au.com.codeka.carrot.bindings

Class Composite

java.lang.Object

au.com.codeka.carrot.bindings.Composite

All Implemented Interfaces:

Bindings

public final class Composite
extends java.lang.Object
implements Bindings

Composite Bindings which combines the values of other Bindings into one. Note that the order is important in case two bindings contain a value with the same key. In such case the first binding wins.

To avoid conflicts, you can insert "prefix" sub-bindings like so

 new Composite(
    new MapBindings(map),
    new SingletonBindings("$json", new JsonObjectBindings(jsonObject));
 )
 

Given that the key "key" exists in both, the map and the jsonObject you would access them like:

 Map key: {{ key }}
 JSON key: {{ $json.key }}
 

Constructor Summary

Constructors

Constructor and Description
Composite(Bindings... bindings)
Composite(java.lang.Iterable<Bindings> bindingsIterable)

Method Summary

Modifier and Type	Method and Description
boolean	isEmpty() Returns whether these Bindings contain any values.
java.lang.Object	resolve(java.lang.String key) Returns a value for the given key or null if no such key exists in these Bindings.

Methods inherited from class java.lang.Object

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

Constructor Detail

Composite

public Composite(Bindings... bindings)

Composite

public Composite(java.lang.Iterable<Bindings> bindingsIterable)

Method Detail

resolve

public java.lang.Object resolve(@Nonnull
                                java.lang.String key)

Description copied from interface: Bindings

Returns a value for the given key or null if no such key exists in these Bindings.

Specified by:

resolve in interface Bindings

Parameters:

key - The key to resolve.

Returns:

An Object or null.

isEmpty

public boolean isEmpty()

Description copied from interface: Bindings

Returns whether these Bindings contain any values.

Specified by:

isEmpty in interface Bindings

Returns:

true if these Bindings are empty, false if there is at least one value.