Class AttributeValueTemplate

java.lang.Object
com.icl.saxon.expr.Expression
com.icl.saxon.expr.AttributeValueTemplate

public final class AttributeValueTemplate extends Expression
This class represents an attribute value template. Although it is not technically an expression in the sense of XSL syntax, we model it as an expression for inheritance purposes.
  • Method Details

    • make

      public static Expression make(String avt, StaticContext env) throws XPathException
      Static factory method to create an AVT from an XSL string representation
      Throws:
      XPathException
    • simplify

      public Expression simplify() throws XPathException
      Simplify an expression.
      Overrides:
      simplify in class Expression
      Returns:
      the simplified expression
      Throws:
      XPathException
    • evaluate

      public Value evaluate(Context context) throws XPathException
      Evaluate an AVT.
      Specified by:
      evaluate in class Expression
      Parameters:
      context - The context in which the AVT is to be evaluated
      Returns:
      the value of the AVT, evaluated in the current context
      Throws:
      XPathException
    • getDataType

      public int getDataType()
      Determine the data type of the expression, if possible
      Specified by:
      getDataType in class Expression
      Returns:
      Value.STRING
    • evaluateAsString

      public String evaluateAsString(Context context) throws XPathException
      Evaluate an expression as a String.
      Overrides:
      evaluateAsString in class Expression
      Parameters:
      context - The context in which the expression is to be evaluated
      Returns:
      the value of the expression, evaluated in the current context
      Throws:
      XPathException
    • getDependencies

      public int getDependencies()
      Determine which aspects of the context the expression depends on. The result is a bitwise-or'ed value composed from constants such as Context.VARIABLES and Context.CURRENT_NODE
      Specified by:
      getDependencies in class Expression
    • reduce

      public Expression reduce(int dependencies, Context context) throws XPathException
      Perform a partial evaluation of the expression, by eliminating specified dependencies on the context.
      Specified by:
      reduce in class Expression
      Parameters:
      dependencies - The dependencies to be removed
      context - The context to be used for the partial evaluation
      Returns:
      a new expression that does not have any of the specified dependencies
      Throws:
      XPathException
    • display

      public void display(int level)
      Diagnostic print of expression structure
      Specified by:
      display in class Expression