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## net.sf.saxon.instruct
Class Copy

    java.lang.Object
      net.sf.saxon.expr.ComputedExpression
          net.sf.saxon.instruct.Instruction
              net.sf.saxon.instruct.ParentNodeConstructor
                  net.sf.saxon.instruct.ElementCreator
                      net.sf.saxon.instruct.Copy

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

public class Copy
extends ElementCreator

Handler for xsl:copy elements in stylesheet.

See Also:
  Serialized Form

Field Summary

Fields inherited from class net.sf.saxon.instruct.ElementCreator
`inheritNamespaces`

Fields inherited from class net.sf.saxon.instruct.ParentNodeConstructor
`content`

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
`Copy(boolean copyNamespaces, boolean inheritNamespaces, SchemaType schemaType, int validation)`

Method Summary
`void` | `display(int level, NamePool pool, java.io.PrintStream out)` Diagnostic print of expression structure.
`Item` | `evaluateItem(XPathContext context)` Evaluate as an expression.
`int[]` | `getActiveNamespaces()` Callback to get a list of the intrinsic namespaces that need to be generated for the element.
`int` | `getInstructionNameCode()` Get the name of this instruction for diagnostic and tracing purposes
`ItemType` | `getItemType(TypeHierarchy th)` Get the item type of the result of this instruction.
`int` | `getNameCode(XPathContext context)` Callback from ElementCreator when constructing an element
`protected void` | `outputNamespaceNodes(XPathContext context, Receiver receiver)` Callback to output namespace nodes for the new element.
`TailCall` | `processLeavingTail(XPathContext context)` Evaluate the instruction to produce a new element node.

Methods inherited from class net.sf.saxon.instruct.ElementCreator
`computeSpecialProperties, getImplementationMethod, getValidationMode, setValidationMode, suppressValidation`

Methods inherited from class net.sf.saxon.instruct.ParentNodeConstructor
`createsNewNodes, getCardinality, getContentExpression, getSchemaType, getValidationAction, isLazyConstruction, isNamespaceSensitive, iterateSubExpressions, optimize, promoteInst, setContentExpression, setLazyConstruction, setSchemaType, simplify, typeCheck`

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

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

### Copy

    public Copy(boolean copyNamespaces,
                boolean inheritNamespaces,
                SchemaType schemaType,
                int validation)

Method Detail

### getInstructionNameCode

    public int getInstructionNameCode()

  Get the name of this instruction for diagnostic and tracing purposes

  Overrides:
    `getInstructionNameCode` in class `Instruction`

### getItemType

    public ItemType getItemType(TypeHierarchy th)

  Get the item type of the result of this instruction.

  Specified by:
    `getItemType` in interface `Expression`
  Overrides:
    `getItemType` in class `ElementCreator`
  Parameters:
    `th` -
  Returns:
    The context item type.

### getNameCode

    public int getNameCode(XPathContext context)
                    throws XPathException

  Callback from ElementCreator when constructing an element

  Specified by:
    `getNameCode` in class `ElementCreator`
  Parameters:
    `context` -
  Returns:
    the namecode of the element to be constructed
  Throws:
    `XPathException`

### outputNamespaceNodes

    protected void outputNamespaceNodes(XPathContext context,
                                        Receiver receiver)
                                 throws XPathException

  Callback to output namespace nodes for the new element.

  Specified by:
    `outputNamespaceNodes` in class `ElementCreator`
  Parameters:
    `context` - The execution context
    `receiver` - the Receiver where the namespace nodes are to be written
  Throws:
    `XPathException`

### getActiveNamespaces

    public int[] getActiveNamespaces()
                              throws XPathException

  Callback to get a list of the intrinsic namespaces that need to be generated for the element. The result is an array of namespace codes, the codes either occupy the whole array or are terminated by a -1 entry. A result of null is equivalent to a zero-length array.

  Overrides:
    `getActiveNamespaces` in class `ElementCreator`
  Throws:
    `XPathException`

### processLeavingTail

    public TailCall processLeavingTail(XPathContext context)
                                throws XPathException

  Description copied from class: `ElementCreator`
  Evaluate the instruction to produce a new element node. This method is typically used when there is a parent element or document in a result tree, to which the new element is added.

  Specified by:
    `processLeavingTail` in interface `TailCallReturner`
  Overrides:
    `processLeavingTail` in class `ElementCreator`
  Parameters:
    `context` -
  Returns:
    null (this instruction never returns a tail call)
  Throws:
    `XPathException`

### evaluateItem

    public Item evaluateItem(XPathContext context)
                      throws XPathException

  Evaluate as an expression. We rely on the fact that when these instructions are generated by XQuery, there will always be a valueExpression to evaluate the content

  Specified by:
    `evaluateItem` in interface `Expression`
  Overrides:
    `evaluateItem` in class `ElementCreator`
  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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