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eFaps is a framework used to map objects with or without attached files to
a relational database and optional file systems (only for attaches files). Configurable access control can be provided down to object and attribute level depending on implementation and use case. Depending on requirements, events (like triggers) allow to implement business logic and to separate business logic from user interface.
The framework includes integrations (e.g. webdav, full text search) and a web application as 'simple' configurable user interface. Some best practises, example web application modules (e.g. team work module) support administrators and implementers using this framework.
/*
* Copyright 2003 - 2011 The eFaps Team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Revision: $Rev: 6143 $
* Last Changed: $Date: 2011-02-09 17:16:59 -0500 (Wed, 09 Feb 2011) $
* Last Changed By: $Author: [email protected] $
*/
package org.efaps.util;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.sql.SQLException;
/**
* The class is the exception class used to throw exception. This exceptions
* are shown in the user interface (web browser). The exception text stands
* in the properties. The key value in the property is the name of the class
* ({@link #className}) plus the id ({@link #id}) plus the strings .Id,
* .Error and .Action to show the user a internationalized
* description of the exception.
*
* @author The eFaps Team
* @version $Id: EFapsException.java 6143 2011-02-09 22:16:59Z [email protected] $
*/
public class EFapsException
extends Exception
{
/**
* Unique identifier used to serialize this class.
*/
private static final long serialVersionUID = 1906998311318776048L;
/**
* The instance variable stores the class name where the exception occurs.
*
* @see #getClassName()
*/
private final Class className;
/**
* The instance variable stores the id (key) of the exception.
*
* @see #getId()
*/
private final String id;
/**
* The instance variable stores the arguments replaced in the error text.
*
* @see #getArgs()
*/
private final Object[] args;
/**
* @param _className name of class in which the exception is thrown
* @param _id id of the exception which is thrown
* @param _args argument arrays
*/
public EFapsException(final Class _className,
final String _id,
final Object... _args)
{
super("error in " + _className.getName() + "(" + _id + "," + _args + ")");
this.id = _id;
this.className = _className;
if (_args != null && _args.length > 0 && _args[0] instanceof Throwable) {
initCause((Throwable) _args[0]);
}
this.args = _args;
}
/**
* @param _message message of the exception
* @param _cause cause
*/
public EFapsException(final String _message,
final Throwable _cause)
{
super(_message, _cause);
if (_cause instanceof EFapsException) {
final EFapsException cause = (EFapsException) _cause;
this.id = cause.getId();
this.className = cause.getClassName();
this.args = cause.getArgs();
} else {
this.id = null;
this.className = null;
this.args = null;
}
}
/**
* If a caused exception is a {@link SQLException}, also all next
* exceptions of the {@link SQLException}'s are printed into the stack
* trace.
*
* @param _stream PrintStream to use for output
* @see #makeInfo() to get all information about this EFapsException
*/
@Override
public void printStackTrace(final PrintStream _stream)
{
_stream.append(makeInfo());
super.printStackTrace(_stream);
if ((getCause() != null) && (getCause() instanceof SQLException)) {
SQLException ex = (SQLException) getCause();
ex = ex.getNextException();
while (ex != null) {
_stream.append("Next SQL Exception is: ");
ex.printStackTrace(_stream);
ex = ex.getNextException();
}
}
}
/**
* If a caused exception is a {@link SQLException}, also all next
* exceptions of the {@link SQLException}'s are printed into the stack
* trace.
*
* @param _writer PrintWriter to use for output
* @see #makeInfo() to get all information about this EFapsException
*/
@Override
public void printStackTrace(final PrintWriter _writer)
{
_writer.append(makeInfo());
if (this.className != null) {
_writer.append("Thrown within class ").append(this.className.getName()).append('\n');
}
super.printStackTrace(_writer);
if ((getCause() != null) && (getCause() instanceof SQLException)) {
SQLException ex = (SQLException) getCause();
ex = ex.getNextException();
while (ex != null) {
_writer.append("Next SQL Exception is: ");
ex.printStackTrace(_writer);
ex = ex.getNextException();
}
}
}
/**
* Prepares a string of all information of this EFapsException. The
* returned string includes information about the class which throws this
* exception, the exception id and all arguments.
*
* @return string representation about the EFapsException
*/
protected String makeInfo()
{
final StringBuilder str = new StringBuilder();
if (this.className != null) {
str.append("Thrown within class ").append(this.className.getName()).append('\n');
}
if (this.id != null) {
str.append("Id of Exception is ").append(this.id).append('\n');
}
if ((this.args != null) && (this.args.length > 0)) {
str.append("Arguments are:\n");
for (Integer index = 0; index < this.args.length; index++) {
final String arg = (this.args[index] == null)
? "null"
: this.args[index].toString();
str.append("\targs[").append(index.toString()).append("] = '").append(arg).append("'\n");
}
}
return str.toString();
}
/**
* This is the getter method for instance variable {@link #className}.
*
* @return value of instance variable {@link #className}
* @see #className
*/
public Class getClassName()
{
return this.className;
}
/**
* This is the getter method for instance variable {@link #id}.
*
* @return value of instance variable {@link #id}
* @see #id
*/
public String getId()
{
return this.id;
}
/**
* This is the getter method for instance variable {@link #args}.
*
* @return value of instance variable {@link #args}
* @see #args
*/
public Object[] getArgs()
{
return this.args;
}
}