java.lang.Object
- org.forgerock.json.JsonPointer

All Implemented Interfaces:

Iterable<String>
```
public class JsonPointer
extends Object
implements Iterable<String>
```
Identifies a specific value within a JSON structure. Conforms with draft-pbryan-zip-json-pointer-02.
This class is immutable.

Constructor Summary

Constructors
Constructor	Description
`JsonPointer()`	Deprecated. Use `rootPtr()` instead.
`JsonPointer(Iterable<String> iterable)`	Constructs a JSON pointer from an iterable collection of reference tokens.
`JsonPointer(String pointer)`	Constructs a JSON pointer, identifying the specified pointer value.
`JsonPointer(String... tokens)`	Constructs a JSON pointer from an array of reference tokens.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`JsonPointer`	`child(int child)`	Returns a new JSON pointer, which identifies a specified child element of the array identified by this pointer.
`JsonPointer`	`child(String child)`	Returns a new JSON pointer, which identifies a specified child member of the object identified by this pointer.
`JsonPointer`	`concat(JsonPointer suffix)`	Creates a new JSON pointer which is a descendant of this JSON pointer.
`boolean`	`equals(Object o)`	Compares the specified object with this pointer for equality.
`String`	`get(int index)`	Returns the reference token at the specified position.
`String`	`getValue()`	Returns the JSON pointer string value.
`int`	`hashCode()`	Returns the hash code value for this pointer.
`JsonPointer`	`head(int endIndex)`	Returns a pointer which is a subsequence of the path elements contained in this pointer beginning with the first element (0) and ending with the element at position `endIndex-1`.
`boolean`	`isEmpty()`	Returns `true` if this pointer identifies the root value of a JSON structure.
`boolean`	`isPrefixOf(JsonPointer candidate)`	Checks whether `candidate` is an extension of this JSON Pointer.
`Iterator<String>`	`iterator()`	Returns an iterator over the pointer's reference tokens.
`String`	`leaf()`	Returns the last (leaf) reference token of the JSON pointer, or `null` if the pointer contains no reference tokens (i.e.
`JsonPointer`	`parent()`	Returns a pointer to the parent of the JSON value identified by this JSON pointer, or `null` if the pointer has no parent JSON value (i.e.
`static JsonPointer`	`ptr(Iterable<String> iterable)`	Constructs a JSON pointer from an iterable collection of reference tokens.
`static JsonPointer`	`ptr(String pointer)`	Constructs a JSON pointer, identifying the specified pointer value.
`static JsonPointer`	`ptr(String... tokens)`	Constructs a JSON pointer from an array of reference tokens.
`JsonPointer`	`relativePointer()`	Returns a pointer containing all but the first reference token contained in this pointer, or `/` if this pointer contains less than 2 reference tokens.
`JsonPointer`	`relativePointer(int sz)`	Returns a pointer containing the last `sz` reference tokens contained in this pointer.
`static JsonPointer`	`rootPtr()`	Returns a JSON pointer identifying the root value of a JSON structure.
`int`	`size()`	Returns the number of reference tokens in the pointer.
`String[]`	`toArray()`	Returns a newly allocated array of strings, containing the pointer's reference tokens.
`String`	`toString()`	Returns the JSON pointer string value.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable
forEach, spliterator

- Constructor Detail
  - JsonPointer
```
@Deprecated
public JsonPointer()
```
    Deprecated.
    Use rootPtr() instead.
    
    Constructs a JSON pointer, identifying the root value of a JSON structure.
  - JsonPointer
```
public JsonPointer(String pointer)
```
    Constructs a JSON pointer, identifying the specified pointer value.
    
    Parameters:
    
    pointer - a string containing the JSON pointer of the value to identify.
    
    Throws:
    
    JsonException - if the pointer is malformed.
  - JsonPointer
```
public JsonPointer(String... tokens)
```
    Constructs a JSON pointer from an array of reference tokens.
    
    Parameters:
    
    tokens - an array of string reference tokens.
  - JsonPointer
```
public JsonPointer(Iterable<String> iterable)
```
    Constructs a JSON pointer from an iterable collection of reference tokens.
    
    Parameters:
    
    iterable - an iterable collection of reference tokens.
- Method Detail
  - rootPtr
```
public static JsonPointer rootPtr()
```
    Returns a JSON pointer identifying the root value of a JSON structure.
    
    Returns:
    
    A JSON pointer identifying the root value of a JSON structure.
  - ptr
```
public static JsonPointer ptr(String pointer)
```
    Constructs a JSON pointer, identifying the specified pointer value.
    
    Parameters:
    
    pointer - a string containing the JSON pointer of the value to identify.
    
    Returns:
    
    The new JSON pointer
    
    Throws:
    
    JsonException - if the pointer is malformed.
  - ptr
```
public static JsonPointer ptr(String... tokens)
```
    Constructs a JSON pointer from an array of reference tokens.
    
    Parameters:
    
    tokens - an array of string reference tokens.
    
    Returns:
    
    The new json pointer
  - ptr
```
public static JsonPointer ptr(Iterable<String> iterable)
```
    Constructs a JSON pointer from an iterable collection of reference tokens.
    
    Parameters:
    
    iterable - an iterable collection of reference tokens.
    
    Returns:
    
    The new json pointer
  - size
```
public int size()
```
    Returns the number of reference tokens in the pointer.
    
    Returns:
    
    the number of reference tokens in the pointer.
  - get
```
public String get(int index)
```
    Returns the reference token at the specified position.
    
    Parameters:
    
    index - the index of the reference token to return.
    
    Returns:
    
    the reference token at the specified position.
    
