FallbackResource

All Implemented Interfaces:

org.readium.r2.shared.fetcher.Resource , org.readium.r2.shared.util.SuspendingCloseable
```
public final class FallbackResource
 implements Resource
                    
```
Resource that will act as a proxy to a fallback resource if the originalResource errors out.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description
`private final File`	`file`

Constructor Summary

Constructors
Constructor	Description
`FallbackResource(Resource originalResource, Function1<Resource.Exception, Resource> fallbackResourceFactory)`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`Link`	`link()`	Returns the link from which the resource was retrieved.
`Try<Long, Resource.Exception>`	`length()`	Returns data length from metadata if available, or calculated from reading the bytes otherwise.
`Try<ByteArray, Resource.Exception>`	`read(LongRange range)`	Reads the bytes at the given range.
`Unit`	`close()`	Closes this object and releases any resources associated with it.

Methods inherited from class org.readium.r2.shared.fetcher.Resource
getFile, readAsBitmap, readAsJson, readAsString, readAsXml
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FallbackResource
```
FallbackResource(Resource originalResource, Function1<Resource.Exception, Resource> fallbackResourceFactory)
```
- Method Detail
  - link
```
 Link link()
```
    Returns the link from which the resource was retrieved.
    It might be modified by the Resource to include additional metadata, e.g. the Content-Type HTTP header in Link.type.
  - length
```
 Try<Long, Resource.Exception> length()
```
    Returns data length from metadata if available, or calculated from reading the bytes otherwise.
    This value must be treated as a hint, as it might not reflect the actual bytes length. To get the real length, you need to read the whole resource.
  - read
```
 Try<ByteArray, Resource.Exception> read(LongRange range)
```
    Reads the bytes at the given range.
    When range is null, the whole content is returned. Out-of-range indexes are clamped to the available length automatically.
  - close
```
 Unit close()
```
    Closes this object and releases any resources associated with it. If the object is already closed then invoking this method has no effect.