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## com.saxonica.deploy
Class CompiledUserQuery

    java.lang.Object
      com.saxonica.deploy.CompiledUserQuery

    public abstract class CompiledUserQuery

extends Object

This abstract class acts as a superclass for every compiled query generated by the Saxon code generator, other than queries compiled in servlet mode.

Queries compiled to use this superclass are not thread-safe: a new instance of the class must be created each time a query is run in a new thread. The class is, however, serially reusable.

The class supports two mechanisms for running a compiled query. The query can be run directly from the command line, or it can be integrated into an application and invoked via a Java API.

The class contains two kinds of method: methods (many of them abstract) that form the API to the query, enabling a client application to invoke the query and process the results; and concrete methods that provide run-time services to the compiled query itself.

Field Summary
`protected Configuration` | `config`
`protected DynamicQueryContext` | `dqc`
`protected Executable` | `exec`
`protected NamePool` | `namePool`
`protected TypeHierarchy` | `th`

Constructor Summary
`CompiledUserQuery()`

Method Summary
`protected void` | `dynamicError(String message, String code, XPathContext context)`
`protected boolean` | `generalCompare(SequenceIterator iter1, SequenceIterator iter2, SimpleAtomicComparer comparer, XPathContext context)` Helper method to implement a general comparison
`Configuration` | `getConfiguration()` Get the Configuration
`protected NodeInfo` | `getContextNode(Item item)` Helper method to get the context node, throwing appropriate exceptions if there isn't one
`Executable` | `getExecutable()` Get the Executable
`protected SlotManager` | `getStackFrameMap()` Get a StackFrameMap for the first local stackframe (that is, for the main query body).
`abstract void` | `importSchemata(Configuration config)` Load the schema documents that were imported into the query source code.
`abstract void` | `initializeGlobals(XPathContext context)` Run the query-specific initialization code.
`void` | `mainCommand(String[] args)` Run the query from the command line
`abstract void` | `process(XPathContext context)` Run the query, sending the results to the current output destination
`void` | `run(Result result, Properties outputProperties)` Run the query, sending the results directly to a JAXP Result object.
`void` | `setConfiguration(Configuration config)` Supply the configuration in which the query will be executed.
`void` | `setDynamicContext(DynamicQueryContext context)` Supply the dynamic context for the query.
`abstract void` | `setExternalVariable(String clarkName, ValueRepresentation value)` Supply the value of an external variable
`protected void` | `typeError(String message, String code, XPathContext context)`

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

Field Detail

### config

    protected Configuration config

### exec

    protected Executable exec

### dqc

    protected DynamicQueryContext dqc

### namePool

    protected NamePool namePool

### th

    protected TypeHierarchy th

Constructor Detail

### CompiledUserQuery

    public CompiledUserQuery()

Method Detail

### setConfiguration

    public void setConfiguration(Configuration config)

  Supply the configuration in which the query will be executed. Note that this is not required to be the same as the configuration under which the query was compiled. However, any schemas that are present in the run-time configuration must be unchanged from the versions that were used at compile time. If no configuration is supplied then the query will run with a default configuration.

  Parameters:
    `config` - the Configuration to be used. If the query is schema-aware, this must be an instance of `EnterpriseConfiguration`

### setExternalVariable

    public abstract void setExternalVariable(String clarkName,
                                             ValueRepresentation value)

  Supply the value of an external variable

  Parameters:
    `clarkName` - The expanded name of the variable in Clark notation: that is, the local name in the case of a name in no namespace, or "{uri}local" for a name with namespace URI "uri" and local name "local"
    `value` - The value to be assigned to the external variable

### setDynamicContext

    public void setDynamicContext(DynamicQueryContext context)

  Supply the dynamic context for the query. The dynamic context may include a context item, values of external query parameters, and other details. If no dynamic context is supplied, the query will run with a default context (no context item, no parameter values other than those provided using the method `setExternalVariable(java.lang.String, net.sf.saxon.om.ValueRepresentation)`).

