Design Patterns - 03 Composite and Flyweight Pattern
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The document discusses the composite and flyweight patterns. The composite pattern allows groups of objects to be treated the same as individual objects. It makes it easy to add new components and keeps client code simple. The flyweight pattern saves memory by sharing objects when there are many instances that differ only in state. It divides object characteristics into intrinsic and extrinsic properties, with extrinsic properties stored externally to allow sharing. Both patterns are useful when there are large numbers of objects that need to be represented efficiently.
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The composite design pattern allows clients to treat both individual objects and compositions of objects uniformly. It composes objects into tree structures to represent part-whole hierarchies. The pattern allows clients to ignore the difference between compositions of objects and individual objects. This makes it possible to treat both kinds of objects uniformly.
Design pattern composite 20120413 joncash 01
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Assignment # 2Preliminaries
Important Points
· Evidence of academic misconduct (e.g., plagiarism, collaboration/collusion among students) will be taken seriously and University regulations strictly followed.
· You are expected to produce a word-processed answer to this assignment. Please use Arial font and a font size of 12. For SQL code and output, you can use courier new, which preserves SQL format and layout.
· You are required to use the Harvard Style of referencing and citation. The “Cite them right” guide is recommended for referencing and citation (Pears and Shields, 2008) which should be followed throughout your answer especially Part 3.
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Module Learning Outcomes (MLOs) assessed:
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Intellectual / Professional skills & abilities:
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4. Design and Implementation of a data warehouse using Oracle database system.
Tasks of the Assignment
Part 1 (50 marks) Scenario: Mechanical Production Factories (MPF) Database System
MPF is a company that produces customised mechanical products within Europe. The company produces a rang of mechanical products at several factories. Information about which work force are assigned to which production orders and kept in the force usage register.
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Figure 1: UML Class Diagram for the MPF Database
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Product (ProdId: ID, Description: LTXT, CostPerItem: DEC, LabCostPerItem: DEC)
FactoryProduct (FactoryId: ID *: ID, ProdId*: ID)
Workforce (wfId: ID, wfName: STXT, yearlyIncome: DEC, yearlyTax: DEC, taxCode: INT, factoryId*: ID)
Production (prodOrderId: ID, quantity: INT, itemPrice: DEC,orderDate: Date, promiseDate: Date, completionDate: Date, shipmentDate: Date, status: CHAR, prodID*: ID)
ForceUsage (wfId*:ID, prodOrderId*:I.
UML
Fundamentals of UML, diagrams and usage based on UML 2.0 delivered to post-graduate students of Object Oriented Software Engineering.
Part2- The Atomic Information Resource
The document discusses a new data modeling architecture called the Atomic Information Resource (AIR) data model, which is the basis of the AtomicDB database management system. The AIR model replaces database tables and records with atomic information resources that are not bound by data structures and know their own context and relationships. It also describes how the model was conceptualized based on earlier patented works and demonstrates how concepts, models, and data can be modeled and stored in AtomicDB without the limitations of traditional table-based approaches. The key advantage is that data sets are not duplicated and the same data can be referenced by multiple concepts.
QEBU: AN ADVANCED GRAPHICAL EDITOR FOR THE EBUCORE METADATA SET | Paolo PASIN...
Creation and management of metadata documents can be quite a difficult task to accomplish manually. To address this issue in the context of the EBUCore v1.3 metadata set, we propose a GUI-based metadata editor, QEbu, developed during the Multimedia Archival Techniques course, held at the Polytechnic University of Turin in collaboration with RAI.
The aim is to provide a user-friendly graphical editor to create and manage XML documents, relieving the user from the burden of worrying about the structure of the data and letting him focus on the actual content.
