JResourceManager.java

package org.objectweb.jonas.security.lib;

import java.io.File;
import java.io.Reader;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.digester.Digester;

import org.objectweb.jonas.common.JProp;
import org.objectweb.jonas.common.Log;
import org.objectweb.jonas.security.JResources;
import org.objectweb.jonas.security.SecurityServiceException;
import org.objectweb.jonas.security.rules.JDSRuleSet;
import org.objectweb.jonas.security.rules.JLDAPRuleSet;
import org.objectweb.jonas.security.rules.JMemoryRuleSet;

import org.objectweb.util.monolog.api.BasicLevel;
import org.objectweb.util.monolog.api.Logger;


public class JResourceManager {

    private static Logger logger = Log.getLogger(Log.JONAS_SECURITY_PREFIX);

    private String xmlDir = null;

    protected static final String CONFIG_FILE_DTD = "jonas-realm_1_0.dtd";

    private static final String JONAS_ROOT = JProp.getInstallRoot();

    private static JResourceManager instance = null;


    private JResourceManager() {
        xmlDir = JONAS_ROOT + File.separator + "xml" +  File.separator;
    }

    public static JResourceManager getInstance() {
        if (instance == null) {
            instance = new JResourceManager();
        }
        return instance;
    }

    protected Digester createRealmDigester() {

        // Initialize the digester
        Digester digester = new Digester();
        File realmDtd = new File(xmlDir + CONFIG_FILE_DTD);
        URL realmDtdURL = null;
        boolean validating = true;
        try {
            realmDtdURL = realmDtd.toURL();
            digester.register("-//ObjectWeb//DTD JOnAS realm 1.0//EN", realmDtdURL.toExternalForm());
        } catch (MalformedURLException e) {
            // Can't locate URL for DTD, no validation
            logger.log(BasicLevel.INFO, "Can not locate URL for DTD validation, no validation will be done." + e.getMessage());
            validating = false;
        }

        digester.setValidating(validating);
        digester.setErrorHandler(new JErrorHandler());
        digester.addRuleSet(new JMemoryRuleSet("jonas-realm/jonas-memoryrealm/"));
        digester.addRuleSet(new JDSRuleSet("jonas-realm/jonas-dsrealm/"));
        digester.addRuleSet(new JLDAPRuleSet("jonas-realm/jonas-ldaprealm/"));

        return (digester);
    }

    public void addResources(JResources res, Reader reader, String xml) throws SecurityServiceException {
        // Create the digester for the parsing of the jonas-realm.xml file.
        Digester realmDigester = createRealmDigester();

        try {
            realmDigester.push(res);
            realmDigester.parse(reader);
            reader.close();
        } catch (org.xml.sax.SAXException saxe) {
            logger.log(BasicLevel.ERROR, "Error when parsing the XML of the file " + xml);
            throw new SecurityServiceException(saxe.getMessage(), saxe);
        } catch (Exception e) {
            logger.log(BasicLevel.ERROR, "Error when reading config file from the xml file " + xml);
            throw new SecurityServiceException("Error when reading config file from the xml file " + xml + " : " + e.getMessage(), e);
        }

    }


}

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