Class IndependentContext

java.lang.Object
net.sf.saxon.trans.IndependentContext
All Implemented Interfaces:
Serializable, StaticContext, NamespaceResolver

public class IndependentContext extends Object implements StaticContext, NamespaceResolver, Serializable
An IndependentContext provides a context for parsing an expression or pattern appearing in a context other than a stylesheet. This class was formerly named StandaloneContext. It has forked from that class, so that StandaloneContext could be changed to meet the demands of the JAXP 1.3 XPath API.
See Also:
  • Constructor Details

    • IndependentContext

      public IndependentContext()
    • IndependentContext

      public IndependentContext(Configuration config)
      Create an IndependentContext using a specific Configuration
  • Method Details

    • copy

      public IndependentContext copy()
      Create a copy of this IndependentContext. All aspects of the context are copied except for declared variables.
    • getConfiguration

      public Configuration getConfiguration()
      Get the system configuration
      Specified by:
      getConfiguration in interface StaticContext
    • makeEarlyEvaluationContext

      public XPathContext makeEarlyEvaluationContext()
      Construct a dynamic context for early evaluation of constant subexpressions
      Specified by:
      makeEarlyEvaluationContext in interface StaticContext
    • getLocationMap

      public LocationMap getLocationMap()
      Description copied from interface: StaticContext
      Get the location map. This is a mapping from short location ids held with each expression or subexpression, to a fully-resolved location in a source stylesheet or query.
      Specified by:
      getLocationMap in interface StaticContext
    • setLocationMap

      public void setLocationMap(LocationMap locationMap)
    • declareNamespace

      public void declareNamespace(String prefix, String uri)
      Declare a namespace whose prefix can be used in expressions
      Parameters:
      prefix - The namespace prefix. Must not be null. Supplying "" sets the default element namespace.
      uri - The namespace URI. Must not be null.
    • clearNamespaces

      public void clearNamespaces()
      Clear all the declared namespaces, except for the standard ones (xml, xslt, saxon, xdt). This also resets the default element namespace to the "null" namespace
    • clearAllNamespaces

      public void clearAllNamespaces()
      Clear all the declared namespaces, including the standard ones (xml, xslt, saxon). Leave only the XML namespace and the default namespace (xmlns=""). This also resets the default element namespace to the "null" namespace.
    • setNamespaces

      public void setNamespaces(NodeInfo node)
      Declares all the namespaces that are in-scope for a given node, removing all previous namespace declarations. In addition, the standard namespaces (xml, xslt, saxon) are declared. This method also sets the default element namespace to be the same as the default namespace for this node.
      Parameters:
      node - The node whose in-scope namespaces are to be used as the context namespaces. If the node is an attribute, text node, etc, then the namespaces of its parent element are used.
    • setNamespaceResolver

      public void setNamespaceResolver(NamespaceResolver resolver)
      Set an external namespace resolver. If this is set, then all resolution of namespace prefixes is delegated to the external namespace resolver, and namespaces declared individually on this IndependentContext object are ignored.
    • setBaseURI

      public void setBaseURI(String baseURI)
      Set the base URI in the static context
    • declareCollation

      public void declareCollation(String name, Comparator comparator, boolean isDefault)
      Declare a named collation
      Parameters:
      name - The name of the collation (technically, a URI)
      comparator - The Java Comparator used to implement the collating sequence
      isDefault - True if this is to be used as the default collation
    • getStackFrameMap

      public SlotManager getStackFrameMap()
      Get the stack frame map containing the slot number allocations for the variables declared in this static context
    • declareVariable

      public Variable declareVariable(QNameValue qname)
      Declare a variable. A variable must be declared before an expression referring to it is compiled. The initial value of the variable will be the empty sequence
      Parameters:
      qname - The name of the variable
      Returns:
      a Variable object representing information about the variable that has been declared.
    • declareVariable

      public Variable declareVariable(String qname) throws XPathException
      Declare a variable. A variable may be declared before an expression referring to it is compiled. Alternatively, a JAXP XPathVariableResolver may be supplied to perform the resolution. A variable that has been explicitly declared is used in preference.
      Parameters:
      qname - Lexical QName identifying the variable. The namespace prefix, if any, must have been declared before this method is called, or must be resolvable using the namespace context.
      Throws:
      XPathException
    • getSlotNumber

