org.ops4j.pax.jdbc.common.BeanConfig 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.ops4j.pax.jdbc.common;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
/**
* Configure a java bean from a given Map of properties.
*/
public class BeanConfig {
private Object bean;
private Map setters;
private BeanConfig(Object bean) {
this.bean = bean;
this.setters = findSettersForBean(bean);
}
private static Map findSettersForBean(Object bean) {
Map setters = new HashMap();
for (Method method : bean.getClass().getMethods()) {
String name = method.getName();
if (name.startsWith("set") && method.getParameterTypes().length == 1) {
String key1 = name.substring(3, 4).toLowerCase() + name.substring(4);
String key2 = name.substring(3, 4) + name.substring(4);
setters.put(key1, method);
setters.put(key2, method);
}
}
return setters;
}
/**
* Configure a java bean from a given {@link Properties}.
*
* @param bean
* bean to populate
* @param props
* properties to set.
*/
public static void configure(Object bean, Properties props) {
final Map map = new HashMap<>();
for (String key : props.stringPropertyNames()) {
map.put(key, props.getProperty(key));
}
BeanConfig.configure(bean, map);
}
/**
* Configure a java bean from a given Map of properties.
*
* @param bean
* bean to populate
* @param props
* properties to set. The keys in the Map have to match the bean property names.
*/
public static void configure(Object bean, Map props) {
BeanConfig beanConfig = new BeanConfig(bean);
for (String key : props.keySet()) {
beanConfig.trySetProperty(key, props.get(key));
}
}
private void trySetProperty(String key, String value) {
try {
Method method = setters.get(key);
if (method == null) {
throw new IllegalArgumentException("No setter in " + bean.getClass()
+ " for property " + key);
}
Class paramClass = method.getParameterTypes()[0];
if (paramClass == int.class || paramClass == Integer.class) {
method.invoke(bean, Integer.parseInt(value));
}
else if (paramClass == long.class || paramClass == Long.class) {
method.invoke(bean, Long.parseLong(value));
}
else if (paramClass == boolean.class || paramClass == Boolean.class) {
method.invoke(bean, Boolean.parseBoolean(value));
}
else if (paramClass == String.class) {
method.invoke(bean, value);
}
}
catch (Exception e) {
throw new IllegalArgumentException("Error setting property " + key + ":"
+ e.getMessage(), e);
}
}
}