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## net.sf.saxon.expr.instruct
Class ResultDocument

    java.lang.Object
      net.sf.saxon.expr.Expression
          net.sf.saxon.expr.instruct.Instruction
              net.sf.saxon.expr.instruct.ResultDocument

All Implemented Interfaces:
  Serializable, SourceLocator, LocationProvider, SaxonLocator, DivisibleInstruction, TailCallReturner, ValidatingInstruction, InstructionInfo, Locator

    public class ResultDocument

extends Instruction
implements DivisibleInstruction, ValidatingInstruction

The compiled form of an xsl:result-document element in the stylesheet.

The xsl:result-document element takes an attribute href="filename". The filename will often contain parameters, e.g. {position()} to ensure that a different file is produced for each element instance.

There is a further attribute "format" which determines the format of the output file, it identifies the name of an xsl:output element containing the output format details. In addition, individual serialization properties may be specified as attributes. These are attribute value templates, so they may need to be computed at run-time.

See Also:
  Serialized Form

Field Summary

Fields inherited from class net.sf.saxon.expr.Expression
`EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, WATCH_METHOD`

Constructor Summary
`ResultDocument(Properties globalProperties, Properties localProperties, Expression href, Expression formatExpression, String baseURI, int validationAction, SchemaType schemaType, IntHashMap<Expression> serializationAttributes, NamespaceResolver nsResolver)` Create a result-document instruction

Method Summary
`Expression` | `copy()` Copy an expression.
`void` | `explain(ExpressionPresenter out)` Diagnostic print of expression structure.
`Expression` | `getContentExpression()` Get the expression that constructs the content
`int` | `getInstructionNameCode()` Get the name of this instruction for diagnostic and tracing purposes (the string "xsl:result-document")
`int` | `getIntrinsicDependencies()` Determine the intrinsic dependencies of an expression, that is, those which are not derived from the dependencies of its subexpressions.
`ItemType` | `getItemType(TypeHierarchy th)` Get the item type of the items returned by evaluating this instruction
`SchemaType` | `getSchemaType()`
`int` | `getValidationAction()`
`Iterator<Expression>` | `iterateSubExpressions()` Get all the XPath expressions associated with this instruction (in XSLT terms, the expression present on attributes of the instruction, as distinct from the child instructions in a sequence construction)
`Expression` | `optimize(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType)` Perform optimisation of an expression and its subexpressions.
`void` | `process(Expression content, XPathContext context)` Evaluation method designed for calling from compiled bytecode.
`TailCall` | `processLeavingTail(XPathContext context)` ProcessLeavingTail: called to do the real work of this instruction.
`void` | `processLeft(Stack<XPathContext> contextStack, Stack<Object> state)` In streaming mode, process the first half of the instruction (for example, to start a new document or element)
`void` | `processRight(Stack<XPathContext> contextStack, Stack<Object> state)` In streaming mode, process the right half of the instruction (for example, to end a new document or element)
`static void` | `processXslOutputElement(NodeInfo element, Properties props, XPathContext c)` Construct a set of output properties from an xsl:output element supplied at run-time
`protected void` | `promoteInst(PromotionOffer offer)` Handle promotion offers, that is, non-local tree rewrites.
`boolean` | `replaceSubExpression(Expression original, Expression replacement)` Replace one subexpression by a replacement subexpression
`void` | `setContentExpression(Expression content)` Set the expression that constructs the content
`void` | `setDynamicOutputElement(Expression exp)` Set an expression that evaluates to a run-time xsl:output element, used in the saxon:result-document() extension function designed for use in XQuery
`static void` | `setSerializationProperty(Properties details, String uri, String lname, String value, NamespaceResolver nsResolver, boolean prevalidated, Configuration config)` Validate a serialization property and add its value to a Properties collection
`void` | `setUseStaticBaseUri(boolean staticBase)` Set whether the the instruction should resolve the href relative URI against the static base URI (rather than the dynamic base output URI)
`Expression` | `simplify(ExpressionVisitor visitor)` Simplify an expression.
`Expression` | `typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType)` Perform type checking of an expression and its subexpressions.

