storageexception.java

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/**
 * 
 */
package com.pjaol.ifodder.storage;

/**
 * @author pjaol
 * 
 */
public class StorageException extends Throwable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	private int id; // a unique id

	private String classname; // the name of the class

	private String method; // the name of the method

	private String message; // a detailed message

	private StorageException previous = null; // the exception which was
												// caught

	private String separator = "\n"; // line separator

	public StorageException(int id, String classname, String method,
			String message, StorageException previous) {
		this.id = id;
		this.classname = classname;
		this.method = method;
		this.message = message;
		this.previous = previous;
	}

	public String traceBack() {
		return traceBack("\n");
	}

	public String traceBack(String sep) {
		this.separator = sep;
		int level = 0;
		StorageException e = this;
		String text = line("Calling sequence (top to bottom)");
		while (e != null) {
			level++;
			text += line("--level " + level
					+ "--------------------------------------");
			text += line("Class/Method: " + e.classname + "/" + e.method);
			text += line("Id          : " + e.id);
			text += line("Message     : " + e.message);
			e = e.previous;
		}
		return text;
	}

	private String line(String s) {
		return s + separator;
	}

}