com.sun.enterprise.deployment.node.SaxParserHandlerBundled Maven / Gradle / Ivy
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package com.sun.enterprise.deployment.node;
import com.sun.enterprise.deployment.util.DOLUtils;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import java.io.InputStream;
import java.util.logging.Level;
/**
*Provides access to schemas and DTDs to Java Web Start-launched app clients
*that do not have an app server product installation at hand.
*
*The DTDs and schemas are assumed to be in the classpath so that
*schemas are at /schemas/ and DTDs at /dtds/
*
* @author tjquinn
*/
public class SaxParserHandlerBundled extends SaxParserHandler {
/** prefixes for the paths to use for looking up schemas and dtds as resources */
private static final String BUNDLED_SCHEMA_ROOT = "/schemas";
private static final String BUNDLED_DTD_ROOT = "/dtds";
/** Creates a new instance of SaxParserHandlerBundled */
public SaxParserHandlerBundled() {
}
/**
*Returns an InputSource for the requested DTD or schema.
*
*This implementation returns an InputSource that wraps the result
*of getResourceAsStream, having
*located the requested schema in the classpath.
*@param the public ID of the requested entity
*@param the system ID of the requested entity
*@return InputSource for the requested entity; null if not available
*@throws SAXException in case of errors resolving the entity
*/
public InputSource resolveEntity(String publicID, String systemID) throws SAXException {
InputSource result = null;
/*
*This logic was patterned after that in the superclass.
*/
try {
if(DOLUtils.getDefaultLogger().isLoggable(Level.FINE)) {
DOLUtils.getDefaultLogger().fine("Asked to resolve " + publicID + " system id = " + systemID);
}
if (publicID==null) {
// unspecified schema
if (systemID==null || systemID.lastIndexOf('/')==systemID.length()) {
return null;
}
/*
*Attempt to open a stream to the requested resource as a schema.
*/
InputStream is = openSchemaStream(systemID);
if (is != null) {
/*
*We found the entity, so wrap an InputSource around the stream.
*/
result = new InputSource(is);
} else {
/*
*The entity was not found, so wrap an InputSource around the system ID string instead.
*/
result = new InputSource(systemID);
}
} else {
/*
*Try to find a DTD for the entity.
*/
if ( getMapping().containsKey(publicID)) {
this.publicID = publicID;
InputStream is = openDTDStream(publicID);
if (is != null) {
result = new InputSource(is);
}
} else if (systemID != null) {
/*
*The DTD lookup failed but a system ID was also specified. Try
*looking up the DTD in the schemas path, because some reside
*there and were not registered in the DTD map by SaxParserHandler.
*/
InputStream is = openSchemaStream(systemID);
if (is != null) {
result = new InputSource(is);
}
}
}
} catch (Exception exc) {
exc.printStackTrace();
throw new SAXException(exc);
}
return result;
}
/**
*Returns an InputStream for the schema with the requested system ID.
*@param systemID of the schema
*@return an InputStream to the selected schema; null if the schema is not available
*/
private InputStream openSchemaStream(String systemID) {
String targetID = BUNDLED_SCHEMA_ROOT + "/" + systemID.substring(systemID.lastIndexOf("/") + 1 );
InputStream result = this.getClass().getResourceAsStream(targetID);
return result;
}
/**
*Returns an InputStream for the DTD with the requested public ID.
*@param the publicID of the DTD requested
*@return an InputStream to the selected DTD; null if the DTD is not available
*/
private InputStream openDTDStream(String publicID) {
String targetID = BUNDLED_DTD_ROOT + "/" + getMapping().get(publicID);
InputStream result = this.getClass().getResourceAsStream(targetID);
return result;
}
}