/*
* datatandroid - Persistence framework for Android platform
*
* Copyright (C) 2010 ProjectsException
* <http://code.google.com/p/datandroid>
*
* This file is part of datatandroid.
*
* datatandroid 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 3 of the License, or
* (at your option) any later version.
*
* datatandroid 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 datatandroid. If not, see <http://www.gnu.org/licenses/>.
*/
package com.projectsexception.datandroid;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.xmlpull.v1.XmlPullParserException;
import android.content.res.XmlResourceParser;
import com.projectsexception.datandroid.database.BasicProperty;
import com.projectsexception.datandroid.database.CollectionBasicProperty;
import com.projectsexception.datandroid.database.CollectionEntityProperty;
import com.projectsexception.datandroid.database.Database;
import com.projectsexception.datandroid.database.Entity;
import com.projectsexception.datandroid.database.EntityProperty;
import com.projectsexception.datandroid.database.IBasicProperty;
import com.projectsexception.datandroid.database.ICollectionProperty;
import com.projectsexception.datandroid.database.IProperty;
import com.projectsexception.datandroid.util.DatabaseUtil;
import com.projectsexception.datandroid.util.DatandroidConfigurationException;
import com.projectsexception.datandroid.util.ReflectionUtil;
public class DatandroidSetup {
private Set<String> unexpectedClasses;
private Set<String> analizedClasses;
private Entity entity;
private Map<String, Class<?>> entityAttributes;
public DatandroidSetup() {
unexpectedClasses = new HashSet<String>();
analizedClasses = new HashSet<String>();
entity = null;
entityAttributes = null;
}
public Database parseConfigFile(XmlResourceParser res) throws DatandroidException {
Database database = new Database();
Map<String, Entity> entities = new HashMap<String, Entity>();
database.setEntities(entities);
try {
while (res.getEventType() != XmlResourceParser.END_DOCUMENT) {
if (res.getEventType() == XmlResourceParser.START_TAG) {
if (res.getName().equals("database")) {
database.setName(res.getAttributeValue(null, "name"));
database.setVersion(Integer.parseInt(res.getAttributeValue(null, "version")));
} else if (res.getName().equals("entity")) {
Class<?> clazz = checkClassName(res.getAttributeValue(null, "class"));
entity = createEntity(clazz, res.getAttributeValue(null, "tableName"));
entityAttributes = ReflectionUtil.classAttributes(clazz);
} else if (res.getName().equals("id")) {
entity.setIdProperty(createIdProperty(res.getAttributeValue(null, "name"),
res.getAttributeValue(null, "class"), res.getAttributeValue(null, "column")));
} else if (res.getName().equals("property")) {
entity.getProperties().add(createProperty(res.getAttributeValue(null, "name"), res.getAttributeValue(null, "class"),
res.getAttributeValue(null, "column"), res.getAttributeValue(null, "allowNull"), res.getAttributeValue(null, "deleteCascade")));
} else if (res.getName().equals("one-to-many")) {
entity.getProperties().add(createColProperty(res.getAttributeValue(null, "name"), res.getAttributeValue(null, "classItem"),
res.getAttributeValue(null, "table"), res.getAttributeValue(null, "column"), res.getAttributeValue(null, "allowNull")));
}
} else if (res.getEventType() == XmlResourceParser.TEXT) {
// text
} else if (res.getEventType() == XmlResourceParser.END_TAG) {
if (res.getName().equals("entity")) {
if (entity.getIdProperty() == null) {
throw new DatandroidConfigurationException("Mandatory <id> element not found in entity class " + entity.getClassName());
}
fillProperties();
entities.put(entity.getClassName(), entity);
}
}
res.next();
}
} catch (XmlPullParserException e) {
throw new DatandroidConfigurationException(e);
} catch (IOException e) {
throw new DatandroidConfigurationException(e);
} finally {
res.close();
}
if (!unexpectedClasses.isEmpty()) {
throw new DatandroidConfigurationException("Founded entities not configured: " + unexpectedClasses);
}
return database;
}
private Entity createEntity(Class<?> clazz, String tableName) throws DatandroidException {
if (DatabaseUtil.isBasicType(clazz)) {
throw new DatandroidConfigurationException("Class entity " + clazz.getName() + " is a basic type");
}
analizedClasses.add(clazz.getName());
if (unexpectedClasses.contains(clazz.getName())) {
unexpectedClasses.remove(clazz.getName());
}
Entity entity = new Entity();
entity.setClassName(clazz.getName());
if (isEmpty(tableName)) {
entity.setTableName(clazz.getSimpleName());
} else {
entity.setTableName(tableName);
}
entity.setProperties(new ArrayList<IProperty>());
return entity;
}
private IBasicProperty createIdProperty(String name, String className, String columnName) throws DatandroidException {
Class<?> clazz = entityAttributes.get(name);
if (clazz == null) {
