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## net.sf.saxon.instruct
Class ResultDocument

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

All Implemented Interfaces:
  Container, Expression, InstructionInfoProvider, java.io.Serializable, javax.xml.transform.SourceLocator, TailCallReturner

public class ResultDocument
extends Instruction

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.ComputedExpression
`locationId, staticProperties`

Fields inherited from interface net.sf.saxon.expr.Expression
`EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD`

Constructor Summary
`ResultDocument(java.util.Properties globalProperties, java.util.Properties localProperties, Expression href, Expression formatExpression, java.lang.String baseURI, int validationAction, SchemaType schemaType, IntHashMap serializationAttributes, NamespaceResolver nsResolver)`

Method Summary
`void` | `display(int level, NamePool pool, java.io.PrintStream out)` Diagnostic print of expression structure.
`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
`java.util.Iterator` | `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(Optimizer opt, StaticContext env, ItemType contextItemType)` Perform optimisation of an expression and its subexpressions.
`TailCall` | `processLeavingTail(XPathContext context)` ProcessLeavingTail: called to do the real work of this instruction.
`protected void` | `promoteInst(PromotionOffer offer)` Handle promotion offers, that is, non-local tree rewrites.
`void` | `setContent(Expression content)` Set the expression that constructs the content
`static void` | `setSerializationProperty(java.util.Properties details, java.lang.String uri, java.lang.String lname, java.lang.String value, NamespaceResolver nsResolver, boolean prevalidated, NameChecker checker)` Validate a serialization property and add its value to a Properties collection
`Expression` | `simplify(StaticContext env)` Simplify an expression.
`Expression` | `typeCheck(StaticContext env, ItemType contextItemType)` Perform type checking of an expression and its subexpressions.

Methods inherited from class net.sf.saxon.instruct.Instruction
`appendItem, assembleParams, assembleTunnelParams, computeCardinality, computeSpecialProperties, createsNewNodes, dynamicError, evaluateAsString, evaluateItem, getImplementationMethod, getInstructionInfo, getSourceLocator, isXSLT, iterate, process, promote`

Methods inherited from class net.sf.saxon.expr.ComputedExpression
`adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, dynamicError, effectiveBooleanValue, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, markTailFunctionCalls, resetStaticProperties, setLocationId, setParentExpression, suppressValidation, typeError, typeError`

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

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

Constructor Detail

### ResultDocument

    public ResultDocument(java.util.Properties globalProperties,
                          java.util.Properties localProperties,
                          Expression href,
                          Expression formatExpression,
                          java.lang.String baseURI,
                          int validationAction,
                          SchemaType schemaType,
                          IntHashMap serializationAttributes,
                          NamespaceResolver nsResolver)

Method Detail

### setContent

    public void setContent(Expression content)

  Set the expression that constructs the content

### simplify

    public Expression simplify(StaticContext env)
                        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 interface `Expression`
  Specified by:
    `simplify` in class `Instruction`
  Returns:
    the simplified expression
  Throws:
    `XPathException` - if an error is discovered during expression rewriting

### typeCheck

    public Expression typeCheck(StaticContext env,
                                ItemType contextItemType)
                         throws XPathException

  Description copied from interface: `Expression`
  Perform type checking of an expression and its subexpressions.

  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.

  Parameters:
    `env` - the static context of the expression
    `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`

### optimize

    public Expression optimize(Optimizer opt,
                               StaticContext env,
                               ItemType contextItemType)
                        throws XPathException

  Description copied from interface: `Expression`
  Perform optimisation of an expression and its subexpressions.

  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.

  Parameters:
    `opt` - the optimizer in use. This provides access to supporting functions; it also allows different optimization strategies to be used in different circumstances.
    `env` - the static context of the expression
    `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`

### getIntrinsicDependencies

    public int getIntrinsicDependencies()

  Description copied from class: `ComputedExpression`
  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 `ComputedExpression`
  Returns:
    a set of bit-significant flags identifying the "intrinsic" dependencies. The flags are documented in class net.sf.saxon.value.StaticProperty

### 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`

### getItemType

    public ItemType getItemType(TypeHierarchy th)

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

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

### iterateSubExpressions

    public java.util.Iterator 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)

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

### 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`

### setSerializationProperty

    public static void setSerializationProperty(java.util.Properties details,
                                                java.lang.String uri,
                                                java.lang.String lname,
                                                java.lang.String value,
                                                NamespaceResolver nsResolver,
                                                boolean prevalidated,
                                                NameChecker checker)
                                         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, Clark-format names otherwise
    `nsResolver` - resolver for lexical QNames; not needed if prevalidated
    `prevalidated` - true if values are already known to be valid and lexical QNames have been expanded into Clark notation
    `checker` -
  Throws:
    `XPathException`

### display

    public void display(int level,
                        NamePool pool,
                        java.io.PrintStream out)

  Diagnostic print of expression structure. The expression is written to the System.err output stream

  Parameters:
    `level` - indentation level for this expression
    `out` -
    `pool` - NamePool used to expand any names appearing in the expression

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