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TOVAL comprises a set of java classes for common programming issues. It includes utils for arrays, lists, sets and collections for convenient handling and modification, but also support for mathematic definitions concerning logic (clauses + resolution) together with some algorithms for permutations, powersets and resolution. Additionally it contains a number of types for multisets, matrices with object keys and much more.

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package de.invation.code.toval.validate;

public class ParameterException extends IllegalArgumentException {

	private static final long serialVersionUID = 3432333417522563960L;
	
	private ErrorCode errorCode = null;
	private final String msg_NullPointer = "Parameter is null";
	private final String msg_RangeViolation = "Parameter out of range";
	private final String msg_Negative = "Parameter is negative";
	private final String msg_NotNegative = "Parameter is 0 or positive";
	private final String msg_Positive = "Parameter is positive";
	private final String msg_NotPositive = "Parameter 0 or negative";
	private final String msg_Empty = "Parameter is empty";
	private final String msg_NullElements = "Parameter contains null elements";
	private final String msg_Constraint = "Parameter does not fulfill constraint";
	
	private boolean usePredefinedMessages = true;
	
	public ParameterException(ErrorCode errorCode){
		super();
		this.errorCode = errorCode;
	}
	
	public ParameterException(ErrorCode errorCode, String message){
		super(message);
		usePredefinedMessages = false;
	}
	
	public ParameterException(String message){
		super(message);
		usePredefinedMessages = false;
	}
        
        public ParameterException(ErrorCode errorCode, Throwable cause){
		super(cause);
		this.errorCode = errorCode;
	}
	
	public ParameterException(ErrorCode errorCode, String message, Throwable cause){
		super(message, cause);
		usePredefinedMessages = false;
	}
	
	public ParameterException(String message, Throwable cause){
		super(message, cause);
		usePredefinedMessages = false;
	}
	
	@Override
	public String getMessage(){
		if(!usePredefinedMessages){
			return super.getMessage();
		}
		switch(errorCode){
			case NULLPOINTER: return msg_NullPointer;
			case RANGEVIOLATION: return msg_RangeViolation;
			case NEGATIVE: return msg_Negative;
			case NOTNEGATIVE: return msg_NotNegative;
			case POSITIVE: return msg_Positive;
			case NOTPOSITIVE: return msg_NotPositive;
			case EMPTY: return msg_Empty;
			case NULLELEMENTS: return msg_NullElements;
			case INCONSISTENCY: return super.getMessage();
			case INCOMPATIBILITY: return super.getMessage();
			case MEMORY: return super.getMessage();
			case TYPE: return super.getMessage();
			case CONSTRAINT: return msg_Constraint;
		}
		return null;
	}
	
	public ErrorCode getErrorCode(){
		return errorCode;
	}
	
	public enum ErrorCode { 
		NULLPOINTER, RANGEVIOLATION, NEGATIVE, NOTNEGATIVE, POSITIVE, NOTPOSITIVE, EMPTY, NULLELEMENTS, INCONSISTENCY, TYPE, INCOMPATIBILITY, CONSTRAINT, MEMORY;
	}

}