QEbu has been developed in C++ using the cross-platform and open source library Qt 4.8; this framework was chosen in order to exploit its natural features for developing interface-centered applications.
software engineering Design Patterns.pdf
The document discusses various design patterns categorized as creational, structural, and behavioral. Creational patterns deal with object creation mechanisms and include singleton, factory method, abstract factory, builder, and prototype patterns. Structural patterns focus on class and object composition and include adapter, bridge, composite, decorator, facade, flyweight, and proxy patterns. Behavioral patterns deal with communication between objects and include observer, strategy, chain of responsibility, command, interpreter, iterator, mediator, memento, state, template method, and visitor patterns. Each pattern is explained with an example.
Terraform modules restructured
Restructured terraform modules, build reusable testable composable terraform modules
this has also an introduction to terraform
Terraform Modules Restructured
Terraform modules provide reusable, composable infrastructure components. The document discusses restructuring infrastructure code into modules to make it more reusable, testable, and maintainable. Key points include:
- Modules should be structured in a three-tier hierarchy from primitive resources to generic services to specific environments.
- Testing modules individually increases confidence in changes.
- Storing module code and versions in Git provides versioning and collaboration.
- Remote state allows infrastructure to be shared between modules and deployments.
Ch08
The document discusses various techniques for modeling software requirements including:
1) Entity-relationship diagrams (ERDs) which model data objects and their relationships to understand the data domain.
2) Use case modeling which describes scenarios of how external actors will use the system through use cases and diagrams.
3) Flow-oriented modeling using data flow diagrams (DFDs) which represent how data objects are transformed as they move through the system.
Ch08
The document discusses various techniques for modeling software requirements including:
1) Entity-relationship diagrams (ERDs) which model data objects and their relationships to understand the data domain.
2) Use case modeling which describes scenarios of how external actors will use the system through use cases and diagrams.
3) Object-oriented modeling which defines classes, objects, attributes, methods, encapsulation, and inheritance.
4) Flow modeling using data flow diagrams (DFDs) which represent how data objects flow through the system as they are transformed.
D0373024030
This document describes a technique for mining intentional knowledge from XML documents to improve query answering performance. The technique involves:
1. Parsing an XML document and generating a tree model. Frequent subtrees are then mined from the tree to extract Tree-based Association Rules (TARs).
2. Storing the mined TARs in an XML format. An index is also created to enable faster access to the knowledge during querying.
3. Transforming XML queries to operate on the mined TARs instead of the original XML document. This allows queries to be answered more quickly.
4. The method is evaluated on sample XML data and queries. Results show the approach answers queries significantly faster
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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Visual Style and Aesthetics: Basics of Visual Design
Visual Design for Enterprise Applications
Range of Visual Styles.
Mobile Interfaces:
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Approach to Mobile Design
Patterns
Storytelling For The Web: Integrate Storytelling in your Design Process
In this slides I explain how I have used storytelling techniques to elevate websites and brands and create memorable user experiences. You can discover practical tips as I showcase the elements of good storytelling and its applied to some examples of diverse brands/projects..
UNIT V ACTIONS AND COMMANDS, FORMS AND CONTROLS.pptx
Actions and Commands:
Tap, Swipe, and Pinch
Rotate and Shake -Buttons -Menu Bars – Menus
Toolbars - Links- Action Panels
Hover Tools - Keyboard Actions- Drag-and-Drop
Typed Commands-Affordance-Direct Manipulation.
Forms and Controls:
Basics of Form Design
Patterns.
