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// XCatalogReader.java - Read XML Catalog files
package com.sun.org.apache.xml.internal.resolver.readers;
import java.util.Vector;
import com.sun.org.apache.xml.internal.resolver.Catalog;
import com.sun.org.apache.xml.internal.resolver.CatalogEntry;
import com.sun.org.apache.xml.internal.resolver.CatalogException;
import com.sun.org.apache.xml.internal.resolver.helpers.PublicId;
import org.xml.sax.*;
import javax.xml.parsers.*;
/**
* Parse "xcatalog" XML Catalog files, this is the XML Catalog format
* developed by John Cowan and supported by Apache.
*
* @see Catalog
*
* @author Norman Walsh
* [email protected]
*
* @version 1.0
*/
public class XCatalogReader extends SAXCatalogReader implements SAXCatalogParser {
/** The catalog object needs to be stored by the object so that
* SAX callbacks can use it.
*/
protected Catalog catalog = null;
/** Set the current catalog. */
public void setCatalog (Catalog catalog) {
this.catalog = catalog;
}
/** Get the current catalog. */
public Catalog getCatalog () {
return catalog;
}
/** The constructor */
public XCatalogReader(SAXParserFactory parserFactory) {
super(parserFactory);
}
// ----------------------------------------------------------------------
// Implement the SAX DocumentHandler interface
/** The SAX setDocumentLocator method does nothing. */
public void setDocumentLocator (Locator locator) {
return;
}
/** The SAX startDocument method does nothing. */
public void startDocument ()
throws SAXException {
return;
}
/** The SAX endDocument method does nothing. */
public void endDocument ()
throws SAXException {
return;
}
/**
* The SAX startElement method recognizes elements
* from the plain catalog format and instantiates CatalogEntry
* objects for them.
*
* @param namespaceURI The namespace name of the element.
* @param localName The local name of the element.
* @param qName The QName of the element.
* @param atts The list of attributes on the element.
*
* @see CatalogEntry
*/
public void startElement (String namespaceURI,
String localName,
String qName,
Attributes atts)
throws SAXException {
int entryType = -1;
Vector entryArgs = new Vector();
if (localName.equals("Base")) {
entryType = catalog.BASE;
entryArgs.add(atts.getValue("HRef"));
catalog.getCatalogManager().debug.message(4, "Base", atts.getValue("HRef"));
} else if (localName.equals("Delegate")) {
entryType = catalog.DELEGATE_PUBLIC;
entryArgs.add(atts.getValue("PublicId"));
entryArgs.add(atts.getValue("HRef"));
catalog.getCatalogManager().debug.message(4, "Delegate",
PublicId.normalize(atts.getValue("PublicId")),
atts.getValue("HRef"));
} else if (localName.equals("Extend")) {
entryType = catalog.CATALOG;
entryArgs.add(atts.getValue("HRef"));
catalog.getCatalogManager().debug.message(4, "Extend", atts.getValue("HRef"));
} else if (localName.equals("Map")) {
entryType = catalog.PUBLIC;
entryArgs.add(atts.getValue("PublicId"));
entryArgs.add(atts.getValue("HRef"));
catalog.getCatalogManager().debug.message(4, "Map",
PublicId.normalize(atts.getValue("PublicId")),
atts.getValue("HRef"));
} else if (localName.equals("Remap")) {
entryType = catalog.SYSTEM;
entryArgs.add(atts.getValue("SystemId"));
entryArgs.add(atts.getValue("HRef"));
catalog.getCatalogManager().debug.message(4, "Remap",
atts.getValue("SystemId"),
atts.getValue("HRef"));
} else if (localName.equals("XMLCatalog")) {
// nop, start of catalog
} else {
// This is equivalent to an invalid catalog entry type
catalog.getCatalogManager().debug.message(1, "Invalid catalog entry type", localName);
}
if (entryType >= 0) {
try {
CatalogEntry ce = new CatalogEntry(entryType, entryArgs);
catalog.addEntry(ce);
} catch (CatalogException cex) {
if (cex.getExceptionType() == CatalogException.INVALID_ENTRY_TYPE) {
catalog.getCatalogManager().debug.message(1, "Invalid catalog entry type", localName);
} else if (cex.getExceptionType() == CatalogException.INVALID_ENTRY) {
catalog.getCatalogManager().debug.message(1, "Invalid catalog entry", localName);
}
}
}
}
/** The SAX endElement method does nothing. */
public void endElement (String namespaceURI,
String localName,
String qName)
throws SAXException {
return;
}
/** The SAX characters method does nothing. */
public void characters (char ch[], int start, int length)
throws SAXException {
return;
}
/** The SAX ignorableWhitespace method does nothing. */
public void ignorableWhitespace (char ch[], int start, int length)
throws SAXException {
return;
}
/** The SAX processingInstruction method does nothing. */
public void processingInstruction (String target, String data)
throws SAXException {
return;
}
}