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package com.sun.enterprise.admin.servermgmt.stringsubs.impl;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.sax.SAXSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import com.sun.enterprise.admin.servermgmt.stringsubs.StringSubstitutionException;
import com.sun.enterprise.admin.servermgmt.xml.stringsubs.StringsubsDefinition;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
/**
* This class parses the string substitution XML.
*/
public class StringSubstitutionParser {
private static final Logger _logger =
Logger.getLogger(StringSubstitutionParser.class.getPackage().getName());
private static final LocalStringsImpl _strings = new LocalStringsImpl(StringSubstitutionParser.class);
// Path where schema resides i.e Parent directory for schema.
private final static String DEFAULT_SCHEMA = "xsd/schema/stringsubs.xsd";
/**
* Parse the configuration stream against the string-subs schema.
*
* @param configStream InputStream of stringsubs.xml file.
* @return Parsed Object.
* @throws StringSubstitutionException If any error occurs in parsing.
*/
@SuppressWarnings("rawtypes")
public static StringsubsDefinition parse(InputStream configStream)
throws StringSubstitutionException {
// If schema information is missing
if(configStream == null) {
throw new StringSubstitutionException(_strings.get("invalidStream"));
}
try {
URL schemaUrl = StringSubstitutionParser.class.getClassLoader().getResource(DEFAULT_SCHEMA);
JAXBContext context = JAXBContext.newInstance(StringsubsDefinition.class.getPackage().getName());
Unmarshaller unmarshaller = context.createUnmarshaller();
SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = schemaFactory.newSchema(schemaUrl);
unmarshaller.setSchema(schema);
InputSource is = new InputSource(configStream);
SAXSource source = new SAXSource(is);
Object obj = unmarshaller.unmarshal(source);
return obj instanceof JAXBElement ? (StringsubsDefinition) ((JAXBElement) obj).getValue() : (StringsubsDefinition) obj;
} catch(SAXException se) {
throw new StringSubstitutionException(_strings.get("failedToParse", DEFAULT_SCHEMA), se);
} catch(JAXBException jaxbe) {
throw new StringSubstitutionException(_strings.get("failedToParse", DEFAULT_SCHEMA), jaxbe);
} finally {
if(configStream != null) {
try {
configStream.close();
configStream = null;
} catch(IOException e) {
_logger.log(Level.FINER, _strings.get("errorInClosingStream"));
}
}
}
}
}