/*
* $Id: FieldChecks.java 54929 2004-10-16 16:38:42Z germuska $
*
* Copyright 2000-2004 The Apache Software Foundation.
*
* 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.
*/
package org.apache.struts.validator;
import java.io.Serializable;
import java.util.Date;
import java.util.Locale;
import java.util.StringTokenizer;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.validator.Field;
import org.apache.commons.validator.GenericTypeValidator;
import org.apache.commons.validator.GenericValidator;
import org.apache.commons.validator.UrlValidator;
import org.apache.commons.validator.ValidatorAction;
import org.apache.commons.validator.util.ValidatorUtils;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.util.RequestUtils;
/**
* <p>
* This class contains the default validations that are used in the
* validator-rules.xml file.
* </p>
* <p>
* In general passing in a null or blank will return a null Object or a false
* boolean. However, nulls and blanks do not result in an error being added to the
* errors.
* </p>
*
* @since Struts 1.1
*/
public class FieldChecks implements Serializable {
/**
* Commons Logging instance.
*/
private static final Log log = LogFactory.getLog(FieldChecks.class);
public static final String FIELD_TEST_NULL = "NULL";
public static final String FIELD_TEST_NOTNULL = "NOTNULL";
public static final String FIELD_TEST_EQUAL = "EQUAL";
/**
* Checks if the field isn't null and length of the field is greater than zero not
* including whitespace.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if
* any validation errors occur.
* @param request Current request object.
* @return true if meets stated requirements, false otherwise.
*/
public static boolean validateRequired(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
} else {
return true;
}
}
/**
* Checks if the field isn't null based on the values of other fields.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being
* performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if
* any validation errors occur.
* @param validator The <code>Validator</code> instance, used to access
* other field values.
* @param request Current request object.
* @return true if meets stated requirements, false otherwise.
*/
public static boolean validateRequiredIf(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
org.apache.commons.validator.Validator validator,
HttpServletRequest request) {
Object form = validator.getParameterValue(org.apache.commons.validator.Validator.BEAN_PARAM);
String value = null;
boolean required = false;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
int i = 0;
String fieldJoin = "AND";
if (!GenericValidator.isBlankOrNull(field.getVarValue("fieldJoin"))) {
fieldJoin = field.getVarValue("fieldJoin");
}
if (fieldJoin.equalsIgnoreCase("AND")) {
required = true;
}
while (!GenericValidator.isBlankOrNull(field.getVarValue("field[" + i + "]"))) {
String dependProp = field.getVarValue("field[" + i + "]");
String dependTest = field.getVarValue("fieldTest[" + i + "]");
String dependTestValue = field.getVarValue("fieldValue[" + i + "]");
String dependIndexed = field.getVarValue("fieldIndexed[" + i + "]");
if (dependIndexed == null) {
dependIndexed = "false";
}
String dependVal = null;
boolean thisRequired = false;
if (field.isIndexed() && dependIndexed.equalsIgnoreCase("true")) {
String key = field.getKey();
if ((key.indexOf("[") > -1) && (key.indexOf("]") > -1)) {
String ind = key.substring(0, key.indexOf(".") + 1);
dependProp = ind + dependProp;
}
}
dependVal = ValidatorUtils.getValueAsString(form, dependProp);
if (dependTest.equals(FIELD_TEST_NULL)) {
if ((dependVal != null) && (dependVal.length() > 0)) {
thisRequired = false;
} else {
thisRequired = true;
}
}
if (dependTest.equals(FIELD_TEST_NOTNULL)) {
if ((dependVal != null) && (dependVal.length() > 0)) {
thisRequired = true;
} else {
thisRequired = false;
}
}
if (dependTest.equals(FIELD_TEST_EQUAL)) {
thisRequired = dependTestValue.equalsIgnoreCase(dependVal);
}
if (fieldJoin.equalsIgnoreCase("AND")) {
required = required && thisRequired;
} else {
required = required || thisRequired;
}
i++;
}
if (required) {
if (GenericValidator.isBlankOrNull(value)) {
errors.add(
field.getKey(),
Resources.getActionMessage(request, va, field));
return false;
} else {
return true;
}
}
return true;
}
/**
* Checks if the field matches the regular expression in the field's mask attribute.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being
* performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if
* any validation errors occur.
