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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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 org.apache.tuscany.das.rdb.impl;
import java.io.IOException;
import java.io.InputStream;
import org.apache.tuscany.das.rdb.ApplyChangesCommand;
import org.apache.tuscany.das.rdb.Command;
import org.apache.tuscany.das.rdb.CommandFactory;
import org.apache.tuscany.das.rdb.config.Config;
import org.apache.tuscany.das.rdb.util.ConfigUtil;
public class CommandFactoryImpl implements CommandFactory {
public Command createCommand(String sql) {
return baseCreateCommand(sql, null);
}
public Command createCommand(String sql, InputStream configStream) {
return baseCreateCommand(sql, ConfigUtil.loadConfig(configStream));
}
public Command createCommand(String sql, Config config) {
return baseCreateCommand(sql, config);
}
public ApplyChangesCommand createApplyChangesCommand() {
return new ApplyChangesCommandImpl();
}
public ApplyChangesCommand createApplyChangesCommand(InputStream configStream) throws IOException {
return new ApplyChangesCommandImpl(ConfigUtil.loadConfig(configStream));
}
public ApplyChangesCommand createApplyChangesCommand(Config config) {
return new ApplyChangesCommandImpl(config);
}
// Utilities
private Command baseCreateCommand(String sql, Config config) {
sql = sql.trim(); // Remove leading white space
char firstChar = Character.toUpperCase(sql.charAt(0));
switch (firstChar) {
case 'S':
return new ReadCommandImpl(sql, config);
case 'I':
return new InsertCommandImpl(sql);
case 'U':
return new UpdateCommandImpl(sql);
case 'D':
return new DeleteCommandImpl(sql);
case '{':
return new SPCommandImpl(sql, config);
default:
throw new Error("SQL => " + sql + " is not valid");
}
}
}
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