Page 1 of 13 §1 OO Design Principles§0
§0
§1 =================§0
§0
§1 §0By§0
§0
§0 §0Robert C Martin§0
Page 2 of 13 §1§lSRP§0
§0
§0§oThe Single§0
§0§oResponsibility §0§oPrinciple§0
§0
§0A class should have§0
§0one, and only one,§0
§0reason to change.§0
Page 3 of 13 §1§lOCP§0
§0
§0§oThe Open Closed§0
§0§oPrinciple§0
§0
§0You should be able to§0
§0extend a classes§0
§0behavior, without§0
§0modifying it.§0
Page 4 of 13 §1§lLSP§0
§0
§0§oThe Liskov §0§oSubstitution§0
§0§oPrinciple§0
§0
§0Derived§0
§0classes must be§0
§0substitutable for their§0
§0base classes.§0
Page 5 of 13 §1§lISP§0
§0
§0§oThe Interface§0
§0§oSegregation Principle§0
§0
§0
§0Make fine§0
§0grained interfaces§0
§0that are client specific.§0
Page 6 of 13 §1§lDIP§0
§0
§0§oThe Dependency§0
§0§oInversion Principle§0
§0
§0Depend on§0
§0abstractions, not on§0
§0concretions.§0
Page 7 of 13 §1§lREP§0
§0
§0§oThe Release Reuse§0
§0§oEquivalency Principle§0
§0
§0The granule of reuse§0
§0is the granule of§0
§0release.§0
Page 8 of 13 §1§lCCP§0
§0
§0§oThe Common Closure§0
§0§oPrinciple§0
§0
§0Classes that change§0
§0together are packaged§0
§0together.§0
Page 9 of 13 §1§lCRP§0
§0
§0§oThe Common Reuse§0
§0§oPrinciple§0
§0
§0Classes that are used§0
§0together are packaged§0
§0together.§0 §0
Page 10 of 13 §1§lADP§0
§0
§0§oThe Acyclic§0
§0§oDependencies §0§oPrinciple§0
§0
§0The dependency graph§0
§0of packages must have§0
§0no cycles.§0
Page 11 of 13 §1§lSDP§0
§0
§0§oThe Stable§0
§0§oDependencies Principle§0
§0
§0Depend in the direction§0
§0of stability.§0
Page 12 of 13 §1§lSAP§0
§0
§0§oThe Stable§0
§0§oAbstractions Principle§0
§0
§0Abstractness§0
§0increases with stability.§0
Page 13 of 13 Thank you for reading§0
§0Robert C. Martin's§0
§0principles of§0
§0Object Oriented design.§0