* @param request Current request object.
* @return true if field matches mask, false otherwise.
*/
public static boolean validateMask(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String mask = field.getVarValue("mask");
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
try {
if (!GenericValidator.isBlankOrNull(value)
&& !GenericValidator.matchRegexp(value, mask)) {
errors.add(
field.getKey(),
Resources.getActionMessage(request, va, field));
return false;
} else {
return true;
}
} catch (Exception e) {
log.error(e.getMessage(), e);
}
return true;
}
/**
* Checks if the field can safely be converted to a byte primitive.
*
*@param bean The bean validation is being performed on.
*@param va The <code>ValidatorAction</code> that is currently being performed.
*@param field The <code>Field</code> object associated with the current
*field being validated.
*@param errors The <code>ActionMessages</code> object to add errors to if
*any validation errors occur.
*@param request Current request object.
*@return true if valid, false otherwise.
*/
public static Object validateByte(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
result = GenericTypeValidator.formatByte(value);
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if the field can safely be converted to a short primitive.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if
* any validation errors occur.
* @param request Current request object.
* @return true if valid, false otherwise.
*/
public static Object validateShort(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
result = GenericTypeValidator.formatShort(value);
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if the field can safely be converted to an int primitive.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return true if valid, false otherwise.
*/
public static Object validateInteger(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
result = GenericTypeValidator.formatInt(value);
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if the field can safely be converted to a long primitive.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return true if valid, false otherwise.
*/
public static Object validateLong(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
result = GenericTypeValidator.formatLong(value);
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if the field can safely be converted to a float primitive.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return true if valid, false otherwise.
*/
public static Object validateFloat(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
result = GenericTypeValidator.formatFloat(value);
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if the field can safely be converted to a double primitive.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return true if valid, false otherwise.
*/
public static Object validateDouble(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
result = GenericTypeValidator.formatDouble(value);
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if the field is a valid date. If the field has a datePattern variable,
* that will be used to format <code>java.text.SimpleDateFormat</code>. If the
* field has a datePatternStrict variable, that will be used to format <code>java.text.SimpleDateFormat</code>
* and the length will be checked so '2/12/1999' will not pass validation with
* the format 'MM/dd/yyyy' because the month isn't two digits. If no datePattern
* variable is specified, then the field gets the DateFormat.SHORT format for
* the locale. The setLenient method is set to <code>false</code> for all variations.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return true if valid, false otherwise.
*/
public static Object validateDate(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
String datePattern = field.getVarValue("datePattern");
String datePatternStrict = field.getVarValue("datePatternStrict");
Locale locale = RequestUtils.getUserLocale(request, null);
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
try {
if (datePattern != null && datePattern.length() > 0) {
result = GenericTypeValidator.formatDate(value, datePattern, false);
} else if (datePatternStrict != null && datePatternStrict.length() > 0) {
result = GenericTypeValidator.formatDate(value, datePatternStrict, true);
} else {
result = GenericTypeValidator.formatDate(value, locale);
}
} catch (Exception e) {
log.error(e.getMessage(), e);
}
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if a fields value is within a range (min & max specified in the
* vars attribute).
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return True if in range, false otherwise.
*/
public static boolean validateIntRange(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (!GenericValidator.isBlankOrNull(value)) {
try {
int intValue = Integer.parseInt(value);
int min = Integer.parseInt(field.getVarValue("min"));
int max = Integer.parseInt(field.getVarValue("max"));
if (!GenericValidator.isInRange(intValue, min, max)) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
} catch (Exception e) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
}
return true;
}
/**
* Checks if a fields value is within a range (min & max specified in the
* vars attribute).
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return True if in range, false otherwise.
*/
public static boolean validateDoubleRange(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (!GenericValidator.isBlankOrNull(value)) {
try {
double doubleValue = Double.parseDouble(value);
double min = Double.parseDouble(field.getVarValue("min"));
double max = Double.parseDouble(field.getVarValue("max"));
if (!GenericValidator.isInRange(doubleValue, min, max)) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
} catch (Exception e) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
}
return true;
}
/**
* Checks if a fields value is within a range (min & max specified in the
* vars attribute).
