ComparableBackup 0.78.1 API

All Implemented Interfaces:

org.signal.libsignal.internal.NativeHandleGuard.Owner
```
public class ComparableBackup
extends NativeHandleGuard.SimpleOwner
                    
```
An in-memory representation of a backup file used to compare contents.
When comparing the contents of two backups:
- Create a `ComparableBackup` instance for each of the inputs.
- Check the `unknownFields()` value; if it's not empty, some parts of the backup weren't parsed and won't be compared.
- Produce a canonical string for each backup with `comparableString()`.
Compare the canonical string representations. The diff of the canonical strings (which may be rather large) will show the differences between the logical content of the input backup files.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`static ComparableBackup`	`readUnencrypted(MessageBackup.Purpose purpose, InputStream input, long streamLength)`	Reads an unencrypted message backup bundle into memory for comparison.
`String`	`getComparableString()`	Produces a string representation of the contents.
`Array<String>`	`getUnknownFieldMessages()`	Returns the unrecognized protobuf fields present in the backup.

Methods inherited from class org.signal.libsignal.internal.NativeHandleGuard.SimpleOwner
unsafeNativeHandleWithoutGuard
Methods inherited from class org.signal.libsignal.internal.NativeHandleGuard.Owner
guard, guardedMap, guardedMapChecked, guardedRun, guardedRunChecked
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
- Method Detail
  - readUnencrypted
```
 static ComparableBackup readUnencrypted(MessageBackup.Purpose purpose, InputStream input, long streamLength)
```
    Reads an unencrypted message backup bundle into memory for comparison.
    Returns an error if the input cannot be read or if validation fails.
    
    Parameters:
    
    purpose - whether the input was created for device-to-device transfer or remote backup
    
    input - an InputStream that produces the input
    
    streamLength - the number of bytes each InputStream will produce
  - getComparableString
```
 String getComparableString()
```
    Produces a string representation of the contents.
    The returned strings for two backups will be equal if the backups contain the same logical content. If two backups' strings are not equal, the diff will show what is different between them.
    
    Returns:
    
    a canonical string representation of the backup
  - getUnknownFieldMessages
```
 Array<String> getUnknownFieldMessages()
```
    Returns the unrecognized protobuf fields present in the backup.
    If the returned array is not empty, some parts of the backup were not recognized and won't be present in the string representation.
    
    Returns:
    
    information about each unknown field found in the backup