AttachmentStorage - corda

corda / net.corda.core.node.services / AttachmentStorage

# AttachmentStorage

`@DoNotImplement interface AttachmentStorage`

An attachment store records potentially large binary objects, identified by their hash.

### Functions

#### getLatestContractAttachments | Find the Attachment Id(s) of the contract attachments with the highest version for a given contract class name from trusted upload sources. Return highest version of both signed and unsigned attachment ids (signed first, unsigned second), otherwise return a single signed or unsigned version id, or an empty list if none meet the criteria. `abstract fun getLatestContractAttachments(contractClassName: String, minContractVersion: Int = DEFAULT_CORDAPP_VERSION): List<AttachmentId>`
#### hasAttachment | Searches for an attachment already in the store `abstract fun hasAttachment(attachmentId: AttachmentId): Boolean`
#### importAttachment | Inserts the given attachment into the store, does not close the input stream. This can be an intensive operation due to the need to copy the bytes to disk and hash them along the way. `abstract fun importAttachment(jar: InputStream): AttachmentId` Inserts the given attachment with additional metadata, see importAttachment for input stream handling Extra parameters: `abstract fun importAttachment(jar: InputStream, uploader: String, filename: String?): AttachmentId`
#### importOrGetAttachment | Inserts or returns Attachment Id of attachment. Does not throw an exception if already uploaded. `abstract fun importOrGetAttachment(jar: InputStream): AttachmentId`
#### openAttachment | Returns a handle to a locally stored attachment, or null if it's not known. The handle can be used to open a stream for the data, which will be a zip/jar file. `abstract fun openAttachment(id: AttachmentId): Attachment?`
#### queryAttachments | Searches attachment using given criteria and optional sort rules `abstract fun queryAttachments(criteria: AttachmentQueryCriteria, sorting: AttachmentSort? = null): List<AttachmentId>``open fun queryAttachments(criteria: AttachmentQueryCriteria): List<AttachmentId>`

### Inheritors

#### MockAttachmentStorage | A mock implementation of AttachmentStorage for use within tests `class MockAttachmentStorage : AttachmentStorage, SingletonSerializeAsToken`