## net.sf.saxon.query
Class StaticQueryContext

    java.lang.Object
      |
      +--net.sf.saxon.query.StaticQueryContext

All Implemented Interfaces:
  StaticContext

public class StaticQueryContext
extends java.lang.Object
implements StaticContext

StaticQueryContext is the implementation of StaticContext used when processing XQuery expressions. Note that some of the methods are intended for use internally by the query processor itself.

Note that a StaticQueryContext object may be initialized with context information that the query can use, but it is also modified when a query is compiled against it: for example, namespaces, variables, and functions declared in the query prolog are registered in the static context. Therefore, a StaticQueryContext object should not be used to compile more than one query.

Constructor Summary
`StaticQueryContext(Configuration config)` Create a StaticQueryContext using the default NamePool

Method Summary
`void` `addImportedSchema(java.lang.String targetNamespace)` Add an imported schema to this static context.
`protected void` `bindUnboundFunctionCalls()` Bind function calls that could not be bound when first encountered.
`VariableDeclaration` `bindVariable(int fingerprint)` Bind a variable used in a query to the expression in which it is declared.
`DocumentInfo` `buildDocument(javax.xml.transform.Source source)` Convenience method for building Saxon's internal representation of a source XML document.
`java.lang.String` `checkURIForPrefix(java.lang.String prefix)` Get the URI for a prefix if there is one, return null if not.
`void` `clearNamespaces()` Clear all the declared namespaces, except for the standard ones (xml, saxon, etc)
`XQueryExpression` `compileQuery(java.io.Reader source)` Prepare an XQuery query for subsequent evaluation.
`XQueryExpression` `compileQuery(java.lang.String query)` Prepare an XQuery query for subsequent evaluation.
`protected void` `declareActiveNamespace(java.lang.String prefix, java.lang.String uri)` Declare an active namespace
`void` `declareCollation(java.lang.String name, java.util.Comparator comparator)` Declare a named collation.
`void` `declareDefaultCollation(java.lang.String name)` Set the default collation.
`void` `declareFunction(XQueryFunction function)` Register a user-defined XQuery function
`protected void` `declarePassiveNamespace(java.lang.String prefix, java.lang.String uri)` Declare a namespace whose prefix can be used in expressions.
`void` `declareVariable(VariableDeclaration var)` Declare a global variable.
`void` `explainGlobalFunctions()` Output "explain" information about each declared function
`void` `explainGlobalVariables()` Produce "explain" output for all global variables
`protected void` `fixupGlobalFunctions()` Fixup all references to global functions.
`void` `fixupGlobalVariables(SlotManager globalVariableMap)` Fixup all references to global variables.
`int[]` `getActiveNamespaceCodes()` Get an array containing the namespace codes of all active namespaces.
`java.util.HashMap` `getAllCollations()` Get a HashMap that maps all registered collations to Comparators.
`java.lang.String` `getBaseURI()` Get the Base URI of the query, for resolving any relative URI's used in the expression.
`java.util.Comparator` `getCollation(java.lang.String name)` Get a named collation.
`Configuration` `getConfiguration()` Get the Configuration options
`int` `getConstructionMode()` Get the current validation mode
`java.lang.String` `getDefaultCollationName()` Get the name of the default collation.
`short` `getDefaultElementNamespace()` Get the default XPath namespace, as a namespace URI code that can be looked up in the NamePool
`java.lang.String` `getDefaultFunctionNamespace()` Get the default function namespace
`Executable` `getExecutable()`
`java.util.Iterator` `getFunctionDefinitions()` Get an iterator over the Functions defined in this module
`FunctionLibrary` `getFunctionLibrary()` Get the function library containing all the in-scope functions available in this static context
`SlotManager` `getGlobalStackFrameMap()` Get the stack frame map for global variables
`int` `getLineNumber()` Get the line number of the expression within that container.
`LocationMap` `getLocationMap()` Get the location map
`java.lang.String` `getModuleNamespace()` Get the namespace of the current library module.
`short` `getModuleNamespaceCode()` Get the namesapce code of the current library module.
`NamePool` `getNamePool()` Get the NamePool used for compiling expressions
`NamespaceResolver` `getNamespaceResolver()` Get a copy of the Namespace Context.
`SlotManager` `getStackFrameMap()` Get the stack frame map for local variables in the "main" query expression
`java.lang.String` `getSystemId()` Get the system ID of the container of the expression.
`java.lang.String` `getURIForPrefix(java.lang.String prefix)` Get the URI for a prefix.
`UserFunction` `getUserDefinedFunction(java.lang.String uri, java.lang.String localName, int arity)` Get the function with a given name and arity.
`java.util.Iterator` `getVariableDeclarations()` Get an iterator over the variables defined in this module
`boolean` `isImportedSchema(java.lang.String namespace)` Get the schema for a given namespace, if it has been imported
`boolean` `isInBackwardsCompatibleMode()` Determine whether Backwards Compatible Mode is used
`void` `issueWarning(java.lang.String s)` Issue a compile-time warning.
`protected StaticQueryContext` `loadModule(java.lang.String namespaceURI, java.lang.String locationURI)` Load another query module
`static StaticQueryContext` `loadQueryModule(Configuration config, Executable executable, java.lang.String baseURI, java.lang.String namespaceURI, java.lang.String locationURI)` Supporting method to load a query module.
`void` `reset()` Reset the state of this StaticQueryContext to an uninitialized state
`void` `setBaseURI(java.lang.String baseURI)` Set the Base URI of the query
`void` `setConfiguration(Configuration config)` Set the Configuration options
`void` `setConstructionMode(int mode)` Add a new validation mode to the stack of validation modes
`protected void` `setDefaultElementNamespace(java.lang.String uri)` Set the default element namespace
`void` `setDefaultFunctionNamespace(java.lang.String defaultFunctionNamespace)` Set the default function namespace
`void` `setExecutable(Executable executable)`
`void` `setModuleNamespace(java.lang.String uri)` Set the namespace for a library module
`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

