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  1. JDK
  2. JDK-4993505

XPath.evaluate(expr,docURL,retType) should throw NPE if expr or retType is null

    Details

    • Subcomponent:
    • Resolved In Build:
      b41
    • CPU:
      generic
    • OS:
      generic

      Description

      According to spec , evaluate() should throw NPE if expression or returnType is null
      XPath.evaluate(java.lang.String expression, java.net.URL documentURL)
      XPath.evaluate(java.lang.String expression, java.net.URL documentURL, QName returnType)

      ---------------------------------------------------------------------------
      java -version
      java version "1.5.0-beta2"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b37)
      Java HotSpot(TM) Client VM (build 1.5.0-beta2-b37, mixed mode)

      javac Test8.java
      java Test8
       checkXPath41() - failed : expecting NPE , but XPathExpressionException thrown
       checkXPath46() - failed : expecting NPE , but XPathExpressionException thrown
       checkXPath47() - failed : expecting NPE , but XPathExpressionException thrown

      ---------------------------------------------------------------------------
      Testcase - Test8.java & sample xml - widgets.xml attached
      *********************************************************
      ---------------------------------------------------------------------------
      <?xml version="1.0" standalone="yes"?>
      <widgets>
      <widget name="a" style="red" quantity="6"/>
      <widget name="b" style="blue"/>
      <widget name="c">
      <style>green</style>
      </widget>
      </widgets>

      ---------------------------------------------------------------------------
      // checkXPath41()
      // checkXPath46()
      // evaluate() should throw NPE when expression or returnType is null

      /*
      According to spec , evaluate() should throw NPE if expression or returnType is null
      XPath.evaluate(java.lang.String expression, java.net.URL documentURL)
      XPath.evaluate(java.lang.String expression, java.net.URL documentURL, QName returnType)
      */

      import javax.xml.xpath.XPath;
      import javax.xml.xpath.XPathFactory;
      import javax.xml.xpath.XPathConstants;
      import javax.xml.xpath.XPathExpression;
      import javax.xml.xpath.XPathFactoryConfigurationException;
      import javax.xml.xpath.XPathExpressionException;

      import java.net.URL;

      public class Test8 {
         
         URL url = null;
         Test8 () { }
         
          // main()
          public static void main(String[] argv) {
              Test8 xpath01 = new Test8();
              xpath01.init();
              xpath01.checkXPath41();
              xpath01.checkXPath46();
              xpath01.checkXPath47();
          }
          
              // initializing
          private void init(){
              try {
                  url = new URL("http://sqindia.india.sun.com/disk06/tea/sreejith/jaxp/widgets.xml");
              }catch (Exception e) {
                System.out.println(" Exception thrown in XPath01/init() - Test failed");
              }
          }


          // test for XPath.evaluate(java.lang.String expression, java.net.URL documentURL)
          // expression is null , should throw NPE
          private void checkXPath41() {
           try{
           XPathFactory xpathFactory = XPathFactory.newInstance();
           if( xpathFactory instanceof XPathFactory ){
           XPath xpath = xpathFactory.newXPath();
      if ( xpath instanceof XPath ){
      String expression = null;
      String quantity = (String) xpath.evaluate(expression, url);
      System.out.println("checkXPath41() : failed - expected NPE not thrown");

      }
           else{
           System.out.println("checkXPath41() failed - xpath not instance of XPath");
           }
           }else{
           System.out.println(" checkXPath41() failed - creating instance of XPathFactory ");
           }
           }catch(NullPointerException npe ){
           System.out.println(" checkXPath41() - passed , expected NPE thrown ");
           }catch(XPathFactoryConfigurationException xpfce ){
           System.out.println(" checkXPath41() - failed , Default object model not available ");
           }catch(XPathExpressionException xpee ){
           System.out.println(" checkXPath41() - failed : expecting NPE , but XPathExpressionException thrown ");
           }catch(Exception e){
           System.out.println(" Exception thrown - checkXPath41() failed ");
           }
          }


          // test for XPath.evaluate(java.lang.String expression, java.net.URL documentURL, QName returnType)
          // expression is null , should throw NPE
          private void checkXPath46() {
           try{
           XPathFactory xpathFactory = XPathFactory.newInstance();
           if( xpathFactory instanceof XPathFactory ){
           XPath xpath = xpathFactory.newXPath();
      if ( xpath instanceof XPath ){
      String expression = null;
      String quantity = (String) xpath.evaluate(expression, url, XPathConstants.STRING);
      System.out.println("checkXPath46() : failed - expected NPE not thrown" );

      }
           else{
           System.out.println("checkXPath46() failed - xpath not instance of XPath");
           }
           }else{
           System.out.println(" checkXPath46() failed - creating instance of XPathFactory ");
           }
           }catch(NullPointerException npe ){
           System.out.println(" checkXPath46() - passed , expected NPE thrown ");
           }catch(XPathFactoryConfigurationException xpfce ){
           System.out.println(" checkXPath46() - failed , Default object model not available ");
           }catch(XPathExpressionException xpee ){
           System.out.println(" checkXPath46() - failed : expecting NPE , but XPathExpressionException thrown ");
           }catch(Exception e){
           System.out.println(" Exception thrown - checkXPath46() failed ");
           }
          }
          
          // test for XPath.evaluate(java.lang.String expression, java.net.URL documentURL, QName returnType)
          // returnType is null , should throw NPE
          private void checkXPath47() {
           try{
          
           XPathFactory xpathFactory = XPathFactory.newInstance();
           if( xpathFactory instanceof XPathFactory ){
           XPath xpath = xpathFactory.newXPath();
      if ( xpath instanceof XPath ){
      String expression = "/widgets/widget[@name='a']/@quantity";
      String quantity = (String) xpath.evaluate(expression, url, null);
      System.out.println("checkXPath47() : failed - expected NPE not thrown" );

      }
           else{
           System.out.println("checkXPath47() failed - xpath not instance of XPath");
           }
           }else{
           System.out.println(" checkXPath47() failed - creating instance of XPathFactory ");
           }
           }catch(NullPointerException npe ){
           System.out.println(" checkXPath47() - passed , expected NPE thrown ");
           }catch(XPathFactoryConfigurationException xpfce ){
           System.out.println(" checkXPath47() - failed , Default object model not available ");
           }catch(XPathExpressionException xpee ){
           System.out.println(" checkXPath47() - failed : expecting NPE , but XPathExpressionException thrown ");
           }catch(Exception e){
           System.out.println(" Exception thrown - checkXPath47() failed ");
           }
          }
          

      }
      ---------------------------------------------------------------------------

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              • Assignee:
                rmandavasunw Ramesh Mandava (Inactive)
                Reporter:
                saksunw Sreejith Ak (Inactive)
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                  Updated:
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