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【主营项目】
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国外毕业证学位证成绩单办理流程：
1客户提供波士顿大学波士顿大学本科毕业证成绩单办理信息：姓名生日专业学位毕业时间等（如信息不确定可以咨询顾问：我们有专业老师帮你查询）；
2开始安排制作毕业证成绩单电子图；
3毕业证成绩单电子版做好以后发送给您确认；
4毕业证成绩单电子版您确认信息无误之后安排制作成品；
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专业服务请勿犹豫联系我！本公司是留学创业和海归创业者们的桥梁。一次办理终生受用一步到位高效服务。详情请在线咨询办理,欢迎有诚意办理的客户咨询!洽谈。
招聘代理：本公司诚聘英国加拿大澳洲新西兰美国法国德国新加坡各地代理人员如果你有业余时间有兴趣就请联系我们咨询顾问：+微信:95270640知道母亲身体不好家里盖新房也欠了不少钱总想趁假期赚点钱在校寄宿时用不着老向爷爷奶奶要盛夏的乡村仍旧清凉清清爽爽的山娃也过得自由自在不知为啥山娃总情不自禁地思念起城里的父亲每年暑假瞅见远乡近邻的小伙伴都争先恐后地往城里跑山娃就更思念父亲了老想着进父亲的城看看每次从城里洋里洋气地回来小伙伴们总争论着各自到过的城比试比试谁父亲的城最大最美他们大谈城里的新鲜事大谈父亲携他们逛城的快乐事在孩子们幼小的心中地
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1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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Design Patterns - 03 Composite and Flyweight Pattern
- 1. 03 Composite and Flyweight Pattern Design Patterns © Prafulla Paraskar 2010
- 2. Composite Structural Design Pattern © Prafulla Paraskar 2010
- 3. Definition The composite pattern describes that a group of objects are to be treated in the same way as a single instance of an object.(wikipedia) © Prafulla Paraskar 2010
- 4. Composite Pattern – Explained (1/2) © Prafulla Paraskar 2010
- 5. Composite Pattern – Explained (2/2) Arranges structured hierarchies so that single components and groups of components can be treated in the same way. Makes easier to add new components. Makes client code simpler, since they do not have to know if they are dealing with one or more components. Typical operations on the components include add, remove, display, find and group. © Prafulla Paraskar 2010
- 6. Composite Pattern – UML Diagram © Prafulla Paraskar 2010
- 7. Composite Pattern – Real World Samples Files and folders in Windows Organization Tree Arithmetic Expressions like (2 + 4) * ( 5 + 6) Generic containers in .NET framework like list, queue, stack help implement the composite pattern. © Prafulla Paraskar 2010
- 9. To treat all objects in a composite uniformly.© Prafulla Paraskar 2010
- 10. Flyweight Structural Design Pattern © Prafulla Paraskar 2010
- 11. Definition The Flyweight pattern is a pattern for sharing objects, where each instance does not contain its own state but stores it externally. This allows efficient sharing of objects to save space when there are many instances but only a few different types. (James W. Cooper – C# Design Patterns) © Prafulla Paraskar 2010
- 12. Flyweight Pattern – Explained (1/3) Designing objects down to the lowest levels of system "granularity” provides optimal flexibility , but can be unacceptably expensive in terms Row objects a p p a r e n t Row objects Character object Column object © Prafulla Paraskar 2010
- 13. Flyweight Pattern – Explained (2/3) column row row row a f e d c b g l k j i h Flyweight pool © Prafulla Paraskar 2010
- 14. Flyweight Pattern – Explained (3/3) Useful in cases where large number of objects (flyweights)required to provide “fine grain access” to the system. Characteristics of flyweights are divided into intrinsic (inseparable) e.g. identity and extrinsic (separable) e.g. shared resource. Shared resource is taken care by a directory which manages enrollment of participant and provides on demand access to shared resources. Flyweights can only be created with help of a factory to enforce enrollment and sharing of resources. © Prafulla Paraskar 2010
- 15. Flyweight Pattern – UML Diagram © Prafulla Paraskar 2010
- 16. Flyweight Pattern – Real World Samples Thumbnail representation of images in windows explorer. Order processing system where the items are relatively similar and differ only in certain characteristics. Representation of files and folders in windows explorer. Individual cells in a spreadsheet program. © Prafulla Paraskar 2010
- 18. Different kinds of state, which can be handled differently to achieve space savings
- 19. Group of objects that share state
- 20. Ways of computing some of the state at runtime
- 22. Thank you! http://geekswithblogs.net/technomad Presentation by Prafulla Paraskar prafulla.paraskar@s1.com © 2010 S1 India Pvt. Ltd. Presentation by Prafulla Paraskar eprafulla@gmail.com © 2010 Prafulla Paraskar