org.apache.camel.karaf.tooling.upgrade.DefaultValuesProvider Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.camel.karaf.tooling.upgrade;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.Optional;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DefaultValuesProvider {
private static final Logger LOG = LoggerFactory.getLogger(DefaultValuesProvider.class);
private static final String CAMEL_ROOT_KEY = "camel.root";
private static final String CAMEL_KARAF_ROOT_KEY = "camel.karaf.root";
private static final String CAMEL_VERSION_KEY = "camel.version";
private final Properties defaultValues;
public DefaultValuesProvider(String path) {
this.defaultValues = loadDefaultValues(path);
}
private static Properties loadDefaultValues(String path) {
LOG.debug("Loading default values from {}", path);
Properties properties = new Properties();
File file = new File(path);
if (file.exists()) {
LOG.debug("Loading default values from {}", file);
try (FileReader reader = new FileReader(file)) {
properties.load(reader);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
return properties;
}
private Optional getDefaultValue(String key) {
return Optional.ofNullable(defaultValues.get(key))
.map(Object::toString)
.map(String::trim)
.filter(s -> !s.isEmpty());
}
public Optional getDefaultCamelRoot() {
return getDefaultValue(CAMEL_ROOT_KEY);
}
public Optional getDefaultCamelKarafRoot() {
return getDefaultValue(CAMEL_KARAF_ROOT_KEY);
}
public Optional getDefaultCamelVersion() {
return getDefaultValue(CAMEL_VERSION_KEY);
}
}