Package org.htmlparser
Interface NodeFactory
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- All Known Implementing Classes:
Lexer
,PrototypicalNodeFactory
public interface NodeFactory
This interface defines the methods needed to create new nodes.The factory is used when lexing to generate the nodes passed back to the caller. By implementing this interface, and setting that concrete object as the node factory for the
lexer
(perhaps via theparser
), the way that nodes are generated can be customized.In general, replacing the factory with a custom factory is not required because of the flexibility of the
PrototypicalNodeFactory
.Creation of Text and Remark nodes is straight forward, because essentially they are just sequences of characters extracted from the page. Creation of a Tag node requires that the attributes from the tag be remembered as well.
- See Also:
PrototypicalNodeFactory
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description Remark
createRemarkNode(Page page, int start, int end)
Create a new remark node.Text
createStringNode(Page page, int start, int end)
Create a new text node.Tag
createTagNode(Page page, int start, int end, java.util.Vector attributes)
Create a new tag node.
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Method Detail
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createStringNode
Text createStringNode(Page page, int start, int end) throws ParserException
Create a new text node.- Parameters:
page
- The page the node is on.start
- The beginning position of the string.end
- The ending positiong of the string.- Returns:
- A text node comprising the indicated characters from the page.
- Throws:
ParserException
- If there is a problem encountered when creating the node.
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createRemarkNode
Remark createRemarkNode(Page page, int start, int end) throws ParserException
Create a new remark node.- Parameters:
page
- The page the node is on.start
- The beginning position of the remark.end
- The ending positiong of the remark.- Returns:
- A remark node comprising the indicated characters from the page.
- Throws:
ParserException
- If there is a problem encountered when creating the node.
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createTagNode
Tag createTagNode(Page page, int start, int end, java.util.Vector attributes) throws ParserException
Create a new tag node. Note that the attributes vector contains at least one element, which is the tag name (standalone attribute) at position zero. This can be used to decide which type of node to create, or gate other processing that may be appropriate.- Parameters:
page
- The page the node is on.start
- The beginning position of the tag.end
- The ending positiong of the tag.attributes
- The attributes contained in this tag.- Returns:
- A tag node comprising the indicated characters from the page.
- Throws:
ParserException
- If there is a problem encountered when creating the node.
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