staxiterateactionfactory.java

Software Testing Automation Framework (STAF)的开发代码

/*****************************************************************************/
/* Software Testing Automation Framework (STAF)                              */
/* (C) Copyright IBM Corp. 2002                                              */
/*                                                                           */
/* This software is licensed under the Common Public License (CPL) V1.0.     */
/*****************************************************************************/

package com.ibm.staf.service.stax;
import org.w3c.dom.Node;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.NodeList;

public class STAXIterateActionFactory implements STAXActionFactory
{
    private static String fDTDInfo =
"\n" +
"<!--================= The Iterate Element ========================= -->\n" +
"<!--\n" +
"     The iterate element iterates through a list of items, performing\n" +
"     its contained task while substituting each item in the list.\n" +
"     The iterated tasks are performed in sequence.\n" +
"-->\n" +
"<!ELEMENT iterate  (%task;)>\n" +
"<!-- var      is the name of the variable which will contain the\n" + 
"              current item in the list or tuple being iterated.\n" + 
"              It is a literal.\n" +
"     in       is the list or tuple to be iterated.  It is evaluated\n" +
"              via Python and must evaluate to be a list or tuple.\n" + 
"     indexvar is the name of a variable which will contain the index of\n" +
"              the current item in the list or tuple being iterated.\n" +
"              It is a literal.  The value for the first index is 0.\n" +
"-->\n" +
"<!ATTLIST iterate\n" +
"          var        CDATA    #REQUIRED\n" +
"          in         CDATA    #REQUIRED\n" +
"          indexvar   CDATA    #IMPLIED\n" +
">\n";

    public String getDTDInfo()
    {
        return fDTDInfo;
    }

    public String getDTDTaskName()
    {
        return "iterate";
    }

    public STAXAction parseAction(STAX staxService, STAXJob job,
                                  org.w3c.dom.Node root) throws STAXException
    {
        String itemvar  = new String();
        String in       = new String();
        String indexvar = new String();
        STAXAction iterateAction = null;

        NamedNodeMap attrs = root.getAttributes();

        for (int i = 0; i < attrs.getLength(); ++i)
        {
            Node thisAttr = attrs.item(i);

            String errorInfo = "\n  Element: " + root.getNodeName() +
                               "  Attribute: " + thisAttr.getNodeName();

            if (thisAttr.getNodeName().equals("var"))
            {
                itemvar = thisAttr.getNodeValue();
            }
            else if (thisAttr.getNodeName().equals("in"))
            {
                in = STAXUtil.parseAndCompileForPython(
                    thisAttr.getNodeValue(), errorInfo);
            }
            else if (thisAttr.getNodeName().equals("indexvar"))
            {
                indexvar = thisAttr.getNodeValue();
            } 
            else
            {
                throw new STAXInvalidXMLAttributeException(
                    root.getNodeName() + ": " + thisAttr.getNodeName());
            }
        }

        NodeList children = root.getChildNodes();

        for (int i = 0; i < children.getLength(); ++i)
        {
            Node thisChild = children.item(i);

            if (thisChild.getNodeType() == Node.COMMENT_NODE)
            {
                /* Do nothing */
            }
            else if (thisChild.getNodeType() == Node.ELEMENT_NODE)
            {
                if (iterateAction != null)
                {
                    throw new STAXInvalidXMLElementCountException(
                              thisChild.getNodeName());
                }

                STAXActionFactory factory = 
                    staxService.getActionFactory(thisChild.getNodeName());

                if (factory == null)
                {
                    throw new STAXInvalidXMLElementException(
                              thisChild.getNodeName());
                }

                iterateAction = factory.parseAction(staxService, job, thisChild);
            }
            else
            {
                throw new STAXInvalidXMLNodeTypeException(
                          Integer.toString(thisChild.getNodeType()));
            }
        }

        return new STAXIterateAction(itemvar, in, indexvar, iterateAction);
    }
}