Class: TreeHaver::Backends::Java::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/tree_haver/backends/java.rb

Overview

Wrapper for java-tree-sitter Node

See Also:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(impl) ⇒ Node

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Node.



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# File 'lib/tree_haver/backends/java.rb', line 618

def initialize(impl)
  @impl = impl
end

Instance Attribute Details

#impl ⇒ Object (readonly)

Returns the value of attribute impl.



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# File 'lib/tree_haver/backends/java.rb', line 615

def impl
  @impl
end

Instance Method Details

#child(index) ⇒ Node?

Get a child by index

Parameters:

  • index (Integer) —

    the child index

Returns:

  • (Node, nil) —

    the child node or nil if index out of bounds



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# File 'lib/tree_haver/backends/java.rb', line 640

def child(index)
  # jtreesitter 0.26.0: getChild returns Optional<Node> or throws IndexOutOfBoundsException
  result = @impl.getChild(index)
  return unless result.respond_to?(:isPresent) ? result.isPresent : result
  java_node = result.respond_to?(:get) ? result.get : result
  Node.new(java_node)
rescue ::Java::JavaLang::IndexOutOfBoundsException
  nil
end

#child_by_field_name(name) ⇒ Node?

Get a child by field name

Parameters:

  • name (String) —

    the field name

Returns:

  • (Node, nil) —

    the child node or nil if not found



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# File 'lib/tree_haver/backends/java.rb', line 654

def child_by_field_name(name)
  # jtreesitter 0.26.0: getChildByFieldName returns Optional<Node>
  result = @impl.getChildByFieldName(name)
  return unless result.respond_to?(:isPresent) ? result.isPresent : result
  java_node = result.respond_to?(:get) ? result.get : result
  Node.new(java_node)
end

#child_count ⇒ Integer

Get the number of children

Returns:

  • (Integer) —

    child count



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# File 'lib/tree_haver/backends/java.rb', line 632

def child_count
  @impl.childCount
end

#each {|Node| ... } ⇒ void

This method returns an undefined value.

Iterate over children

Yields:

  • (Node) —

    each child node



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# File 'lib/tree_haver/backends/java.rb', line 666

def each
  return enum_for(:each) unless block_given?
  child_count.times do |i|
    yield child(i)
  end
end

#end_byte ⇒ Integer

Get the end byte position

Returns:

  • (Integer) —

    end byte



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# File 'lib/tree_haver/backends/java.rb', line 683

def end_byte
  @impl.endByte
end

#end_point ⇒ Hash

Get the end point (row, column)

Returns:

  • (Hash) —

    with :row and :column keys



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# File 'lib/tree_haver/backends/java.rb', line 698

def end_point
  pt = @impl.endPoint
  {row: pt.row, column: pt.column}
end

#has_error? ⇒ Boolean

Check if this node has an error

Returns:

  • (Boolean) —

    true if the node or any descendant has an error



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# File 'lib/tree_haver/backends/java.rb', line 706

def has_error?
  @impl.hasError
end

#missing? ⇒ Boolean

Check if this node is missing

Returns:

  • (Boolean) —

    true if this is a MISSING node



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# File 'lib/tree_haver/backends/java.rb', line 713

def missing?
  @impl.isMissing
end

#named? ⇒ Boolean

Check if this is a named node

Returns:

  • (Boolean) —

    true if this is a named node



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# File 'lib/tree_haver/backends/java.rb', line 720

def named?
  @impl.isNamed
end

#next_sibling ⇒ Node?

Get the next sibling node

Returns:

  • (Node, nil) —

    the next sibling or nil if none



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# File 'lib/tree_haver/backends/java.rb', line 738

def next_sibling
  # jtreesitter 0.26.0: getNextSibling returns Optional<Node>
  result = @impl.getNextSibling
  return unless result.respond_to?(:isPresent) ? result.isPresent : result
  java_node = result.respond_to?(:get) ? result.get : result
  Node.new(java_node)
end

#parent ⇒ Node?

Get the parent node

Returns:

  • (Node, nil) —

    the parent node or nil if this is the root



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# File 'lib/tree_haver/backends/java.rb', line 727

def parent
  # jtreesitter 0.26.0: getParent returns Optional<Node>
  result = @impl.getParent
  return unless result.respond_to?(:isPresent) ? result.isPresent : result
  java_node = result.respond_to?(:get) ? result.get : result
  Node.new(java_node)
end

#prev_sibling ⇒ Node?

Get the previous sibling node

Returns:

  • (Node, nil) —

    the previous sibling or nil if none



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# File 'lib/tree_haver/backends/java.rb', line 749

def prev_sibling
  # jtreesitter 0.26.0: getPrevSibling returns Optional<Node>
  result = @impl.getPrevSibling
  return unless result.respond_to?(:isPresent) ? result.isPresent : result
  java_node = result.respond_to?(:get) ? result.get : result
  Node.new(java_node)
end

#start_byte ⇒ Integer

Get the start byte position

Returns:

  • (Integer) —

    start byte



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# File 'lib/tree_haver/backends/java.rb', line 676

def start_byte
  @impl.startByte
end

#start_point ⇒ Hash

Get the start point (row, column)

Returns:

  • (Hash) —

    with :row and :column keys



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# File 'lib/tree_haver/backends/java.rb', line 690

def start_point
  pt = @impl.startPoint
  {row: pt.row, column: pt.column}
end

#text ⇒ String

Get the text of this node

Returns:

  • (String) —

    the source text



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# File 'lib/tree_haver/backends/java.rb', line 760

def text
  @impl.text.to_s
end

#type ⇒ String

Get the type of this node

Returns:

  • (String) —

    the node type



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# File 'lib/tree_haver/backends/java.rb', line 625

def type
  @impl.type
end