Package software.amazon.smithy.syntax

Class TreeCursor

java.lang.Object

software.amazon.smithy.syntax.TreeCursor

All Implemented Interfaces:

FromSourceLocation

public final class TreeCursor
extends java.lang.Object
implements FromSourceLocation

Externally traverses a TokenTree to provide access to parents and siblings.

See Also:

TokenTree.zipper()

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
TreeCursor	findAt(int line, int column)	Find the innermost tree that contains the given coordinates.
java.util.List<TreeCursor>	findChildrenByType(TreeType... types)	Recursively find every node in the tree that has the given TreeType.
java.util.List<TreeCursor>	getChildren()	Get all children of the tree as a list of cursors.
java.util.List<TreeCursor>	getChildrenByType(TreeType... types)	Get direct children from the current tree of a specific type.
TreeCursor	getFirstChild()	Get the first child of the wrapped tree.
TreeCursor	getFirstChild(TreeType type)	Get the first child of the wrapped tree with the given type.
TreeCursor	getLastChild()	Get the last child of the wrapped tree.
TreeCursor	getLastChild(TreeType type)	Get the last child of the wrapped tree with the given type.
TreeCursor	getNextSibling()	Get the next sibling of this tree, if present.
TreeCursor	getParent()	Get the parent cursor, or null if not present.
java.util.List<TreeCursor>	getPathToCursor()	Get a list of tree cursors that lead up to the current tree, starting from the root as the first element, and including the current tree as the last element.
TreeCursor	getPreviousSibling()	Get the previous sibling of this tree, if present.
TreeCursor	getRoot()	Get the root of the tree, returning itself if the tree has no parent.
SourceLocation	getSourceLocation()	Gets the source location of a value.
TokenTree	getTree()	Get the wrapped TokenTree.
int	hashCode()
static TreeCursor	of(TokenTree tree)	Create a TreeCursor from the given TokenTree, treating it as the root of the tree.

Methods inherited from class java.lang.Object

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

Method Detail

of

public static TreeCursor of(TokenTree tree)

Create a TreeCursor from the given TokenTree, treating it as the root of the tree.

Parameters:

tree - Tree to create a cursor from.

Returns:

Returns the created cursor.

getSourceLocation

public SourceLocation getSourceLocation()

Description copied from interface: FromSourceLocation

Gets the source location of a value.

Specified by:

getSourceLocation in interface FromSourceLocation

Returns:

Returns the source location of the value.

getTree

public TokenTree getTree()

Get the wrapped TokenTree.

Returns:

Return the token tree.

getParent

public TreeCursor getParent()

Get the parent cursor, or null if not present.

Returns:

Nullable parent cursor.

getRoot

public TreeCursor getRoot()

Get the root of the tree, returning itself if the tree has no parent.

Returns:

Non-nullable root tree.

getPathToCursor

public java.util.List<TreeCursor> getPathToCursor()

Get a list of tree cursors that lead up to the current tree, starting from the root as the first element, and including the current tree as the last element.

Returns:

Returns the path to the current tree from the root.

getPreviousSibling

public TreeCursor getPreviousSibling()

Get the previous sibling of this tree, if present.

Returns:

Return the nullable previous sibling.

getNextSibling

public TreeCursor getNextSibling()

Get the next sibling of this tree, if present.

Returns:

Return the nullable next sibling.

getChildren

public java.util.List<TreeCursor> getChildren()

Get all children of the tree as a list of cursors.

Returns:

Return the cursors to each child.

getChildrenByType

public java.util.List<TreeCursor> getChildrenByType(TreeType... types)

Get direct children from the current tree of a specific type.

Parameters:

types - Types of children to get.

Returns:

Returns the collected children, or an empty list.

getFirstChild

public TreeCursor getFirstChild()

Get the first child of the wrapped tree.

Returns:

Return the first child, or null if the tree has no children.

getFirstChild

public TreeCursor getFirstChild(TreeType type)

Get the first child of the wrapped tree with the given type.

Parameters:

type - Child type to get.

Returns:

Return the first child, or null if a matching child is not found.

getLastChild

public TreeCursor getLastChild()

Get the last child of the wrapped tree.

Returns:

Return the last child, or null if the tree has no children.

getLastChild

public TreeCursor getLastChild(TreeType type)

Get the last child of the wrapped tree with the given type.

Parameters:

type - Child type to get.

Returns:

Return the last child, or null if a matching child is not found.

findChildrenByType

public java.util.List<TreeCursor> findChildrenByType(TreeType... types)

Recursively find every node in the tree that has the given TreeType.

Parameters:

types - Types of children to return.

Returns:

Returns the matching tree cursors.

findAt

public TreeCursor findAt(int line,
                         int column)

Find the innermost tree that contains the given coordinates.

Parameters:

line - Line to find.

column - Column to find.

Returns:

Returns the innermost tree that contains the coordinates.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object