Package io.debezium.document

Interface Path

All Superinterfaces:

Iterable<String>

All Known Implementing Classes:

Paths.ChildPath, Paths.MultiSegmentPath, Paths.RootPath, Paths.SingleSegmentPath

@Immutable
public interface Path
extends Iterable<String>

A representation of multiple name segments that together form a path within Document.

Author:

Randall Hauch

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	Path.Segments

Method Summary

Modifier and Type	Method	Description
Path	append(Path relPath)	Create a new path consisting of this path appended with the given path that will be treated as a relative path.
default Path	append(String relPath)	Create a new path consisting of this path with one or more additional segments given by the relative path.
default void	fromRoot(Consumer<Path> consumer)	Call the consumer with the path of every ancestor (except root) down to this path.
default boolean	isMultiple()	Return whether this path has more than one segment.
default boolean	isRoot()	Return whether this path is the root path with no segments.
default boolean	isSingle()	Return whether this path has a single segment.
Optional<String>	lastSegment()	Get the last segment, if there is one.
static Optional<Path>	optionalRoot()	Get an Optional reference to the root path.
Optional<Path>	parent()	Get the optional parent path.
static Path	parse(String path)	Parse a JSON Path expression.
static Path	parse(String path, boolean resolveJsonPointerEscapes)	Parse a JSON Path expression.
static Path	root()	Get the zero-length path.
String	segment(int index)	Get the segment at the given index.
int	size()	Get the number of segments in the path.
Path	subpath(int length)	Get a portion of this path that has a specified number of segments.
String	toRelativePath()	Obtain the representation of this path as a relative path without the leading '/'.

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Method Detail

root

static Path root()

Get the zero-length path.

Returns:

the shared root path; never null

optionalRoot

static Optional<Path> optionalRoot()

Get an Optional reference to the root path. The resulting Optional will always be present.

Returns:

the shared optional root path; never null

parse

static Path parse(String path)

Parse a JSON Path expression. Segments are separated by a single forward slash ('/'); any '~' or '/ ' literals must be escaped. Trailing slashes are ignored.

Parameters:

path - the path as a string; may not be null, but may be an empty string or "/" for a root path

Returns:

the path object; never null

parse

static Path parse(String path,
                  boolean resolveJsonPointerEscapes)

Parse a JSON Path expression. Segments are separated by a single forward slash ('/'); any '~' or '/ ' literals must be escaped. Trailing slashes are ignored.

Parameters:

path - the path as a string; may not be null, but may be an empty string or "/" for a root path

resolveJsonPointerEscapes - true if '~' and '/ ' literals are to be escaped as '~0' and '~1', respectively, or false if they are not to be escaped

Returns:

the path object; never null

isRoot

default boolean isRoot()

Return whether this path is the root path with no segments. This method is equivalent to size() == 0.

Returns:

true if this path contains exactly one segment, or false otherwise

isSingle

default boolean isSingle()

Return whether this path has a single segment. This method is equivalent to size() == 1.

Returns:

true if this path contains exactly one segment, or false otherwise

isMultiple

default boolean isMultiple()

Return whether this path has more than one segment. This method is equivalent to size() > 1.

Returns:

true if this path contains exactly one segment, or false otherwise

size

int size()

Get the number of segments in the path.

Returns:

the size of the path; never negative

parent

Optional<Path> parent()

Get the optional parent path.

Returns:

an optional containing the parent (if this is not the root path), or an empty optional if this is the root path.

lastSegment

Optional<String> lastSegment()

Get the last segment, if there is one.

Returns:

an optional containing the last segment of this path (if this is not the root path), or an empty optional if this is the root path.

subpath

Path subpath(int length)

Get a portion of this path that has a specified number of segments.

Parameters:

length - the number of segments

Returns:

the subpath, or this path if the supplied length is equal to this.size()

segment

String segment(int index)

Get the segment at the given index.

Parameters:

index - the index of the segment

Returns:

the segment

Throws:

IllegalArgumentException - if the index value is equal to or greater than #size()

append

default Path append(String relPath)

Create a new path consisting of this path with one or more additional segments given by the relative path.

Parameters:

relPath - the relative path to be appended to this path; may not be null

Returns:

the new path

append

Path append(Path relPath)

Create a new path consisting of this path appended with the given path that will be treated as a relative path.

Parameters:

relPath - the relative path to be appended to this path; may not be null

Returns:

the new path

toRelativePath

String toRelativePath()

Obtain the representation of this path as a relative path without the leading '/'.

Returns:

the relative path; never null but may be empty

fromRoot

default void fromRoot(Consumer<Path> consumer)

Call the consumer with the path of every ancestor (except root) down to this path.

Parameters:

consumer - the function to call on each path segment