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## net.sf.saxon.query
Class QueryModule

    java.lang.Object
      net.sf.saxon.query.QueryModule

All Implemented Interfaces:
  StaticContext

Direct Known Subclasses:
  QueryLibrary

    public class QueryModule

extends Object
implements StaticContext

This class represents a query module, and includes information about the static context of the query module. The class is intended for internal Saxon use. User settings that affect the static context are made in the StaticQueryContext object, and those settings are copied to each QueryModule when the query module is compiled.

Constructor Summary
`QueryModule(Configuration config, QueryModule importer)` Create a QueryModule for a library module.
`QueryModule(StaticQueryContext sqc)` Create a QueryModule for a main module, copying the data that has been set up in a StaticQueryContext object

Method Summary
`void` | `addImportedNamespace(String uri)` Register that this module imports a particular module namespace
`void` | `addImportedSchema(String targetNamespace, String baseURI, List locationURIs)` Add an imported schema to this static context.
`void` | `bindUnboundFunctionCalls()` Bind function calls that could not be bound when first encountered.
`void` | `bindUnboundVariables()` Bind unbound variables (these are typically variables that reference another module participating in a same-namespace cycle, since local forwards references are not allowed)
`Expression` | `bindVariable(StructuredQName qName)` Bind a variable used in a query to the expression in which it is declared.
`void` | `checkForCircularities(List compiledVars, XQueryFunctionLibrary globalFunctionLibrary)` Check for circular definitions of global variables.
`void` | `checkImportedFunctionSignature(XQueryFunction fd)` Check that all the types used in the signature of an imported function are available in the module of the caller of the function
`void` | `checkImportedType(SequenceType importedType, Declaration declaration)` Check that a SequenceType used in the definition of an imported variable or function is available in the importing module
`String` | `checkURIForPrefix(String prefix)` Get the URI for a prefix if there is one, return null if not.
`void` | `declareActiveNamespace(String prefix, String uri)` Declare an active namespace, that is, a namespace which as well as affecting the static context of the query, will also be copied to the result tree when element constructors are evaluated.
`void` | `declareFunction(XQueryFunction function)` Register a user-defined XQuery function.
`void` | `declarePrologNamespace(String prefix, String uri)` Register a namespace that is explicitly declared in the prolog of the query module.
`void` | `declareVariable(VariableDeclaration var)` Declare a global variable.
`void` | `explainGlobalFunctions(ExpressionPresenter out)` Output "explain" information about each declared function.
`void` | `fixupGlobalFunctions()` Fixup all references to global functions.
`List<GlobalVariableDefinition>` | `fixupGlobalVariables(SlotManager globalVariableMap)` Fixup all references to global variables.
`int[]` | `getActiveNamespaceCodes()` Get an array containing the namespace codes of all active namespaces.
`Map<String,HashSet<String>>` | `getAllImportedSchemata()` For the top-level module only, get all the schema modules imported anywhere in the query.
`String` | `getBaseURI()` Get the base URI for a module
`StringCollator` | `getCollation(String name)` Get a named collation.
`Configuration` | `getConfiguration()` Get the Saxon Configuration
`int` | `getConstructionMode()` Get the current construction mode
`DecimalFormatManager` | `getDecimalFormatManager()` Get a DecimalFormatManager to resolve the names of decimal formats used in calls to the format-number() function.
`String` | `getDefaultCollationName()` Get the name of the default collation.
`String` | `getDefaultElementNamespace()` Get the default XPath namespace for elements and types.
`String` | `getDefaultFunctionNamespace()` Get the default function namespace
`Executable` | `getExecutable()` Get the Executable, an object representing the compiled query and its environment.
`FunctionLibrary` | `getFunctionLibrary()` Get the function library containing all the in-scope functions available in this static context (that is, the functions available in this query module).
`XQueryFunctionLibrary` | `getGlobalFunctionLibrary()` Get the function library object that holds details of global functions
`SlotManager` | `getGlobalStackFrameMap()` Get the stack frame map for global variables.
`Iterator<GlobalVariableDefinition>` | `getGlobalVariables()` Get all global variables declared in or imported into this module
`ImportedFunctionLibrary` | `getImportedFunctionLibrary()` Get the function library object that holds details of imported functions
`Set<String>` | `getImportedSchemaNamespaces()` Get the set of imported schemas
`DecimalValue` | `getLanguageVersion()` Get the language version supported
`int` | `getLineNumber()` Get the line number of the expression within that container.
`XQueryFunctionLibrary` | `getLocalFunctionLibrary()` Get the functions declared locally within this module