Methods inherited from class net.sf.saxon.expr.instruct.Instruction
`assembleParams, assembleTunnelParams, computeCardinality, computeSpecialProperties, createsNewNodes, dynamicError, evaluateAsString, evaluateItem, getConstructType, getExpressionName, getImplementationMethod, getInstructionName, getIteratorFromProcessMethod, getSourceLocator, isXSLT, iterate, process, promote`

Methods inherited from class net.sf.saxon.expr.Expression
`addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getContainer, getDependencies, getEvaluationMethod, getExecutable, getHostLanguage, getIntegerBounds, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasLoopingSubexpression, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterateEvents, iterateSameFocusSubExpressions, markTailFunctionCalls, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toString, typeError`

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

Methods inherited from interface javax.xml.transform.SourceLocator
`getColumnNumber, getLineNumber, getPublicId, getSystemId`

Constructor Detail

### ResultDocument

    public ResultDocument(Properties globalProperties,
                          Properties localProperties,
                          Expression href,
                          Expression formatExpression,
                          String baseURI,
                          int validationAction,
                          SchemaType schemaType,
                          IntHashMap<Expression> serializationAttributes,
                          NamespaceResolver nsResolver)

  Create a result-document instruction

  Parameters:
    `globalProperties` - properties defined on static xsl:output
    `localProperties` - non-AVT properties defined on result-document element
    `href` - href attribute of instruction
    `formatExpression` - format attribute of instruction
    `baseURI` - base URI of the instruction
    `validationAction` - for example `Validation.STRICT`
    `schemaType` - schema type against which output is to be validated
    `serializationAttributes` - computed local properties
    `nsResolver` - namespace resolver

Method Detail

### setContentExpression

    public void setContentExpression(Expression content)

  Set the expression that constructs the content

  Parameters:
    `content` - the expression defining the content of the result document

### getContentExpression

    public Expression getContentExpression()

  Get the expression that constructs the content

  Specified by:
    `getContentExpression` in interface `DivisibleInstruction`
  Returns:
    the content expression

### setDynamicOutputElement

    public void setDynamicOutputElement(Expression exp)

  Set an expression that evaluates to a run-time xsl:output element, used in the saxon:result-document() extension function designed for use in XQuery

  Parameters:
    `exp` - the expression whose result should be an xsl:output element

### setUseStaticBaseUri

    public void setUseStaticBaseUri(boolean staticBase)

  Set whether the the instruction should resolve the href relative URI against the static base URI (rather than the dynamic base output URI)

  Parameters:
    `staticBase` - set to true by fn:put(), to resolve against the static base URI of the query. Default is false, which causes resolution against the base output URI obtained dynamically from the Controller

### simplify

    public Expression simplify(ExpressionVisitor visitor)
                        throws XPathException

  Simplify an expression. This performs any static optimization (by rewriting the expression as a different expression). The default implementation does nothing.

  Specified by:
    `simplify` in class `Instruction`
  Parameters:
    `visitor` - an expression visitor
  Returns:
    the simplified expression
  Throws:
    `XPathException` - if an error is discovered during expression rewriting

### typeCheck

    public Expression typeCheck(ExpressionVisitor visitor,
                                ExpressionVisitor.ContextItemType contextItemType)
                         throws XPathException

  Description copied from class: `Expression`
  Perform type checking of an expression and its subexpressions. This is the second phase of static optimization.

  This checks statically that the operands of the expression have the correct type; if necessary it generates code to do run-time type checking or type conversion. A static type error is reported only if execution cannot possibly succeed, that is, if a run-time type error is inevitable. The call may return a modified form of the expression.

  This method is called after all references to functions and variables have been resolved to the declaration of the function or variable. However, the types of such functions and variables may not be accurately known if they have not been explicitly declared.

