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java.lang.Objectjavax.swing.text.html.parser.ContentModel
public final class ContentModel
A representation of the element content. The instances of this class can be arranged into the linked list, representing a BNF expression. The content model is constructed as a branched tree structure in the following way:
a = new ContentModel('+', A, null); // a reprensents A+ b = new ContentModel('&', B, a); // b represents B & A+ c = new ContentModel('*', b, null); // c represents ( B & A+) * d = new ContentModel('|', new ContentModel('*', A, null), new ContentModel('?', B, null)); // d represents ( A* | B? )where the valid operations are:
E*
E occurs zero or more timesE+
E occurs one or more timesE?
E occurs once or not atl allA,B
A occurs before BA|B
both A and B are permitted in any order.
The '|' alone does not permit the repetetive occurence of A or B
(use (A|B)*
.A&B
both A and B must occur once (in any order)
Field Summary | |
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Object |
content
The document content, containing either Element or the enclosed content model (that would be in the parentheses in BNF expression). |
ContentModel |
next
The next content model model ( = pointer to the next element of the linked list) for the binary expression (',','&' or '|'). |
int |
type
Specifies the BNF operation between this node and the node, stored in the field next (or for this node, if it is
an unary operation. |
Constructor Summary | |
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ContentModel()
Create a content model initializing all fields to default values. |
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ContentModel(Element a_content)
Create a content model, consisting of the single element. |
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ContentModel(int a_type,
ContentModel a_content)
Create a content model, involving expression of the given type. |
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ContentModel(int a_type,
Object a_content,
ContentModel a_next)
Create a content model, involving binary expression of the given type. |
Method Summary | |
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boolean |
empty()
Checks if the content model matches an empty input stream. |
Element |
first()
Get the element, stored in the next.content . |
boolean |
first(Object token)
Checks if this object can potentially be the first token in the ContenModel list. |
void |
getElements(Vector<Element> elements)
Adds all list elements to the given vector, ignoring the operations between the elements. |
String |
toString()
Returns a string representation (an expression) of this content model. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public ContentModel next
public Object content
public int type
next
(or for this node, if it is
an unary operation.
Constructor Detail |
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public ContentModel()
public ContentModel(Element a_content)
a = new ContentModel('+', A, null); // a reprensents A+
b = new ContentModel('&', B, a); // b represents B & A+
c = new ContentModel('*', b, null); // c represents ( B & A+) *
d = new ContentModel('|', A,
new ContentModel('?',b, null);
// d represents
public ContentModel(int a_type, ContentModel a_content)
a_type
- The expression operation type ('*','?' or '+'a_content
- The content for that the expression is applied.public ContentModel(int a_type, Object a_content, ContentModel a_next)
a_type
- The expression operation type ( ',', '|' or '&').a_content
- The content of the left part of the expression.a_next
- The content model, representing the right part of the
expression.Method Detail |
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public void getElements(Vector<Element> elements)
elements
- - a vector to add the values to.public boolean empty()
public Element first()
next.content
.
The method is programmed as the part of the standard API, but not
used in this implementation.
next
.public boolean first(Object token)
public String toString()
toString
in class Object
Object.getClass()
,
Object.hashCode()
,
Class.getName()
,
Integer.toHexString(int)
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