org.apache.xalan.xsltc.compiler
Class StepPattern

java.lang.Object
  org.apache.xalan.xsltc.compiler.SyntaxTreeNode
      org.apache.xalan.xsltc.compiler.Expression
          org.apache.xalan.xsltc.compiler.Pattern
              org.apache.xalan.xsltc.compiler.LocationPathPattern
                  org.apache.xalan.xsltc.compiler.RelativePathPattern
                      org.apache.xalan.xsltc.compiler.StepPattern

All Implemented Interfaces:

Constants

Direct Known Subclasses:

ProcessingInstructionPattern

 class StepPattern
extends RelativePathPattern

Field Summary

protected int	_axis
private int	_contextCase
private boolean	_isEpsilon
protected int	_nodeType
protected java.util.Vector	_predicates
private double	_priority
private Step	_step
private static int	GENERAL_CONTEXT
private static int	NO_CONTEXT
private static int	SIMPLE_CONTEXT

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

_falseList, _trueList, _type

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, 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

StepPattern(int axis, int nodeType, java.util.Vector predicates)

Method Summary

private int	analyzeCases()
int	getAxis()
double	getDefaultPriority()
StepPattern	getKernelPattern()
private java.lang.String	getNextFieldName()
int	getNodeType()
protected boolean	hasPredicates()
boolean	isWildcard()
void	reduceKernelPattern()
void	setParser(Parser parser) Set this node's parser.
StepPattern	setPredicates(java.util.Vector predicates)
void	setPriority(double priority)
java.lang.String	toString()
void	translate(ClassGenerator classGen, MethodGenerator methodGen) Translate this node into JVM bytecodes.
private void	translateGeneralContext(ClassGenerator classGen, MethodGenerator methodGen)
private void	translateKernel(ClassGenerator classGen, MethodGenerator methodGen)
private void	translateNoContext(ClassGenerator classGen, MethodGenerator methodGen)
private void	translateSimpleContext(ClassGenerator classGen, MethodGenerator methodGen)
Type	typeCheck(SymbolTable stable) Returns the type of a pattern, which is always a NodeType.

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

getPriority, getTemplate, noSmallerThan, setTemplate

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

backPatchFalseList, backPatchTrueList, compile, desynthesize, evaluateAtCompileTime, getFalseList, getTrueList, getType, hasLastCall, hasPositionCall, lookupPrimop, startIterator, synthesize, translateDesynthesized

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

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

Methods inherited from class java.lang.Object

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

Field Detail

NO_CONTEXT

private static final int NO_CONTEXT

See Also:

Constant Field Values

SIMPLE_CONTEXT

private static final int SIMPLE_CONTEXT

See Also:

Constant Field Values

GENERAL_CONTEXT

private static final int GENERAL_CONTEXT

See Also:

Constant Field Values

_axis

protected final int _axis

_nodeType

protected final int _nodeType

_predicates

protected java.util.Vector _predicates

_step

private Step _step

_isEpsilon

private boolean _isEpsilon

_contextCase

private int _contextCase

_priority

private double _priority

Constructor Detail

StepPattern

public StepPattern(int axis,
                   int nodeType,
                   java.util.Vector predicates)

Method Detail

setParser

public void setParser(Parser parser)

Description copied from class: SyntaxTreeNode

Set this node's parser. The parser (the XSLT parser) gives this syntax tree node access to the symbol table and XPath parser.

Overrides:

setParser in class SyntaxTreeNode

Parameters:

parser - The XSLT parser.

getNodeType

public int getNodeType()

setPriority

public void setPriority(double priority)

getKernelPattern

public StepPattern getKernelPattern()

Specified by:

getKernelPattern in class LocationPathPattern

isWildcard

public boolean isWildcard()

Specified by:

isWildcard in class LocationPathPattern

setPredicates

public StepPattern setPredicates(java.util.Vector predicates)

hasPredicates

protected boolean hasPredicates()

getDefaultPriority

public double getDefaultPriority()

Overrides:

getDefaultPriority in class LocationPathPattern

getAxis

public int getAxis()

Overrides:

getAxis in class LocationPathPattern

reduceKernelPattern

public void reduceKernelPattern()

Specified by:

reduceKernelPattern in class LocationPathPattern

toString

public java.lang.String toString()

Overrides:

toString in class LocationPathPattern

analyzeCases

private int analyzeCases()

getNextFieldName

private java.lang.String getNextFieldName()

typeCheck

public Type typeCheck(SymbolTable stable)
               throws TypeCheckError

Description copied from class: Pattern

Returns the type of a pattern, which is always a NodeType. A NodeType has a number of subtypes defined by NodeType._type corresponding to each type of node.

Overrides:

typeCheck in class LocationPathPattern

Parameters:

stable - The compiler/parser's symbol table

Throws:

TypeCheckError

translateKernel

private void translateKernel(ClassGenerator classGen,
                             MethodGenerator methodGen)

translateNoContext

private void translateNoContext(ClassGenerator classGen,
                                MethodGenerator methodGen)

translateSimpleContext

private void translateSimpleContext(ClassGenerator classGen,
                                    MethodGenerator methodGen)

translateGeneralContext

private void translateGeneralContext(ClassGenerator classGen,
                                     MethodGenerator methodGen)

translate

public void translate(ClassGenerator classGen,
                      MethodGenerator methodGen)

Description copied from class: Pattern

Translate this node into JVM bytecodes. Patterns are translated as boolean expressions with true/false lists. Before calling translate on a pattern, make sure that the node being matched is on top of the stack. After calling translate, make sure to backpatch both true and false lists. True lists are the default, in the sense that they always "fall through". If this is not the intended semantics (e.g., see AlternativePattern.translate(org.apache.xalan.xsltc.compiler.util.ClassGenerator, org.apache.xalan.xsltc.compiler.util.MethodGenerator)) then a GOTO must be appended to the instruction list after calling translate.

Overrides:

translate in class LocationPathPattern

Parameters:

classGen - BCEL Java class generator

methodGen - BCEL Java method generator