`LocationMap` | `getLocationMap()` Get the LocationMap, an data structure used to identify the location of compiled expressions within the query source text.
`URI` | `getLocationURI()` Get the location URI for a module
`String` | `getModuleNamespace()` Get the namespace of the current library module.
`Iterator` | `getModuleVariables()` Get global variables declared in this module
`NamePool` | `getNamePool()` Get the NamePool used for compiling expressions
`NamespaceResolver` | `getNamespaceResolver()` Get a copy of the Namespace Context.
`ItemType` | `getRequiredContextItemType()` Get the required type of the context item.
`int` | `getRevalidationMode()` Get the revalidation mode.
`String` | `getSystemId()` Get the System ID for a module
`QueryModule` | `getTopLevelModule()` Get the QueryModule for the top-level module.
`String` | `getURIForPrefix(String prefix)` Get the URI for a prefix.
`UserFunction` | `getUserDefinedFunction(String uri, String localName, int arity)` Get the function with a given name and arity.
`StaticQueryContext` | `getUserQueryContext()` Get the StaticQueryContext object containing options set up by the user
`DecimalValue` | `getXPathLanguageLevel()` Get the XPath language level supported
`boolean` | `importsNamespace(String uri)` Ask whether this module directly imports a particular namespace
`boolean` | `importsNamespaceIndirectly(String uri)` Test whether this module imports a particular namespace directly or indirectly
`boolean` | `isAllowedBuiltInType(BuiltInAtomicType type)` Determine whether a built-in type is available in this context.
`boolean` | `isEmptyLeast()` Ask what is the option for where an empty sequence appears in the collation order, if not otherwise specified in the "order by" clause
`boolean` | `isImportedSchema(String namespace)` Get the schema for a given namespace, if it has been imported
`boolean` | `isInBackwardsCompatibleMode()` Determine whether Backwards Compatible Mode is used
`boolean` | `isInheritNamespaces()` Get the namespace inheritance mode
`boolean` | `isMainModule()` Ask whether this is a "main" module, in the sense of the XQuery language specification
`boolean` | `isPreserveBoundarySpace()` Ask whether the policy for boundary space is "preserve" or "strip"
`boolean` | `isPreserveNamespaces()` Get the namespace copy mode
`boolean` | `isSchemaAware()` Ask whether expressions compiled under this static context are schema-aware.
`void` | `issueWarning(String s, SourceLocator locator)` Issue a compile-time warning.
`boolean` | `isTopLevelModule()` Test whether this is a "top-level" module.
`boolean` | `isUpdating()` Ask whether the query is allowed to be updating
`Iterator` | `iterateImportedNamespaces()` Get an iterator over all the module namespaces that this module imports
`void` | `lookForModuleCycles(Stack referees, int lineNumber)` Look for module cycles.
`XPathContext` | `makeEarlyEvaluationContext()` Construct a dynamic context for early evaluation of constant subexpressions
`static QueryModule` | `makeQueryModule(String baseURI, Executable executable, QueryModule importer, String query, String namespaceURI, boolean allowCycles)` Supporting method to load an imported library module.
`boolean` | `mayImportModule(String namespace)` Check whether this module is allowed to import a module with namespace N.
`void` | `optimizeGlobalFunctions()` Optimize the body of all global functions.
`void` | `reportFatalError(XPathException err)` Report a fatal error in the query (via the registered ErrorListener)
`void` | `setBaseURI(String uri)` Set the base URI for a module
`void` | `setConstructionMode(int mode)` Set the construction mode for this module
`void` | `setDefaultCollationName(String collation)` Set the name of the default collation
`void` | `setDefaultElementNamespace(String uri)` Set the default element namespace as declared in the query prolog
`void` | `setDefaultFunctionNamespace(String uri)` Set the default function namespace
`void` | `setEmptyLeast(boolean least)` Set the option for where an empty sequence appears in the collation order, if not otherwise specified in the "order by" clause
`void` | `setExecutable(Executable executable)` Set the executable.
`void` | `setInheritNamespaces(boolean inherit)` Set the namespace inheritance mode
`void` | `setIsMainModule(boolean main)` Set whether this is a "Main" module, in the sense of the XQuery language specification
`void` | `setLocationURI(URI uri)` Set the location URI for a module
`void` | `setModuleNamespace(String uri)` Set the namespace for a library module.
`void` | `setPreserveBoundarySpace(boolean preserve)` Set the policy for preserving boundary space
`void` | `setPreserveNamespaces(boolean inherit)` Set the namespace copy mode
`void` | `setRevalidationMode(int mode)` Set the revalidation mode.
`void` | `setUpdating(boolean updating)` Set whether the query is allowed to be updating
`void` | `typeCheckGlobalVariables(List compiledVars)` Perform type checking on global variables.
`void` | `undeclareNamespace()` Undeclare the most recently-declared active namespace.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### QueryModule

    public QueryModule(StaticQueryContext sqc)
                throws XPathException

  Create a QueryModule for a main module, copying the data that has been set up in a StaticQueryContext object

