Evaluate the compiled XPath expression in the specified context and - * return the result as the specified type.
- * - *See "Evaluation of XPath Expressions" section of JAXP 1.3 spec - * for context item evaluation, - * variable, function and QName resolution and return type conversion.
- * - *If returnType is not one of the types defined
- * in {@link XPathConstants},
- * then an IllegalArgumentException is thrown.
If a null value is provided for
- * item, an empty document will be used for the
- * context.
- * If returnType is null, then a
- * NullPointerException is thrown.
Object that is the result of evaluating the
- * expression and converting the result to
- * returnType.
- *
- * @throws XPathExpressionException If the expression cannot be evaluated.
- * @throws IllegalArgumentException If returnType is not one
- * of the types defined in {@link XPathConstants}.
- * @throws NullPointerException If returnType is
- * null.
- */
+ @Override
public Object evaluate(Object item, QName returnType)
throws XPathExpressionException {
- //Validating parameters to enforce constraints defined by JAXP spec
- if ( returnType == null ) {
- //Throwing NullPointerException as defined in spec
- String fmsg = XSLMessages.createXPATHMessage(
- XPATHErrorResources.ER_ARG_CANNOT_BE_NULL,
- new Object[] {"returnType"} );
- throw new NullPointerException( fmsg );
- }
- // Checking if requested returnType is supported. returnType need to be
- // defined in XPathConstants
- if ( !isSupported ( returnType ) ) {
- String fmsg = XSLMessages.createXPATHMessage(
- XPATHErrorResources.ER_UNSUPPORTED_RETURN_TYPE,
- new Object[] { returnType.toString() } );
- throw new IllegalArgumentException ( fmsg );
- }
+ isSupported(returnType);
try {
- return eval( item, returnType);
- } catch ( java.lang.NullPointerException npe ) {
+ return eval(item, returnType);
+ } catch (java.lang.NullPointerException npe) {
// If VariableResolver returns null Or if we get
// NullPointerException at this stage for some other reason
// then we have to reurn XPathException
- throw new XPathExpressionException ( npe );
- } catch ( javax.xml.transform.TransformerException te ) {
+ throw new XPathExpressionException (npe);
+ } catch (javax.xml.transform.TransformerException te) {
Throwable nestedException = te.getException();
- if ( nestedException instanceof javax.xml.xpath.XPathFunctionException ) {
+ if (nestedException instanceof javax.xml.xpath.XPathFunctionException) {
throw (javax.xml.xpath.XPathFunctionException)nestedException;
} else {
// For any other exceptions we need to throw
- // XPathExpressionException ( as per spec )
- throw new XPathExpressionException( te);
+ // XPathExpressionException (as per spec)
+ throw new XPathExpressionException(te);
}
}
}
- /**
- * Evaluate the compiled XPath expression in the specified context and
- * return the result as a String.
This method calls {@link #evaluate(Object item, QName returnType)}
- * with a returnType of
- * {@link XPathConstants#STRING}.
See "Evaluation of XPath Expressions" section of JAXP 1.3 spec - * for context item evaluation, - * variable, function and QName resolution and return type conversion.
- * - *If a null value is provided for
- * item, an empty document will be used for the
- * context.
- *
- * @param item The starting context (node or node list, for example).
- *
- * @return The String that is the result of evaluating the
- * expression and converting the result to a
- * String.
- *
- * @throws XPathExpressionException If the expression cannot be evaluated.
- */
+ @Override
public String evaluate(Object item)
throws XPathExpressionException {
- return (String)this.evaluate( item, XPathConstants.STRING );
+ return (String)this.evaluate(item, XPathConstants.STRING);
}
-
-
- static DocumentBuilderFactory dbf = null;
- static DocumentBuilder db = null;
- static Document d = null;
-
- /**
- *
Evaluate the compiled XPath expression in the context of the
- * specified InputSource and return the result as the
- * specified type.
This method builds a data model for the {@link InputSource} and calls - * {@link #evaluate(Object item, QName returnType)} on the resulting - * document object.
- * - *See "Evaluation of XPath Expressions" section of JAXP 1.3 spec - * for context item evaluation, - * variable, function and QName resolution and return type conversion.
- * - *If returnType is not one of the types defined in
- * {@link XPathConstants},
- * then an IllegalArgumentException is thrown.
If source or returnType is null,
- * then a NullPointerException is thrown.
InputSource of the document to evaluate
- * over.
- * @param returnType The desired return type.
- *
- * @return The Object that is the result of evaluating the
- * expression and converting the result to
- * returnType.
- *
- * @throws XPathExpressionException If the expression cannot be evaluated.
- * @throws IllegalArgumentException If returnType is not one
- * of the types defined in {@link XPathConstants}.
- * @throws NullPointerException If source or
- * returnType is null.
- */
+ @Override
public Object evaluate(InputSource source, QName returnType)
throws XPathExpressionException {
- if ( ( source == null ) || ( returnType == null ) ) {
- String fmsg = XSLMessages.createXPATHMessage(
- XPATHErrorResources.ER_SOURCE_RETURN_TYPE_CANNOT_BE_NULL,
- null );
- throw new NullPointerException ( fmsg );
- }
- // Checking if requested returnType is supported. returnType need to be
- // defined in XPathConstants
- if ( !isSupported ( returnType ) ) {
- String fmsg = XSLMessages.createXPATHMessage(
- XPATHErrorResources.ER_UNSUPPORTED_RETURN_TYPE,
- new Object[] { returnType.toString() } );
- throw new IllegalArgumentException ( fmsg );
- }
+ isSupported (returnType);
try {
- if ( dbf == null ) {
- dbf = FactoryImpl.getDOMFactory(useServicesMechanism);
- dbf.setNamespaceAware( true );
- dbf.setValidating( false );
- }
- db = dbf.newDocumentBuilder();
- Document document = db.parse( source );
- return eval( document, returnType );
- } catch ( Exception e ) {
- throw new XPathExpressionException ( e );
+ Document document = getDocument(source);
+ return eval(document, returnType);
+ } catch (TransformerException e) {
+ throw new XPathExpressionException(e);
}
}
- /**
- * Evaluate the compiled XPath expression in the context of the specified InputSource and return the result as a
- * String.
This method calls {@link #evaluate(InputSource source, QName returnType)} with a returnType of
- * {@link XPathConstants#STRING}.
See "Evaluation of XPath Expressions" section of JAXP 1.3 spec - * for context item evaluation, - * variable, function and QName resolution and return type conversion.
- * - *If source is null, then a NullPointerException is thrown.
InputSource of the document to evaluate over.
- *
- * @return The String that is the result of evaluating the expression and converting the result to a
- * String.
- *
- * @throws XPathExpressionException If the expression cannot be evaluated.
- * @throws NullPointerException If source is null.
- */
+ @Override
public String evaluate(InputSource source)
throws XPathExpressionException {
- return (String)this.evaluate( source, XPathConstants.STRING );
+ return (String)this.evaluate(source, XPathConstants.STRING);
}
- private boolean isSupported( QName returnType ) {
- // XPathConstants.STRING
- if ( ( returnType.equals( XPathConstants.STRING ) ) ||
- ( returnType.equals( XPathConstants.NUMBER ) ) ||
- ( returnType.equals( XPathConstants.BOOLEAN ) ) ||
- ( returnType.equals( XPathConstants.NODE ) ) ||
- ( returnType.equals( XPathConstants.NODESET ) ) ) {
+ @Override
+ public