PricingDataFileLoader.java example

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nebula.widgets.nattable-master
/*******************************************************************************
 * Copyright (c) 2012 Original authors and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Original authors and others - initial API and implementation
 ******************************************************************************/
package org.eclipse.nebula.widgets.nattable.dataset.pricing;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

public class PricingDataFileLoader<T> {

    public List<T> loadDataFromFile() throws IOException {
        List<T> data = new ArrayList<T>();
        DelimitedFileReader reader = null;
        try {
            reader = new DelimitedFileReader(
                    new BufferedReader(new InputStreamReader(
                            PricingDataFileLoader.class
                                    .getResourceAsStream("pricing_data.txt"))),
                    '\t');
            if (reader.ready() && reader.markSupported()) {
                while (reader.read() > 0) {
                    parseTabDelimitedLine(reader.getTabbedLineRead(), data);
                }
            }
        } finally {
            if (reader != null) {
                reader.close();
            }
        }
        return data;
    }

    @SuppressWarnings("unchecked")
    public void parseTabDelimitedLine(StringTokenizer tabs, List<T> data) {
        while (tabs.hasMoreElements()) {
            PricingDataBean bean = new PricingDataBean();
            bean.setIsin(extractStringFromToken(tabs.nextToken()));

            bean.setBid(extractDoubleFromToken(tabs.nextToken()));
            bean.setAsk(extractDoubleFromToken(tabs.nextToken()));
            bean.setBidYield(extractDoubleFromToken(tabs.nextToken()));
            bean.setAskYield(extractDoubleFromToken(tabs.nextToken()));
            bean.setBidSpread(extractDoubleFromToken(tabs.nextToken()));
            bean.setAskSpread(extractDoubleFromToken(tabs.nextToken()));
            bean.setBidOverAsk(extractDoubleFromToken(tabs.nextToken()));
            bean.setBidOverAskP(extractDoubleFromToken(tabs.nextToken()));
            bean.setBidAskType(extractStringFromToken(tabs.nextToken()));

            bean.setPricingModel(extractStringFromToken(tabs.nextToken()));
            bean.setBaseIssue(extractStringFromToken(tabs.nextToken()));

            /*
             * bean.setClosingPrice(extractDoubleFromToken(tabs.nextToken()));
             * bean.setClosingYield(extractDoubleFromToken(tabs.nextToken()));
             * bean.setClosingSpread(extractDoubleFromToken(tabs.nextToken()));
             * bean.setPriceChange(extractDoubleFromToken(tabs.nextToken()));
             * bean.setYieldChange(extractDoubleFromToken(tabs.nextToken()));
             * bean.setSpreadChange(extractDoubleFromToken(tabs.nextToken()));
             *
             * bean.setBasisPointValue(extractDoubleFromToken(tabs.nextToken()))
             * ; bean.setModDuration(extractDoubleFromToken(tabs.nextToken()));
             * bean.setConvexity(extractDoubleFromToken(tabs.nextToken()));
             * bean.setComments(extractStringFromToken(tabs.nextToken()));
             * bean.setNativeTradingGroup
             * (extractStringFromToken(tabs.nextToken()));
             *
             * bean.setTgPosition(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTgPL(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTgClosingPL(extractDoubleFromToken(tabs.nextToken()));
             * bean
             * .setTgCostOfInventory(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTgAverageCost(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTgUnrealizedPL(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTgNetPL(extractDoubleFromToken(tabs.nextToken()));
             */

            // new file does not contain these columns
            /*
             * bean.setIdnAskYield(extractDoubleFromToken(tabs.nextToken()));
             * bean.setIdnBid(extractDoubleFromToken(tabs.nextToken()));
             * bean.setIdnBidSize(extractDoubleFromToken(tabs.nextToken()));
             * bean.setIdnBidSpread(extractDoubleFromToken(tabs.nextToken()));
             * bean.setIdnBidYield(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTdPosition(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTdTradingPL(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTdClosingPL(extractDoubleFromToken(tabs.nextToken()));
             * bean
             * .setTdCostOfInventory(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTdAvgCost(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTdUnrealizedPL(extractDoubleFromToken(tabs.nextToken()));
             * bean.setTdNetPL(extractDoubleFromToken(tabs.nextToken()));
             */

            bean.setAlias(extractStringFromToken(tabs.nextToken()));
            bean.setErrorMessage(extractStringFromToken(tabs.nextToken()));
            bean.setErrorSeverity(extractIntFromToken(tabs.nextToken()));
            bean.setPricingSource(extractStringFromToken(tabs.nextToken()));
            bean.setSecurityType(extractStringFromToken(tabs.nextToken()));
            bean.setComments(extractStringFromToken(tabs.nextToken()));
            data.add((T) bean);
        }
    }

    private int extractIntFromToken(String token) {
        System.out.println("int: " + token);
        return token.trim().equals("") || token.trim().equals("\t") ? 0
                : Integer.parseInt(token);
    }

    private double extractDoubleFromToken(String token) {
        System.out.println("double: " + token);
        return token.trim().equals("") || token.trim().equals("\t") ? 0
                : Double.parseDouble(token);
    }

    private String extractStringFromToken(String token) {
        System.out.println("string: " + token);
        return token == null
                || (token.trim().equals("") || token.trim().equals("\t")) ? null
                        : token;
    }
}