Package org.nineml.coffeefilter

Class ParserOptions

java.lang.Object
org.nineml.coffeegrinder.parser.ParserOptions
org.nineml.coffeefilter.ParserOptions
public class ParserOptions extends org.nineml.coffeegrinder.parser.ParserOptions
Options to the Invisible XML processor.

This object is extended by other members of the NineML family to provide additional options. It started out as a collection of public fields, but changed to a more traditional collection of getters and setters when it began to develop options that were not entirely independent.

  • Constructor Details

    • ParserOptions

      public ParserOptions()
      Create the parser options.

      The initial logger will be a DefaultLogger initialized with Logger.readSystemProperties().

    • ParserOptions

      public ParserOptions(org.nineml.logging.Logger logger)
      Create the parser options with an explicit logger.
      Parameters:
      logger - the logger.

    • ParserOptions

      public ParserOptions(ParserOptions copy)
      Create a new set of options from an existing set.
      Parameters:
      copy - the options to copy

  • Method Details

    • getIgnoreTrailingWhitespace

      public boolean getIgnoreTrailingWhitespace()
      Ignore trailing whitespace?

      If a parse fails where it would have succeeded if trailing whitespace was removed from the input, report success.

      Returns:
      true if trailing whitespace is ignored

    • setIgnoreTrailingWhitespace

      public void setIgnoreTrailingWhitespace(boolean ignore)
      Set the getIgnoreTrailingWhitespace() property.
      Parameters:
      ignore - ignore trailing whitespace?

    • getTrailingNewlineOnOutput

      public boolean getTrailingNewlineOnOutput()
      Make sure the output ends with a newline?

      If this option is true, a newline will be added to the end of the output.

      Returns:
      the trailing newline setting.

    • setTrailingNewlineOnOutput

      public void setTrailingNewlineOnOutput(boolean newline)
      Set the getTrailingNewlineOnOutput() property.
      Parameters:
      newline - add a trailing newline?

    • getAllowUndefinedSymbols

      public boolean getAllowUndefinedSymbols()
      Allow undefined symbols?

      A grammar with undefined symbols isn't necessarily unusable. But Invisible XML forbids them.

      Returns:
      true if undefined symbols are allowed

    • setAllowUndefinedSymbols

      public void setAllowUndefinedSymbols(boolean allow)
      Set the getAllowUndefinedSymbols() property.

      Allowing undefined symbols implies getAllowUnproductiveSymbols() and getAllowUndefinedSymbols(). An undefined symbol is always part of an unproductive rule and avoiding errors for undefined rules often introduces undefined symbols.

      Parameters:
      allow - allow undefined symbols?

    • getAllowUnreachableSymbols

      public boolean getAllowUnreachableSymbols()
      Allow unreachable symbols?

      A grammar with unreachable symbols isn't forbidden by Invisible XML, but might still be an error.

      Returns:
      true if unreachable symbols are allowed.

    • setAllowUnreachableSymbols

      public void setAllowUnreachableSymbols(boolean allow)
      Set the getAllowUnreachableSymbols() property.
      Parameters:
      allow - allow unreachable symbols?

    • getAllowUnproductiveSymbols

      public boolean getAllowUnproductiveSymbols()
      Allow unproductive symbols?

      An unproductive symbol is one which can never produce output in a valid parse.

      Returns:
      true if unproductive rules are allowed

    • setAllowUnproductiveSymbols

      public void setAllowUnproductiveSymbols(boolean allow)
      Set the getAllowUnproductiveSymbols() property.
      Parameters:
      allow - allow unproductive rules?

    • getAllowMultipleDefinitions

      public boolean getAllowMultipleDefinitions()
      Allow multiple definitions?

      A grammar with multiply defined symbols isn't a problem for the underlying Earley parser, but it is forbidden by Invisible XML.

      Returns:
      true if multiple definitions are allowed.

    • setAllowMultipleDefinitions

      public void setAllowMultipleDefinitions(boolean allow)
      Set the getAllowMultipleDefinitions() property.
      Parameters:
      allow - allow multiple definitions?

    • getAllowEmptyAlts

      public boolean getAllowEmptyAlts()
      Allow empty string to represent an alternative?

      This is a purely stylistic option. Invisible XML allows the empty string to represent an empty alternative, S = "a" | . That defines S to be either @code{"a"} or empty, "nothing". Another way to represent an empty alternative is with an empty pair of parentheses, S = "a" | () .. That's more visually distinct and can be enforced with this option.

      Returns:
      true if the empty string can represent an alternative.

    • setAllowEmptyAlts

      public void setAllowEmptyAlts(boolean allow)
      Set the getAllowEmptyAlts() ()} property.
      Parameters:
      allow - allow empty string to represent an alternative?

    • getPrettyPrint

      public boolean getPrettyPrint()
      Attempt to pretty print the result?

      If the result is pretty printed, extra newlines and spaces for indentation will be added to the result.

      Returns:
      true if the result should be pretty printed.

    • setPrettyPrint

      public void setPrettyPrint(boolean prettPrint)
      Set the getPrettyPrint() property.
      Parameters:
      prettPrint - pretty print?

    • getShowChart

      public boolean getShowChart()
      Show the Earley chart in error results?
      Returns:
      true if the early chart should appear in error results.

    • setShowChart

      public void setShowChart(boolean show)
      Set the getShowChart() property.
      Parameters:
      show - show the chart?

    • getGraphviz

      public String getGraphviz()
      Where's the GraphViz 'dot' command?
      Returns:
      the path of the dot command.

