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openjdk / 21 / java.desktop / javax / swing / text / abstractdocument.branchelement.html

Class AbstractDocument.BranchElement

java.lang.Object
javax.swing.text.AbstractDocument.AbstractElement
javax.swing.text.AbstractDocument.BranchElement
All Implemented Interfaces:
Serializable, AttributeSet, Element, MutableAttributeSet, TreeNode
Direct Known Subclasses:
DefaultStyledDocument.SectionElement, HTMLDocument.BlockElement
Enclosing class:
AbstractDocument 
public class AbstractDocument.BranchElement extends AbstractDocument.AbstractElement
Implements a composite element that contains other elements.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans has been added to the java.beans package. Please see XMLEncoder.

Nested Class Summary

Nested classes/interfaces declared in interface javax.swing.text.AttributeSet

AttributeSet.CharacterAttribute, AttributeSet.ColorAttribute, AttributeSet.FontAttribute, AttributeSet.ParagraphAttribute

Field Summary

Fields declared in interface javax.swing.text.AttributeSet

NameAttribute, ResolveAttribute

Constructor Summary

Constructor Description
BranchElement(Element parent, AttributeSet a)
Constructs a composite element that initially contains no children.

Method Summary

Modifier and Type Method Description
Enumeration<TreeNode> children()
Returns the children of the receiver as an Enumeration.
boolean getAllowsChildren()
Returns true if the receiver allows children.
Element getElement(int index)
Gets a child element.
int getElementCount()
Gets the number of children for the element.
int getElementIndex(int offset)
Gets the child element index closest to the given model offset.
int getEndOffset()
Gets the ending offset in the model for the element.
String getName()
Gets the element name.
int getStartOffset()
Gets the starting offset in the model for the element.
boolean isLeaf()
Checks whether the element is a leaf.
Element positionToElement(int pos)
Gets the child element that contains the given model position.
void replace(int offset, int length, Element[] elems)
Replaces content with a new set of elements.
String toString()
Converts the element to a string.

Methods declared in class javax.swing.text.AbstractDocument.AbstractElement

addAttribute, addAttributes, containsAttribute, containsAttributes, copyAttributes, dump, getAttribute, getAttributeCount, getAttributeNames, getAttributes, getChildAt, getChildCount, getDocument, getIndex, getParent, getParentElement, getResolveParent, isDefined, isEqual, removeAttribute, removeAttributes, removeAttributes, setResolveParent

Methods declared in class java.lang.Object

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

Constructor Details

BranchElement

public BranchElement(Element parent, AttributeSet a)
Constructs a composite element that initially contains no children.
Parameters:
parent - The parent element
a - the attributes for the element
Since:
1.4

Method Details

positionToElement

public Element positionToElement(int pos)
Gets the child element that contains the given model position.
Parameters:
pos - the position >= 0
Returns:
the element, null if none

replace

public void replace(int offset, int length, Element[] elems)
Replaces content with a new set of elements.
Parameters:
offset - the starting offset >= 0
length - the length to replace >= 0
elems - the new elements

toString

public String toString()
Converts the element to a string.
Overrides:
toString in class Object
Returns:
the string

getName

public String getName()
Gets the element name.
Specified by:
getName in interface Element
Overrides:
getName in class AbstractDocument.AbstractElement
Returns:
the element name

getStartOffset

public int getStartOffset()
Gets the starting offset in the model for the element.
Specified by:
getStartOffset in interface Element
Specified by:
getStartOffset in class AbstractDocument.AbstractElement
Returns:
the offset >= 0
See Also:

getEndOffset

public int getEndOffset()
Gets the ending offset in the model for the element.
Specified by:
getEndOffset in interface Element
Specified by:
getEndOffset in class AbstractDocument.AbstractElement
Returns:
the offset >= 0
Throws:
NullPointerException - if this element has no children
See Also:

getElement

public Element getElement(int index)
Gets a child element.
Specified by:
getElement in interface Element
Specified by:
getElement in class AbstractDocument.AbstractElement
Parameters:
index - the child index, >= 0 && < getElementCount()
Returns:
the child element, null if none

getElementCount

public int getElementCount()
Gets the number of children for the element.
Specified by:
getElementCount in interface Element
Specified by:
getElementCount in class AbstractDocument.AbstractElement
Returns:
the number of children >= 0

getElementIndex

public int getElementIndex(int offset)
Gets the child element index closest to the given model offset.
Specified by:
getElementIndex in interface Element
Specified by:
getElementIndex in class AbstractDocument.AbstractElement
Parameters:
offset - the offset >= 0
Returns:
the element index >= 0

isLeaf

public boolean isLeaf()
Checks whether the element is a leaf.
Specified by:
isLeaf in interface Element
Specified by:
isLeaf in interface TreeNode
Specified by:
isLeaf in class AbstractDocument.AbstractElement
Returns:
true if a leaf

getAllowsChildren

public boolean getAllowsChildren()
Returns true if the receiver allows children.
Specified by:
getAllowsChildren in interface TreeNode
Specified by:
getAllowsChildren in class AbstractDocument.AbstractElement
Returns:
true if the receiver allows children, otherwise false

children

public Enumeration<TreeNode> children()
Returns the children of the receiver as an Enumeration.
Specified by:
children in interface TreeNode
Specified by:
children in class AbstractDocument.AbstractElement
Returns:
the children of the receiver

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/text/AbstractDocument.BranchElement.html