Package org.mozilla.javascript.ast

Class XmlElemRef

  • All Implemented Interfaces:
    java.lang.Comparable<AstNode>, java.lang.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 Detail

      • XmlElemRef

        public XmlElemRef()

      • XmlElemRef

        public XmlElemRef​(int pos)

      • XmlElemRef

        public XmlElemRef​(int pos,
                  int len)

    • Method Detail

      • 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:
        java.lang.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 java.lang.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