  Parameters:
    `sqc` - the StaticQueryContext object from which this module is initialized
  Throws:
    `XPathException`

### QueryModule

    public QueryModule(Configuration config,
                       QueryModule importer)

  Create a QueryModule for a library module.

  Parameters:
    `config` - the Saxon configuration
    `importer` - the module that imported this module. This may be null, in the case where the library module is being imported into an XSLT stylesheet

Method Detail

### makeQueryModule

    public static QueryModule makeQueryModule(String baseURI,
                                              Executable executable,
                                              QueryModule importer,
                                              String query,
                                              String namespaceURI,
                                              boolean allowCycles)
                                       throws XPathException

  Supporting method to load an imported library module. Used also by saxon:import-query in XSLT.

  This method is intended for internal use only.

  Parameters:
    `baseURI` - The base URI and location URI of the module
    `executable` - The Executable
    `importer` - The importing query module (used to check for cycles). This is null when loading a query module from XSLT.
    `query` - The text of the query, after decoding and normalizing line endings
    `namespaceURI` - namespace of the query module to be loaded
    `allowCycles` - True if cycles of module imports (disallowed by the spec) are to be permitted
  Returns:
    The StaticQueryContext representing the loaded query module
  Throws:
    `XPathException`

### getConfiguration

    public Configuration getConfiguration()

  Get the Saxon Configuration

  Specified by:
    `getConfiguration` in interface `StaticContext`
  Returns:
    the Saxon Configuration

### getNamePool

    public NamePool getNamePool()

  Get the NamePool used for compiling expressions

  Specified by:
    `getNamePool` in interface `StaticContext`
  Returns:
    the name pool

### isTopLevelModule

    public boolean isTopLevelModule()

  Test whether this is a "top-level" module. This is true for a main module and also for a module directly imported into an XSLT stylesheet. It may also be true in future for independently-compiled modules

  Returns:
    true if this is top-level module

### setIsMainModule

    public void setIsMainModule(boolean main)

  Set whether this is a "Main" module, in the sense of the XQuery language specification

  Parameters:
    `main` - true if this is a main module, false if it is a library module

### isMainModule

    public boolean isMainModule()

  Ask whether this is a "main" module, in the sense of the XQuery language specification

  Returns:
    true if this is a main module, false if it is a library model

### mayImportModule

    public boolean mayImportModule(String namespace)

  Check whether this module is allowed to import a module with namespace N. Note that before calling this we have already handled the exception case where a module imports another in the same namespace (this is the only case where cycles are allowed, though as a late change to the spec they are no longer useful, since they cannot depend on each other cyclically)

  Parameters:
    `namespace` - the namespace to be tested
  Returns:
    true if the import is permitted

### isSchemaAware

    public boolean isSchemaAware()

  Ask whether expressions compiled under this static context are schema-aware. They must be schema-aware if the expression is to handle typed (validated) nodes

  Specified by:
    `isSchemaAware` in interface `StaticContext`
  Returns:
    true if expressions are schema-aware

### setInheritNamespaces

    public void setInheritNamespaces(boolean inherit)

  Set the namespace inheritance mode

  Parameters:
    `inherit` - true if namespaces are inherited, false if not
  Since:
    8.4

### isInheritNamespaces

    public boolean isInheritNamespaces()

  Get the namespace inheritance mode

  Returns:
    true if namespaces are inherited, false if not
  Since:
    8.4

### setPreserveNamespaces

    public void setPreserveNamespaces(boolean inherit)

  Set the namespace copy mode

  Parameters:
    `inherit` - true if namespaces are preserved, false if not

### isPreserveNamespaces

    public boolean isPreserveNamespaces()

  Get the namespace copy mode

  Returns:
    true if namespaces are preserved, false if not

### setConstructionMode

    public void setConstructionMode(int mode)

  Set the construction mode for this module

  Parameters:
    `mode` - one of `Validation.STRIP`, `Validation.PRESERVE`

### getConstructionMode

    public int getConstructionMode()

