File: NodeSetFunction.java

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package com.jclark.xsl.expr;

import com.jclark.xsl.om.*;

class NodeSetFunction extends Function1 {
  ConvertibleExpr makeCallExpr(ConvertibleExpr e) {
    final VariantExpr ve = e.makeVariantExpr();
    return new ConvertibleNodeSetExpr() {
      public NodeIterator eval(Node node, ExprContext context)
	throws XSLException {
	Variant v = ve.eval(node, context);
	Node nd = context.getTree(v);
	if (nd != null)
	  return new SingleNodeIterator(nd);
	return v.convertToNodeSet();
      }
    };
  }
}