Package edu.wisc.library.ocfl.core.path.constraint

Class ContentPathConstraints

java.lang.Object

edu.wisc.library.ocfl.core.path.constraint.ContentPathConstraints

public final class ContentPathConstraints
extends Object

This class provides default path constraints that can be applied to OCFL content paths to attempt to ensure portability across various filesystems. It is useful to apply constraints for filesystems other than the local filesystem, as the local filesystem will readily enforce its own constraints.

The constraints defined here are generalizations and do not exhaustively target specific filesystems. If you have specific needs that are not addressed here, create a custom ContentPathConstraintProcessor.

The following constraints are ALWAYS applied:

• Cannot have a leading OR trailing /
• Cannot contain the following filenames: '.', '..'
• Cannot contain an empty filename
• Windows only: Cannot contain a \

Method Summary

Modifier and Type	Method	Description
static ContentPathConstraintProcessor	all()	Constructs a ContentPathConstraintProcessor that applies the minimum path constraints across Unix, Windows, and cloud filesystems.
static ContentPathConstraintProcessor	cloud()	Constructs a ContentPathConstraintProcessor that applies the minimum path constraints across cloud providers (Amazon, Azure, Google).
static ContentPathConstraintProcessor	none()	Constructs a ContentPathConstraintProcessor that does no special validation.
static ContentPathConstraintProcessor	unix()	Constructs a ContentPathConstraintProcessor that applies the minimum path constraints on a unix based filesystem.
static ContentPathConstraintProcessor	windows()	Constructs a ContentPathConstraintProcessor that applies the minimum path constraints on a Windows based filesystem.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

unix

public static ContentPathConstraintProcessor unix()

Constructs a ContentPathConstraintProcessor that applies the minimum path constraints on a unix based filesystem. This does not guarantee that every path that passes validation will work on any unix based filesystem, but the most problematic characters are prohibited.

• Comparison of File Systems

Returns:

ContentPathConstraintProcessor

windows

public static ContentPathConstraintProcessor windows()

Constructs a ContentPathConstraintProcessor that applies the minimum path constraints on a Windows based filesystem. This does not guarantee that every path that passes validation will work on any Windows based filesystem, but the most problematic characters are prohibited.

• Comparison of File Systems
• Windows File Naming

Returns:

ContentPathConstraintProcessor

cloud

public static ContentPathConstraintProcessor cloud()

Constructs a ContentPathConstraintProcessor that applies the minimum path constraints across cloud providers (Amazon, Azure, Google). This does not guarantee that every path that passes validation will work with all cloud providers, but the most problematic characters are prohibited.

• Amazon S3
• Azure Blob Storage
• Google Cloud Storage
• Azure additional

Returns:

ContentPathConstraintProcessor

all

public static ContentPathConstraintProcessor all()

Constructs a ContentPathConstraintProcessor that applies the minimum path constraints across Unix, Windows, and cloud filesystems. This does not guarantee that every path that passes validation will work on any filesystem, but the most problematic characters across systems are prohibited.

• Comparison of File Systems
• Windows File Naming
• Amazon S3
• Azure Blob Storage
• Google Cloud Storage
• Azure additional

Returns:

ContentPathConstraintProcessor

none

public static ContentPathConstraintProcessor none()

Constructs a ContentPathConstraintProcessor that does no special validation.

Returns:

ContentPathConstraintProcessor