Portfolio.java

/*
 * Copyright 2002-2013 the original author or authors.
 *
 * 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 ch.rasc.s4ws.portfolio;

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

public class Portfolio {

	private final Map<String, PortfolioPosition> positionLookup = new LinkedHashMap<>();

	public List<PortfolioPosition> getPositions() {
		return new ArrayList<>(this.positionLookup.values());
	}

	public void addPosition(PortfolioPosition position) {
		this.positionLookup.put(position.getTicker(), position);
	}

	public PortfolioPosition getPortfolioPosition(String ticker) {
		return this.positionLookup.get(ticker);
	}

	/**
	 * @return the updated position or null
	 */
	public PortfolioPosition buy(String ticker, int sharesToBuy) {
		PortfolioPosition position = this.positionLookup.get(ticker);
		if (position == null || sharesToBuy < 1) {
			return null;
		}
		position = new PortfolioPosition(position, sharesToBuy);
		this.positionLookup.put(ticker, position);
		return position;
	}

	/**
	 * @return the updated position or null
	 */
	public PortfolioPosition sell(String ticker, int sharesToSell) {
		PortfolioPosition position = this.positionLookup.get(ticker);
		if (position == null || sharesToSell < 1 || position.getShares() < sharesToSell) {
			return null;
		}
		position = new PortfolioPosition(position, -sharesToSell);
		this.positionLookup.put(ticker, position);
		return position;
	}

}