org.apache.xalan.xsltc.compiler
Class Whitespace

java.lang.Object
  org.apache.xalan.xsltc.compiler.SyntaxTreeNode
      org.apache.xalan.xsltc.compiler.TopLevelElement
          org.apache.xalan.xsltc.compiler.Whitespace

All Implemented Interfaces:

Constants

final class Whitespace
extends TopLevelElement

Nested Class Summary

private static class

Whitespace.WhitespaceRule Auxillary class for encapsulating a single strip/preserve rule

Field Summary

private int	_action
private java.lang.String	_elementList
private int	_importPrecedence
static int	PRESERVE_SPACE
static int	RULE_ALL
static int	RULE_ELEMENT
static int	RULE_NAMESPACE
static int	RULE_NONE
static int	STRIP_SPACE
static int	USE_PREDICATE

Fields inherited from class org.apache.xalan.xsltc.compiler.TopLevelElement

_dependencies

Fields inherited from class org.apache.xalan.xsltc.compiler.SyntaxTreeNode

_attributes, _parent, _qname, Dummy, IndentIncrement, UNKNOWN_STYLESHEET_NODE_ID

Fields inherited from interface org.apache.xalan.xsltc.compiler.Constants

ABSOLUTE_ITERATOR, ACC_FINAL, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_SUPER, ADD_ATTRIBUTE, ADD_ATTRIBUTE_SIG, ADD_ITERATOR, ADD_ITERATOR_SIG, ADD_PARAMETER, ADD_PARAMETER_SIG, APPLY_TEMPLATES, ATTR_SET_SIG, ATTRIBUTE_LIST_FIELD, ATTRIBUTE_LIST_IMPL_CLASS, ATTRIBUTE_LIST_IMPL_SIG, ATTRIBUTES_SIG, BASIS_LIBRARY_CLASS, BOOLEAN_CLASS, BOOLEAN_VALUE, BOOLEAN_VALUE_SIG, CACHED_NODE_LIST_ITERATOR_CLASS, CHARACTERS, CHARACTERS_SIG, CHARACTERSW, CHARACTERSW_SIG, CLEAR_ATTRIBUTES, CLEAR_ATTRIBUTES_SIG, COLLATOR_CLASS, COLLATOR_SIG, COMPILER_PACKAGE, CURRENT_NODE_LIST_FILTER, CURRENT_NODE_LIST_FILTER_SIG, CURRENT_NODE_LIST_ITERATOR, CURRENT_NODE_LIST_ITERATOR_SIG, DEFAULT_NODE_COUNTER, DEFAULT_NODE_COUNTER_SIG, DOCUMENT_PNAME, DOM_ADAPTER_CLASS, DOM_ADAPTER_SIG, DOM_FIELD, DOM_IMPL, DOM_IMPL_CLASS, DOM_IMPL_SIG, DOM_INTF, DOM_INTF_SIG, DOM_PNAME, DOUBLE_CLASS, DOUBLE_SIG, DOUBLE_VALUE, DOUBLE_VALUE_SIG, DUP_FILTERED_ITERATOR, EMPTYATTR_FIELD, EMPTYSTRING, ERROR, EXPAND_STYLESHEET_QNAME_REF, EXPAND_STYLESHEET_QNAME_SIG, FALLBACK_CLASS, FATAL, FILTER_INTERFACE, FILTER_INTERFACE_SIG, FILTER_ITERATOR, FILTER_STEP_ITERATOR, FORMAT_SYMBOLS_FIELD, GET_ATTRIBUTE_VALUE, GET_ATTRIBUTE_VALUE_SIG, GET_CHILDREN, GET_CHILDREN_SIG, GET_ELEMENT_VALUE, GET_ELEMENT_VALUE_SIG, GET_ITERATOR_SIG, GET_NODE_NAME, GET_NODE_NAME_SIG, GET_NODE_TYPE, GET_NODE_TYPE_SIG, GET_NODE_VALUE, GET_NODE_VALUE_ITERATOR, GET_NODE_VALUE_ITERATOR_SIG, GET_NODE_VALUE_SIG, GET_PARAMETER, GET_PARAMETER_SIG, GET_PARENT, GET_PARENT_SIG, GET_TYPED_CHILDREN, GET_TYPED_CHILDREN_SIG, GET_UNPARSED_ENTITY_URI, GET_UNPARSED_ENTITY_URI_SIG, HAS_ATTRIBUTE, HAS_ATTRIBUTE_SIG, HASIDCALL_INDEX, HASIDCALL_INDEX_SIG, INT_VALUE, INT_VALUE_SIG, INTEGER_CLASS, INTEGER_SIG, INTERNAL, INVOKE_METHOD, ITERATOR_FIELD_SIG, ITERATOR_PNAME, KEY_INDEX_CLASS, KEY_INDEX_ITERATOR_SIG, KEY_INDEX_SIG, LAST_INDEX, LOAD_DOCUMENT_CLASS, LOCALE_CLASS, LOCALE_SIG, LOOKUP_STYLESHEET_QNAME_NS_REF, LOOKUP_STYLESHEET_QNAME_NS_SIG, MAKE_NODE, MAKE_NODE_LIST, MAKE_NODE_LIST_SIG, MAKE_NODE_LIST_SIG2, MAKE_NODE_SIG, MAKE_NODE_SIG2, MATCHING_ITERATOR, MATH_CLASS, MULTI_DOM_CLASS, MULTI_DOM_SIG, NAMES_INDEX, NAMES_INDEX_SIG, NAMESPACE_FEATURE, NAMESPACE_INDEX, NAMESPACE_INDEX_SIG, NEXT, NEXT_SIG, NEXTID, NODE, NODE_COUNTER, NODE_COUNTER_SIG, NODE_FIELD, NODE_FIELD_SIG, NODE_ITERATOR, NODE_ITERATOR_BASE, NODE_ITERATOR_SIG, NODE_PNAME, NODE_SIG, NODE_SORT_FACTORY, NODE_SORT_FACTORY_SIG, NODE_SORT_RECORD, NODE_SORT_RECORD_SIG, NS_ANCESTORS_INDEX_SIG, NTH_ITERATOR_CLASS, OBJECT_CLASS, OBJECT_SIG, ORDER_ITERATOR, ORDER_ITERATOR_SIG, OUTPUT_BASE, OUTPUT_HANDLER, OUTPUT_HANDLER_SIG, POP_PARAM_FRAME, POP_PARAM_FRAME_SIG, POSITION_INDEX, PREFIX_URIS_ARRAY_SIG, PREFIX_URIS_IDX_SIG, PUSH_PARAM_FRAME, PUSH_PARAM_FRAME_SIG, REDIRECT_URI, RESET, RESET_SIG, RTF_INITIAL_SIZE, RUNTIME_NODE_CLASS, RUNTIME_PACKAGE, SAX_IMPL, SAX_IMPL_CLASS, SAX_IMPL_SIG, SET_START_NODE, SET_START_NODE_SIG, SINGLETON_ITERATOR, SORT_ITERATOR, SORT_ITERATOR_SIG, STATIC_CHAR_DATA_FIELD, STATIC_CHAR_DATA_FIELD_SIG, STATIC_NAMES_ARRAY_FIELD, STATIC_NAMESPACE_ARRAY_FIELD, STATIC_NS_ANCESTORS_ARRAY_FIELD, STATIC_PREFIX_URIS_ARRAY_FIELD, STATIC_PREFIX_URIS_IDX_ARRAY_FIELD, STATIC_TYPES_ARRAY_FIELD, STATIC_URIS_ARRAY_FIELD, STEP_ITERATOR_CLASS, STREAM_XML_OUTPUT, STRING, STRING_BUFFER_CLASS, STRING_BUFFER_SIG, STRING_CLASS, STRING_SIG, STRING_TO_INT, STRING_TO_INT_SIG, STRING_TO_REAL, STRING_TO_REAL_SIG, STRING_VALUE_HANDLER, STRING_VALUE_HANDLER_SIG, STRING_WRITER, STRIP_SPACE_INTF, STRIP_SPACE_PARAMS, STRIP_SPACE_SIG, TRANSLET_CLASS, TRANSLET_FIELD, TRANSLET_FIELD_SIG, TRANSLET_INTF, TRANSLET_INTF_SIG, TRANSLET_OUTPUT_BASE, TRANSLET_OUTPUT_INTERFACE, TRANSLET_OUTPUT_PNAME, TRANSLET_OUTPUT_SIG, TRANSLET_PNAME, TRANSLET_SIG, TRANSLET_URI, TRANSLET_VERSION_INDEX, TRANSLET_VERSION_INDEX_SIG, TYPES_INDEX, TYPES_INDEX_SIG, UNION_ITERATOR_CLASS, UNION_ITERATOR_SIG, UNSUPPORTED, URIS_INDEX, URIS_INDEX_SIG, WARNING, WRITER_SIG, XHTML_URI, XMLNS_PREFIX, XMLNS_STRING, XMLNS_URI, XSLT_PACKAGE, XSLT_URI

Constructor Summary

Whitespace()

Method Summary

private static void	compileDefault(int defaultAction, ClassGenerator classGen) Compiles the predicate method
private static void	compilePredicate(java.util.Vector rules, int defaultAction, ClassGenerator classGen) Compiles the predicate method
static void	compilePreserveSpace(BranchHandle[] preserve, int pCount, InstructionList il)
static void	compileStripSpace(BranchHandle[] strip, int sCount, InstructionList il)
private static Whitespace.WhitespaceRule	findContradictingRule(java.util.Vector rules, Whitespace.WhitespaceRule rule) Scans through the rules vector and looks for a rule of higher priority that contradicts the current rule.
java.util.Vector	getRules() De-tokenize the elements listed in the 'elements' attribute and instanciate a set of strip/preserve rules.
void	parseContents(Parser parser) Parse the attributes of the xsl:strip/preserve-space element.
private static int	partition(java.util.Vector rules, int p, int r) Used with quicksort method above
private static int	prioritizeRules(java.util.Vector rules) Orders a set or rules by priority, removes redundant rules and rules that are shadowed by stronger, contradicting rules.
private static void	quicksort(java.util.Vector rules, int p, int r) Sorts a range of rules with regard to PRIORITY only
void	translate(ClassGenerator classGen, MethodGenerator methodGen) This method should not produce any code
static int	translateRules(java.util.Vector rules, ClassGenerator classGen) Takes a vector of WhitespaceRule objects and generates a predicate method.
Type	typeCheck(SymbolTable stable) Type-check contents/attributes - nothing to do...

