/*
* JBoss, Home of Professional Open Source
* Copyright 2012, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.acme.spring.testng.repository.impl;
import com.acme.spring.testng.domain.Stock;
import com.acme.spring.testng.repository.StockRepository;
import org.springframework.stereotype.Repository;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* <p>A default implementation of {@link com.acme.spring.testng.repository.StockRepository}.</p>
*
* <p>This is a pretty simple implementation that stores all the stocks in a memory.</p>
*
* @author <a href="mailto:jmnarloch@gmail.com">Jakub Narloch</a>
*/
@Repository
public class DefaultStockRepository implements StockRepository {
/**
* <p>Represents map of stocks.</p>
*/
private final Map<String, Stock> stockMap = new HashMap<String, Stock>();
/**
* <p>Creates new instance of {@link DefaultStockRepository}</p>
*/
public DefaultStockRepository() {
// empty constructor
}
/**
* {@inheritDoc}
*/
@Override
public long save(Stock stock) {
validateNoNull(stock, "stock");
validateNotEmpty(stock.getSymbol(), "symbol");
// generates 'unique' identifier
stock.setId((long) (Math.random() * 10E4D));
// saves the stock in map
stockMap.put(stock.getSymbol(), stock);
// returns the assigned id
return stock.getId();
}
/**
* {@inheritDoc}
*/
@Override
public void update(Stock stock) {
validateNoNull(stock, "stock");
validateNotEmpty(stock.getSymbol(), "symbol");
for (Map.Entry<String, Stock> entry : stockMap.entrySet()) {
if (entry.getValue() == stock) {
stockMap.remove(entry.getKey());
}
}
stockMap.put(stock.getSymbol(), stock);
}
/**
* {@inheritDoc}
*/
@Override
public Stock get(long id) {
for (Stock stock : stockMap.values()) {
if (stock.getId() == id) {
return stock;
}
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
public Stock getBySymbol(String symbol) {
validateNotEmpty(symbol, "symbol");
return stockMap.get(symbol);
}
/**
* {@inheritDoc}
*/
@Override
public List<Stock> getAll() {
return new ArrayList<Stock>(stockMap.values());
}
/**
* <p>Validates that the passed parameter is not null or empty string, in case it isn't than {@link
* IllegalArgumentException} is being thrown.</p>
*
* @param param the parameter to validate
* @param parameterName the parameter name
*/
private void validateNotEmpty(String param, String parameterName) {
validateNoNull(param, parameterName);
if (param.trim().length() == 0) {
throw new IllegalArgumentException(MessageFormat.format("The {0} can not be null or empty string.",
parameterName));
}
}
/**
* <p>Validates that the passed parameter is not null, in case it's null than the {@link IllegalArgumentException}
* is being thrown.</p>
*
* @param param the parameter to validate
* @param parameterName the parameter name
*/
private void validateNoNull(Object param, String parameterName) {
if (param == null) {
throw new IllegalArgumentException(MessageFormat.format("The '{0}' can not be null.", parameterName));
}
}
}