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/* *************************************************************************
IT Mill Toolkit
Development of Browser User Intarfaces Made Easy
Copyright (C) 2000-2006 IT Mill Ltd
*************************************************************************
This product is distributed under commercial license that can be found
from the product package on license/license.txt. Use of this product might
require purchasing a commercial license from IT Mill Ltd. For guidelines
on usage, see license/licensing-guidelines.html
*************************************************************************
For more information, contact:
IT Mill Ltd phone: +358 2 4802 7180
Ruukinkatu 2-4 fax: +358 2 4802 7181
20540, Turku email: info@itmill.com
Finland company www: www.itmill.com
Primary source for information and releases: www.itmill.com
********************************************************************** */
package com.itmill.toolkit.data.validator;
import com.itmill.toolkit.data.*;
/**
* @author Administrator
*
* To change this generated comment edit the template variable "typecomment":
* Window>Preferences>Java>Templates.
* To enable and disable the creation of type comments go to
* Window>Preferences>Java>Code Generation.
*/
/** This validator is used to validate the lenght of strings.
*
* @author IT Mill Ltd.
* @version @VERSION@
* @since 3.0
*/
public class StringLengthValidator implements Validator {
private int minLength = -1;
private int maxLength = -1;
private boolean allowNull = true;
private String errorMessage;
/** Create a new StringLengthValidator with a given error message.
*
* @param errorMessage - The message to display in case the value does not validate.
*/
public StringLengthValidator(String errorMessage) {
setErrorMessage(errorMessage);
}
/** Create a new StringLenghtValidator with a given error message,
* permissable lenghts and null-string allowance.
*
* @param errorMessage - The message to display in case the value does not validate.
* @param minLenght - The minimum permissable lenght of the string.
* @param maxLenght - The maximum permissable lenght of the string.
* @param allowNull - Are null strings permissable?
*/
public StringLengthValidator(
String errorMessage,
int minLength,
int maxLength,
boolean allowNull) {
this(errorMessage);
setMinLength(minLength);
setMaxLength(maxLength);
setNullAllowed(allowNull);
}
/** Validate the value.
* @param value - The value to validate.
*/
public void validate(Object value) throws Validator.InvalidValueException {
if (value == null && !allowNull)
throw new Validator.InvalidValueException(errorMessage);
String s = value.toString();
if (s == null && !allowNull)
throw new Validator.InvalidValueException(errorMessage);
int len = s.length();
if ((minLength >= 0 && len < minLength)
|| (maxLength >= 0 && len > maxLength))
throw new Validator.InvalidValueException(errorMessage);
}
/** True if the value is valid.
* @param value - The value to validate.
*/
public boolean isValid(Object value) {
if (value == null && !allowNull)
return true;
String s = value.toString();
if (s == null && !allowNull)
return true;
int len = s.length();
if ((minLength >= 0 && len < minLength)
|| (maxLength >= 0 && len > maxLength))
return false;
return true;
}
/** True if null strings are allowed.
*/
public final boolean isNullAllowed() {
return allowNull;
}
/** Get the maximum permissable length of the string.
*/
public final int getMaxLength() {
return maxLength;
}
/** Get the minimum permissable lenght of the string.
*/
public final int getMinLength() {
return minLength;
}
/** Sets wheter null-strings are to be allowed.
*/
public void setNullAllowed(boolean allowNull) {
this.allowNull = allowNull;
}
/** Set the maximum permissable length of the string.
* @param maxLenght - The lenght to set.
*/
public void setMaxLength(int maxLength) {
if (maxLength < -1)
maxLength = -1;
this.maxLength = maxLength;
}
/** Sets the minimum permissable lenght.
* @param minLenght - The lenght to set.
*/
public void setMinLength(int minLength) {
if (minLength < -1)
minLength = -1;
this.minLength = minLength;
}
/** Gets the message to be displayed in case the
* value does not validate.
*/
public String getErrorMessage() {
return errorMessage;
}
/** Sets the message to be displayer in case the
* value does not validate.
*/
public void setErrorMessage(String errorMessage) {
this.errorMessage = errorMessage;
}
}
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