  If the implementation returns a value other than "this", then it is required to ensure that the location information in the returned expression have been set up correctly. It should not rely on the caller to do this, although for historical reasons many callers do so.

  Overrides:
    `typeCheck` in class `Expression`
  Parameters:
    `visitor` - an expression visitor
    `contextItemType` - the static type of "." at the point where this expression is invoked. The parameter is set to null if it is known statically that the context item will be undefined. If the type of the context item is not known statically, the argument is set to `Type.ITEM_TYPE`
  Returns:
    the original expression, rewritten to perform necessary run-time type checks, and to perform other type-related optimizations
  Throws:
    `XPathException` - if an error is discovered during this phase (typically a type error)

### optimize

    public Expression optimize(ExpressionVisitor visitor,
                               ExpressionVisitor.ContextItemType contextItemType)
                        throws XPathException

  Description copied from class: `Expression`
  Perform optimisation of an expression and its subexpressions. This is the third and final phase of static optimization.

  This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.

  Overrides:
    `optimize` in class `Expression`
  Parameters:
    `visitor` - an expression visitor
    `contextItemType` - the static type of "." at the point where this expression is invoked. The parameter is set to null if it is known statically that the context item will be undefined. If the type of the context item is not known statically, the argument is set to `Type.ITEM_TYPE`
  Returns:
    the original expression, rewritten if appropriate to optimize execution
  Throws:
    `XPathException` - if an error is discovered during this phase (typically a type error)

### getIntrinsicDependencies

    public int getIntrinsicDependencies()

  Description copied from class: `Expression`
  Determine the intrinsic dependencies of an expression, that is, those which are not derived from the dependencies of its subexpressions. For example, position() has an intrinsic dependency on the context position, while (position()+1) does not. The default implementation of the method returns 0, indicating "no dependencies".

  Overrides:
    `getIntrinsicDependencies` in class `Expression`
  Returns:
    a set of bit-significant flags identifying the "intrinsic" dependencies. The flags are documented in class net.sf.saxon.value.StaticProperty

### copy

    public Expression copy()

  Copy an expression. This makes a deep copy.

  Specified by:
    `copy` in class `Expression`
  Returns:
    the copy of the original expression

### promoteInst

    protected void promoteInst(PromotionOffer offer)
                        throws XPathException

  Handle promotion offers, that is, non-local tree rewrites.

  Overrides:
    `promoteInst` in class `Instruction`
  Parameters:
    `offer` - The type of rewrite being offered
  Throws:
    `XPathException`

### getInstructionNameCode

    public int getInstructionNameCode()

  Get the name of this instruction for diagnostic and tracing purposes (the string "xsl:result-document")

  Overrides:
    `getInstructionNameCode` in class `Instruction`
  Returns:
    a code identifying the instruction: typically but not always the fingerprint of a name in the XSLT namespace

### getItemType

    public ItemType getItemType(TypeHierarchy th)

  Get the item type of the items returned by evaluating this instruction

  Overrides:
    `getItemType` in class `Instruction`
  Parameters:
    `th` - the type hierarchy cache
  Returns:
    the static item type of the instruction. This is empty: the result-document instruction returns nothing.

### getSchemaType

    public SchemaType getSchemaType()

  Specified by:
    `getSchemaType` in interface `ValidatingInstruction`

### getValidationAction

    public int getValidationAction()

  Specified by:
    `getValidationAction` in interface `ValidatingInstruction`

### iterateSubExpressions

    public Iterator<Expression> iterateSubExpressions()

  Get all the XPath expressions associated with this instruction (in XSLT terms, the expression present on attributes of the instruction, as distinct from the child instructions in a sequence construction)

  Overrides:
    `iterateSubExpressions` in class `Expression`
  Returns:
    an iterator containing the sub-expressions of this expression

### replaceSubExpression

    public boolean replaceSubExpression(Expression original,
                                        Expression replacement)

  Replace one subexpression by a replacement subexpression

  Overrides:
    `replaceSubExpression` in class `Expression`
  Parameters:
    `original` - the original subexpression
    `replacement` - the replacement subexpression
  Returns:
    true if the original subexpression is found

### processLeavingTail

    public TailCall processLeavingTail(XPathContext context)
                                throws XPathException

  Description copied from class: `Instruction`
  ProcessLeavingTail: called to do the real work of this instruction. This method must be implemented in each subclass. The results of the instruction are written to the current Receiver, which can be obtained via the Controller.

