Package org.apache.turbine.modules.screens

Source Code of org.apache.turbine.modules.screens.Error

package org.apache.turbine.modules.screens;

/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation.  All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The end-user documentation included with the redistribution,
*    if any, must include the following acknowledgment:
*       "This product includes software developed by the
*        Apache Software Foundation (http://www.apache.org/)."
*    Alternately, this acknowledgment may appear in the software itself,
*    if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
*    "Apache Turbine" must not be used to endorse or promote products
*    derived from this software without prior written permission. For
*    written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
*    "Apache Turbine", nor may "Apache" appear in their name, without
*    prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/

// Java Core Classes
import java.util.Enumeration;
import java.util.Hashtable;

// Turbine Modules
import org.apache.turbine.modules.Screen;

// Turbine Utility Classes
import org.apache.turbine.util.RunData;

// ECS Classes
import org.apache.ecs.ConcreteElement;
import org.apache.ecs.html.B;
import org.apache.ecs.html.H3;
import org.apache.ecs.html.H4;
import org.apache.ecs.html.PRE;
import org.apache.ecs.html.Table;
import org.apache.ecs.html.TD;
import org.apache.ecs.html.TR;


/**
* This is a sample Error Screen module.
*
* @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
* @version $Id: Error.java,v 1.6 2001/05/23 16:37:15 mikeh Exp $
*/
public class Error extends Screen
{
    /**
     * Build screen.
     *
     * @param data Turbine information.
     * @exception Exception, a generic exception.
     */
    public ConcreteElement doBuild( RunData data )
        throws Exception
    {
        data.setTitle("There has been an error!");

        Table table = new Table().setBorder(0);
        boolean hasValues = false;
        Enumeration keys = data.getParameters().keys();
        while ( keys.hasMoreElements() )
        {
            String key = (String) keys.nextElement();
            String value = data.getParameters().getString(key);
            TR tr = new TR()
                .addElement( new TD().addElement(new B(key)) )
                .addElement( new TD().addElement(" = " + value ) );
            table.addElement(tr);
            hasValues = true;
        }

        Table table2 = new Table().setBorder(0);
        Hashtable varDebug = data.getVarDebug();
        keys = varDebug.keys();
        boolean hasValues2 = false;
        while ( keys.hasMoreElements() )
        {
            String key = (String) keys.nextElement();
            String value = varDebug.get(key).toString();
            TR tr = new TR()
                .addElement( new TD().addElement(new B(key)) )
                .addElement( new TD().addElement(" = " + value ) );
            table2.addElement(tr);
            hasValues2 = true;
        }

        data.getPage().getBody().addElement(new H3(data.getTitle() +
          " Please review the exception below for more information."));

        if ( hasValues )
        {
            data.getPage().getBody()
                .addElement(new H4().addElement("Get/Post Data:"));
            data.getPage().getBody().addElement(table);
        }

        if ( hasValues2 )
        {
            data.getPage()
                .getBody().addElement(new H4()
                          .addElement("Debugging Data:"));
            data.getPage().getBody().addElement(table2);
        }

        String trace = data.getStackTrace();
        if ( trace != null )
        {
            data.getPage().getBody()
                .addElement(new H4().addElement("The exception is:"))
                .addElement(new PRE(trace))
                .addElement(new PRE(data.getStackTraceException().toString()));
        }
        return null;
    }
}
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