Mercurial > hg > release > thermostat-1.0
view storage/mongo/src/main/java/com/redhat/thermostat/storage/mongodb/internal/MongoPojoConverter.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
---|---|
date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | ccac9bcabaa0 |
children |
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/* * Copyright 2012-2014 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.storage.mongodb.internal; import java.beans.PropertyDescriptor; import java.lang.reflect.Array; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; import java.util.Set; import org.apache.commons.beanutils.PropertyUtils; import com.mongodb.BasicDBObject; import com.mongodb.DBObject; import com.redhat.thermostat.storage.core.Persist; import com.redhat.thermostat.storage.core.StorageException; import com.redhat.thermostat.storage.model.Pojo; class MongoPojoConverter { public DBObject convertPojoToMongo(Pojo obj) { try { return convertPojoToMongoImpl(obj); } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException ex) { throw new StorageException(ex); } } private DBObject convertPojoToMongoImpl(Pojo obj) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { BasicDBObject dbObj = new BasicDBObject(); PropertyDescriptor[] descs = PropertyUtils.getPropertyDescriptors(obj); for (PropertyDescriptor desc : descs) { storePropertyToDBObject(obj, dbObj, desc); } return dbObj; } private void storePropertyToDBObject(Pojo obj, BasicDBObject dbObj, PropertyDescriptor desc) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { if (hasPersistentAnnotation(desc)) { String name = desc.getName(); Object value = PropertyUtils.getProperty(obj, name); if (desc.getPropertyType().isArray()) { value = convertIndexedProperty(value); } if (value instanceof Pojo) { value = convertPojoToMongoImpl((Pojo) value); } dbObj.put(name, value); } } private Object convertIndexedProperty(Object values) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException { int length = Array.getLength(values); List list = new ArrayList(length); for (int i = 0; i < length; i++) { Object value = Array.get(values, i); if (value instanceof Pojo) { value = convertPojoToMongoImpl((Pojo) value); } list.add(value); } return list; } public <T extends Pojo> T convertMongoToPojo(DBObject dbObj, Class<T> pojoClass) { try { return convertMongoToPojoImpl(dbObj, pojoClass); } catch (IllegalAccessException | InstantiationException | InvocationTargetException | NoSuchMethodException ex) { throw new StorageException(ex); } } private <T extends Pojo> T convertMongoToPojoImpl(DBObject dbObj, Class pojoClass) throws InstantiationException, IllegalAccessException, InvocationTargetException, NoSuchMethodException { if (dbObj == null) { return null; } T pojo = (T) pojoClass.newInstance(); Set<String> keys = dbObj.keySet(); for (String name : keys) { if (! name.equals("_id")) { storePropertyToPojo(dbObj, pojo, name); } } return pojo; } private <T extends Pojo> void storePropertyToPojo(DBObject dbObj, T pojo, String name) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException, InstantiationException { PropertyDescriptor desc = PropertyUtils.getPropertyDescriptor(pojo, name); if (hasPersistentAnnotation(desc)) { Object value = dbObj.get(name); if (desc.getPropertyType().isArray()) { value = convertIndexedPropertyFromMongo(desc, (List) value); } if (value instanceof DBObject) { value = convertMongoToPojoImpl((DBObject) value, desc.getPropertyType()); } PropertyUtils.setProperty(pojo, name, value); } else { throw new StorageException("no available mapping for extra property: '" + name + "' in " + pojo.getClass().getName()); } } private Object convertIndexedPropertyFromMongo(PropertyDescriptor desc, List values) throws InstantiationException, IllegalAccessException, InvocationTargetException, NoSuchMethodException { Class componentType = desc.getPropertyType().getComponentType(); Object array = Array.newInstance(componentType, values.size()); int i = 0; for (Object value : values) { if (value instanceof DBObject) { value = convertMongoToPojoImpl((DBObject) value, componentType); } Array.set(array, i, value); i++; } return array; } private boolean hasPersistentAnnotation(PropertyDescriptor desc) { if (desc == null) { return false; } Method writeMethod = desc.getWriteMethod(); Method readMethod = desc.getReadMethod(); return writeMethod != null && writeMethod.isAnnotationPresent(Persist.class) && readMethod != null && readMethod.isAnnotationPresent(Persist.class); } }