InMemoryContactDao.java

/*
 * Copyright 2011 Colin Hebert
 *
 * 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.company.contactbook.dao.impl;

import com.company.contactbook.bean.Contact;
import com.company.contactbook.dao.ContactDao;

import java.util.Collection;
import java.util.HashSet;

/**
 * In-memory implementation of contact book.
 *
 * @author Colin Hebert
 */
public class InMemoryContactDao implements ContactDao {
    private Collection<Contact> contacts = new HashSet<Contact>();
    private int idCount;

    public void createContact(Contact contact) {
        contact.setId(idCount++);
        contacts.add(contact);
    }

    public Contact findContact(int id) {
        for (Contact contact : contacts) {
            if (contact.getId() == id)
                return contact;
        }
        return null;
    }

    public Collection<Contact> searchContactsByFirstname(String firstname) {
        Collection<Contact> foundContacts = new HashSet<Contact>();
        for (Contact contact : contacts) {
            if (contact.getFirstname().equalsIgnoreCase(firstname))
                foundContacts.add(contact);
        }

        return foundContacts;
    }
}