Class Location

java.lang.Object
net.sf.saxon.trace.Location

public class Location extends Object
This class holds constants identifying different kinds of location in a source stylesheet or query. These constants are used in the getConstructType() method of class InstructionInfo. Some of these locations represent points where the dynamic context changes, and they are therefore recorded as such on the context stack. Some of the locations represent points in the evaluation of a stylesheet (or query or XPath expression) that are notified to the trace listener. Some fulfil both roles.

Any constant used in StandardNames can be used as a Location. Such names are generally used to identify XSLT instructions. They are also used for equivalent constructs in XQuery, for example XSL_ELEMENT is used for a computed element constructor in XQuery. The constants in StandardNames are all in the range 0-1023, so constants defined in this class are outside this range.

The constants in this file are annotated with Q to indicate they can appear in XQuery trace output, T to indicate they can appear in XSLT trace output, and/or C to indicate that they can appear on the dynamic context stack.

  • Field Details

    • CONTROLLER

      public static final int CONTROLLER
      The outer system environment, identified as the caller of a user query or stylesheet. Usage:C
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    • EXTENSION_INSTRUCTION

      public static final int EXTENSION_INSTRUCTION
      An XSLT instruction. The name of the instruction (which may be an extension instruction) can be obtained using the fingerprint property. Usage:T
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    • LITERAL_RESULT_ELEMENT

      public static final int LITERAL_RESULT_ELEMENT
      An XSLT literal result element, or an XQuery direct element constructor. Usage:QT
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    • LITERAL_RESULT_ATTRIBUTE

      public static final int LITERAL_RESULT_ATTRIBUTE
      An attribute of an XSLT literal result element or of an XQuery direct element constructor. Usage: QT
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    • FUNCTION_CALL

      public static final int FUNCTION_CALL
      An XPath function call to a user-defined function. The "expression" property references the actual expression, of class ComputedExpression. The "target" property references the function being called, of class UserFunction. Usage: QTC
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    • BUILT_IN_TEMPLATE

      public static final int BUILT_IN_TEMPLATE
      An XSLT built-in template rule. Usage: TC
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    • XPATH_IN_XSLT

      public static final int XPATH_IN_XSLT
      Entry point to a top-level XPath expression within an XSLT stylesheet. Usage: TC
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    • FOR_EXPRESSION

      public static final int FOR_EXPRESSION
      An XPath or XQuery "for" clause. Usage: Q
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    • LET_EXPRESSION

      public static final int LET_EXPRESSION
      An XQuery "let" clause, or an XSLT local variable (which compiles into a LET clause). Usage: Q,T
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    • RETURN_EXPRESSION

      public static final int RETURN_EXPRESSION
      An XPath or XQuery "return" clause. Usage: Q
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    • IF_EXPRESSION

      public static final int IF_EXPRESSION
      An XPath or XQuery "if" expression. Usage: Q
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    • THEN_EXPRESSION

      public static final int THEN_EXPRESSION
      An XPath or XQuery "then" clause. Usage: Q
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    • ELSE_EXPRESSION

      public static final int ELSE_EXPRESSION
      An XPath or XQuery "else" clause. Usage: Q
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    • WHERE_CLAUSE

      public static final int WHERE_CLAUSE
      A WHERE clause in a FLWOR expression. Usage: Q
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    • ORDER_BY_CLAUSE

      public static final int ORDER_BY_CLAUSE
      An order-by clause in a FLWOR expression. Usage: Q
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    • TYPESWITCH_EXPRESSION

      public static final int TYPESWITCH_EXPRESSION
      An XPath or XQuery "typeswitch" expression. Usage: Q
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    • CASE_EXPRESSION

      public static final int CASE_EXPRESSION
      CASE clause within "typeswitch". Usage: Q
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    • DEFAULT_EXPRESSION

      public static final int DEFAULT_EXPRESSION
      DEFAULT clause within "typeswitch". Usage: Q
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    • VALIDATE_EXPRESSION

      public static final int VALIDATE_EXPRESSION
      An XPath or XQuery "validate" expression. Usage: Q
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    • FILTER_EXPRESSION

      public static final int FILTER_EXPRESSION
      An XPath or XQuery filter expression. Usage: C
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    • PATH_EXPRESSION

      public static final int PATH_EXPRESSION
      An XPath or XQuery path expression. Usage: C
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    • TRACE_CALL

      public static final int TRACE_CALL
      An explicit call of the fn:trace() function. Usage: QT
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    • SAXON_EVALUATE

      public static final int SAXON_EVALUATE
      An XPath expression constructed dynamically using saxon:evaluate (or saxon:expression). Usage: QTC
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    • SAXON_HIGHER_ORDER_EXTENSION_FUNCTION

      public static final int SAXON_HIGHER_ORDER_EXTENSION_FUNCTION
      A higher-order extension function such as saxon:sum, saxon:highest. Usage: C
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    • SAXON_SERIALIZE

      public static final int SAXON_SERIALIZE
      The saxon:serialize() extension function. Usage: C
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    • SORT_KEY

      public static final int SORT_KEY
      A sort key (or order-by key). Usage: C
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    • GROUPING_KEY

      public static final int GROUPING_KEY
      A grouping key in XSLT. Usage: C
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    • LAZY_EVALUATION

      public static final int LAZY_EVALUATION
      Lazy evaluation of an expression (this code is used to identify a context created as a saved copy of an existing context, to be stored in a Closure). Usage: C
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    • PATTERN

      public static final int PATTERN
      An XSLT Pattern. Usage: C
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    • XPATH_EXPRESSION

      public static final int XPATH_EXPRESSION
      XPath expression, otherwise unclassified. The "expression" property references the actual expression, of class ComputedExpression. Used in fallback cases only.
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    • UNCLASSIFIED

      public static final int UNCLASSIFIED
      Unclassified location. Used in fallback cases only.
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