object oriented analysis and design flexible software

QUALITY. PRODUCTIVITY. INNOVATION.

endava.com

Object Oriented Analysis and DesignGive your software a 30-

minute workout

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Give your software a 30-minute workout

Flexible software

Benefits of analysis Design decisions Flexible applications Cohesion OOA&D Toolbox

QUALITY. PRODUCTIVITY. INNOVATION.

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We should use only one search method, using InstrumentSpec

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public class Inventory { private final List<Instrument> inventory; public Inventory() { inventory = new LinkedList<>(); } public void addInstrument(String serialNumber, double price, InstrumentSpec spec) { Instrument instrument = null; if (spec instanceof GuitarSpec) { instrument = new Guitar(serialNumber, price, (GuitarSpec) spec); } else if (spec instanceof MandolinSpec) { instrument = new Mandolin(serialNumber, price, (MandolinSpec) spec); } inventory.add(instrument); } public Instrument get(String serialNumber) { for (Instrument instrument : inventory) { if (instrument.getSerialNumber().equals(serialNumber)) { return instrument; } } return null; } public List<Instrument> search(InstrumentSpec searchSpec) { List<Instrument> matchingInstruments = new LinkedList<>(); for (Instrument instrument : inventory) { if (instrument.getSpec().matches(searchSpec)) { matchingInstruments.add(instrument); } } return matchingInstruments; }}

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The great ease-of-change challenge

QUALITY. PRODUCTIVITY. INNOVATION.

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QUALITY. PRODUCTIVITY. INNOVATION.

Secrieru RaduJunior Developer