  If any parameter values are included in the context, they will immediately be extracted from the supplied context object and passed to the query as if `setExternalVariable(java.lang.String, net.sf.saxon.om.ValueRepresentation)` were called. Subsequent changes to the context object have no effect. However, if the values supplied are mutable, it is undefined whether any subsequent changes to the values have any effect.

  Parameters:
    `context` - the dynamic context to be used.

### run

    public void run(Result result,
                    Properties outputProperties)
             throws XPathException

  Run the query, sending the results directly to a JAXP Result object. This way of executing the query is most efficient in the case of queries that produce a single document (or parentless element) as their output, because it avoids constructing the result tree in memory: instead, it is piped straight to the serializer.

  Parameters:
    `result` - the destination for the results of the query. The query is effectively wrapped in a document{} constructor, so that the items in the result are concatenated to form a single document; this is then written to the requested Result destination, which may be (for example) a DOMResult, a SAXResult, or a StreamResult
    `outputProperties` - Supplies serialization properties, in JAXP format, if the result is to be serialized. This parameter can be defaulted to null. Values supplied here take precedence over any values supplied in the query source using the saxon:output option declaration.
  Throws:
    `XPathException` - if the query fails.

### getConfiguration

    public Configuration getConfiguration()

  Get the Configuration

  Returns:
    the Saxon configuration object

### getExecutable

    public Executable getExecutable()

  Get the Executable

  Returns:
    the Executable containing this query

### initializeGlobals

    public abstract void initializeGlobals(XPathContext context)
                                    throws XPathException

  Run the query-specific initialization code. This code is generated as part of the compiled query.

  Parameters:
    `context` - the XPath dynamic context
  Throws:
    `XPathException`

### importSchemata

    public abstract void importSchemata(Configuration config)
                                 throws SchemaException

  Load the schema documents that were imported into the query source code. The implementation of this method is part of the generated code. This method is not called automatically when invoking the compiled query via the `run(javax.xml.transform.Result, java.util.Properties)` method; it can be called directly if required. It is called automatically when the query is run from the command line.

  Parameters:
    `config` - the Saxon Configuration (which must be schema-aware)
  Throws:
    `SchemaException`

### getStackFrameMap

    protected SlotManager getStackFrameMap()

  Get a StackFrameMap for the first local stackframe (that is, for the main query body).

  Returns:
    the stack frame map

### process

    public abstract void process(XPathContext context)
                          throws XPathException

  Run the query, sending the results to the current output destination

  Parameters:
    `context` - the XPath dynamic context
  Throws:
    `XPathException`

### typeError

    protected void typeError(String message,
                             String code,
                             XPathContext context)
                      throws XPathException

  Throws:
    `XPathException`

### dynamicError

    protected void dynamicError(String message,
                                String code,
                                XPathContext context)
                         throws XPathException

  Throws:
    `XPathException`

### getContextNode

    protected NodeInfo getContextNode(Item item)
                               throws XPathException

  Helper method to get the context node, throwing appropriate exceptions if there isn't one

  Parameters:
    `item` - the context item
  Returns:
    the supplied item if it is not null and is a node
  Throws:
    `XPathException` - if the context item does not exist or is not a node

### generalCompare

    protected boolean generalCompare(SequenceIterator iter1,
                                     SequenceIterator iter2,
                                     SimpleAtomicComparer comparer,
                                     XPathContext context)
                              throws XPathException

  Helper method to implement a general comparison

  Parameters:
    `iter1` - the first operand
    `iter2` - the second operand
    `comparer` - the comparer to be used
    `context` - the XPath dynamic context
  Returns:
    the result of the comparison
  Throws:
    `XPathException`

### mainCommand

    public void mainCommand(String[] args)
                     throws Exception

  Run the query from the command line

  Parameters:
    `args` - command line options
  Throws:
    `Exception`

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Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.