PdfUA1HeadingsChecker

java.lang.Object
- com.itextpdf.pdfua.checkers.utils.ua1.PdfUA1HeadingsChecker

```
public final class PdfUA1HeadingsChecker
extends java.lang.Object
```
Utility class which performs headings check according to PDF/UA-1 specification.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class PdfUA1HeadingsChecker.PdfUA1HeadingHandler
Handler class that checks heading tags while traversing the tag tree.

Field Summary

Fields
Modifier and Type	Field	Description
`private PdfUAValidationContext`	`context`
`private static java.util.regex.Pattern`	`Hn_PATTERN`
`private java.util.Set<PdfDictionary>`	`hPdfDictParents`
`private java.util.Set<IRenderer>`	`hRendererParents`
`private int`	`previousHn`
`private boolean`	`wasAtLeastOneH`

Constructor Summary

Constructors
Constructor Description

PdfUA1HeadingsChecker(PdfUAValidationContext context)
Creates a new instance of PdfUA1HeadingsChecker.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private void`	`checkHAndHnUsing(java.lang.String role)`
`private void`	`checkHnSequence(java.lang.String role)`
`void`	`checkLayoutElement(IRenderer renderer)`	Checks if layout element has correct heading.
`void`	`checkStructElement(IStructureNode structNode)`	Checks if structure element has correct heading.
`private static int`	`extractNumber(java.lang.String heading)`
`private static PdfDictionary`	`extractPdfDictFromNode(IStructureNode node)`

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

Field Detail

Hn_PATTERN

private static final java.util.regex.Pattern Hn_PATTERN

context

private final PdfUAValidationContext context

hRendererParents

private final java.util.Set<IRenderer> hRendererParents

hPdfDictParents

private final java.util.Set<PdfDictionary> hPdfDictParents

previousHn
```
private int previousHn
```

wasAtLeastOneH
```
private boolean wasAtLeastOneH
```

Constructor Detail
- PdfUA1HeadingsChecker
```
public PdfUA1HeadingsChecker(PdfUAValidationContext context)
```
  Creates a new instance of PdfUA1HeadingsChecker.
  
  Parameters:
  
  context - the validation context

Method Detail
- checkLayoutElement
```
public void checkLayoutElement(IRenderer renderer)
```
  Checks if layout element has correct heading.
  
  Parameters:
  
  renderer - layout element to check
  
  Throws:
  
  PdfUAConformanceException - if headings sequence is incorrect
- checkStructElement
```
public void checkStructElement(IStructureNode structNode)
```
  Checks if structure element has correct heading.
  
  Parameters:
  
  structNode - structure element to check
  
  Throws:
  
  PdfUAConformanceException - if headings sequence is incorrect
- checkHnSequence
```
private void checkHnSequence(java.lang.String role)
```
- checkHAndHnUsing
```
private void checkHAndHnUsing(java.lang.String role)
```
- extractNumber
```
private static int extractNumber(java.lang.String heading)
```
- extractPdfDictFromNode
```
private static PdfDictionary extractPdfDictFromNode(IStructureNode node)
```