org.pentaho.pac.server.config.SpringSecurityHibernateConfig.java Source code

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Here is the source code for org.pentaho.pac.server.config.SpringSecurityHibernateConfig.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright 2008 - 2009 Pentaho Corporation.  All rights reserved.
*/
package org.pentaho.pac.server.config;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.pentaho.pac.server.common.util.DtdEntityResolver;
import org.pentaho.platform.api.util.XmlParseException;
import org.pentaho.platform.engine.security.userroledao.messages.Messages;
import org.pentaho.platform.util.xml.dom4j.XmlDom4JHelper;
import org.springframework.security.providers.encoding.PasswordEncoder;

/**
 * Object wrapper around contents of <code>applicationContext-spring-security-hibernate.xml</code>.
 * 
 * @author mlowery
 */
public class SpringSecurityHibernateConfig {
    Document document;

    private static final String ROOT_ELEMENT = "beans"; //$NON-NLS-1$

    private static final String PASSWORD_ENCODER_CLASS_XPATH = "/beans/bean[@id=\"passwordEncoder\"]/@class"; //$NON-NLS-1$

    public SpringSecurityHibernateConfig(File xmlFile) throws IOException, DocumentException, XmlParseException {
        this(getContents(xmlFile));
    }

    public SpringSecurityHibernateConfig(String xml) throws DocumentException, XmlParseException {
        this(XmlDom4JHelper.getDocFromString(xml, new DtdEntityResolver()));
    }

    public SpringSecurityHibernateConfig(Document doc) throws DocumentException {
        Element rootElement = doc.getRootElement();
        if ((rootElement != null) && !doc.getRootElement().getName().equals(ROOT_ELEMENT)) {
            throw new DocumentException(Messages.getErrorString("PentahoXml.ERROR_0001_INVALID_ROOT_ELEMENT")); //$NON-NLS-1$ 
        }
        document = doc;
    }

    public SpringSecurityHibernateConfig() {
        document = DocumentHelper.createDocument();
        document.addElement(ROOT_ELEMENT);
    }

    /**
     * Returns the password encoder used during login in the platform or null if it cannot be instantiated.
     */
    public PasswordEncoder getPasswordEncoder() {
        try {
            String pentahoEncoderClassName = document.selectSingleNode(PASSWORD_ENCODER_CLASS_XPATH).getText();
            Class passwordEncoderClass = Class.forName(pentahoEncoderClassName);
            return (PasswordEncoder) passwordEncoderClass.newInstance();
        } catch (ClassNotFoundException e) {
            return null;
        } catch (InstantiationException e) {
            return null;
        } catch (IllegalAccessException e) {
            return null;
        }
    }

    public Document getDocument() {
        return document;
    }

    private static String getContents(File aFile) throws FileNotFoundException, IOException {
        StringBuilder contents = new StringBuilder();

        BufferedReader input = new BufferedReader(new FileReader(aFile));
        try {
            String line = null;
            String lineSeparator = System.getProperty("line.separator"); //$NON-NLS-1$
            while ((line = input.readLine()) != null) {
                contents.append(line);
                contents.append(lineSeparator);
            }
        } finally {
            input.close();
        }

        return contents.toString();
    }

}