Package com.google.cloud.tools.jib.image

Interface Layer

All Known Implementing Classes:

CachedLayer, DigestOnlyLayer, ReferenceLayer, ReferenceNoDiffIdLayer

public interface Layer

Represents a layer in an image. Implementations represent the various types of layers.

An image layer consists of:

• Content BLOB
• • The compressed archive (tarball gzip) of the partial filesystem changeset.
• Content Digest
• • The SHA-256 hash of the content BLOB.
• Content Size
• • The size (in bytes) of the content BLOB.
• Diff ID
• • The SHA-256 hash of the uncompressed archive (tarball) of the partial filesystem changeset.

Method Summary

Modifier and Type	Method	Description
Blob	getBlob()	Returns this layer's contents.
BlobDescriptor	getBlobDescriptor()	Returns this layer's content descriptor.
DescriptorDigest	getDiffId()	Returns this layer's diff ID.

Method Detail

getBlob

Blob getBlob()
      throws LayerPropertyNotFoundException

Returns this layer's contents.

Returns:

the layer's content BLOB

Throws:

LayerPropertyNotFoundException - if not available

getBlobDescriptor

BlobDescriptor getBlobDescriptor()
                          throws LayerPropertyNotFoundException

Returns this layer's content descriptor.

Returns:

the layer's content BlobDescriptor

Throws:

LayerPropertyNotFoundException - if not available

getDiffId

DescriptorDigest getDiffId()
                    throws LayerPropertyNotFoundException

Returns this layer's diff ID.

Returns:

the layer's diff ID

Throws:

LayerPropertyNotFoundException - if not available