com.contrastsecurity.cassandra.migration.utils.scanner.Scanner Maven / Gradle / Ivy
/**
* Copyright 2010-2015 Axel Fontaine
*
* 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 com.contrastsecurity.cassandra.migration.utils.scanner;
import com.contrastsecurity.cassandra.migration.CassandraMigrationException;
import com.contrastsecurity.cassandra.migration.config.ScriptsLocation;
import com.contrastsecurity.cassandra.migration.utils.scanner.classpath.ClassPathScanner;
import com.contrastsecurity.cassandra.migration.utils.scanner.filesystem.FileSystemScanner;
/**
* Scanner for Resources and Classes.
*/
public class Scanner {
private final ClassLoader classLoader;
public Scanner(ClassLoader classLoader) {
this.classLoader = classLoader;
}
/**
* Scans this location for resources, starting with the specified prefix and ending with the specified suffix.
*
* @param location The location to start searching. Subdirectories are also searched.
* @param prefix The prefix of the resource names to match.
* @param suffix The suffix of the resource names to match.
* @return The resources that were found.
*/
public Resource[] scanForResources(ScriptsLocation location, String prefix, String suffix) {
try {
if (location.isFileSystem()) {
return new FileSystemScanner().scanForResources(location.getPath(), prefix, suffix);
}
return new ClassPathScanner(classLoader).scanForResources(location.getPath(), prefix, suffix);
} catch (Exception e) {
throw new CassandraMigrationException("Unable to scan for CQL migrations in location: " + location, e);
}
}
/**
* Scans the classpath for concrete classes under the specified package implementing this interface.
* Non-instantiable abstract classes are filtered out.
*
* @param location The location (package) in the classpath to start scanning.
* Subpackages are also scanned.
* @param implementedInterface The interface the matching classes should implement.
* @return The non-abstract classes that were found.
* @throws Exception when the location could not be scanned.
*/
public Class[] scanForClasses(ScriptsLocation location, Class implementedInterface) throws Exception {
return new ClassPathScanner(classLoader).scanForClasses(location.getPath(), implementedInterface);
}
}