    Throws:
    
    IndexOutOfBoundsException - if the index is out of range.
  - toArray
```
public String[] toArray()
```
    Returns a newly allocated array of strings, containing the pointer's reference tokens. No references to the array are maintained by the pointer. Hence, the caller is free to modify it.
    
    Returns:
    
    a newly allocated array of strings, containing the pointer's reference tokens.
  - parent
```
public JsonPointer parent()
```
    Returns a pointer to the parent of the JSON value identified by this JSON pointer, or null if the pointer has no parent JSON value (i.e. references document root).
    
    Returns:
    
    a pointer to the parent of of this JSON pointer. Can be null.
  - head
```
public JsonPointer head(int endIndex)
```
    Returns a pointer which is a subsequence of the path elements contained in this pointer beginning with the first element (0) and ending with the element at position endIndex-1. The returned pointer will therefore have the size endIndex.
    
    Parameters:
    
    endIndex - The end index, exclusive.
    
    Returns:
    
    A pointer which is a subsequence of the path elements contained in this resource path.
    
    Throws:
    
    IndexOutOfBoundsException - If endIndex is bigger than size().
  - isPrefixOf
```
public boolean isPrefixOf(JsonPointer candidate)
```
    Checks whether candidate is an extension of this JSON Pointer.
    
    Parameters:
    
    candidate - The JSON Pointer to test.
    
    Returns:
    
    true if this JSON Pointer is a prefix for the candidate JSON Pointer.
  - relativePointer
```
public JsonPointer relativePointer()
```
    Returns a pointer containing all but the first reference token contained in this pointer, or / if this pointer contains less than 2 reference tokens.
    This method yields the following results:
    
    Examples illustrating usage of relativePointer
    Input Output
    
    / /
    
    /a /
    
    /a/b /b
    
    /a/b/c /b/c
    
    Returns:
    
    A pointer containing all but the first reference token contained in this pointer.
  - relativePointer
```
public JsonPointer relativePointer(int sz)
```
    Returns a pointer containing the last sz reference tokens contained in this pointer.
    This method yields the following results:
    
    Examples illustrating usage of relativePointer
    Input sz Output
    
    /a/b/c 0 /
    
    /a/b/c 1 /c
    
    /a/b/c 2 /b/c
    
    /a/b/c 3 /a/b/c
    
    Parameters:
    
    sz - The number of trailing reference tokens to retain.
    
    Returns:
    
    A pointer containing the last sz reference tokens contained in this pointer.
    
    Throws:
    
    IndexOutOfBoundsException - If sz is negative or greater than size().
  - leaf
```
public String leaf()
```
    Returns the last (leaf) reference token of the JSON pointer, or null if the pointer contains no reference tokens (i.e. references document root).
    
    Returns:
    
    the last (leaf) reference token of the JSON pointer if it exists, null otherwise
  - child
```
public JsonPointer child(String child)
```
    Returns a new JSON pointer, which identifies a specified child member of the object identified by this pointer.
    
    Parameters:
    
    child - the name of the child member to identify.
    
    Returns:
    
    the child JSON pointer.
    
    Throws:
    
    NullPointerException - if child is null.
  - child
```
public JsonPointer child(int child)
```
    Returns a new JSON pointer, which identifies a specified child element of the array identified by this pointer.
    
    Parameters:
    
    child - the index of the child element to identify.
    
    Returns:
    
    the child JSON pointer.
    
    Throws:
    
    IndexOutOfBoundsException - if child is less than zero.
  - concat
```
public JsonPointer concat(JsonPointer suffix)
```
    Creates a new JSON pointer which is a descendant of this JSON pointer. The returned JSON pointer will have been formed of the concatenation of this JSON pointer and the provided JSON pointer.
    
    Parameters:
    
    suffix - the JSON pointer to be appended to this JSON pointer.
    
    Returns:
    
    A new JSON pointer which is a descendant of this JSON pointer.
  - isEmpty
```
public boolean isEmpty()
```
    Returns true if this pointer identifies the root value of a JSON structure. More specifically, it returns true if this pointer does not contain any reference tokens (i.e. size() == 0).
    
    Returns:
    
    true if this pointer identifies the root value of a JSON structure.
  - iterator
```
public Iterator<String> iterator()
```
    Returns an iterator over the pointer's reference tokens.
    
    Specified by:
    
    iterator in interface Iterable<String>
    
    Returns:
    
    an iterator over the pointer's reference tokens.
  - toString
```
public String toString()
```
    Returns the JSON pointer string value.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    the JSON pointer string value.
  - getValue
```
public String getValue()
```
    Returns the JSON pointer string value.
    
    Returns:
    
    the JSON pointer string value.
  - equals
```
public boolean equals(Object o)
```
    Compares the specified object with this pointer for equality. Returns true if and only if the specified object is also a JSON pointer, both pointers have the same size, and all corresponding pairs of reference tokens in the two pointers are equal.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    
    o - the object to be compared for equality with this pointer.
    
    Returns:
    
    true if the specified object is equal to this pointer.
  - hashCode
```
public int hashCode()
```
    Returns the hash code value for this pointer.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    
    the hash code value for this pointer.

Examples illustrating usage of relativePointer
Input	Output
/	`/`
/a	`/`
/a/b	/b
/a/b/c	/b/c

Examples illustrating usage of relativePointer
Input	sz	Output
/a/b/c	0	/
/a/b/c	1	/c
/a/b/c	2	/b/c
/a/b/c	3	/a/b/c

Class JsonPointer

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.Iterable

Constructor Detail

JsonPointer

JsonPointer

JsonPointer

JsonPointer

Method Detail

rootPtr

ptr

ptr

ptr

size

get

toArray

parent

head

isPrefixOf

relativePointer

relativePointer

leaf

child

child

concat

isEmpty

iterator

toString

getValue

equals

hashCode