  Get the current construction mode

  Returns:
    one of `Validation.STRIP`, `Validation.PRESERVE`

### setPreserveBoundarySpace

    public void setPreserveBoundarySpace(boolean preserve)

  Set the policy for preserving boundary space

  Parameters:
    `preserve` - true if boundary space is to be preserved, false if it is to be stripped

### isPreserveBoundarySpace

    public boolean isPreserveBoundarySpace()

  Ask whether the policy for boundary space is "preserve" or "strip"

  Returns:
    true if the policy is to preserve boundary space, false if it is to strip it

### setEmptyLeast

    public void setEmptyLeast(boolean least)

  Set the option for where an empty sequence appears in the collation order, if not otherwise specified in the "order by" clause

  Parameters:
    `least` - true if the empty sequence is considered less than any other value (the default), false if it is considered greater than any other value

### isEmptyLeast

    public boolean isEmptyLeast()

  Ask what is the option for where an empty sequence appears in the collation order, if not otherwise specified in the "order by" clause

  Returns:
    true if the empty sequence is considered less than any other value (the default), false if it is considered greater than any other value

### getGlobalFunctionLibrary

    public XQueryFunctionLibrary getGlobalFunctionLibrary()

  Get the function library object that holds details of global functions

  Returns:
    the library of global functions

### getImportedFunctionLibrary

    public ImportedFunctionLibrary getImportedFunctionLibrary()

  Get the function library object that holds details of imported functions

  Returns:
    the library of imported functions

### addImportedNamespace

    public void addImportedNamespace(String uri)

  Register that this module imports a particular module namespace

  This method is intended for internal use.

  Parameters:
    `uri` - the URI of the imported namespace.

### importsNamespace

    public boolean importsNamespace(String uri)

  Ask whether this module directly imports a particular namespace

  This method is intended for internal use.

  Parameters:
    `uri` - the URI of the possibly-imported namespace.
  Returns:
    true if the schema for the namespace has been imported

### importsNamespaceIndirectly

    public boolean importsNamespaceIndirectly(String uri)

  Test whether this module imports a particular namespace directly or indirectly

  This method is intended for internal use.

  Parameters:
    `uri` - the URI of the possibly-imported namespace.
  Returns:
    true if the schema for the namespace has been imported

### iterateImportedNamespaces

    public Iterator iterateImportedNamespaces()

  Get an iterator over all the module namespaces that this module imports

  Returns:
    an iterator over the imported namespaces (delivered as strings)

### getTopLevelModule

    public QueryModule getTopLevelModule()

  Get the QueryModule for the top-level module. This will normally be a main module, but in the case of saxon:import-query it will be the library module that is imported into the stylesheet

  Returns:
    the StaticQueryContext object associated with the top level module

### getExecutable

    public Executable getExecutable()

  Get the Executable, an object representing the compiled query and its environment.

  This method is intended for internal use only.

  Returns:
    the Executable

### setExecutable

    public void setExecutable(Executable executable)

  Set the executable.

  This method is intended for internal use only.

  Parameters:
    `executable` - the Executable

### getUserQueryContext

    public StaticQueryContext getUserQueryContext()

  Get the StaticQueryContext object containing options set up by the user

  Returns:
    the user-created StaticQueryContext object

### getLocationMap

    public LocationMap getLocationMap()

  Get the LocationMap, an data structure used to identify the location of compiled expressions within the query source text.

  This method is intended for internal use only.

  Specified by:
    `getLocationMap` in interface `StaticContext`
  Returns:
    the LocationMap

### setModuleNamespace

    public void setModuleNamespace(String uri)

  Set the namespace for a library module.

  This method is for internal use only.

  Parameters:
    `uri` - the module namespace URI of the library module

### getModuleNamespace

    public String getModuleNamespace()

  Get the namespace of the current library module.

  This method is intended primarily for internal use.

  Returns:
    the module namespace, or null if this is a main module

### setLocationURI

    public void setLocationURI(URI uri)

  Set the location URI for a module

  Parameters:
    `uri` - the location URI

### getLocationURI

    public URI getLocationURI()

  Get the location URI for a module

  Returns:
    the location URI

### getSystemId

    public String getSystemId()

  Get the System ID for a module

  Specified by:
    `getSystemId` in interface `StaticContext`
  Returns:
    the location URI

### setBaseURI

    public void setBaseURI(String uri)

  Set the base URI for a module

  Parameters:
    `uri` - the base URI

### getBaseURI

    public String getBaseURI()

  Get the base URI for a module

  Specified by:
    `getBaseURI` in interface `StaticContext`
  Returns:
    the base URI

### getGlobalStackFrameMap

    public SlotManager getGlobalStackFrameMap()

  Get the stack frame map for global variables.

  This method is intended for internal use.

  Returns:
    the stack frame map (a SlotManager) for global variables.

### declareVariable

    public void declareVariable(VariableDeclaration var)
                         throws XPathException

  Declare a global variable. A variable must normally be declared before an expression referring to it is compiled, but there are exceptions where a set of modules in the same namespace import each other cyclically. Global variables are normally declared in the Query Prolog, but they can also be predeclared using the Java API. All global variables are held in the QueryModule for the main module. The fact that a global variable is present therefore does not mean that it is visible: there are two additional conditions (a) the module namespace must be imported into the module where the reference appears, and (b) the declaration must not be in the same module and textually after the reference.

  Note that the same VariableDeclaration object cannot be used with more than one query. This is because the VariableDeclaration is modified internally to hold a list of references to all the places where the variable is used.

  Parameters:
    `var` - the Variable declaration being declared
  Throws:
    `XPathException`

### getGlobalVariables

    public Iterator<GlobalVariableDefinition> getGlobalVariables()
                                                          throws XPathException

  Get all global variables declared in or imported into this module

  Returns:
    an iterator over the global variables
  Throws:
    `XPathException`

### fixupGlobalVariables

    public List<GlobalVariableDefinition> fixupGlobalVariables(SlotManager globalVariableMap)
                                                        throws XPathException

  Fixup all references to global variables.

  This method is for internal use by the Query Parser only.

  Parameters:
    `globalVariableMap` - a SlotManager that holds details of the assignment of slots to global variables.
  Returns:
    a list containing the global variable definitions.
  Throws:
    `XPathException`

### lookForModuleCycles

    public void lookForModuleCycles(Stack referees,
                                    int lineNumber)
                             throws XPathException

  Look for module cycles. This is a restriction introduced in the PR specification because of difficulties in defining the formal semantics.

  [Definition: A module M1 directly depends on another module M2 (different from M1) if a variable or function declared in M1 depends on a variable or function declared in M2.] It is a static error [err:XQST0093] to import a module M1 if there exists a sequence of modules M1 ... Mi ... M1 such that each module directly depends on the next module in the sequence (informally, if M1 depends on itself through some chain of module dependencies.)

  Parameters:
    `referees` - a Stack containing the chain of module import references leading to this module
    `lineNumber` - used for diagnostics
  Throws:
    `XPathException`

### getModuleVariables

    public Iterator getModuleVariables()

  Get global variables declared in this module

  Returns:
    an Iterator whose items are GlobalVariableDefinition objects

### checkForCircularities

    public void checkForCircularities(List compiledVars,
                                      XQueryFunctionLibrary globalFunctionLibrary)
                               throws XPathException

  Check for circular definitions of global variables.

  This method is intended for internal use

  Parameters:
    `compiledVars` - a list of `GlobalVariableDefinition` objects to be checked
  Throws:
    `XPathException`

### typeCheckGlobalVariables

    public void typeCheckGlobalVariables(List compiledVars)
                                  throws XPathException

  Perform type checking on global variables.

  This method is intended for internal use

  Parameters:
    `compiledVars` - a list of `GlobalVariableDefinition` objects to be checked
  Throws:
    `XPathException`

### bindVariable

    public Expression bindVariable(StructuredQName qName)
                            throws XPathException

  Bind a variable used in a query to the expression in which it is declared.

  This method is provided for use by the XQuery parser, and it should not be called by the user of the API, or overridden, unless variables are to be declared using a mechanism other than the declareVariable method of this class.

  Specified by:
    `bindVariable` in interface `StaticContext`
  Parameters:
    `qName` - the name of the variable to be bound
  Returns:
    a VariableReference object representing a reference to a variable on the abstract syntac rtee of the query.
  Throws:
    `XPathException`

### getFunctionLibrary

    public FunctionLibrary getFunctionLibrary()

  Get the function library containing all the in-scope functions available in this static context (that is, the functions available in this query module).

  This method is provided for use by advanced applications. The details of the interface are subject to change.

  Specified by:
    `getFunctionLibrary` in interface `StaticContext`
  Returns:
    the FunctionLibrary used. For XQuery, this will always be a FunctionLibraryList.
  See Also:
    `FunctionLibraryList`

### getLocalFunctionLibrary

    public XQueryFunctionLibrary getLocalFunctionLibrary()

  Get the functions declared locally within this module

  Returns:
    a FunctionLibrary object containing the function declarations

### declareFunction

    public void declareFunction(XQueryFunction function)
                         throws XPathException

  Register a user-defined XQuery function.

