org.hobsoft.contacts.server.repository.FakeContactRepository.java Source code

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Here is the source code for org.hobsoft.contacts.server.repository.FakeContactRepository.java

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/*
 * 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 org.hobsoft.contacts.server.repository;

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.hobsoft.contacts.server.model.Contact;
import org.springframework.stereotype.Repository;

import com.google.common.collect.ImmutableList;

import static com.google.common.base.Preconditions.checkArgument;

/**
 * In-memory contact repository implementation.
 */
@Repository
public class FakeContactRepository implements ContactRepository {
    // ----------------------------------------------------------------------------------------------------------------
    // fields
    // ----------------------------------------------------------------------------------------------------------------

    private final Map<Long, Contact> contactsById;

    private long nextId;

    // ----------------------------------------------------------------------------------------------------------------
    // constructors
    // ----------------------------------------------------------------------------------------------------------------

    public FakeContactRepository() {
        contactsById = new LinkedHashMap<>();
        nextId = 1;
    }

    // ----------------------------------------------------------------------------------------------------------------
    // ContactRepository methods
    // ----------------------------------------------------------------------------------------------------------------

    /**
     * {@inheritDoc}
     */
    @Override
    public void create(Contact contact) {
        Long id = contact.getId();

        if (id == null) {
            id = nextId++;
            contact.setId(id);
        }

        contactsById.put(id, contact);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public List<Contact> getAll() {
        return ImmutableList.copyOf(contactsById.values());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Contact get(long id) {
        Contact contact = contactsById.get(id);

        if (contact == null) {
            throw new IllegalArgumentException("Contact not found: " + id);
        }

        return contact;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void delete(Contact contact) {
        Long id = contact.getId();
        checkArgument(id != null, "Cannot delete transient entity: " + contact);

        contactsById.remove(id);
    }
}