io.vertx.core.json.pointer

Interface JsonPointerIterator

public interface JsonPointerIterator

The JsonPointerIterator is used by the read/write algorithms of the JsonPointer to read/write the querying data structure
Every method takes the currentValue as parameter, representing the actual value held by the query algorithm.
Implementations of this interface should be stateless, so they can be reused
You can implement this interface to query the structure you want using json pointers

Author:

Francesco Guardiani @slinkydeveloper

Field Summary

Fields

Modifier and Type	Field and Description
static JsonPointerIterator	JSON_ITERATOR Instance of a JsonPointerIterator to query Vert.x Json structures

Method Summary

Modifier and Type	Method and Description
boolean	appendArrayElement(Object currentValue, Object value) Append array element
Object	getArrayElement(Object currentValue, int i) Move the iterator the the array element at specified index
Object	getObjectParameter(Object currentValue, String key, boolean createOnMissing) Returns the object parameter with specified key.
boolean	isArray(Object currentValue)
boolean	isNull(Object currentValue)
boolean	isObject(Object currentValue)
boolean	objectContainsKey(Object currentValue, String key)
boolean	writeArrayElement(Object currentValue, int i, Object value) Write array element at specified index
boolean	writeObjectParameter(Object currentValue, String key, Object value) Write object parameter at specified key

Field Detail

JSON_ITERATOR

static final JsonPointerIterator JSON_ITERATOR

Instance of a JsonPointerIterator to query Vert.x Json structures

Method Detail

isObject

boolean isObject(Object currentValue)

Parameters:

currentValue -

Returns:

true if the current value is a queryable object

isArray

boolean isArray(Object currentValue)

Parameters:

currentValue -

Returns:

true if the current value is a queryable array

isNull

boolean isNull(Object currentValue)

Parameters:

currentValue -

Returns:

true if the current value is null/empty

objectContainsKey

boolean objectContainsKey(Object currentValue,
                          String key)

Parameters:

currentValue -

key - object key

Returns:

true if current value is a queryable object that contains the specified key

getObjectParameter

Object getObjectParameter(Object currentValue,
                          String key,
                          boolean createOnMissing)

Returns the object parameter with specified key.

Parameters:

currentValue -

key - object key

createOnMissing - If the current value is an object that doesn't contain the key, put an empty object at provided key

Returns:

the requested object parameter, or null if the method was not able to find it

getArrayElement

Object getArrayElement(Object currentValue,
                       int i)

Move the iterator the the array element at specified index

Parameters:

currentValue -

i - array index

Returns:

the request array element, or null if the method was not able to find it

writeObjectParameter

boolean writeObjectParameter(Object currentValue,
                             String key,
                             Object value)

Write object parameter at specified key

Parameters:

currentValue -

key -

value -

Returns:

true if the operation is successful

writeArrayElement

boolean writeArrayElement(Object currentValue,
                          int i,
                          Object value)

Write array element at specified index

Parameters:

currentValue -

i -

value -

Returns:

true if the operation is successful

appendArrayElement

boolean appendArrayElement(Object currentValue,
                           Object value)

Append array element

Parameters:

currentValue -

value -

Returns:

true if the operation is successful