      public int getSlotNumber(QNameValue qname)
      Get the slot number allocated to a particular variable
      Returns:
      the slot number, or -1 if the variable has not been declared
    • getNamePool

      public NamePool getNamePool()
      Get the NamePool used for compiling expressions
      Specified by:
      getNamePool in interface StaticContext
    • issueWarning

      public void issueWarning(String s, SourceLocator locator)
      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
    • getSystemId

      public String getSystemId()
      Get the system ID of the container of the expression. Used to construct error messages.
      Specified by:
      getSystemId in interface StaticContext
      Returns:
      "" always
    • getBaseURI

      public String getBaseURI()
      Get the Base URI of the stylesheet element, for resolving any relative URI's used in the expression. Used by the document() function, resolve-uri(), etc.
      Specified by:
      getBaseURI in interface StaticContext
      Returns:
      "" if no base URI has been set
    • 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
    • getURIForPrefix

      public String getURIForPrefix(String prefix) throws XPathException
      Get the URI for a prefix, using the declared namespaces as the context for namespace resolution. The default namespace is NOT used when the prefix is empty. This method is provided for use by the XPath parser.
      Specified by:
      getURIForPrefix in interface StaticContext
      Parameters:
      prefix - The prefix
      Throws:
      XPathException - if the prefix is not declared
    • getNamespaceResolver

      public NamespaceResolver getNamespaceResolver()
      Description copied from interface: StaticContext
      Get a namespace resolver to resolve the namespaces declared in this static context.
      Specified by:
      getNamespaceResolver in interface StaticContext
      Returns:
      a namespace resolver.
    • getURIForPrefix

      public String getURIForPrefix(String prefix, boolean useDefault)
      Get the namespace URI corresponding to a given prefix. Return null if the prefix is not in scope.
      Specified by:
      getURIForPrefix in interface NamespaceResolver
      Parameters:
      prefix - the namespace prefix
      useDefault - true if the default namespace is to be used when the prefix is ""
      Returns:
      the uri for the namespace, or null if the prefix is not in scope. Return "" if the prefix maps to the null namespace.
    • iteratePrefixes

      public Iterator iteratePrefixes()
      Get an iterator over all the prefixes declared in this namespace context. This will include the default namespace (prefix="") and the XML namespace where appropriate
      Specified by:
      iteratePrefixes in interface NamespaceResolver
    • bindVariable

      public VariableReference bindVariable(int fingerprint) throws StaticError
      Bind a variable used in an XPath Expression to the XSLVariable element in which it is declared. This method is provided for use by the XPath 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:
      fingerprint - the name of the variable
      Returns:
      a VariableReference representing the variable reference, suitably initialized to refer to the corresponding variable declaration
      Throws:
      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
    • setFunctionLibrary

      public void setFunctionLibrary(FunctionLibrary lib)
      Set the function library to be used
    • getCollation

      public Comparator 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 identified by the given name, as set previously using declareCollation. Return null if no collation with this name is 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
    • getDefaultElementNamespace

      public short getDefaultElementNamespace()
      Get the default XPath namespace, as a namespace code that can be looked up in the NamePool
      Specified by:
      getDefaultElementNamespace in interface StaticContext
    • setDefaultElementNamespace

      public void setDefaultElementNamespace(String uri)
      Set the default namespace for elements and types
    • setDefaultFunctionNamespace

      public void setDefaultFunctionNamespace(String uri)
      Set the default function namespace
    • getDefaultFunctionNamespace

      public String getDefaultFunctionNamespace()
      Get the default function namespace
      Specified by:
      getDefaultFunctionNamespace in interface StaticContext
    • 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 the standalone XPath API
    • isImportedSchema

      public boolean isImportedSchema(String namespace)
      Description copied from interface: StaticContext
      Determine whether a Schema for a given target namespace has been imported. Note that the in-scope element declarations, attribute declarations and schema types are the types registered with the (schema-aware) configuration, provided that their namespace URI is registered in the static context as being an imported schema namespace. (A consequence of this is that within a Configuration, there can only be one schema for any given namespace, including the null namespace).
      Specified by:
      isImportedSchema in interface StaticContext
    • isAllowedBuiltInType

      public boolean isAllowedBuiltInType(AtomicType 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
    • getImportedSchemaNamespaces

      public Set 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
    • setImportedSchemaNamespaces

      public void setImportedSchemaNamespaces(Set namespaces)