org.opennms.integration.api.xml.ClasspathXmlLoader Maven / Gradle / Ivy
/*******************************************************************************
* This file is part of OpenNMS(R).
*
* Copyright (C) 2018 The OpenNMS Group, Inc.
* OpenNMS(R) is Copyright (C) 1999-2018 The OpenNMS Group, Inc.
*
* OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
*
* OpenNMS(R) is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* OpenNMS(R) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with OpenNMS(R). If not, see:
* http://www.gnu.org/licenses/
*
* For more information contact:
* OpenNMS(R) Licensing
* http://www.opennms.org/
* http://www.opennms.com/
*******************************************************************************/
package org.opennms.integration.api.xml;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.LinkedList;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ClasspathXmlLoader {
private static final Logger LOG = LoggerFactory.getLogger(ClasspathXmlLoader.class);
private final ClassLoader classLoader;
private final Class objectClazz;
private final String subFolder;
private final String[] fileNames;
public ClasspathXmlLoader(Class clazzForClassloader, Class objectClazz, String subFolder, String... fileNames) {
this.classLoader = Objects.requireNonNull(clazzForClassloader).getClassLoader();
this.objectClazz = Objects.requireNonNull(objectClazz);
this.subFolder = Objects.requireNonNull(subFolder);
this.fileNames = fileNames;
}
public List getObjects() {
final List allObjects = new LinkedList<>();
for (String fileName : fileNames) {
try {
try (InputStream is = classLoader.getResourceAsStream(subFolder + File.separator +fileName)) {
if (is != null) {
final T object = JaxbUtils.fromXml(is, objectClazz);
allObjects.add(object);
}
}
} catch (IOException e) {
LOG.warn("Failed to load {}. Skipping.", fileName, e);
}
}
return allObjects;
}
}