Wrapper
A wrapper is a software component that encloses or delegates to another component or operation while exposing an adapted interface or adding behavior.
Simple Object-Oriented Design: Create clean, maintainable applications
A wrapper class is a class that groups or adapts other components behind a simpler interface.
- How it is used
- Contains external APIs or groups collaborators so domain code depends on simpler, owned interfaces.
- How deep it goes
- Explains wrapper boundaries, conversion, dependency grouping, benefits, and tradeoffs without prescribing a universal abstraction scheme.
- Examples
- Uses a payment gateway adapter, report generation adapter, AWS integration boundary, and MessageBot grouping Bot with UserDirectory.
- What you can do after
- Apply it by creating domain-focused boundaries that localize external-library changes and simplify direct dependencies.
Read how Simple Object-Oriented Design: Create clean, maintainable applications explains wrapper →
Practical Automation with PowerShell: Effective scripting from the console to the cloud
A wrapper function is a function that provides a simplified or specialized interface around other operations or functions.
- How it is used
- Simplifies recurring configuration selection and external-tool invocation in reusable PowerShell automations.
- How deep it goes
- Builds complete parameterized functions and data-flow logic, stopping short of general wrapper design theory.
- Examples
- Uses server configuration selection and processor-time graph generation as operational wrapper examples.
- What you can do after
- Build it from scratch as reusable PowerShell functions that select configurations or prepare data for another executable.
Learn PowerShell Scripting in a Month of Lunches, Second Edition: Write and organize scripts and tools
A wrapper is a software layer that presents an existing component or interface through a different, usually simpler interface.
- How it is used
- Translates lower-level .NET and Windows interfaces into consistent, administrator-friendly PowerShell commands.
- How deep it goes
- Demonstrates wrapper internals through assembly loading, object lifetime, pipeline blocks, synchronous calls, asynchronous calls, and output suppression.
- Examples
- Uses Invoke-Speech with piped phrases, synchronous Speak, asynchronous SpeakAsync, and suppressed completion output.
- What you can do after
- Build it from scratch as a PowerShell-compliant command that hides .NET details and provides testable, reusable behavior.
Machine Learning System Design
A software component that encapsulates another component behind a controlled interface while coordinating surrounding infrastructure behavior.
- How it is used
- Deploys model predictions behind a stable API while coordinating infrastructure releases, monitoring, and compatibility.
- How deep it goes
- Explains API responsibilities and release practices, but stops short of implementation code or internal wrapper mechanics.
- Examples
- Uses a prediction endpoint with query parameters and a JSON response containing SKU, demand, entity, and period.
- What you can do after
- Operate/configure a prediction service with separated wrapper and model release processes.
Related concepts
- dependencyuses · A software dependency is a component, resource, or prerequisite on which another software component or operation relies to function or proceed.
- Rcincludes · Rc is Rust’s single-threaded reference-counted smart pointer for shared ownership of a value.
- PowerShellincludes · PowerShell is Microsoft's cross-platform command shell and scripting language for administering computer systems and automating tasks.
- defensive copyuses · A defensive copy is an independently created duplicate of mutable data that prevents subsequent external modifications from affecting retained state.
These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.