package com.jclark.xsl.tr;

import com.jclark.xsl.om.*;
import com.jclark.xsl.expr.StringExpr;

class AttributeAction implements Action {
  private StringExpr nameExpr;
  private StringExpr namespaceExpr;
  private NamespacePrefixMap nsMap;
  private Action content;

  AttributeAction(StringExpr nameExpr, StringExpr namespaceExpr,
		  NamespacePrefixMap nsMap, Action content) {
    this.nameExpr = nameExpr;
    this.namespaceExpr = namespaceExpr;
    this.nsMap = nsMap;
    this.content = content;
  }

  public void invoke(ProcessContext context, Node sourceNode, Result result) throws XSLException {
    String qname = nameExpr.eval(sourceNode, context);
    Name name;
    if (namespaceExpr != null) {
      String ns = namespaceExpr.eval(sourceNode, context);
      if (ns.length() == 0)
	name = nsMap.getNameTable().createName(qname.substring(qname.indexOf(';') + 1));
      else
	name = nsMap.getNameTable().createName(qname, ns);
    }
    else
      name = nsMap.expandAttributeName(qname, sourceNode);
    StringResult s = new StringResult(result);
    content.invoke(context, sourceNode, s);
    result.attribute(name, s.toString());
  }
}