Package org.mozilla.javascript.ast

Class XmlElemRef

java.lang.Object
org.mozilla.javascript.Node
org.mozilla.javascript.ast.AstNode
org.mozilla.javascript.ast.XmlRef
org.mozilla.javascript.ast.XmlElemRef
All Implemented Interfaces:
Comparable<AstNode>, Iterable<Node>
public class XmlElemRef extends XmlRef
AST node for an E4X XML [expr] member-ref expression. The node type is Token.REF_MEMBER.

Syntax: 

 @opt ns:: opt [ expr ]
Examples include ns::[expr], @ns::[expr], @[expr], *::[expr] and @*::[expr].

Note that the form [expr] (i.e. no namespace or attribute-qualifier) is not a legal XmlElemRef expression, since it's already used for standard JavaScript ElementGet array-indexing. Hence, an XmlElemRef node always has either the attribute-qualifier, a non-null namespace node, or both.

The node starts at the @ token, if present. Otherwise it starts at the namespace name. The node bounds extend through the closing right-bracket, or if it is missing due to a syntax error, through the end of the index expression.

  • Constructor Details

    • XmlElemRef

      public XmlElemRef()

    • XmlElemRef

      public XmlElemRef(int pos)

    • XmlElemRef

      public XmlElemRef(int pos, int len)

  • Method Details

    • getExpression

      public AstNode getExpression()
      Returns index expression: the 'expr' in @[expr] or @*::[expr].

    • setExpression

      public void setExpression(AstNode expr)
      Sets index expression, and sets its parent to this node.
      Throws:
      IllegalArgumentException - if expr is null

    • getLb

      public int getLb()
      Returns left bracket position, or -1 if missing.

    • setLb

      public void setLb(int lb)
      Sets left bracket position, or -1 if missing.

    • getRb

      public int getRb()
      Returns left bracket position, or -1 if missing.

    • setRb

      public void setRb(int rb)
      Sets right bracket position, -1 if missing.

    • setBrackets

      public void setBrackets(int lb, int rb)
      Sets both bracket positions.

    • toSource

      public String toSource(int depth)
      Description copied from class: AstNode
      Emits source code for this node. Callee is responsible for calling this function recursively on children, incrementing indent as appropriate.

      Note: if the parser was in error-recovery mode, some AST nodes may have null children that are expected to be non-null when no errors are present. In this situation, the behavior of the toSource method is undefined: toSource implementations may assume that the AST node is error-free, since it is intended to be invoked only at runtime after a successful parse.

      Specified by:
      toSource in class AstNode
      Parameters:
      depth - the current recursion depth, typically beginning at 0 when called on the root node.

    • visit

      public void visit(NodeVisitor v)
      Visits this node, then the namespace if provided, then the index expression.
      Specified by:
      visit in class AstNode
      Parameters:
      v - the object to call with this node and its children