Java tutorial
/* * Copyright 2014 astamuse company,Ltd. * * 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.astamuse.asta4d.web.initialization; import java.io.InputStream; import java.lang.reflect.InvocationTargetException; import java.util.Iterator; import org.apache.commons.beanutils.BeanUtilsBean; import org.apache.commons.beanutils.ConvertUtilsBean; import org.apache.commons.beanutils.PropertyUtils; import org.apache.commons.configuration.PropertiesConfiguration; import com.astamuse.asta4d.web.WebApplicationConfiguration; public class SimplePropertyFileInitializer implements Initializer { @Override public void initliaze(InputStream input, WebApplicationConfiguration configuration) throws Exception { PropertiesConfiguration pc = new PropertiesConfiguration(); pc.load(input); BeanUtilsBean bu = retrieveBeanUtilsBean(); Iterator<String> keys = pc.getKeys(); while (keys.hasNext()) { String key = keys.next(); String value = pc.getString(key); fillConfiguration(configuration, bu, key, value); } } protected BeanUtilsBean retrieveBeanUtilsBean() { BeanUtilsBean bu = new BeanUtilsBean(new ConvertUtilsBean() { @SuppressWarnings({ "rawtypes", "unchecked" }) @Override public Object convert(String value, Class clazz) { if (clazz.isEnum()) { return Enum.valueOf(clazz, value); } else if (clazz.equals(Class.class)) { try { return Class.forName(value); } catch (Exception e) { throw new RuntimeException(e); } } else if (expectInstance(clazz)) { try { return Class.forName(value).newInstance(); } catch (Exception e) { throw new RuntimeException(e); } } else { return super.convert(value, clazz); } } }); return bu; } @SuppressWarnings("rawtypes") protected boolean expectInstance(Class clz) { Package pkg = clz.getPackage(); if (pkg == null) { return false; } else { return pkg.getName().startsWith("com.astamuse.asta4d."); } } @SuppressWarnings("rawtypes") protected void fillConfiguration(WebApplicationConfiguration conf, BeanUtilsBean beanUtil, String key, String value) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { Class cls = PropertyUtils.getPropertyType(conf, key); if (cls.isArray()) { String[] values = value.split(","); beanUtil.setProperty(conf, key, values); } else { beanUtil.setProperty(conf, key, value); } } }