  This method is intended for internal use only.

  Parameters:
    `function` - the function being declared
  Throws:
    `XPathException`

### bindUnboundFunctionCalls

    public void bindUnboundFunctionCalls()
                                  throws XPathException

  Bind function calls that could not be bound when first encountered. These will either be forwards references to functions declared later in the same query module, or in modules that are being imported recursively, or errors.

  This method is for internal use only.

  Throws:
    `XPathException` - if a function call refers to a function that has not been declared

### fixupGlobalFunctions

    public void fixupGlobalFunctions()
                              throws XPathException

  Fixup all references to global functions. This method is called on completion of query parsing. Each XQueryFunction is required to bind all references to that function to the object representing the run-time executable code of the function.

  This method is for internal use only. It is called only on the StaticQueryContext for the main query body (not for library modules).

  Throws:
    `XPathException`

### optimizeGlobalFunctions

    public void optimizeGlobalFunctions()
                                 throws XPathException

  Optimize the body of all global functions.

  This method is for internal use only. It is called only on the StaticQueryContext for the main query body (not for library modules).

  Throws:
    `XPathException`

### explainGlobalFunctions

    public void explainGlobalFunctions(ExpressionPresenter out)

  Output "explain" information about each declared function.

  This method is intended primarily for internal use.

  Parameters:
    `out` - the expression presenter used to display the output

### getUserDefinedFunction

    public UserFunction getUserDefinedFunction(String uri,
                                               String localName,
                                               int arity)

  Get the function with a given name and arity. This method is provided so that XQuery functions can be called directly from a Java application. Note that there is no type checking or conversion of arguments when this is done: the arguments must be provided in exactly the form that the function signature declares them.

  Parameters:
    `uri` - the uri of the function name
    `localName` - the local part of the function name
    `arity` - the number of arguments.
  Returns:
    the user-defined function, or null if no function with the given name and arity can be located
  Since:
    8.4

### bindUnboundVariables

    public void bindUnboundVariables()
                              throws XPathException

  Bind unbound variables (these are typically variables that reference another module participating in a same-namespace cycle, since local forwards references are not allowed)

  Throws:
    `XPathException`

### addImportedSchema

    public void addImportedSchema(String targetNamespace,
                                  String baseURI,
                                  List locationURIs)

  Add an imported schema to this static context. A query module can reference types in a schema provided two conditions are satisfied: the schema containing those types has been loaded into the Configuration, and the target namespace has been imported by this query module. This method achieves the second of these conditions. It does not cause the schema to be loaded.

  Parameters:
    `targetNamespace` - The target namespace of the schema to be added
    `baseURI` - The base URI against which the locationURIs are to be absolutized
    `locationURIs` - a list of strings containing the absolutized URIs of the "location hints" supplied for this schema
  Since:
    8.4

### getAllImportedSchemata

    public Map<String,HashSet<String>> getAllImportedSchemata()

  For the top-level module only, get all the schema modules imported anywhere in the query.

  Returns:
    a Map whose key is the target namespace of a set of schema documents, and whose value is a Set containing the absolutized location URIs ("hints") of the locations from which those schema documents were loaded, as strings.

### isImportedSchema

    public boolean isImportedSchema(String namespace)

  Get the schema for a given namespace, if it has been imported

  Specified by:
    `isImportedSchema` in interface `StaticContext`
  Parameters:
    `namespace` - The namespace of the required schema. Supply "" for a no-namespace schema.
  Returns:
    The schema if found, or null if not found.
  Since:
    8.4

### getImportedSchemaNamespaces

    public Set<String> getImportedSchemaNamespaces()

  Get the set of imported schemas

  Specified by:
    `getImportedSchemaNamespaces` in interface `StaticContext`
  Returns:
    a Set, the set of URIs representing the names of imported schemas

### reportFatalError

    public void reportFatalError(XPathException err)

  Report a fatal error in the query (via the registered ErrorListener)

  Parameters:
    `err` - the error to be signalled

### checkImportedFunctionSignature

    public void checkImportedFunctionSignature(XQueryFunction fd)
                                        throws XPathException

  Check that all the types used in the signature of an imported function are available in the module of the caller of the function

  Parameters:
    `fd` - the declaration of the imported function
  Throws:
    `XPathException` - if an error is found

### checkImportedType

    public void checkImportedType(SequenceType importedType,
                                  Declaration declaration)
                           throws XPathException

  Check that a SequenceType used in the definition of an imported variable or function is available in the importing module

  Parameters:
    `importedType` - the type that is to be checked
    `declaration` - the containing query or function definition
  Throws:
    `XPathException` - if an error is fonnd.

