com.itextpdf.layout.element

Class AbstractElement<T extends IElement>

java.lang.Object

com.itextpdf.layout.ElementPropertyContainer<T>

com.itextpdf.layout.element.AbstractElement<T>

Type Parameters:

T - the type of the implementation

All Implemented Interfaces:

IElement, IPropertyContainer

Direct Known Subclasses:

AreaBreak, BlockElement, Image, Tab, Text

public abstract class AbstractElement<T extends IElement>
extends ElementPropertyContainer<T>
implements IElement

Defines the most common properties that most IElement implementations share.

Field Summary

Fields

Modifier and Type	Field and Description
protected List<IElement>	childElements
protected IRenderer	nextRenderer
protected Set<Style>	styles

Fields inherited from class com.itextpdf.layout.ElementPropertyContainer

properties

Constructor Summary

Constructors

Constructor and Description
AbstractElement()

Method Summary

Modifier and Type	Method and Description
T	addStyle(Style style) Add a new style to this element.
IRenderer	createRendererSubTree() Creates a renderer subtree with root in the current element.
List<IElement>	getChildren() Gets the child elements of this elements
<T1> T1	getProperty(int property) Gets the property from this entity.
IRenderer	getRenderer() Gets a renderer for this element.
boolean	hasProperty(int property) Checks if this entity has the specified property.
boolean	isEmpty() Returns true if this list contains no elements.
protected abstract IRenderer	makeNewRenderer()
T	setAction(PdfAction action) Sets an action on this Element.
void	setNextRenderer(IRenderer renderer) Overrides the IRenderer instance which will be returned by the next call to the IElement.getRenderer().
T	setPageNumber(int pageNumber) Explicitly sets the page number this element should be put on.

Methods inherited from class com.itextpdf.layout.ElementPropertyContainer

deleteOwnProperty, getDefaultProperty, getOwnProperty, getSplitCharacters, getStrokeColor, getStrokeWidth, getTextRenderingMode, hasOwnProperty, setBackgroundColor, setBackgroundColor, setBackgroundColor, setBackgroundColor, setBackgroundImage, setBackgroundImage, setBaseDirection, setBold, setBorder, setBorderBottom, setBorderBottomLeftRadius, setBorderBottomRightRadius, setBorderLeft, setBorderRadius, setBorderRight, setBorderTop, setBorderTopLeftRadius, setBorderTopRightRadius, setCharacterSpacing, setDestination, setFixedPosition, setFixedPosition, setFixedPosition, setFixedPosition, setFont, setFont, setFontColor, setFontColor, setFontFamily, setFontFamily, setFontKerning, setFontScript, setFontSize, setHorizontalAlignment, setHyphenation, setItalic, setLineThrough, setOpacity, setProperty, setRelativePosition, setSplitCharacters, setStrokeColor, setStrokeWidth, setTextAlignment, setTextRenderingMode, setUnderline, setUnderline, setUnderline, setUnderline, setWordSpacing

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.itextpdf.layout.IPropertyContainer

deleteOwnProperty, getDefaultProperty, getOwnProperty, hasOwnProperty, setProperty

Field Detail

nextRenderer

protected IRenderer nextRenderer

childElements

protected List<IElement> childElements

styles

protected Set<Style> styles

Constructor Detail

AbstractElement

public AbstractElement()

Method Detail

getRenderer

public IRenderer getRenderer()

Description copied from interface: IElement

Gets a renderer for this element. Note that this method can be called more than once. By default each element should define its own renderer, but the renderer can be overridden by IElement.setNextRenderer(IRenderer) method call.

Specified by:

getRenderer in interface IElement

Returns:

a renderer for this element

setNextRenderer

public void setNextRenderer(IRenderer renderer)

Description copied from interface: IElement

Overrides the IRenderer instance which will be returned by the next call to the IElement.getRenderer().

Specified by:

setNextRenderer in interface IElement

Parameters:

renderer - the renderer instance

createRendererSubTree

public IRenderer createRendererSubTree()

Description copied from interface: IElement

Creates a renderer subtree with root in the current element. Compared to IElement.getRenderer(), the renderer returned by this method should contain all the child renderers for children of the current element.

Specified by:

createRendererSubTree in interface IElement

Returns:

a renderer subtree for this element

hasProperty

public boolean hasProperty(int property)

Description copied from interface: IPropertyContainer

Checks if this entity has the specified property. Compared to IPropertyContainer.hasOwnProperty(int), this method can check parent's properties, styles, etc, depending on the origin of the instance

Specified by:

hasProperty in interface IPropertyContainer

Overrides:

hasProperty in class ElementPropertyContainer<T extends IElement>

Parameters:

property - the property to be checked

Returns:

true if this instance has given property, false otherwise

getProperty

public <T1> T1 getProperty(int property)

Description copied from interface: IPropertyContainer

Gets the property from this entity. Compared to IPropertyContainer.getOwnProperty(int), this method can check parent's properties, styles, etc, depending on the origin of the instance

Specified by:

getProperty in interface IPropertyContainer

Overrides:

getProperty in class ElementPropertyContainer<T extends IElement>

Type Parameters:

T1 - the return type associated with the property

Parameters:

property - the property to be retrieved

Returns:

the value of the given property. null will be returned if the property value was not found

addStyle

public T addStyle(Style style)

Add a new style to this element. A style can be used as an effective way to define multiple equal properties to several elements, however its properties have lower priority than properties, directly set on ElementPropertyContainer Note that if several Style objects are added, iText checks them one by one in the order in which they were added and returns the property's value from the last Style object, which contains this property. So, if there are two Style objects added: the first has set width of 100 points and the second of 200 points, iText will get 200 points as width value.

Parameters:

style - the style to be added

Returns:

this element

getChildren

public List<IElement> getChildren()

Gets the child elements of this elements

Returns:

a list of children

isEmpty

public boolean isEmpty()

Returns true if this list contains no elements.

Returns:

true if this list contains no elements

setAction

public T setAction(PdfAction action)

Sets an action on this Element. An action is a general PDF concept that signifies anything that makes the document interactive, e.g. a hyperlink or a button.

Parameters:

action - the PdfAction that should be performed

Returns:

this Element

setPageNumber

public T setPageNumber(int pageNumber)

Explicitly sets the page number this element should be put on. The location on the page will be the same as if it were added at the end of the document, but it will be located on the specified page.

This method should be used very carefully in client code.

Parameters:

pageNumber - the page number of the page this element should be placed on

Returns:

this Element

makeNewRenderer

protected abstract IRenderer makeNewRenderer()