### StaticQueryContext

    public StaticQueryContext(Configuration config)

  Create a StaticQueryContext using the default NamePool

Method Detail

### reset

    public void reset()

  Reset the state of this StaticQueryContext to an uninitialized state

### setConfiguration

    public void setConfiguration(Configuration config)

  Set the Configuration options

### getConfiguration

    public Configuration getConfiguration()

  Get the Configuration options

  Specified by:
    `getConfiguration` in interface `StaticContext`

### buildDocument

    public DocumentInfo buildDocument(javax.xml.transform.Source source)
                               throws XPathException

  Convenience method for building Saxon's internal representation of a source XML document. The document will be built using the default NamePool, which means that any process that uses it must also use the default NamePool.

  Parameters:
    `source` - Any javax.xml.transform.Source object representing the document against which queries will be executed. Note that a Saxon `DocumentInfo` (indeed any `NodeInfo`) can be used as a Source. To use a third-party DOM Document as a source, create an instance of `DOMSource` to wrap it.

    For additional control over the way in which the source document is processed, supply an `AugmentedSource` object and set appropriate options on the object.

  Returns:
    the DocumentInfo representing the root node of the resulting document object.
    `XPathException`

### compileQuery

    public XQueryExpression compileQuery(java.lang.String query)
                                  throws XPathException

  Prepare an XQuery query for subsequent evaluation. The source text of the query is supplied as a String. The base URI of the query is taken from the static context, and defaults to the current working directory.

  Parameters:
    `query` - The XQuery query to be evaluated, supplied as a string.
  Returns:
    an XQueryExpression object representing the prepared expression
  Throws:
    `XPathException` - if the syntax of the expression is wrong, or if it references namespaces, variables, or functions that have not been declared, or contains other static errors.

### compileQuery

    public XQueryExpression compileQuery(java.io.Reader source)
                                  throws XPathException,
                                         java.io.IOException

  Prepare an XQuery query for subsequent evaluation. The Query is supplied in the form of a Reader. The base URI of the query is taken from the static context, and defaults to the current working directory.

  Parameters:
    `source` - A Reader giving access to the text of the XQuery query to be compiled.
  Returns:
    an XPathExpression object representing the prepared expression.
  Throws:
    `XPathException` - if the syntax of the expression is wrong, or if it references namespaces, variables, or functions that have not been declared, or any other static error is reported.
    `java.io.IOException` - if a failure occurs reading the supplied input.

