org.springframework.boot.buildpack.platform.json

Class MappedObject

java.lang.Object

org.springframework.boot.buildpack.platform.json.MappedObject

Direct Known Subclasses:

ContainerStatus, Image, ImageConfig

public class MappedObject
extends Object

Base class for mapped JSON objects.

Since:

2.3.0

Author:

Phillip Webb

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static interface	MappedObject.ContentReader<C> Strategy used to read JSON content.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MappedObject(com.fasterxml.jackson.databind.JsonNode node, MethodHandles.Lookup lookup) Create a new MappedObject instance.

Method Summary

Modifier and Type	Method and Description
protected com.fasterxml.jackson.databind.JsonNode	getNode() Return the source node of the mapped object.
protected static <T extends MappedObject> T	getRoot(Object proxy)
protected static <T extends MappedObject,C> T	of(C content, MappedObject.ContentReader<C> reader, Function<com.fasterxml.jackson.databind.JsonNode,T> factory) Factory method to create a new MappedObject instance.
protected static <T extends MappedObject> T	of(InputStream content, Function<com.fasterxml.jackson.databind.JsonNode,T> factory) Factory method to create a new MappedObject instance.
protected static <T extends MappedObject> T	of(String content, Function<com.fasterxml.jackson.databind.JsonNode,T> factory) Factory method to create a new MappedObject instance.
protected static <T> T	valueAt(Object proxy, String expression, Class<T> type)
protected <T> T	valueAt(String expression, Class<T> type) Get the value at the given JSON path expression as a specific type.

Methods inherited from class java.lang.Object

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

Constructor Detail

MappedObject

protected MappedObject(com.fasterxml.jackson.databind.JsonNode node,
                       MethodHandles.Lookup lookup)

Create a new MappedObject instance.

Parameters:

node - the source node

lookup - method handle lookup

Method Detail

getNode

protected final com.fasterxml.jackson.databind.JsonNode getNode()

Return the source node of the mapped object.

Returns:

the source node

valueAt

protected <T> T valueAt(String expression,
                        Class<T> type)

Get the value at the given JSON path expression as a specific type.

Type Parameters:

T - the data type

Parameters:

expression - the JSON path expression

type - the desired type. May be a simple JSON type or an interface

Returns:

the value

getRoot

protected static <T extends MappedObject> T getRoot(Object proxy)

valueAt

protected static <T> T valueAt(Object proxy,
                               String expression,
                               Class<T> type)

of

protected static <T extends MappedObject> T of(String content,
                                               Function<com.fasterxml.jackson.databind.JsonNode,T> factory)
                                        throws IOException

Factory method to create a new MappedObject instance.

Type Parameters:

T - the mapped object type

Parameters:

content - the JSON content for the object

factory - a factory to create the mapped object from a JsonNode

Returns:

the mapped object

Throws:

IOException - on IO error

of

protected static <T extends MappedObject> T of(InputStream content,
                                               Function<com.fasterxml.jackson.databind.JsonNode,T> factory)
                                        throws IOException

Factory method to create a new MappedObject instance.

Type Parameters:

T - the mapped object type

Parameters:

content - the JSON content for the object

factory - a factory to create the mapped object from a JsonNode

Returns:

the mapped object

Throws:

IOException - on IO error

of

protected static <T extends MappedObject,C> T of(C content,
                                                 MappedObject.ContentReader<C> reader,
                                                 Function<com.fasterxml.jackson.databind.JsonNode,T> factory)
                                          throws IOException

Factory method to create a new MappedObject instance.

Type Parameters:

T - the mapped object type

C - the content type

Parameters:

content - the JSON content for the object

reader - the content reader

factory - a factory to create the mapped object from a JsonNode

Returns:

the mapped object

Throws:

IOException - on IO error