### makeEarlyEvaluationContext

    public XPathContext makeEarlyEvaluationContext()

  Construct a dynamic context for early evaluation of constant subexpressions

  Specified by:
    `makeEarlyEvaluationContext` in interface `StaticContext`
  Returns:
    a dynamic context object

### getCollation

    public StringCollator getCollation(String name)

  Get a named collation.

  Specified by:
    `getCollation` in interface `StaticContext`
  Parameters:
    `name` - The name of the required collation. Supply null to get the default collation.
  Returns:
    the collation; or null if the required collation is not found.

### getDefaultCollationName

    public String getDefaultCollationName()

  Get the name of the default collation.

  Specified by:
    `getDefaultCollationName` in interface `StaticContext`
  Returns:
    the name of the default collation; or the name of the codepoint collation if no default collation has been defined

### setDefaultCollationName

    public void setDefaultCollationName(String collation)

  Set the name of the default collation

  Parameters:
    `collation` - the URI of the default collation
  Throws:
    `NullPointerException` - if the supplied collation name is null

### declarePrologNamespace

    public void declarePrologNamespace(String prefix,
                                       String uri)
                                throws XPathException

  Register a namespace that is explicitly declared in the prolog of the query module.

  Parameters:
    `prefix` - The namespace prefix. Must not be null.
    `uri` - The namespace URI. Must not be null. The value "" (zero-length string) is used to undeclare a namespace; it is not an error if there is no existing binding for the namespace prefix.
  Throws:
    `XPathException`

### declareActiveNamespace

    public void declareActiveNamespace(String prefix,
                                       String uri)

  Declare an active namespace, that is, a namespace which as well as affecting the static context of the query, will also be copied to the result tree when element constructors are evaluated. When searching for a prefix-URI binding, active namespaces are searched first, then passive namespaces. Active namespaces are later undeclared (in reverse sequence) using `undeclareNamespace()`.

  This method is intended for internal use only.

  Parameters:
    `prefix` - the namespace prefix
    `uri` - the namespace URI

### undeclareNamespace

    public void undeclareNamespace()

  Undeclare the most recently-declared active namespace. This method is called when a namespace declaration goes out of scope (while processing an element end tag). It is NOT called when an XML 1.1-style namespace undeclaration is encountered.

  This method is intended for internal use only.

  See Also:
    `declareActiveNamespace(String, String)`

### getURIForPrefix

    public String getURIForPrefix(String prefix)
                           throws XPathException

  Get the URI for a prefix. This method is used by the XQuery parser to resolve namespace prefixes.

  This method is intended primarily for internal use.

  Specified by:
    `getURIForPrefix` in interface `StaticContext`
  Parameters:
    `prefix` - The prefix
  Returns:
    the corresponding namespace URI
  Throws:
    `XPathException` - (with error code XPST0081) if the prefix has not been declared

### checkURIForPrefix

    public String checkURIForPrefix(String prefix)

  Get the URI for a prefix if there is one, return null if not. This method is used by the XQuery parser to resolve namespace prefixes.

  This method is intended primarily for internal use.

  Parameters:
    `prefix` - The prefix. Supply "" to obtain the default namespace for elements and types.
  Returns:
    the corresponding namespace URI, or null if the prefix has not been declared. If the prefix is "" and the default namespace is the non-namespace, return "".

### getDefaultElementNamespace

    public String getDefaultElementNamespace()

  Get the default XPath namespace for elements and types. Note that this is not necessarily the default namespace declared in the query prolog; within an expression, it may change in response to namespace declarations on element constructors.

  Specified by:
    `getDefaultElementNamespace` in interface `StaticContext`
  Returns:
    the default namespace, or `NamespaceConstant.NULL` for the non-namespace

### setDefaultElementNamespace

    public void setDefaultElementNamespace(String uri)

  Set the default element namespace as declared in the query prolog

  Parameters:
    `uri` - the default namespace for elements and types

### getDefaultFunctionNamespace

    public String getDefaultFunctionNamespace()

  Get the default function namespace

  Specified by:
    `getDefaultFunctionNamespace` in interface `StaticContext`
  Returns:
    the default namespace for function names

### setDefaultFunctionNamespace

    public void setDefaultFunctionNamespace(String uri)

  Set the default function namespace

  Parameters:
    `uri` - the default namespace for functions

### setRevalidationMode

    public void setRevalidationMode(int mode)

  Set the revalidation mode. This is used only if XQuery Updates are in use, in other cases the value is ignored.

