Footprint (eo-maven-plugin 0.37.0 API)

All Known Implementing Classes:

FtCached, FtDefault
```
public interface Footprint
```
Footprint is a term used to refer to a trace of an EO program on the file system.
It's a fitting analogy with the word's natural meaning, and what it essentially does is trace files that have a specific extension. Footprint enables you to do the following: - Save files that have a specific extension - Load files that have a specific extension - Get a complete list of files that have a specific extension

You can find a full list of available methods below.

Since Footprint can leave traces on the file system, each Footprint instance will have its own unique way of saving and loading files, and it will have its own place to do so. For instance, FtDefault will save files directly to a specific location on the file system, while FtCached will first check the cache directory before delegating the behavior. In other words, Footprint provides useful functionality for working with files that have different extensions.

Since:

1.0

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`List<Path>`	`list(String ext)`	Get list of saved regular files with ext.
`String`	`load(String program, String ext)`	Get program content of a specific type.
`void`	`save(String program, String ext, org.cactoos.Scalar<String> content)`	Save content.

- Method Detail
  - load
```
String load(String program,
            String ext)
     throws IOException
```
    Get program content of a specific type.
    That is, if the file contains "hello", it will return the string "hello".
    
    Parameters:
    
    program - Program name
    
    ext - File extension which defines the type
    
    Returns:
    
    Content of a file
    
    Throws:
    
    IOException - In case of IO issue.
  - save
```
void save(String program,
          String ext,
          org.cactoos.Scalar<String> content)
   throws IOException
```
    Save content.
    Leaves a "footprint" in the directory. So it can create a new file in the file system. Where it will create this file depends on the implementation.
    
    Parameters:
    
    program - Program name
    
    ext - File extension
    
    content - File content
    
    Throws:
    
    IOException - In case of IO issues
  - list
```
List<Path> list(String ext)
         throws IOException
```
    Get list of saved regular files with ext.
    
    Parameters:
    
    ext - File extension
    
    Returns:
    
    List of files
    
    Throws:
    
    IOException - In case of IO issues