org.apache.xalan.xsltc.compiler
Class XPathParser

java.lang.Object
  |
  +--java_cup.runtime.lr_parser
        |
        +--org.apache.xalan.xsltc.compiler.XPathParser

public class XPathParser

extends java_cup.runtime.lr_parser

CUP v0.10j generated parser.

Field Summary

org.apache.xalan.xsltc.compiler.SymbolTable	_symbolTable Reference to the symbol table.
static org.apache.xalan.xsltc.compiler.VariableRef	DummyVarRef Reference to non-existing variable.
static java.util.Vector	EmptyArgs Used by function calls with no args.

Constructor Summary

XPathParser()
Default constructor.

XPathParser(Parser parser)

XPathParser(java_cup.runtime.Scanner s)
Constructor which sets the default scanner.

Method Summary

short[][]	action_table() Access to parse-action table.
void	addError(ErrorMsg error)
org.apache.xalan.xsltc.compiler.StepPattern	createStepPattern(int axis, java.lang.Object test, java.util.Vector predicates) This method is similar to findNodeType(int, Object) except that it creates a StepPattern instead of just returning a node type.
java_cup.runtime.Symbol	do_action(int act_num, java_cup.runtime.lr_parser parser, java.util.Stack stack, int top) Invoke a user supplied parse action.
int	EOF_sym() EOF Symbol index.
int	error_sym() error Symbol index.
int	findNodeType(int axis, java.lang.Object test)
int	getLineNumber()
org.apache.xalan.xsltc.compiler.QName	getQNameIgnoreDefaultNs(java.lang.String name)
org.apache.xalan.xsltc.compiler.RelativeLocationPath	insertStep(org.apache.xalan.xsltc.compiler.Step step, org.apache.xalan.xsltc.compiler.RelativeLocationPath rlp)
boolean	isElementAxis(int axis) Returns true if the axis applies to elements only.
java_cup.runtime.Symbol	parse(java.lang.String expression, int lineNumber) Parse the expression passed to the current scanner.
short[][]	production_table() Access to production table.
short[][]	reduce_table() Access to reduce_goto table.
void	report_error(java.lang.String message, java.lang.Object info)
void	report_fatal_error(java.lang.String message, java.lang.Object info)
void	setCallsNodeset(boolean flag)
void	setHasIdCall(boolean flag)
void	setMultiDocument(boolean flag)
int	start_production() Indicates start production.
int	start_state() Indicates start state.

Methods inherited from class java_cup.runtime.lr_parser

debug_message, debug_parse, debug_reduce, debug_shift, debug_stack, done_parsing, dump_stack, getScanner, parse, scan, setScanner, syntax_error, unrecovered_syntax_error, user_init

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EmptyArgs

public static final java.util.Vector EmptyArgs

Used by function calls with no args.

DummyVarRef

public static final org.apache.xalan.xsltc.compiler.VariableRef DummyVarRef

Reference to non-existing variable.

_symbolTable

public org.apache.xalan.xsltc.compiler.SymbolTable _symbolTable

Reference to the symbol table.

Constructor Detail

XPathParser

public XPathParser()

Default constructor.

XPathParser

public XPathParser(java_cup.runtime.Scanner s)

Constructor which sets the default scanner.

XPathParser

public XPathParser(Parser parser)

Method Detail

production_table

public short[][] production_table()

Access to production table.

Overrides:

production_table in class java_cup.runtime.lr_parser

action_table

public short[][] action_table()

Access to parse-action table.

Overrides:

action_table in class java_cup.runtime.lr_parser

reduce_table

public short[][] reduce_table()

Access to reduce_goto table.

Overrides:

reduce_table in class java_cup.runtime.lr_parser

do_action

public java_cup.runtime.Symbol do_action(int act_num,
                                         java_cup.runtime.lr_parser parser,
                                         java.util.Stack stack,
                                         int top)
                                  throws java.lang.Exception

Invoke a user supplied parse action.

Overrides:

do_action in class java_cup.runtime.lr_parser

start_state

public int start_state()

Indicates start state.

Overrides:

start_state in class java_cup.runtime.lr_parser

start_production

public int start_production()

Indicates start production.

Overrides:

start_production in class java_cup.runtime.lr_parser

EOF_sym

public int EOF_sym()

EOF Symbol index.

Overrides:

EOF_sym in class java_cup.runtime.lr_parser

error_sym

public int error_sym()

error Symbol index.

Overrides:

error_sym in class java_cup.runtime.lr_parser

getLineNumber

public int getLineNumber()

getQNameIgnoreDefaultNs

public org.apache.xalan.xsltc.compiler.QName getQNameIgnoreDefaultNs(java.lang.String name)

setMultiDocument

public void setMultiDocument(boolean flag)

setCallsNodeset

public void setCallsNodeset(boolean flag)

setHasIdCall

public void setHasIdCall(boolean flag)

createStepPattern

public org.apache.xalan.xsltc.compiler.StepPattern createStepPattern(int axis,
                                                                     java.lang.Object test,
                                                                     java.util.Vector predicates)

This method is similar to findNodeType(int, Object) except that it creates a StepPattern instead of just returning a node type. It also differs in the way it handles "{uri}:*" and "{uri}:@*". The last two patterns are expanded as "*[namespace-uri() = 'uri']" and "@*[namespace-uri() = 'uri']", respectively. This expansion considerably simplifies the grouping of patterns in the Mode class. For this expansion to be correct, the priority of the pattern/template must be set to -0.25 (when no other predicates are present).

findNodeType

public int findNodeType(int axis,
                        java.lang.Object test)

parse

public java_cup.runtime.Symbol parse(java.lang.String expression,
                                     int lineNumber)
                              throws java.lang.Exception

Parse the expression passed to the current scanner. If this expression contains references to local variables and it will be compiled in an external module (not in the main class) request the current template to create a new variable stack frame.

Parameters:

lineNumber - Line where the current expression is defined.

external - Set to true if this expression is compiled in a separate module.

addError

public final void addError(ErrorMsg error)

report_error

public void report_error(java.lang.String message,
                         java.lang.Object info)

Overrides:

report_error in class java_cup.runtime.lr_parser

report_fatal_error

public void report_fatal_error(java.lang.String message,
                               java.lang.Object info)

Overrides:

report_fatal_error in class java_cup.runtime.lr_parser

insertStep

public org.apache.xalan.xsltc.compiler.RelativeLocationPath insertStep(org.apache.xalan.xsltc.compiler.Step step,
                                                                       org.apache.xalan.xsltc.compiler.RelativeLocationPath rlp)

isElementAxis

public boolean isElementAxis(int axis)

Returns true if the axis applies to elements only. The axes child, attribute, namespace, descendant result in non-empty nodesets only if the context node is of type element.