spring CompositeDatabasePopulator 源码
spring CompositeDatabasePopulator 代码
文件路径：/spring-jdbc/src/main/java/org/springframework/jdbc/datasource/init/CompositeDatabasePopulator.java
/*
* Copyright 2002-2021 the original author or authors.
*
* 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
*
* https://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.springframework.jdbc.datasource.init;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import org.springframework.util.Assert;
/**
* Composite {@link DatabasePopulator} that delegates to a list of given
* {@code DatabasePopulator} implementations, executing all scripts.
*
* @author Dave Syer
* @author Juergen Hoeller
* @author Sam Brannen
* @author Kazuki Shimizu
* @since 3.1
*/
public class CompositeDatabasePopulator implements DatabasePopulator {
private final List<DatabasePopulator> populators = new ArrayList<>(4);
/**
* Create an empty {@code CompositeDatabasePopulator}.
* @see #setPopulators
* @see #addPopulators
*/
public CompositeDatabasePopulator() {
}
/**
* Create a {@code CompositeDatabasePopulator} with the given populators.
* @param populators one or more populators to delegate to
* @since 4.3
*/
public CompositeDatabasePopulator(Collection<DatabasePopulator> populators) {
Assert.notNull(populators, "DatabasePopulators must not be null");
this.populators.addAll(populators);
}
/**
* Create a {@code CompositeDatabasePopulator} with the given populators.
* @param populators one or more populators to delegate to
* @since 4.3
*/
public CompositeDatabasePopulator(DatabasePopulator... populators) {
Assert.notNull(populators, "DatabasePopulators must not be null");
this.populators.addAll(Arrays.asList(populators));
}
/**
* Specify one or more populators to delegate to.
*/
public void setPopulators(DatabasePopulator... populators) {
Assert.notNull(populators, "DatabasePopulators must not be null");
this.populators.clear();
this.populators.addAll(Arrays.asList(populators));
}
/**
* Add one or more populators to the list of delegates.
*/
public void addPopulators(DatabasePopulator... populators) {
Assert.notNull(populators, "DatabasePopulators must not be null");
this.populators.addAll(Arrays.asList(populators));
}
@Override
public void populate(Connection connection) throws SQLException, ScriptException {
Assert.notNull(connection, "Connection must not be null");
for (DatabasePopulator populator : this.populators) {
populator.populate(connection);
}
}
}
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