staxtryactionfactory.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;
import java.util.List;
import java.util.ArrayList;

public class STAXTryActionFactory implements STAXActionFactory
{
    private static String fDTDInfo =
"\n" +
"<!--================= The Try / Catch Block Elements =============== -->\n" +
"<!--\n" +
"     The try element allows you to perform an action and to catch\n" +
"     exceptions that are thrown.\n" +
"-->\n" +
"<!ELEMENT try        ((%task;), catch+)>\n" +
"<!--\n" +
"     The catch element performs a task when the specified exception is\n" +
"     caught.  The var attribute specifies the name of the variable to\n" +
"     receive the data specified within the throw element.  The typevar\n" +
"     attribute specifies the name of the variable to receive the type\n" +
"     of the exception.\n" +
"\n" +
"-->\n" +
"<!ELEMENT catch      (%task;)>\n" +
"<!ATTLIST catch\n" +
"          exception  CDATA        #REQUIRED\n" +
"          var        CDATA        #IMPLIED\n" +
"          typevar    CDATA        #IMPLIED\n" +
">\n";

    public String getDTDInfo()
    {
        return fDTDInfo;
    }

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

    public STAXAction parseAction(STAX staxService, STAXJob job,
                                  org.w3c.dom.Node root) throws STAXException
    {
        STAXAction tryAction = null;
        List catchList = new ArrayList(); 

        NamedNodeMap attrs = root.getAttributes();

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

            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 (thisChild.getNodeName().equals("catch"))
                {
                    catchList.add(handleCatch(staxService, job, thisChild));
                } 
                else
                {
                    if (tryAction != null)
                    {
                        throw new STAXInvalidXMLElementCountException(
                                  thisChild.getNodeName());
                    }

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

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

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

        return new STAXTryAction(tryAction, catchList);
    }

    private STAXCatchAction handleCatch(STAX staxService, STAXJob job,
                                        Node root) throws STAXException
    {
        String exceptionName = null;
        String varName = null;
        String typeVarName = null;
        STAXAction catchAction = 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("exception"))
            {
                exceptionName = STAXUtil.parseAndCompileForPython(
                    thisAttr.getNodeValue(), errorInfo);
            }
            else if (thisAttr.getNodeName().equals("var"))
            {
                varName = thisAttr.getNodeValue();
            }
            else if (thisAttr.getNodeName().equals("typevar"))
            {
                typeVarName = 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 (catchAction != null)
                {
                    throw new STAXInvalidXMLElementCountException(
                              thisChild.getNodeName());
                }  

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

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

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

        return new STAXCatchAction(exceptionName, varName, typeVarName,
                                   catchAction);
    }
}