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/*
* 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.apache.tuscany.samples.das.companyweb;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Random;
import org.apache.tuscany.das.rdb.Command;
import org.apache.tuscany.das.rdb.DAS;
import commonj.sdo.DataObject;
public class CompanyClient {
private Random generator = new Random();
private DAS das = DAS.FACTORY.createDAS(getConfig("CompanyConfig.xml"));
public final List getCompanies() {
Command read = das.getCommand("all companies");
DataObject root = read.executeQuery();
return root.getList("COMPANY");
}
public final List getCompaniesWithDepartments() {
Command read = das.getCommand("all companies and departments");
DataObject root = read.executeQuery();
return root.getList("COMPANY");
}
public final List getDepartmentsForCompany(int id) {
Command read = das.getCommand("all departments for company");
read.setParameter(1, new Integer(id));
DataObject root = read.executeQuery();
return root.getList("COMPANY");
}
public final void addDepartmentToFirstCompany() {
Command read = das.getCommand("all companies and departments");
DataObject root = read.executeQuery();
DataObject firstCustomer = root.getDataObject("COMPANY[1]");
DataObject newDepartment = root.createDataObject("DEPARTMENT");
newDepartment.setString("NAME", "Default Name");
firstCustomer.getList("departments").add(newDepartment);
das.applyChanges(root);
}
public final void deleteDepartmentsFromFirstCompany() {
// This section gets the ID of the first Company just so I can
// demonstrate a parameterized command next
Command readAll = das.getCommand("all companies and departments");
DataObject root = readAll.executeQuery();
int idOfFirstCustomer = root.getInt("COMPANY[1]/ID");
System.out.println("ID of first company is: " + idOfFirstCustomer);
// Read a specific company based on the known ID
Command readCust = das.getCommand("company by id with departments");
readCust.setParameter(1, new Integer(idOfFirstCustomer));
root = readCust.executeQuery();
// Delete all the comany's departments from the graph
DataObject firstCustomer = root.getDataObject("COMPANY[1]");
// Shallow copy of list for deleting. This is required to avoid the
// dreaded
// ConcurrentModificationException since #delete operation also removes
// from the original list
List allDepartments = new ArrayList(firstCustomer.getList("departments"));
Iterator i = allDepartments.iterator();
DataObject department;
while (i.hasNext()) {
department = (DataObject) i.next();
System.out.println("Deleting department named: " + department.getString("NAME"));
department.delete();
}
das.applyChanges(root);
}
public final void changeFirstCompanysDepartmentNames() {
// This section gets the ID of the first Company just so I can
// demonstrate a parameterized command next
Command readAll = das.getCommand("all companies and departments");
DataObject root = readAll.executeQuery();
int idOfFirstCustomer = root.getInt("COMPANY[1]/ID");
System.out.println("ID of first company is: " + idOfFirstCustomer);
// Read a specific company based on the known ID
Command readCust = das.getCommand("company by id with departments");
readCust.setParameter(1, new Integer(idOfFirstCustomer));
root = readCust.executeQuery();
// Modify all the comany's department names
DataObject firstCustomer = root.getDataObject("COMPANY[1]");
Iterator i = firstCustomer.getList("departments").iterator();
DataObject department;
while (i.hasNext()) {
department = (DataObject) i.next();
System.out.println("Modifying department: " + department.getString("NAME"));
department.setString("NAME", getRandomDepartmentName());
}
das.applyChanges(root);
}
public void releaseResources() {
das.releaseResources();
}
// Utilities
private String getRandomDepartmentName() {
int number = generator.nextInt(1000) + 1;
return "Dept-" + number;
}
private InputStream getConfig(String fileName) {
return getClass().getClassLoader().getResourceAsStream(fileName);
}
}
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