AtomicMappingExpression

java.lang.Object
- net.sf.saxon.expr.Expression
- - net.sf.saxon.expr.SlashExpression
  - - net.sf.saxon.expr.AtomicMappingExpression

All Implemented Interfaces:

java.io.Serializable, javax.xml.transform.SourceLocator, LocationProvider, SaxonLocator, ContextMappingFunction, EvaluableItem, SequenceIterable, InstructionInfo, org.xml.sax.Locator
```
public final class AtomicMappingExpression
extends SlashExpression
implements ContextMappingFunction
```
An atomic mapping expression is a slash expression A/B where B has a static type that is an atomic type. For example, * / name().

See Also:

Serialized Form

Field Summary
- Fields inherited from class net.sf.saxon.expr.Expression
  EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties

Constructor Summary

Constructors
Constructor Description

AtomicMappingExpression(Expression start, Expression step)
Constructor

Constructors
Constructor	Description
`AtomicMappingExpression(Expression start, Expression step)`	Constructor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Expression`	`copy()`	Copy an expression.
`void`	`explain(ExpressionPresenter destination)`	Diagnostic print of expression structure.
`boolean`	`isHybrid()`	Determine whether this expression is capable (as far as static analysis is concerned) of returning a mixture of nodes and atomic values.
`SequenceIterator`	`iterate(XPathContext context)`	Iterate the path-expression in a given context
`Expression`	`typeCheck(ExpressionVisitor visitor, ItemType contextItemType)`	Type-check the expression

Methods inherited from interface net.sf.saxon.expr.ContextMappingFunction
map

Methods inherited from class net.sf.saxon.expr.Expression
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeStaticProperties, display, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluateItem, evaluatePendingUpdates, explain, findParentOf, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, implementsStaticTypeCheck, isUpdatingExpression, iterateEvents, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toString, typeError

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

Methods inherited from class net.sf.saxon.expr.SlashExpression
computeCardinality, computeDependencies, computeSpecialProperties, equals, getItemType, getStartExpression, getStepExpression, hashCode, hasLoopingSubexpression, iterateSubExpressions, makeSlashExpression, map, optimize, promote, promoteFocusIndependentSubexpressions, replaceSubExpression, setStartExpression, setStepExpression, simplify

- Constructor Detail
  - AtomicMappingExpression
```
public AtomicMappingExpression(Expression start,
                               Expression step)
```
    Constructor
    
    Parameters:
    
    start - A node-set expression denoting the absolute or relative set of nodes from which the navigation path should start.
    
    step - The step to be followed from each node in the start expression to yield a new node-set
- Method Detail
  - isHybrid
```
public boolean isHybrid()
```
    Determine whether this expression is capable (as far as static analysis is concerned) of returning a mixture of nodes and atomic values. If so, this needs to be prevented at run time
    
    Overrides:
    
    isHybrid in class SlashExpression
    
    Returns:
    
    true if the static type allows both nodes and atomic values
  - typeCheck
```
public Expression typeCheck(ExpressionVisitor visitor,
                            ItemType contextItemType)
```
    Type-check the expression
    
    Overrides:
    
    typeCheck in class SlashExpression
    
    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
  - copy
```
public Expression copy()
```
    Copy an expression. This makes a deep copy.
    
    Overrides:
    
    copy in class SlashExpression
    
    Returns:
    
    the copy of the original expression
  - iterate
```
public SequenceIterator iterate(XPathContext context)
                         throws XPathException
```
    Iterate the path-expression in a given context
    
    Specified by:
    
    iterate in interface SequenceIterable
    
    Overrides:
    
    iterate in class SlashExpression
    
    Parameters:
    
    context - the evaluation context
    
    Returns:
    
    a SequenceIterator that can be used to iterate over the result of the expression
    
    Throws:
    
    XPathException - if any dynamic error occurs evaluating the expression
  - explain
```
public void explain(ExpressionPresenter destination)
```
    Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.
    
    Overrides:
    
    explain in class SlashExpression
    
    Parameters:
    
    destination - the expression presenter used to display the structure

Class AtomicMappingExpression

Field Summary

Fields inherited from class net.sf.saxon.expr.Expression

Constructor Summary

Method Summary

Methods inherited from interface net.sf.saxon.expr.ContextMappingFunction

Methods inherited from class net.sf.saxon.expr.Expression

Methods inherited from class java.lang.Object

Methods inherited from class net.sf.saxon.expr.SlashExpression

Constructor Detail

AtomicMappingExpression

Method Detail

isHybrid

typeCheck

copy

iterate

explain