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java.lang.Objectorg.xml.sax.helpers.DefaultHandler
uk.ac.starlink.vo.TableSetSaxHandler
public class TableSetSaxHandler
Parses an XML document which describes Tabular Data as prescribed by the VODataService standard. It will pick up <table> elements (of type vs:Table), or elements that look like them, to build a picture of the tables and their columns and foreign keys. XML documents of this type are exposed by VOSI and TAP services.
The easiest way to make use of this class is via the static method
readTableSet(java.net.URL)
or the convenience main(java.lang.String[])
method.
Constructor Summary | |
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TableSetSaxHandler()
Constructor. |
Method Summary | |
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void |
characters(char[] ch,
int start,
int length)
|
void |
endDocument()
|
void |
endElement(String uri,
String localName,
String qName)
|
void |
endPrefixMapping(String prefix)
|
SchemaMeta[] |
getSchemas()
Returns the array of schema metadata objects which have been read by this parser. |
void |
ignorableWhitespace(char[] ch,
int start,
int length)
|
static void |
main(String[] args)
Main method to parse a tableset from the command line. |
void |
processingInstruction(String target,
String data)
|
static SchemaMeta[] |
readTableSet(URL url)
Uses an instance of this class to read an XML document from a given URL and extract the TableMeta objects from it. |
void |
setDocumentLocator(Locator locator)
|
void |
skippedEntity(String name)
|
void |
startDocument()
|
void |
startElement(String uri,
String localName,
String qName,
Attributes atts)
|
void |
startPrefixMapping(String prefix,
String uri)
|
Methods inherited from class org.xml.sax.helpers.DefaultHandler |
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error, fatalError, notationDecl, resolveEntity, unparsedEntityDecl, warning |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public TableSetSaxHandler()
Method Detail |
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public SchemaMeta[] getSchemas()
public void startDocument()
startDocument
in interface ContentHandler
startDocument
in class DefaultHandler
public void endDocument()
endDocument
in interface ContentHandler
endDocument
in class DefaultHandler
public void startElement(String uri, String localName, String qName, Attributes atts)
startElement
in interface ContentHandler
startElement
in class DefaultHandler
public void endElement(String uri, String localName, String qName)
endElement
in interface ContentHandler
endElement
in class DefaultHandler
public void characters(char[] ch, int start, int length)
characters
in interface ContentHandler
characters
in class DefaultHandler
public void ignorableWhitespace(char[] ch, int start, int length)
ignorableWhitespace
in interface ContentHandler
ignorableWhitespace
in class DefaultHandler
public void startPrefixMapping(String prefix, String uri)
startPrefixMapping
in interface ContentHandler
startPrefixMapping
in class DefaultHandler
public void endPrefixMapping(String prefix)
endPrefixMapping
in interface ContentHandler
endPrefixMapping
in class DefaultHandler
public void processingInstruction(String target, String data)
processingInstruction
in interface ContentHandler
processingInstruction
in class DefaultHandler
public void skippedEntity(String name)
skippedEntity
in interface ContentHandler
skippedEntity
in class DefaultHandler
public void setDocumentLocator(Locator locator)
setDocumentLocator
in interface ContentHandler
setDocumentLocator
in class DefaultHandler
public static SchemaMeta[] readTableSet(URL url) throws IOException, SAXException
url
- containing a TableSet document or similar
IOException
SAXException
public static void main(String[] args) throws IOException, SAXException
args
- first element is a URL to read from
IOException
SAXException
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