de.mhus.lib.adb.util.DbProperties Maven / Gradle / Ivy
/**
* Copyright 2018 Mike Hummel
*
* 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 de.mhus.lib.adb.util;
import de.mhus.lib.adb.DbManager;
import de.mhus.lib.errors.MException;
/**
* A simple key - value properties implementation.
*
* @author mikehummel
* @version $Id: $Id
*/
public class DbProperties {
private DbManager manager;
private String registryName;
@SuppressWarnings("unused")
private String dump;
/**
* Constructor for DbProperties.
*
* @param manager a {@link de.mhus.lib.adb.DbManager} object.
* @param registryName a {@link java.lang.String} object.
*/
public DbProperties(DbManager manager, String registryName) {
this.manager = manager;
this.registryName = registryName;
}
/**
* get.
*
* @param key a {@link java.lang.String} object.
* @return a {@link java.lang.String} object.
* @throws de.mhus.lib.errors.MException if any.
*/
public String get(String key) throws MException {
Property prop = (Property) manager.getObject(registryName, key);
if (prop == null) return null;
return prop.getValue();
}
/**
* set.
*
* @param key a {@link java.lang.String} object.
* @param value a {@link java.lang.String} object.
* @return a {@link java.lang.String} object.
* @throws de.mhus.lib.errors.MException if any.
*/
public String set(String key, String value) throws MException {
Property prop = (Property) manager.getObject(registryName, key);
if (prop == null) {
prop = new Property();
prop.setKey(key);
prop.setValue(value);
manager.createObject(registryName, prop);
return null;
}
String oldValue = prop.getValue();
prop.setValue(value);
manager.saveObject(registryName, prop);
dump = null;
return oldValue;
}
/**
* remove.
*
* @param key a {@link java.lang.String} object.
* @return a {@link java.lang.String} object.
* @throws de.mhus.lib.errors.MException if any.
*/
public String remove(String key) throws MException {
Property prop = (Property) manager.getObject(registryName, key);
if (prop == null) {
return null;
}
String oldValue = prop.getValue();
manager.deleteObject(registryName, prop);
dump = null;
return oldValue;
}
// public String toString() {
// if (dump == null) {
// try {
// TreeMap tree = new TreeMap();
// DbCollection res = manager.getByQualification(null, new Property(),
// registryName, "", null);
// for (Property p : res) tree.put(p.getKey(), p.getValue());
// res.close();
// dump = tree.toString() + "@DbProperties";
// } catch (MException e) {
// dump = e.toString() + "@DbProperties";
// }
// }
// return dump;
// }
}