Methods inherited from class org.apache.xalan.xsltc.compiler.TopLevelElement

addDependency, compile, display, getDependencies

Methods inherited from class org.apache.xalan.xsltc.compiler.SyntaxTreeNode

addAttribute, addElement, addPrefixMapping, compileResultTree, contextDependent, dependentContents, displayContents, elementAt, elementCount, elements, getAttribute, getAttribute, getAttributes, getContents, getImportPrecedence, getLineNumber, getNodeIDForStylesheetNSLookup, getParent, getParser, getPrefixMapping, getQName, getStylesheet, getSymbolTable, getTemplate, getXSLTC, hasAttribute, hasContents, indent, isDummy, lastChild, lookupNamespace, lookupPrefix, parseChildren, removeElement, reportError, reportWarning, setAttributes, setFirstElement, setLineNumber, setParent, setParser, setPrefixMapping, setQName, setQName, translateContents, typeCheckContents, updateScope

Methods inherited from class java.lang.Object

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

Field Detail

USE_PREDICATE

public static final int USE_PREDICATE

See Also:

Constant Field Values

STRIP_SPACE

public static final int STRIP_SPACE

See Also:

Constant Field Values

PRESERVE_SPACE

public static final int PRESERVE_SPACE

See Also:

Constant Field Values

RULE_NONE

public static final int RULE_NONE

See Also:

Constant Field Values

RULE_ELEMENT

public static final int RULE_ELEMENT

See Also:

Constant Field Values

RULE_NAMESPACE

public static final int RULE_NAMESPACE

See Also:

Constant Field Values

RULE_ALL

public static final int RULE_ALL

See Also:

Constant Field Values

_elementList

private java.lang.String _elementList

_action

private int _action

_importPrecedence

private int _importPrecedence

Constructor Detail

Whitespace

Whitespace()

Method Detail

parseContents

public void parseContents(Parser parser)

Parse the attributes of the xsl:strip/preserve-space element. The element should have not contents (ignored if any).

Overrides:

parseContents in class SyntaxTreeNode

Parameters:

parser - reference to the XSLT parser

getRules

public java.util.Vector getRules()

De-tokenize the elements listed in the 'elements' attribute and instanciate a set of strip/preserve rules.

findContradictingRule

private static Whitespace.WhitespaceRule findContradictingRule(java.util.Vector rules,
                                                               Whitespace.WhitespaceRule rule)

Scans through the rules vector and looks for a rule of higher priority that contradicts the current rule.

prioritizeRules

private static int prioritizeRules(java.util.Vector rules)

Orders a set or rules by priority, removes redundant rules and rules that are shadowed by stronger, contradicting rules.

compileStripSpace

public static void compileStripSpace(BranchHandle[] strip,
                                     int sCount,
                                     InstructionList il)

compilePreserveSpace

public static void compilePreserveSpace(BranchHandle[] preserve,
                                        int pCount,
                                        InstructionList il)

compilePredicate

private static void compilePredicate(java.util.Vector rules,
                                     int defaultAction,
                                     ClassGenerator classGen)

Compiles the predicate method

compileDefault

private static void compileDefault(int defaultAction,
                                   ClassGenerator classGen)

Compiles the predicate method

translateRules

public static int translateRules(java.util.Vector rules,
                                 ClassGenerator classGen)

Takes a vector of WhitespaceRule objects and generates a predicate method. This method returns the translets default action for handling whitespace text-nodes: - USE_PREDICATE (run the method generated by this method) - STRIP_SPACE (always strip whitespace text-nodes) - PRESERVE_SPACE (always preserve whitespace text-nodes)

quicksort

private static void quicksort(java.util.Vector rules,
                              int p,
                              int r)

Sorts a range of rules with regard to PRIORITY only

partition

private static int partition(java.util.Vector rules,
                             int p,
                             int r)

Used with quicksort method above

typeCheck

public Type typeCheck(SymbolTable stable)
               throws TypeCheckError

Type-check contents/attributes - nothing to do...

Overrides:

typeCheck in class TopLevelElement

Parameters:

stable - The compiler/parser's symbol table

Throws:

TypeCheckError

translate

public void translate(ClassGenerator classGen,
                      MethodGenerator methodGen)

This method should not produce any code

Overrides:

translate in class TopLevelElement

Parameters:

classGen - BCEL Java class generator

methodGen - BCEL Java method generator