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java.lang.Object | +--org.apache.xpath.jaxp.XPathExpressionImpl
The XPathExpression interface encapsulates a (compiled) XPath expression.
| Method Summary | |
java.lang.Object |
eval(java.lang.Object item,
QName returnType)
|
java.lang.String |
evaluate(InputSource source)
Evaluate the compiled XPath expression in the context of the specified InputSource and return the result as a
String. |
java.lang.Object |
evaluate(InputSource source,
QName returnType)
Evaluate the compiled XPath expression in the context of the specified InputSource and return the result as the
specified type. |
java.lang.String |
evaluate(java.lang.Object item)
Evaluate the compiled XPath expression in the specified context and return the result as a String. |
java.lang.Object |
evaluate(java.lang.Object item,
QName returnType)
Evaluate the compiled XPath expression in the specified context and return the result as the specified type. |
void |
setXPath(XPath xpath)
|
| Methods inherited from class java.lang.Object |
equals,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
| Method Detail |
public void setXPath(XPath xpath)
public java.lang.Object eval(java.lang.Object item,
QName returnType)
throws TransformerException
public java.lang.Object evaluate(java.lang.Object item,
QName returnType)
throws XPathExpressionException
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 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.
item - The starting context (node or node list, for example).returnType - The desired return type.Object that is the result of evaluating the
expression and converting the result to
returnType.returnType is not one
of the types defined in XPathConstants.returnType is
null.
public java.lang.String evaluate(java.lang.Object item)
throws XPathExpressionException
Evaluate the compiled XPath expression in the specified context and
return the result as a String.
This method calls evaluate(Object item, QName returnType)
with a returnType of
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.
item - The starting context (node or node list, for example).String that is the result of evaluating the
expression and converting the result to a
String.
public java.lang.Object evaluate(InputSource source,
QName returnType)
throws XPathExpressionException
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 InputSource and calls
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
XPathConstants,
then an IllegalArgumentException is thrown.
If source or returnType is null,
then a NullPointerException is thrown.
source - The InputSource of the document to evaluate
over.returnType - The desired return type.Object that is the result of evaluating the
expression and converting the result to
returnType.returnType is not one
of the types defined in XPathConstants.source or
returnType is null.
public java.lang.String evaluate(InputSource source)
throws XPathExpressionException
Evaluate the compiled XPath expression in the context of the specified InputSource and return the result as a
String.
This method calls evaluate(InputSource source, QName returnType) with a returnType of
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.
source - The InputSource of the document to evaluate over.String that is the result of evaluating the expression and converting the result to a
String.source is null.
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