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ScanningJavaMigrationResolver.java
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ScanningJavaMigrationResolver.java
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/*
* Copyright 2010-2019 Boxfuse GmbH
*
* 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.flywaydb.core.internal.resolver.java;
import org.flywaydb.core.api.configuration.Configuration;
import org.flywaydb.core.api.migration.JavaMigration;
import org.flywaydb.core.api.resolver.Context;
import org.flywaydb.core.api.resolver.MigrationResolver;
import org.flywaydb.core.api.resolver.ResolvedMigration;
import org.flywaydb.core.internal.clazz.ClassProvider;
import org.flywaydb.core.internal.resolver.ResolvedMigrationComparator;
import org.flywaydb.core.internal.util.ClassUtils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Migration resolver for Java-based migrations. The classes must have a name like R__My_description, V1__Description
* or V1_1_3__Description.
*/
public class ScanningJavaMigrationResolver implements MigrationResolver {
/**
* The Scanner to use.
*/
private final ClassProvider<JavaMigration> classProvider;
/**
* The configuration to inject (if necessary) in the migration classes.
*/
private final Configuration configuration;
/**
* Creates a new instance.
*
* @param classProvider The class provider.
* @param configuration The configuration to inject (if necessary) in the migration classes.
*/
public ScanningJavaMigrationResolver(ClassProvider<JavaMigration> classProvider, Configuration configuration) {
this.classProvider = classProvider;
this.configuration = configuration;
}
@Override
public List<ResolvedMigration> resolveMigrations(Context context) {
List<ResolvedMigration> migrations = new ArrayList<>();
for (Class<?> clazz : classProvider.getClasses()) {
JavaMigration javaMigration = ClassUtils.instantiate(clazz.getName(), configuration.getClassLoader());
migrations.add(new ResolvedJavaMigration(javaMigration));
}
Collections.sort(migrations, new ResolvedMigrationComparator());
return migrations;
}
}