  Specified by:
    `processLeavingTail` in interface `TailCallReturner`
  Specified by:
    `processLeavingTail` in class `Instruction`
  Parameters:
    `context` - The dynamic context of the transformation, giving access to the current node, the current variables, etc.
  Returns:
    null if the instruction has completed execution; or a TailCall indicating a function call or template call that is delegated to the caller, to be made after the stack has been unwound so as to save stack space.
  Throws:
    `XPathException` - if a dynamic error occurs during the evaluation of the instruction

### process

    public void process(Expression content,
                        XPathContext context)
                 throws XPathException

  Evaluation method designed for calling from compiled bytecode.

  Parameters:
    `content` - The content expression. When called from bytecode, this will be the compiled version of the interpreted content expression
    `context` - dynamic evaluation context
  Throws:
    `XPathException` - if a dynamic error occurs

### processLeft

    public void processLeft(Stack<XPathContext> contextStack,
                            Stack<Object> state)
                     throws XPathException

  In streaming mode, process the first half of the instruction (for example, to start a new document or element)

  Specified by:
    `processLeft` in interface `DivisibleInstruction`
  Parameters:
    `contextStack` - Stack of XPathContext objects. The instruction should use the one at the top of the stack. Some instructions (such as xsl:result-document) create a new context object and add it to the stack, removing it in the corresponding processRight() action.
    `state` - a stack on which the instruction can save state information during the call on processLeft()
  Throws:
    `XPathException` - if a dynamic error occurs

### processRight

    public void processRight(Stack<XPathContext> contextStack,
                             Stack<Object> state)
                      throws XPathException

  In streaming mode, process the right half of the instruction (for example, to end a new document or element)

  Specified by:
    `processRight` in interface `DivisibleInstruction`
  Parameters:
    `contextStack` - the stack of dynamic context objects
    `state` - a stack on which the instruction can save state information during the call on processLeft()
  Throws:
    `XPathException` - if a dynamic error occurs

### setSerializationProperty

    public static void setSerializationProperty(Properties details,
                                                String uri,
                                                String lname,
                                                String value,
                                                NamespaceResolver nsResolver,
                                                boolean prevalidated,
                                                Configuration config)
                                         throws XPathException

  Validate a serialization property and add its value to a Properties collection

  Parameters:
    `details` - the properties to be updated
    `uri` - the uri of the property name
    `lname` - the local part of the property name
    `value` - the value of the serialization property. In the case of QName-valued values, this will use lexical QNames if prevalidated is false and a NamespaceResolver is supplied; otherwise they will use Clark-format names
    `nsResolver` - resolver for lexical QNames; not needed if prevalidated, or if QNames are supplied in Clark format
    `prevalidated` - true if values are already known to be valid and lexical QNames have been expanded into Clark notation
    `config` - the Saxon configuration
  Throws:
    `XPathException` - if any serialization property has an invalid value

### explain

    public void explain(ExpressionPresenter out)

  Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.

  Specified by:
    `explain` in class `Expression`
  Parameters:
    `out` - the expression presenter used to display the structure

### processXslOutputElement

    public static void processXslOutputElement(NodeInfo element,
                                               Properties props,
                                               XPathContext c)
                                        throws XPathException

  Construct a set of output properties from an xsl:output element supplied at run-time

  Parameters:
    `element` - an xsl:output element
    `props` - Properties object to which will be added the values of those serialization properties that were specified
    `c` - the XPath dynamic context
  Throws:
    `XPathException` - if a dynamic error occurs

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