ConstraintChecker

java.lang.Object
- net.sf.saxon.event.SequenceReceiver
- - com.saxonica.ee.stream.watch.WatchManager
  - - com.saxonica.ee.validate.ConstraintChecker

All Implemented Interfaces:

javax.xml.transform.Result, Receiver, NamespaceResolver
```
public class ConstraintChecker
extends WatchManager
```
This class handles the checking of Schema-defined unique, key, and keyref constraints. It keeps track of the nesting of elements, and notifies a Watcher class when an element is found that matches a particular Selector.

Nested Class Summary
- Nested classes/interfaces inherited from class com.saxonica.ee.stream.watch.WatchManager
  WatchManager.ClosedownAction, WatchManager.GroupingScope

Field Summary
- Fields inherited from class com.saxonica.ee.stream.watch.WatchManager
  activeWatchStack, elementStackTop, watchList
- Fields inherited from class net.sf.saxon.event.SequenceReceiver
  pipelineConfiguration, previousAtomic, systemId
- Fields inherited from interface javax.xml.transform.Result
  PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING

Constructor Summary

Constructors
Constructor Description

ConstraintChecker(PipelineConfiguration pipe)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`addPrearrangedWatches()`
`ValidationContext`	`getValidationContext()`
`void`	`setElementDeclaration(ElementDecl decl)`	setElementDeclaration is called immediately before the call on startElement.
`void`	`setPipelineConfiguration(PipelineConfiguration pipe)`	Set the pipeline configuration
`void`	`setValidationContext(ValidationContext vc)`

Methods inherited from class com.saxonica.ee.stream.watch.WatchManager
addWatch, allowsEarlyExit, append, characters, close, comment, endDocument, endElement, endGroupingScope, getCurrentEventNumber, getCurrentNode, getDepth, getDocumentNode, getMultiAccumulatorWatch, getOutputter, getURIForPrefix, getXPathContext, iteratePrefixes, processingInstruction, removeWatch, restartElement, setOutputter, setUnparsedEntity, setXPathContext, startCapturingGroupingWatches, startDocument, startElement, startGroupingScope, stopCapturingGroupingWatches, usesTypeAnnotations, watchAccumulators

Methods inherited from class net.sf.saxon.event.SequenceReceiver
append, decompose, flatten, getConfiguration, getErrorCodeForDecomposingFunctionItems, getNamePool, getPipelineConfiguration, getSystemId, handlesAppend, open, setSystemId

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

- Constructor Detail
  - ConstraintChecker
```
public ConstraintChecker(PipelineConfiguration pipe)
```
- Method Detail
  - setValidationContext
```
public void setValidationContext(ValidationContext vc)
```
  - getValidationContext
```
public ValidationContext getValidationContext()
```
  - setPipelineConfiguration
```
public void setPipelineConfiguration(PipelineConfiguration pipe)
```
    Description copied from interface: Receiver
    
    Set the pipeline configuration
    
    Specified by:
    
    setPipelineConfiguration in interface Receiver
    
    Overrides:
    
    setPipelineConfiguration in class SequenceReceiver
    
    Parameters:
    
    pipe - the pipeline configuration
  - setElementDeclaration
```
public void setElementDeclaration(ElementDecl decl)
                           throws XPathException
```
    setElementDeclaration is called immediately before the call on startElement. It identifies the element declaration that defines the just-started element, which in turn is used to create a Watch for constraints originating at this element.
    
    Parameters:
    
    decl - the element declaration
    
    Throws:
    
    XPathException - if an error occurs
  - addPrearrangedWatches
```
protected void addPrearrangedWatches()
                              throws XPathException
```
    Overrides:
    
    addPrearrangedWatches in class WatchManager
    
    Throws:
    
    XPathException