org.openqa.jetty.html

Class Composite

java.lang.Object

org.openqa.jetty.html.Element

org.openqa.jetty.html.Composite

Direct Known Subclasses:

Block, Comment, Page, Text

public class Composite
extends Element

HTML Composite Element.

This class is can be used a either an abstract or concrete holder of other HTML elements. Used directly, it allow multiple HTML Elements to be added which are produced sequentially. Derived used of Composite may wrap each contain Element in special purpose HTML tags (e.g. list).

Notes
Elements are added to the Composite either as HTML Elements or as Strings. Other objects added to the Composite are converted to Strings

Version:

$Id: Composite.java,v 1.6 2004/05/09 20:31:28 gregwilkins Exp $

Author:

Greg Wilkins

See Also:

Element

Field Summary

Fields

Modifier and Type	Field and Description
protected ArrayList	elements The vector of elements in this Composite.
protected Composite	nest

Fields inherited from class org.openqa.jetty.html.Element

ALIGN, attributeMap, BGCOLOR, BOTTOM, CENTER, CLASS, COLOR, HEIGHT, ID, LEFT, MIDDLE, noAttributes, RIGHT, SIZE, STYLE, TOP, VALIGN, WIDTH

Constructor Summary

Constructors

Constructor and Description
Composite() Default constructor.
Composite(String attributes) Default constructor.

Method Summary

Methods

Modifier and Type	Method and Description
Composite	add(Object o) Add an Object to the Composite by converting it to a Element or.
String	contents() Contents of the composite.
Composite	nest(Composite c) Nest a Composite within a Composite.
boolean	replace(Object oldObj, Object newObj) Replace an object within the composite.
Composite	reset() Empty the contents of this Composite .
Composite	setNest(Composite c) Explicit set of the Nested component.
int	size() The number of Elements in this Composite.
Composite	unnest() Recursively unnest the composites.
void	write(Writer out) Write the composite.

Methods inherited from class org.openqa.jetty.html.Element

attribute, attribute, attribute, attributes, attributes, bgColor, bottom, center, color, cssClass, cssID, height, height, height, left, middle, right, setAttributesFrom, size, size, style, top, toString, width, width, width, write, write

Methods inherited from class java.lang.Object

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

Field Detail

elements

protected ArrayList elements

The vector of elements in this Composite.

nest

protected Composite nest

Constructor Detail

Composite

public Composite()

Default constructor.

Composite

public Composite(String attributes)

Default constructor.

Method Detail

add

public Composite add(Object o)

Add an Object to the Composite by converting it to a Element or. String

Parameters:

o - The Object to add. If it is a String or Element, it is added directly, otherwise toString() is called.

Returns:

This Composite (for chained commands)

nest

public Composite nest(Composite c)

Nest a Composite within a Composite. The passed Composite is added to this Composite. Adds to this composite are actually added to the nested Composite. Calls to nest are passed the nested Composite

Returns:

The Composite to unest on to return to the original state.

setNest

public Composite setNest(Composite c)

Explicit set of the Nested component. No add is performed. setNest() obeys any current nesting and sets the nesting of the nested component.

unnest

public Composite unnest()

Recursively unnest the composites.

size

public int size()

The number of Elements in this Composite.

Overrides:

size in class Element

Returns:

The number of elements in this Composite

write

public void write(Writer out)
           throws IOException

Write the composite. The default implementation writes the elements sequentially. May be overridden for more specialized behaviour.

Specified by:

write in class Element

Parameters:

out - Writer to write the element to.

Throws:

IOException

contents

public String contents()

Contents of the composite.

reset

public Composite reset()

Empty the contents of this Composite .

replace

public boolean replace(Object oldObj,
              Object newObj)

Replace an object within the composite.