Package org.exist.xquery

Classes that implement the XQuery/XPath execution model.

See:
Description

Interface Summary

CompiledXQuery
Constants	Declares various constants and flags used by the query engine: axis specifiers, operators.
Expression	Base interface implemented by all classes which are part of an XQuery/XPath expression.
ExpressionVisitor	Defines a visitor to be used for traversing and analyzing the expression tree.
ExternalModule	An external library module implemented in XQuery and loaded through the "import module" directive.
IndexUseReporter	Expressions that use an index to speed-up their evaluation may implement this interface.
InternalModule	Defines an internal module implemented in Java.
Module	Defines an XQuery library module.
NodeSelector
NodeTest	The interface NodeTest
Optimizable

Class Summary

AbstractExpression
AbstractInternalModule	Abstract base class for an InternalModule.
AbstractInternalModule.FunctionComparator
AnalyzeContextInfo	Holds context information and execution hints for XQuery expressions.
AncestorSelector
AnyNodeTest	The class AnyNodeTest
AtomicToString
Atomize
AttributeConstructor	Node constructor for attribute nodes.
BasicExpressionVisitor	Basic implementation of the ExpressionVisitor interface.
BasicExpressionVisitor.FirstStepVisitor
BasicExpressionVisitor.VariableRefVisitor
BasicFunction	Abstract base class for simple functions.
BinaryOp
BindingExpression	Abstract superclass for the variable binding expressions "for" and "let".
CachedResult	This class is used to hold an intermediate result that can be cached.
Cardinality	Defines occurrence indicators (*,?,+).
CastableExpression	Implements the "castable as" XQuery expression.
CastExpression	CastExpression represents cast expressions as well as all type constructors.
CDATAConstructor	Constructs an in-memory CDATA node.
ChildSelector
CombiningExpression	Abstract base class for the XQuery/XPath combining operators "union", "intersect" and "except".
CommentConstructor
ConditionalExpression	XQuery if ...
DebuggableExpression
DefaultExpressionVisitor	An ExpressionVisitor which traverses the entire expression tree.
DeferredFunctionCall
Dependency	Defines bit flags to indicate, upon which parts of the execution context an expression depends (Expression.getDependencies()).
DescendantOrSelfSelector
DescendantSelector
DocumentConstructor	Implements a dynamic document constructor.
DynamicAttributeConstructor	Represents a dynamic attribute constructor.
DynamicCardinalityCheck	Runtime-check for the cardinality of a function parameter.
DynamicCommentConstructor	Implements a dynamic comment constructor.
DynamicNameCheck	Check element or attribute name to match sequence type.
DynamicPIConstructor	Dynamic constructor for processing instruction nodes.
DynamicTextConstructor	Implements a dynamic text constructor.
DynamicTypeCheck	Check a function parameter type at runtime.
ElementConstructor	Constructor for element nodes.
EnclosedExpr	Represents an enclosed expression {expr} inside element content.
Except
ExtensionExpression	Implements an XQuery extension expression.
ExternalModuleImpl	Default implementation of an ExternalModule.
FilteredExpression	FilteredExpression represents a primary expression with a predicate.
ForExpr	Represents an XQuery "for" expression.
Function	Abstract base class for all built-in and user-defined functions.
FunctionCall	Represents a call to a user-defined function UserDefinedFunction.
FunctionDef	A function definition, consisting of a signature and the implementing class.
FunctionFactory
FunctionId	Used to uniquely identify a function by its function name and arity.
FunctionSignature	Describes the signature of a built-in or user-defined function, i.e.
GeneralComparison	A general XQuery/XPath2 comparison expression.
GeneralComparison.IndexFlags
GroupSpec	A XQuery grouping specifier as specified in an "group by" clause (based on OrderSpec).
InstanceOfExpression	Implements the XQuery "instance of" operator.
InternalFunctionCall	Wrapper for internal modules in order to perform access control checks on internal module function calls.
Intersection
JavaCall	A special function call to a Java method or constructor.
LetExpr	Implements an XQuery let-expression.
LiteralValue	A literal value, i.e.
LocalVariable	Represents a local variable as declared by for and let.
LocationStep	Processes all location path steps (like descendant::*, ancestor::XXX).
LogicalOp	Base class for the boolean operators "and" and "or".
ModuleContext	Subclass of XQueryContext for imported modules.
NamespaceConstructor	Implements a dynamic namespace constructor.
NameTest
NodeComparison	Implements node comparisons: is, isnot, <<, >>.
NodeConstructor	Abstract base class for all node constructors.
OpAnd	Boolean operator "and".
OpNumeric	numeric operation on two operands by +, -, *, div, mod etc..
OpOr	Boolean operator "or".
Optimizer	Analyzes the query and marks optimizable expressions for the query engine.
Option	Represents an XQuery option declared via "declare option".
OrderSpec	An XQuery order specifier as specified in an "order by" clause.
ParentSelector
PathExpr	PathExpr is just a sequence of XQuery/XPath expressions, which will be called step by step.
PerformanceStats
PIConstructor	Constructor for processing-instruction nodes.
Pragma
Predicate	Handles predicate expressions.
Profiler	XQuery profiling output.
QuantifiedExpression	Represents a quantified expression: "some ...
RangeExpression	An XQuery range expression, like "1 to 10".
RootNode	Reads a set of document root nodes from the context.
SelfSelector
SequenceConstructor	An XQuery sequence constructor ",".
SimpleStep	Represents a primary expression in a simple path step like foo//$x.
Step
TextConstructor	Direct constructor for text nodes.
TreatAsExpression
TypeswitchExpression	Implements the XQuery typeswitch construct.
TypeTest	Tests if a node is of a given node type.
UnaryExpr	A unary minus or plus.
Union
UntypedValueCheck	Runtime-value check for untyped atomic values.
UserDefinedFunction
ValueComparison
Variable	An XQuery/XPath variable, consisting of a QName and a value.
VariableDeclaration	A global variable declaration (with: declare variable).
VariableReference	Represents a reference to an in-scope variable.
XPathUtil
XQuery
XQueryContext	The current XQuery execution context.
XQueryWatchDog

Exception Summary

StaticXQueryException
TerminatedException
TerminatedException.SizeLimitException
TerminatedException.TimeoutException
XPathException

Package org.exist.xquery Description

Classes that implement the XQuery/XPath execution model. Every query is translated into a graph of expression objects which can be repeatedly executed.

The base class for all expression objects is Expression.