    • setGraphviz

      public void setGraphviz(String dot)
      Set the getGraphviz() property.

      Setting the path to null disables SVG output.

      Parameters:
      dot - the path to the dot command.

    • isSuppressedState

      public boolean isSuppressedState(String state)
      Is the specified state suppressed?

      The Invisible XML processor adds state values to the root element to report conditions such as ambiguity or a prefix parse. These states can be suppressed.

      Parameters:
      state - the state
      Returns:
      true if the state is suppressed.

    • suppressState

      public void suppressState(String state)
      Suppress a state.

      The Invisible XML processor adds state values to the root element to report conditions such as ambiguity or a prefix parse. These states can be suppressed.

      Parameters:
      state - the state to suppress.

    • exposeState

      public void exposeState(String state)
      Expose a state.

      The Invisible XML processor adds state values to the root element to report conditions such as ambiguity or a prefix parse. These states can be suppressed.

      Parameters:
      state - the state to (no longer) suppress

    • getAssertValidXmlNames

      public boolean getAssertValidXmlNames()
      Raise an exception if invalid XML names are used in nonterminals that are serialized.
      Returns:
      true if invalid XML names should raise an exception

    • setAssertValidXmlNames

      public void setAssertValidXmlNames(boolean valid)
      Set the getAssertValidXmlNames() property.
      Parameters:
      valid - assert valid names?

    • getAssertValidXmlCharacters

      public boolean getAssertValidXmlCharacters()
      Raise an exception if invalid XML characters are used in text or attribute values that are serialized.
      Returns:
      true if invalid XML characters should raise an exception

    • setAssertValidXmlCharacters

      public void setAssertValidXmlCharacters(boolean valid)
      Set the getAssertValidXmlCharacters() property.
      Parameters:
      valid - assert valid characters?

    • getPedantic

      public boolean getPedantic()
      Enforce strict compliance to the Invisible XML specification.

      In pedantic mode, the processor won't allow grammar extensions, like pragmas, that are not yet officially incorporated into the specification.

      Returns:
      true if pedantic mode is enabled

    • setPedantic

      public void setPedantic(boolean pedantic)
      Set the getPedantic() property.

      In pedantic mode, the processor won't allow grammar extensions, like pragmas, that are not yet officially incorporated into the specification. Enabling pedantic mode also resets the allowed grammar hygiene rules to their defaults.

      Parameters:
      pedantic - be pedantic?

    • getShowMarks

      public boolean getShowMarks()

    • setShowMarks

      public void setShowMarks(boolean show)

    • getShowBnfNonterminals

      public boolean getShowBnfNonterminals()

    • setShowBnfNonterminals

      public void setShowBnfNonterminals(boolean show)

    • setRuleRewriter

      public void setRuleRewriter(org.nineml.coffeefilter.model.RuleRewriter rewriter)

    • getRuleRewriter

      public org.nineml.coffeefilter.model.RuleRewriter getRuleRewriter()

    • getIgnoreBOM

      public boolean getIgnoreBOM()
      If a UTF-8 input stream begins with a byte order mark (BOM), ignore it.
      Returns:
      the ignore BOM setting.

    • setIgnoreBOM

      public void setIgnoreBOM(boolean ignore)
      Set the getIgnoreBOM() property.
      Parameters:
      ignore - Ignore the BOM?

    • getStrictAmbiguity

      public boolean getStrictAmbiguity()
      If a grammar contains priority pragmas that uniquely determine the outcome of every potentially ambiguous choice, report that the grammar is ambiguous anyway.
      Returns:
      the strict ambiguity setting

    • setStrictAmbiguity

      public void setStrictAmbiguity(boolean strict)
      Set the getStrictAmbiguity() property.
      Parameters:
      strict - Strictly report ambiguity?

    • pragmaDisabled

      public boolean pragmaDisabled(String pragma)
      Is the specified pragma disabled?

      The user can selectively disable pragmas in a grammar. This method determines whether the specified pragma is disabled.

      Parameters:
      pragma - the pragma name
      Returns:
      true if the pragma is disabled.

    • disablePragma

      public void disablePragma(String pragma)
      Disable the specified pragma.

      The user can selectively ignore pragmas in a grammar. This method specifies that a particular pragma should be disabled. The token "#all" disables all pragmas.

      Parameters:
      pragma - the pragma to disable.

    • enablePragma

      public void enablePragma(String pragma)
      Disable the specified pragma.

      The user can selectively ignore pragmas in a grammar. This method specifies that a particular pragma should be enabled. The token "#all" enables all pragmas.

      Parameters:
      pragma - the state to suppress.

    • getStartSymbol

      public String getStartSymbol()
      Where should parsing start?

      Invisible XML defines the start symbol as the symbol defined by the first rule in the grammar. In practice, the parser can start with any symbol in the grammar. This option returns the start symbol, if one was specified, or null. If null is returned, the parser will use the default start symbol. An exception will be raised if the symbol named is not defined in the grammar.

      Returns:
      the start symbol, or null if none was specified

    • setStartSymbol

      public void setStartSymbol(String name)
      Set the getStartSymbol() property.

      This option allows you to specify what the "seed" symbol should be for parsing. This will result in nonconformant parser behavior if the symbol specified isn't the symbol defined by the first rule in the grammar.

      Parameters:
      name - the symbol name

    • getValidateVxml

      public boolean getValidateVxml()
      Should validate VXML grammars?
      Returns:
      true if the grammar should be validated

    • setValidateVxml

      public void setValidateVxml(boolean validate)
      Set the getValidateVxml() property.
      Parameters:
      validate - true if VXML grammars should be validated