  Parameters:
    `mode` - the revalidation mode. This must be one of `Validation.STRICT`, `Validation.LAX`, or `Validation.SKIP`

### getRevalidationMode

    public int getRevalidationMode()

  Get the revalidation mode. This is used only if XQuery Updates are in use, in other cases the value is ignored.

  Returns:
    the revalidation mode. This will be one of `Validation.STRICT`, `Validation.LAX`, or `Validation.SKIP`

### getActiveNamespaceCodes

    public int[] getActiveNamespaceCodes()

  Get an array containing the namespace codes of all active namespaces.

  This method is for internal use only.

  Returns:
    an array of namespace codes. A namespace code is an int that holds a prefix code in the top half and a uri code in the bottom half.

### getNamespaceResolver

    public NamespaceResolver getNamespaceResolver()

  Get a copy of the Namespace Context. This method is used internally by the query parser when a construct is encountered that needs to save the namespace context for use at run-time. Note that unlike other implementations of StaticContext, the state of the QueryModule changes as the query is parsed, with different namespaces in scope at different times. It's therefore necessary to compute the whole namespace context each time.

  This method is for internal use only.

  Specified by:
    `getNamespaceResolver` in interface `StaticContext`
  Returns:
    a namespace resolver.

### getRequiredContextItemType

    public ItemType getRequiredContextItemType()

  Get the required type of the context item. If no type has been explicitly declared for the context item, an instance of AnyItemType (representing the type item()) is returned.

  Specified by:
    `getRequiredContextItemType` in interface `StaticContext`
  Returns:
    the required type of the context item. Note that this is the same for all modules.
  Since:
    9.3

### getDecimalFormatManager

    public DecimalFormatManager getDecimalFormatManager()

  Get a DecimalFormatManager to resolve the names of decimal formats used in calls to the format-number() function.

  Specified by:
    `getDecimalFormatManager` in interface `StaticContext`
  Returns:
    the decimal format manager for this static context, or null if named decimal formats are not supported in this environment.

### issueWarning

    public void issueWarning(String s,
                             SourceLocator locator)

  Issue a compile-time warning. This method is used during XQuery expression compilation to output warning conditions.

  This method is intended for internal use only.

  Specified by:
    `issueWarning` in interface `StaticContext`
  Parameters:
    `s` - The warning message. This should not contain any prefix such as "Warning".
    `locator` - the location of the construct in question. May be null.

### getLineNumber

    public int getLineNumber()

  Get the line number of the expression within that container. Used to construct error messages. This method is provided to satisfy the StaticContext interface, but the value is meaningful only for XPath expressions within a document such as a stylesheet.

  Specified by:
    `getLineNumber` in interface `StaticContext`
  Returns:
    -1 always

### isInBackwardsCompatibleMode

    public boolean isInBackwardsCompatibleMode()

  Determine whether Backwards Compatible Mode is used

  Specified by:
    `isInBackwardsCompatibleMode` in interface `StaticContext`
  Returns:
    false; XPath 1.0 compatibility mode is not supported in XQuery
  Since:
    8.4

### isAllowedBuiltInType

    public boolean isAllowedBuiltInType(BuiltInAtomicType type)

  Determine whether a built-in type is available in this context. This method caters for differences between host languages as to which set of types are built in.

  Specified by:
    `isAllowedBuiltInType` in interface `StaticContext`
  Parameters:
    `type` - the supposedly built-in type. This will always be a type in the XS or XDT namespace.
  Returns:
    true if this type can be used in this static context

### setUpdating

    public void setUpdating(boolean updating)

  Set whether the query is allowed to be updating

  Parameters:
    `updating` - true if the query may use the XQuery Update facility (requires Saxon-EE)
  Since:
    9.1

### isUpdating

    public boolean isUpdating()

  Ask whether the query is allowed to be updating

  Returns:
    true if the query is allowed to use the XQuery Update facility
  Since:
    9.1

### getLanguageVersion

    public DecimalValue getLanguageVersion()

  Get the language version supported

  Returns:
    the language version (currently "1.0" or "3.0": "1.1" is sometimes accepted in place of "3.0")
  Since:
    9.2; changed in 9.3 to return a DecimalValue instead of a String

### getXPathLanguageLevel

    public DecimalValue getXPathLanguageLevel()

  Get the XPath language level supported

  Specified by:
    `getXPathLanguageLevel` in interface `StaticContext`
  Returns:
    3.0 if XQuery 3.0 is enabled, or 2.0 otherwise

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