org.apache.xalan.xsltc.compiler
Class FunctionAvailableCall

java.lang.Object
  org.apache.xalan.xsltc.compiler.SyntaxTreeNode
      org.apache.xalan.xsltc.compiler.Expression
          org.apache.xalan.xsltc.compiler.FunctionCall
              org.apache.xalan.xsltc.compiler.FunctionAvailableCall

All Implemented Interfaces:

Constants

final class FunctionAvailableCall
extends FunctionCall

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.xalan.xsltc.compiler.FunctionCall

FunctionCall.JavaType

Field Summary

private Expression	_arg
private boolean	_isFunctionAvailable
private java.lang.String	_nameOfFunct
private java.lang.String	_namespaceOfFunct

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

_thisArgument, EXSLT_COMMON, EXSLT_DATETIME, EXSLT_MATH, EXSLT_SETS, EXSLT_STRINGS, EXT_XALAN, EXT_XSLTC, JAVA_EXT_XALAN, JAVA_EXT_XALAN_OLD, JAVA_EXT_XSLTC, NAMESPACE_FORMAT_CLASS, NAMESPACE_FORMAT_CLASS_OR_PACKAGE, NAMESPACE_FORMAT_JAVA, NAMESPACE_FORMAT_PACKAGE

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

FunctionAvailableCall(QName fname, java.util.Vector arguments)
Constructs a FunctionAvailableCall FunctionCall.

Method Summary

java.lang.Object	evaluateAtCompileTime() Returns an object representing the compile-time evaluation of an expression.
boolean	getResult() Reports on whether the function specified in the argument to xslt function 'function-available' was found.
private boolean	hasMethods() for external java functions only: reports on whether or not the specified method is found in the specifed class.
private boolean	isInternalNamespace() Return true if the namespace uri is null or it is the XSLTC translet uri.
void	translate(ClassGenerator classGen, MethodGenerator methodGen) Calls to 'function-available' are resolved at compile time since the namespaces declared in the stylsheet are not available at run time.
Type	typeCheck(SymbolTable stable) Argument of function-available call must be literal, typecheck returns the type of function-available to be boolean.

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

argument, argument, argumentCount, getClassNameFromUri, getName, getSignature, getSignature, getSignature, isExtension, isStandard, replaceDash, setArgument, setParser, toString, translateDesynthesized, typeCheckArgs, typeCheckConstructor, typeCheckExternal, typeCheckStandard

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

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

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, getTemplate, 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

_arg

private Expression _arg

_nameOfFunct

private java.lang.String _nameOfFunct

_namespaceOfFunct

private java.lang.String _namespaceOfFunct

_isFunctionAvailable

private boolean _isFunctionAvailable

Constructor Detail

FunctionAvailableCall

public FunctionAvailableCall(QName fname,
                             java.util.Vector arguments)

Constructs a FunctionAvailableCall FunctionCall. Takes the function name qname, for example, 'function-available', and a list of arguments where the arguments must be instances of LiteralExpression.

Method Detail

typeCheck

public Type typeCheck(SymbolTable stable)
               throws TypeCheckError

Argument of function-available call must be literal, typecheck returns the type of function-available to be boolean.

Overrides:

typeCheck in class FunctionCall

Parameters:

stable - The compiler/parser's symbol table

Throws:

TypeCheckError

evaluateAtCompileTime

public java.lang.Object evaluateAtCompileTime()

Returns an object representing the compile-time evaluation of an expression. We are only using this for function-available and element-available at this time.

Overrides:

evaluateAtCompileTime in class Expression

hasMethods

private boolean hasMethods()

for external java functions only: reports on whether or not the specified method is found in the specifed class.

getResult

public boolean getResult()

Reports on whether the function specified in the argument to xslt function 'function-available' was found.

isInternalNamespace

private boolean isInternalNamespace()

Return true if the namespace uri is null or it is the XSLTC translet uri.

translate

public void translate(ClassGenerator classGen,
                      MethodGenerator methodGen)

Calls to 'function-available' are resolved at compile time since the namespaces declared in the stylsheet are not available at run time. Consequently, arguments to this function must be literals.

Overrides:

translate in class FunctionCall

Parameters:

classGen - BCEL Java class generator

methodGen - BCEL Java method generator