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package com.sun.enterprise.deployment.node;

import com.sun.enterprise.deployment.util.DOLUtils;
import org.jvnet.hk2.annotations.Service;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
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/ * * This ParserHandler is used by Embedded GlassFish as well. * * @author tjquinn */ @Service 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 publicID public ID of the requested entity * @param systemID 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. */ result = openSchemaSource(systemID); if (result == null) { /* *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; result = openDTDSource(publicID); } 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. */ result = openSchemaSource(systemID); if (result == null) { /* * As a last resort, try opening the DTD without going * through the mapping table. */ result = openInputSource(BUNDLED_DTD_ROOT, systemID); } } } } catch (Exception exc) { DOLUtils.getDefaultLogger().log(Level.SEVERE, "Error occurred", exc); throw new SAXException(exc); } return result; } /** * Returns an InputStream for the schema with the requested system ID. * * @param systemID system ID of the schema * @return an InputStream to the selected schema; null if the schema is not available */ private InputSource openSchemaSource(String systemID) { return openInputSource(BUNDLED_SCHEMA_ROOT, systemID); } /** * Returns an InputStream for the DTD with the requested public ID. * * @param publicID public ID of the DTD requested * @return an InputStream to the selected DTD; null if the DTD is not available */ private InputSource openDTDSource(String publicID) { return openInputSource(BUNDLED_DTD_ROOT, getMapping().get(publicID)); } private InputSource openInputSource(final String localRoot, final String systemID) { String targetID = localRoot + "/" + systemID.substring(systemID.lastIndexOf("/") + 1); URL url = this.getClass().getResource(targetID); InputStream stream; try { stream = url != null ? url.openStream() : null; } catch (IOException e) { stream = null; } InputSource source = null; if (stream != null) { source = new InputSource(stream); source.setSystemId(url.toString()); } return source; } }





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