throw new DatandroidConfigurationException("Property " + name + " not found in entity " + entity.getClassName());
}
if (!isEmpty(className) && !className.equals(clazz.getName())) {
throw new DatandroidConfigurationException("Property " + name + " with class" + className + " not aplicable to " + clazz.getName());
}
if (!DatabaseUtil.isBasicType(clazz)) {
throw new DatandroidConfigurationException("ID with class " + className + " is a basic type");
}
IBasicProperty prop = new BasicProperty();
prop.setName(name);
prop.setClassName(clazz.getName());
if (isEmpty(columnName)) {
prop.setColumnName(name);
} else {
prop.setColumnName(columnName);
}
prop.setAllowNull(false);
return prop;
}
private IProperty createProperty(String name, String className, String columnName, String allowNull, String deleteCascade) throws DatandroidException {
Class<?> clazz = entityAttributes.get(name);
if (clazz == null) {
throw new DatandroidConfigurationException("Property " + name + " not found in entity " + entity.getClassName());
}
if (!isEmpty(className) && !className.equals(clazz.getName())) {
throw new DatandroidConfigurationException("Property " + name + " with class " + className + " not aplicable to " + clazz.getName());
}
IBasicProperty prop;
if (DatabaseUtil.isBasicType(clazz)) {
prop = new BasicProperty();
} else {
prop = new EntityProperty();
boolean cascade = Boolean.parseBoolean(deleteCascade);
if (deleteCascade == null) {
cascade = true;
}
((EntityProperty) prop).setDeleteCascade(cascade);
}
prop.setName(name);
prop.setClassName(clazz.getName());
if (isEmpty(columnName)) {
prop.setColumnName(name);
} else {
prop.setColumnName(columnName);
}
prop.setAllowNull(Boolean.parseBoolean(allowNull));
return prop;
}
private ICollectionProperty createColProperty(String name, String classItem, String tableName, String columnName, String allowNull) throws DatandroidException {
Class<?> clazz = entityAttributes.get(name);
if (clazz == null) {
throw new DatandroidConfigurationException("Property " + name + " not found in entity " + entity.getClassName());
}
if (!java.util.Collection.class.isAssignableFrom(clazz)) {
throw new DatandroidConfigurationException("Property " + name + " is not a collection");
}
if (isEmpty(classItem)) {
throw new DatandroidConfigurationException("Attibute 'classItem' required for property " + name
+ " in entity " + entity.getClassName());
}
Class<?> classItemObj = checkClassName(classItem);
ICollectionProperty prop;
if (DatabaseUtil.isBasicType(classItemObj)) {
prop = new CollectionBasicProperty();
if (isEmpty(tableName)) {
((CollectionBasicProperty) prop).setTableName(entity.getTableName() + "_" + prop.getName());
} else {
((CollectionBasicProperty) prop).setTableName(tableName);
}
} else {
prop = new CollectionEntityProperty();
if (isEmpty(columnName)) {
((CollectionEntityProperty) prop).setColumnName(entity.getTableName() + "_ID");
} else {
((CollectionEntityProperty) prop).setColumnName(columnName);
}
}
prop.setName(name);
prop.setClassItem(classItem);
prop.setClassName(clazz.getName());
prop.setAllowNull(Boolean.parseBoolean(allowNull));
return prop;
}
private void fillProperties() throws DatandroidException {
// Completamos las propiedades y relaciones que no estn especificadas
for (String attribute : entityAttributes.keySet()) {
boolean found = entity.getIdProperty().getName().equals(attribute);
if (!found && entity.getProperties() != null) {
for (IProperty prop : entity.getProperties()) {
if (attribute.equals(prop.getName())) {
found = true;
break;
}
}
}
if (!found) {
Class<?> propClass = entityAttributes.get(attribute);
if (propClass.isAssignableFrom(java.util.Collection.class)) {
throw new DatandroidConfigurationException("Found a property that is a collection and is not mapped");
}
IBasicProperty prop;
if (DatabaseUtil.isBasicType(propClass)) {
prop = new BasicProperty();
} else {
if (!analizedClasses.contains(propClass.getName())) {
unexpectedClasses.add(propClass.getName());
}
prop = new EntityProperty();
}
prop.setName(attribute);
prop.setColumnName(attribute);
prop.setClassName(propClass.getName());
prop.setAllowNull(false);
entity.getProperties().add(prop);
}
}
}
private Class<?> checkClassName(String className) throws DatandroidException {
if (isEmpty(className)) {
throw new DatandroidConfigurationException("Property attribute class can't be empty");
}
try {
Class<?> clazz = Class.forName(className);
if (!DatabaseUtil.isBasicType(className) && !java.util.Collection.class.isAssignableFrom(clazz)) {
if (!analizedClasses.contains(className)) {
unexpectedClasses.add(className);
}
}
return clazz;
} catch (ClassNotFoundException e) {
throw new DatandroidConfigurationException(e.getLocalizedMessage());
}
}
private static boolean isEmpty(String string) {
return string == null || string.trim().length() == 0;
}
}
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