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  1. JDK
  2. JDK-4995204

XPathExpression.evaluate(item,returnType) should throw XPathExpressionException

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3
    • Resolution: Duplicate
    • Affects Version/s: 5.0
    • Fix Version/s: None
    • Component/s: xml
    • Labels:

      Description

      XPathExpression.evaluate(java.lang.Object item,QName returnType)should throw XPathExpressionException when item is null and expression refers to the context

      According to spec :
      A null value for item indicates that the expression should be evaluated without a context . In the absence of a context item, simple expressions, such as "1+1", can be evaluated . Any expression that refers to the context will throw an XPathExpressionException

      ------------------------------------
      java -version
      java version "1.5.0-beta2"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b38)
      Java HotSpot(TM) Client VM (build 1.5.0-beta2-b38, mixed mode)

      javac Test12.java
      java Test12
      checkXPathExpression02() : failed - expected XPathExpressionException not thrown ::
      checkXPathExpression14() : failed - expected XPathExpressionException not thrown ::

      ------------------------------------
      Testcase - Test12.java
      ***********************
      -------------------------------------------------------------------------------
      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 javax.xml.namespace.QName;

      import org.w3c.dom.Document;

      import org.xml.sax.InputSource;




      public class Test12 {

         Document document1 = null;
         
         Test12 () {}
          
          // main()
          public static void main(String[] argv) {
              Test12 xpathExpression01 = new Test12();
              xpathExpression01.checkXPathExpression02();
              xpathExpression01.checkXPathExpression14();
          }// end main()
          
          
           // test for evaluate(java.lang.Object item,QName returnType)throws XPathExpressionException
          // item is null , A null value for item indicates that the expression should be evaluated without a context.
          // In the absence of a context item, simple expressions, such as "1+1", can be evaluated.
          // Any expression that refers to the context will throw an XPathExpressionException
          private void checkXPathExpression02() {
           try{
           XPathFactory xpathFactory = XPathFactory.newInstance();
           if( xpathFactory instanceof XPathFactory ){
           XPath xpath = xpathFactory.newXPath();
      if ( xpath instanceof XPath ){
      String expression = "/widgets/widget[@name='a']/@quantity" ;
      XPathExpression xpathExpression = xpath.compile(expression);
      String quantity = (String)xpathExpression.evaluate(document1, XPathConstants.STRING);
      System.out.println("checkXPathExpression02() : failed - expected XPathExpressionException not thrown :"+quantity+":");
      }
           else{
           System.out.println("checkXPathExpression02() failed - xpath not instance of XPath");
           }
           }else{
           System.out.println(" checkXPathExpression02() failed - creating instance of XPathFactory ");
           }
           }catch(NullPointerException npe ){
           System.out.println(" checkXPathExpression02() - failed , NPE thrown ");
           }catch(XPathFactoryConfigurationException xpfce ){
           System.out.println(" checkXPathExpression02() - failed , Default object model not available ");
           }catch(XPathExpressionException xpee ){
           System.out.println(" checkXPathExpression02() - passed , expected XPathExpressionException thrown ");
           }catch(Exception e){
           System.out.println(" Exception thrown - checkXPathExpression02() failed ");
           }
          }
         
          
          // test for evaluate(java.lang.Object item)throws XPathExpressionException
          // when returnType is left off of the XPath.evaluate method, all expressions are evaluated to a String value.
          // item is null , A null value for item indicates that the expression should be evaluated without a context.
          // In the absence of a context item, simple expressions, such as "1+1", can be evaluated.
          // Any expression that refers to the context will throw an XPathExpressionException
          private void checkXPathExpression14() {
           try{
           XPathFactory xpathFactory = XPathFactory.newInstance();
           if( xpathFactory instanceof XPathFactory ){
           XPath xpath = xpathFactory.newXPath();
      if ( xpath instanceof XPath ){
      String expression = "/widgets/widget[@name='a']/@quantity" ;
      XPathExpression xpathExpression = xpath.compile(expression);
      String quantity = (String)xpathExpression.evaluate(document1 );
      System.out.println("checkXPathExpression14() : failed - expected XPathExpressionException not thrown :"+quantity+":");
      }
           else{
           System.out.println("checkXPathExpression14() failed - xpath not instance of XPath");
           }
           }else{
           System.out.println(" checkXPathExpression14() failed - creating instance of XPathFactory ");
           }
           }catch(NullPointerException npe ){
           System.out.println(" checkXPathExpression14() - failed , NPE thrown ");
           }catch(XPathFactoryConfigurationException xpfce ){
           System.out.println(" checkXPathExpression14() - failed , Default object model not available ");
           }catch(XPathExpressionException xpee ){
           System.out.println(" checkXPathExpression14() - passed , expected XPathExpressionException thrown ");
           }catch(Exception e){
           System.out.println(" Exception thrown - checkXPathExpression14() failed ");
           }
          }
          
      }

      -------------------------------------------------------------------------------

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