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package com.sun.xml.xsom.parser;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.net.URL;
import java.util.Set;
import java.util.HashSet;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.ContentHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import com.sun.xml.xsom.XSSchemaSet;
import com.sun.xml.xsom.impl.parser.NGCCRuntimeEx;
import com.sun.xml.xsom.impl.parser.ParserContext;
import com.sun.xml.xsom.impl.parser.state.Schema;
/**
* Parses possibly multiple W3C XML Schema files and compose
* them into one grammar.
*
* @author
* Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
*/
public final class XSOMParser {
private EntityResolver entityResolver;
private ErrorHandler userErrorHandler;
private AnnotationParserFactory apFactory;
private final ParserContext context;
/**
* Creates a new XSOMParser by using a SAX parser from JAXP.
*/
public XSOMParser() {
this(new JAXPParser());
}
/**
* Creates a new XSOMParser that uses the given SAXParserFactory
* for creating new SAX parsers.
*
* The caller needs to configure
* it properly. Don't forget to call <code>setNamespaceAware(true)</code>
* or you'll see some strange errors.
*/
public XSOMParser( SAXParserFactory factory ) {
this( new JAXPParser(factory) );
}
/**
* Creates a new XSOMParser that reads XML Schema from non-standard
* inputs.
*
* By implementing the {@link XMLParser} interface, XML Schema
* can be read from something other than XML.
*
* @param parser
* This parser will be called to parse XML Schema documents.
*/
public XSOMParser(XMLParser parser) {
context = new ParserContext(this,parser);
}
/**
* Parses a new XML Schema document.
*
* <p>
* When using this method, XSOM does not know the system ID of
* this document, therefore, when this stream contains relative
* references to other schemas, XSOM will fail to resolve them.
* To specify an system ID with a stream, use {@link InputSource}
*/
public void parse( InputStream is ) throws SAXException {
parse(new InputSource(is));
}
/**
* Parses a new XML Schema document.
*
* <p>
* When using this method, XSOM does not know the system ID of
* this document, therefore, when this reader contains relative
* references to other schemas, XSOM will fail to resolve them.
* To specify an system ID with a reader, use {@link InputSource}
*/
public void parse( Reader reader ) throws SAXException {
parse(new InputSource(reader));
}
/**
* Parses a new XML Schema document.
*/
public void parse( File schema ) throws SAXException, IOException {
parse(schema.toURL());
}
/**
* Parses a new XML Schema document.
*/
public void parse( URL url ) throws SAXException {
parse( url.toExternalForm() );
}
/**
* Parses a new XML Schema document.
*/
public void parse( String systemId ) throws SAXException {
parse(new InputSource(systemId));
}
/**
* Parses a new XML Schema document.
*
* <p>
* Note that if the {@link InputSource} does not have a system ID,
* XSOM will fail to resolve them.
*/
public void parse( InputSource source ) throws SAXException {
context.parse(source);
}
/**
* Gets the parser implemented as a ContentHandler.
*
* One can feed XML Schema as SAX events to this interface to
* parse a schema. To parse multiple schema files, feed multiple
* sets of events.
*
* <p>
* If you don't send a complete event sequence from a startDocument
* event to an endDocument event, the state of XSOMParser can become
* unstable. This sometimes happen when you encounter an error while
* generating SAX events. Don't call the getResult method in that case.
*
* <p>
* This way of reading XML Schema can be useful when XML Schema is
* not available as a stand-alone XML document.
* For example, one can feed XML Schema inside a WSDL document.
*/
public ContentHandler getParserHandler() {
NGCCRuntimeEx runtime = context.newNGCCRuntime();
Schema s = new Schema(runtime,false,null);
runtime.setRootHandler(s);
return runtime;
}
/**
* Gets the parsed result. Don't call this method until
* you parse all the schemas.
*
* @return
* If there was any parse error, this method returns null.
* To receive error information, specify your error handler
* through the setErrorHandler method.
* @exception SAXException
* This exception will never be thrown unless it is thrown
* by an error handler.
*/
public XSSchemaSet getResult() throws SAXException {
return context.getResult();
}
/**
* Gets the set of {@link SchemaDocument} that represents
* parsed documents so far.
*
* @return
* can be empty but never null.
*/
public Set<SchemaDocument> getDocuments() {
return new HashSet<SchemaDocument>(context.parsedDocuments.keySet());
}
public EntityResolver getEntityResolver() {
return entityResolver;
}
/**
* Set an entity resolver that is used to resolve things
* like <xsd:import> and <xsd:include>.
*/
public void setEntityResolver( EntityResolver resolver ) {
this.entityResolver = resolver;
}
public ErrorHandler getErrorHandler() {
return userErrorHandler;
}
/**
* Set an error handler that receives all the errors encountered
* during the parsing.
*/
public void setErrorHandler(ErrorHandler errorHandler) {
this.userErrorHandler = errorHandler;
}
/**
* Sets the annotation parser.
*
* Annotation parser can be used to parse application-specific
* annotations inside a schema.
*
* <p>
* For each annotation, new instance of this class will be
* created and used to parse <xs:annotation>.
*/
public void setAnnotationParser( final Class annParser ) {
setAnnotationParser( new AnnotationParserFactory() {
public AnnotationParser create() {
try {
return (AnnotationParser)annParser.newInstance();
} catch( InstantiationException e ) {
throw new InstantiationError(e.getMessage());
} catch( IllegalAccessException e ) {
throw new IllegalAccessError(e.getMessage());
}
}
});
}
/**
* Sets the annotation parser factory.
*
* <p>
* The specified factory will be used to create AnnotationParsers.
*/
public void setAnnotationParser( AnnotationParserFactory factory ) {
this.apFactory = factory;
}
public AnnotationParserFactory getAnnotationParserFactory() {
return apFactory;
}
}