### getExecutable

    public Executable getExecutable()

### setExecutable

    public void setExecutable(Executable executable)

### getLocationMap

    public LocationMap getLocationMap()

  Description copied from interface: `StaticContext`
  Get the location map

  Specified by:
    `getLocationMap` in interface `StaticContext`

### declarePassiveNamespace

    protected void declarePassiveNamespace(java.lang.String prefix,
                                           java.lang.String uri)

  Declare a namespace whose prefix can be used in expressions. This is a passive namespace, it won't be copied into the result tree. Passive namespaces are never undeclared, and active namespaces override them.

  Parameters:
    `prefix` - The namespace prefix. Must not be null.
    `uri` - The namespace URI. Must not be null.

### declareActiveNamespace

    protected void declareActiveNamespace(java.lang.String prefix,
                                          java.lang.String uri)

  Declare an active namespace

### undeclareNamespace

    public void undeclareNamespace()

  Undeclare the most recently-declared active namespace

### clearNamespaces

    public void clearNamespaces()

  Clear all the declared namespaces, except for the standard ones (xml, saxon, etc)

### getURIForPrefix

    public java.lang.String getURIForPrefix(java.lang.String prefix)
                                     throws XPathException

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

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

### checkURIForPrefix

    public java.lang.String checkURIForPrefix(java.lang.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.

  Parameters:
    `prefix` - The prefix
  Returns:
    the corresponding namespace URI, or null if the prefix has not been declared.

### getActiveNamespaceCodes

    public int[] getActiveNamespaceCodes()

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

### 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.

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

### getDefaultFunctionNamespace

    public java.lang.String getDefaultFunctionNamespace()

  Get the default function namespace

  Specified by:
    `getDefaultFunctionNamespace` in interface `StaticContext`
  Returns:
    the default function namespace (defaults to the fn: namespace)

### setDefaultFunctionNamespace

    public void setDefaultFunctionNamespace(java.lang.String defaultFunctionNamespace)

  Set the default function namespace

  Parameters:
    `defaultFunctionNamespace` - The namespace to be used for unprefixed function calls

### setDefaultElementNamespace

    protected void setDefaultElementNamespace(java.lang.String uri)

  Set the default element namespace

### getDefaultElementNamespace

    public short getDefaultElementNamespace()

  Get the default XPath namespace, as a namespace URI code that can be looked up in the NamePool

  Specified by:
    `getDefaultElementNamespace` in interface `StaticContext`

### setModuleNamespace

    public void setModuleNamespace(java.lang.String uri)

  Set the namespace for a library module

### getModuleNamespace

    public java.lang.String getModuleNamespace()

  Get the namespace of the current library module.

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

### getModuleNamespaceCode

    public short getModuleNamespaceCode()

  Get the namesapce code of the current library module.

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

### declareCollation

    public void declareCollation(java.lang.String name,
                                 java.util.Comparator comparator)

  Declare a named collation. Collations are only available in a query if this method has been called externally to declare the collation and associate it with an implementation, in the form of a Java Comparator. The default collation is the Unicode codepoint collation, unless otherwise specified.

  Parameters:
    `name` - The name of the collation (technically, a URI)
    `comparator` - The Java Comparator used to implement the collating sequence

### declareDefaultCollation

    public void declareDefaultCollation(java.lang.String name)
                                 throws XPathException

  Set the default collation. The collation that is specified must be one that has been previously registered using the declareCollation() method.

  Parameters:
    `name` - The collation name
  Throws:
    `XPathException` - if the collation name has not been registered

### getCollation

    public java.util.Comparator getCollation(java.lang.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 identified by the given name, as set previously using declareCollation. Return null if no collation with this name is found.

### getDefaultCollationName

    public java.lang.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

### getAllCollations

    public java.util.HashMap getAllCollations()

  Get a HashMap that maps all registered collations to Comparators. Note that this returns a snapshot copy of the data held by the static context. This method is provided for internal use by the query processor.

### getGlobalStackFrameMap

    public SlotManager getGlobalStackFrameMap()

  Get the stack frame map for global variables

### declareVariable

    public void declareVariable(VariableDeclaration var)
                         throws StaticError

  Declare a global variable. A variable must be declared before an expression referring to it is compiled. Global variables are normally declared in the Query Prolog, but they can also be predeclared using this API.

    `StaticError`

### fixupGlobalVariables

    public void fixupGlobalVariables(SlotManager globalVariableMap)
                              throws StaticError

  Fixup all references to global variables. This method is for internal use by the Query Parser only.

