Class UnparsedTextLines

All Implemented Interfaces:
Serializable, SourceLocator, LocationProvider, SaxonLocator, CallableExpression, InstructionInfo, Locator

public class UnparsedTextLines extends UnparsedText implements CallableExpression
See Also:
  • Constructor Details

    • UnparsedTextLines

      public UnparsedTextLines()
  • Method Details

    • evaluateItem

      public Item evaluateItem(XPathContext context) throws XPathException
      This method handles evaluation of the function: it returns a StringValue in the case of unparsed-text(), or a BooleanValue in the case of unparsed-text-available(). In the case of unparsed-text-lines() this shouldn't be called, but we deal with it anyway.
      Overrides:
      evaluateItem in class UnparsedText
      Parameters:
      context - The context in which the expression is to be evaluated
      Returns:
      the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
      Throws:
      XPathException - if any dynamic error occurs evaluating the expression
    • call

      public SequenceIterator call(SequenceIterator[] arguments, XPathContext context) throws XPathException
      Evaluate the expression
      Specified by:
      call in interface CallableExpression
      Overrides:
      call in class UnparsedText
      Parameters:
      arguments - the values of the arguments, supplied as SequenceIterators
      context - the dynamic evaluation context
      Returns:
      the result of the evaluation, in the form of a SequenceIterator
      Throws:
      XPathException - if a dynamic error occurs during the evaluation of the expression
    • iterate

      public SequenceIterator iterate(XPathContext context) throws XPathException
      Return an Iterator to iterate over the values of a sequence. The value of every expression can be regarded as a sequence, so this method is supported for all expressions. This default implementation handles iteration for expressions that return singleton values: for non-singleton expressions, the subclass must provide its own implementation.
      Overrides:
      iterate in class Expression
      Parameters:
      context - supplies the context for evaluation
      Returns:
      a SequenceIterator that can be used to iterate over the result of the expression
      Throws:
      XPathException - if any dynamic error occurs evaluating the expression
    • readFile

      public CharSequence readFile(String href, String baseURI, String encoding, XPathContext context) throws XPathException
      Supporting routine to load one external file given a URI (href) and a baseURI
      Overrides:
      readFile in class UnparsedText
      Throws:
      XPathException
    • getAbsoluteURI

      public static URI getAbsoluteURI(String href, String baseURI) throws XPathException
      Throws:
      XPathException
    • handleIOError

      public static XPathException handleIOError(URI absoluteURI, IOException ioErr)
    • readFile

      public static CharSequence readFile(NameChecker checker, Reader reader) throws IOException, XPathException
      Read the contents of an unparsed text file
      Parameters:
      checker - NameChecker for checking whether characters are valid XML characters
      reader - Reader to be used for reading the file
      Returns:
      a CharSequence representing the contents of the file
      Throws:
      IOException - if a failure occurs reading the file
      XPathException - if the file contains illegal characters
    • main

      public static void main(String[] args) throws Exception
      Throws:
      Exception