommand implements CommandInterface {
private Session session;
private ArrayList<String> batchCommands; //对应JdbcStatement.executeBatch()
private ArrayList<Value[]> batchParameters; //对应JdbcPreparedStatement.executeBatch()
private Command preparedCommand;
private int[] result;
public BackendBatchCommand(Session session, ArrayList<String> batchCommands) {
this.session = session;
this.batchCommands = batchCommands;
}
public BackendBatchCommand(Session session, Command preparedCommand, ArrayList<Value[]> batchParameters) {
this.session = session;
this.preparedCommand = preparedCommand;
this.batchParameters = batchParameters;
}
@Override
public int getCommandType() {
return UNKNOWN;
}
@Override
public boolean isQuery() {
return false;
}
@Override
public ArrayList<? extends ParameterInterface> getParameters() {
throw DbException.throwInternalError();
}
@Override
public ResultInterface executeQuery(int maxRows, boolean scrollable) {
throw DbException.throwInternalError();
}
@Override
public int executeUpdate() {
if (batchCommands != null) {
int size = batchCommands.size();
result = new int[size];
for (int i = 0; i < size; i++) {
Command c = session.prepareCommand(batchCommands.get(i));
result[i] = c.executeUpdate();
c.close();
}
} else {
int size = batchParameters.size();
result = new int[size];
Value[] values;
ArrayList<? extends ParameterInterface> params = preparedCommand.getParameters();
int paramsSize = params.size();
for (int i = 0; i < size; i++) {
values = batchParameters.get(i);
for (int j = 0; j < paramsSize; j++) {
Parameter p = (Parameter) params.get(j);
p.setValue(values[j], true);
}
result[i] = preparedCommand.executeUpdate();
}
}
return 0;
}
@Override
public void close() {
if (session == null || session.isClosed()) {
return;
}
session = null;
if (batchCommands != null) {
batchCommands.clear();
batchCommands = null;
}
if (batchParameters != null) {
batchParameters.clear();
batchParameters = null;
}
result = null;
}
@Override
public void cancel() {
}
@Override
public ResultInterface getMetaData() {
throw DbException.throwInternalError();
}
public int[] getResult() {
return result;
}
}