Package org.sonar.sslr.internal.ast.select

Class EmptyAstSelect

java.lang.Object

org.sonar.sslr.internal.ast.select.EmptyAstSelect

All Implemented Interfaces:

Iterable<AstNode>, AstSelect

public class EmptyAstSelect
extends Object
implements AstSelect

AstSelect which contains no elements.

Constructor Summary

Constructors

Constructor	Description
EmptyAstSelect()

Method Summary

Modifier and Type	Method	Description
AstSelect	children()	Returns new selection, which contains children of this selection.
AstSelect	children(AstNodeType type)	Returns new selection, which contains children of a given type of this selection.
AstSelect	children(AstNodeType... types)	Returns new selection, which contains children of a given types of this selection.
AstSelect	descendants(AstNodeType type)	Returns new selection, which contains descendants of a given type of this selection.
AstSelect	descendants(AstNodeType... types)	Returns new selection, which contains descendants of a given types of this selection.
AstSelect	filter(AstNodeType type)	Returns new selection, which contains elements of this selection that have given type.
AstSelect	filter(AstNodeType... types)	Returns new selection, which contains elements of this selection that have any one of the given types.
AstSelect	filter(Predicate<AstNode> predicate)	Returns new selection, which contains elements of this selection that satisfy a predicate.
AstSelect	firstAncestor(AstNodeType type)	Returns new selection, which contains first ancestor of a given type for each node from this selection.
AstSelect	firstAncestor(AstNodeType... types)	Returns new selection, which contains first ancestor of one of the given types for each node from this selection.
AstNode	get(int index)	Returns the element at the specified position in this selection.
boolean	isEmpty()	Returns true if this selection contains no elements.
boolean	isNotEmpty()	Returns true if this selection contains elements.
Iterator<AstNode>	iterator()	Returns an iterator over the elements in this selection.
AstSelect	nextSibling()	Returns new selection, which contains next sibling for each node from this selection.
AstSelect	parent()	Returns new selection, which contains parent for each node from this selection.
AstSelect	previousSibling()	Returns new selection, which contains previous sibling for each node from this selection.
int	size()	Returns the number of elements in this selection.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

EmptyAstSelect

public EmptyAstSelect()

Method Details

children

public AstSelect children()

Description copied from interface: AstSelect

Returns new selection, which contains children of this selection.

Specified by:

children in interface AstSelect

children

public AstSelect children(AstNodeType type)

Description copied from interface: AstSelect

Returns new selection, which contains children of a given type of this selection.

In the following case, children("B") would return "B2" and "B3":

 A1
  |__ C1
  |    |__ B1
  |__ B2
  |__ B3
 

Specified by:

children in interface AstSelect

children

public AstSelect children(AstNodeType... types)

Description copied from interface: AstSelect

Returns new selection, which contains children of a given types of this selection.

Specified by:

children in interface AstSelect

See Also:

• AstSelect.children(AstNodeType)

nextSibling

public AstSelect nextSibling()

Description copied from interface: AstSelect

Returns new selection, which contains next sibling for each node from this selection.

In the following case, for selection "B1" nextSibling() would return "B2":

 A1
  |__ B1
  |    |__ C1
  |__ B2
 

Specified by:

nextSibling in interface AstSelect

previousSibling

public AstSelect previousSibling()

Description copied from interface: AstSelect

Returns new selection, which contains previous sibling for each node from this selection.

In the following case, for selection "B2" previousSibling() would return "B1":

 A1
  |__ B1
  |    |__ C1
  |__ B2
 

Specified by:

previousSibling in interface AstSelect

parent

public AstSelect parent()

Description copied from interface: AstSelect

Returns new selection, which contains parent for each node from this selection.

Specified by:

parent in interface AstSelect

firstAncestor

public AstSelect firstAncestor(AstNodeType type)

Description copied from interface: AstSelect

Returns new selection, which contains first ancestor of a given type for each node from this selection.

In the following case, for selection "B2" firstAncestor("A") would return "A2":

 A1
  |__ A2
       |__ B1
       |__ B2
 

Specified by:

firstAncestor in interface AstSelect

firstAncestor

public AstSelect firstAncestor(AstNodeType... types)

Description copied from interface: AstSelect

Returns new selection, which contains first ancestor of one of the given types for each node from this selection.

Specified by:

firstAncestor in interface AstSelect

See Also:

• AstSelect.firstAncestor(AstNodeType)

descendants

public AstSelect descendants(AstNodeType type)

Description copied from interface: AstSelect

Returns new selection, which contains descendants of a given type of this selection. Be careful, this method searches among all descendants whatever is their depth, so favor AstSelect.children(AstNodeType) when possible.

In the following case, getDescendants("B") would return "B1", "B2" and "B3":

 A1
  |__ C1
  |    |__ B1
  |__ B2
  |__ D1
  |__ B3
 

Specified by:

descendants in interface AstSelect

descendants

public AstSelect descendants(AstNodeType... types)

Description copied from interface: AstSelect

Returns new selection, which contains descendants of a given types of this selection.

Specified by:

descendants in interface AstSelect

See Also:

• AstSelect.descendants(AstNodeType)

isEmpty

public boolean isEmpty()

Description copied from interface: AstSelect

Returns true if this selection contains no elements.

Specified by:

isEmpty in interface AstSelect

Returns:

true if this selection contains no elements

isNotEmpty

public boolean isNotEmpty()

Description copied from interface: AstSelect

Returns true if this selection contains elements.

Specified by:

isNotEmpty in interface AstSelect

Returns:

true if this selection contains elements

filter

public AstSelect filter(AstNodeType type)

Description copied from interface: AstSelect

Returns new selection, which contains elements of this selection that have given type.

Specified by:

filter in interface AstSelect

filter

public AstSelect filter(AstNodeType... types)

Description copied from interface: AstSelect

Returns new selection, which contains elements of this selection that have any one of the given types.

Specified by:

filter in interface AstSelect

filter

public AstSelect filter(Predicate<AstNode> predicate)

Description copied from interface: AstSelect

Returns new selection, which contains elements of this selection that satisfy a predicate.

Specified by:

filter in interface AstSelect

size

public int size()

Description copied from interface: AstSelect

Returns the number of elements in this selection.

Specified by:

size in interface AstSelect

Returns:

the number of elements in this selection

get

public AstNode get(int index)

Description copied from interface: AstSelect

Returns the element at the specified position in this selection.

Specified by:

get in interface AstSelect

Parameters:

index - index of the element to return

Returns:

the element at the specified position in this selection

iterator

public Iterator<AstNode> iterator()

Description copied from interface: AstSelect

Returns an iterator over the elements in this selection.

Specified by:

iterator in interface AstSelect

Specified by:

iterator in interface Iterable<AstNode>

Returns:

an iterator over the elements in this selection