    `StaticError`

### explainGlobalVariables

    public void explainGlobalVariables()

  Produce "explain" output for all global variables

### getVariableDeclarations

    public java.util.Iterator getVariableDeclarations()

  Get an iterator over the variables defined in this module

  Returns:
    an Iterator, whose items are VariableDeclaration objects. It returns all variables known to this module including those imported from elsewhere; they can be distinguished by their namespace. The variables are returned in order of declaration.

### getStackFrameMap

    public SlotManager getStackFrameMap()

  Get the stack frame map for local variables in the "main" query expression

### getNamePool

    public NamePool getNamePool()

  Get the NamePool used for compiling expressions

  Specified by:
    `getNamePool` in interface `StaticContext`

### issueWarning

    public void issueWarning(java.lang.String s)

  Issue a compile-time warning. This method is used during XPath expression compilation to output warning conditions. The default implementation writes the message to System.err. To change the destination of messages, create a subclass of StandaloneContext that overrides this method.

  Specified by:
    `issueWarning` in interface `StaticContext`

### setBaseURI

    public void setBaseURI(java.lang.String baseURI)

  Set the Base URI of the query

### getSystemId

    public java.lang.String getSystemId()

  Get the system ID of the container of the expression. Used to construct error messages.

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

### getBaseURI

    public java.lang.String getBaseURI()

  Get the Base URI of the query, for resolving any relative URI's used in the expression. Used by the document() function.

  Specified by:
    `getBaseURI` in interface `StaticContext`
  Returns:
    "" always

### getLineNumber

    public int getLineNumber()

  Get the line number of the expression within that container. Used to construct error messages.

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

### bindVariable

    public VariableDeclaration bindVariable(int fingerprint)
                                     throws StaticError

  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`
    `StaticError`

### getFunctionLibrary

    public FunctionLibrary getFunctionLibrary()

  Get the function library containing all the in-scope functions available in this static context

  Specified by:
    `getFunctionLibrary` in interface `StaticContext`

### declareFunction

    public void declareFunction(XQueryFunction function)
                         throws StaticError

  Register a user-defined XQuery function

    `StaticError`

### bindUnboundFunctionCalls

    protected void bindUnboundFunctionCalls()
                                     throws StaticError

  Bind function calls that could not be bound when first encountered. These will either be forwards references to functions declared later in the query, or errors. This method is for internal use.

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

### getFunctionDefinitions

    public java.util.Iterator getFunctionDefinitions()

  Get an iterator over the Functions defined in this module

  Returns:
    an Iterator, whose items are `XQueryFunction` objects. It returns all function known to this module including those imported from elsewhere; they can be distinguished by their namespace.

### fixupGlobalFunctions

    protected void fixupGlobalFunctions()
                                 throws StaticError

  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.

    `StaticError`

### explainGlobalFunctions

    public void explainGlobalFunctions()
                                throws XPathException

  Output "explain" information about each declared function

    `XPathException`

### getUserDefinedFunction

    public UserFunction getUserDefinedFunction(java.lang.String uri,
                                               java.lang.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.

### 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

### addImportedSchema

    public void addImportedSchema(java.lang.String targetNamespace)

  Add an imported schema to this static context.

  Parameters:
    `targetNamespace` - The target namespace of the schema to be added

### isImportedSchema

    public boolean isImportedSchema(java.lang.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.

### setConstructionMode

    public void setConstructionMode(int mode)

  Add a new validation mode to the stack of validation modes

### getConstructionMode

    public int getConstructionMode()

  Get the current validation mode

### loadModule

    protected StaticQueryContext loadModule(java.lang.String namespaceURI,
                                            java.lang.String locationURI)
                                     throws StaticError

  Load another query module

    `StaticError`

### loadQueryModule

    public static StaticQueryContext loadQueryModule(Configuration config,
                                                     Executable executable,
                                                     java.lang.String baseURI,
                                                     java.lang.String namespaceURI,
                                                     java.lang.String locationURI)
                                              throws StaticError

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

  Parameters:
    `config` - The configuration
    `executable` - The Executation
    `baseURI` - The base URI of the invoking module
    `namespaceURI` - namespace of the query module to be loaded
    `locationURI` - location hint of the query module to be loaded
  Returns:
    The StaticQueryContext representing the loaded query module
  Throws:
    `StaticError`