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return True if in range, false otherwise.
*/
public static boolean validateFloatRange(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (!GenericValidator.isBlankOrNull(value)) {
try {
float floatValue = Float.parseFloat(value);
float min = Float.parseFloat(field.getVarValue("min"));
float max = Float.parseFloat(field.getVarValue("max"));
if (!GenericValidator.isInRange(floatValue, min, max)) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
} catch (Exception e) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
}
return true;
}
/**
* Checks if the field is a valid credit card number.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return true if valid, false otherwise.
*/
public static Object validateCreditCard(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
Object result = null;
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return Boolean.TRUE;
}
result = GenericTypeValidator.formatCreditCard(value);
if (result == null) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
}
return result == null ? Boolean.FALSE : result;
}
/**
* Checks if a field has a valid e-mail address.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return True if valid, false otherwise.
*/
public static boolean validateEmail(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (!GenericValidator.isBlankOrNull(value) && !GenericValidator.isEmail(value)) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
} else {
return true;
}
}
/**
* Checks if the field's length is less than or equal to the maximum value.
* A <code>Null</code> will be considered an error.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return True if stated conditions met.
*/
public static boolean validateMaxLength(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (value != null) {
try {
int max = Integer.parseInt(field.getVarValue("maxlength"));
if (!GenericValidator.maxLength(value, max)) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
} catch (Exception e) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
}
return true;
}
/**
* Checks if the field's length is greater than or equal to the minimum value.
* A <code>Null</code> will be considered an error.
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return True if stated conditions met.
*/
public static boolean validateMinLength(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (!GenericValidator.isBlankOrNull(value)) {
try {
int min = Integer.parseInt(field.getVarValue("minlength"));
if (!GenericValidator.minLength(value, min)) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
} catch (Exception e) {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
}
return true;
}
/**
* Checks if a field has a valid url. Four optional variables can be
* specified to configure url validation.
* <ul>
* <li>Variable <code>allow2slashes</code> can be set to <code>true</code> or
* <code>false</code> to control whether two slashes are allowed -
* default is <code>false</code> (i.e. two slashes are NOT allowed).</li>
* <li>Variable <code>nofragments</code> can be set to <code>true</code> or
* <code>false</code> to control whether fragments are allowed -
* default is <code>false</code> (i.e. fragments ARE allowed).</li>
* <li>Variable <code>allowallschemes</code> can be set to <code>true</code> or
* <code>false</code> to control if all schemes are allowed - default
* is <code>false</code> (i.e. all schemes are NOT allowed).</li>
* <li>Variable <code>schemes</code> can be set to a comma delimited list of
* valid schemes. This value is ignored if <code>allowallschemes</code>
* is set to <code>true</code>. Default schemes allowed are "http",
* "https" and "ftp" if this variable is not specified.</li>
* </ul>
*
* @param bean The bean validation is being performed on.
* @param va The <code>ValidatorAction</code> that is currently being performed.
* @param field The <code>Field</code> object associated with the current
* field being validated.
* @param errors The <code>ActionMessages</code> object to add errors to if any
* validation errors occur.
* @param request Current request object.
* @return True if valid, false otherwise.
*/
public static boolean validateUrl(Object bean,
ValidatorAction va, Field field,
ActionMessages errors,
HttpServletRequest request) {
String value = null;
if (isString(bean)) {
value = (String) bean;
} else {
value = ValidatorUtils.getValueAsString(bean, field.getProperty());
}
if (GenericValidator.isBlankOrNull(value)) {
return true;
}
// Get the options and schemes Vars
boolean allowallschemes = "true".equalsIgnoreCase(field.getVarValue("allowallschemes"));
int options = allowallschemes ? UrlValidator.ALLOW_ALL_SCHEMES : 0;
if ("true".equalsIgnoreCase(field.getVarValue("allow2slashes"))) {
options += UrlValidator.ALLOW_2_SLASHES;
}
if ("true".equalsIgnoreCase(field.getVarValue("nofragments"))) {
options += UrlValidator.NO_FRAGMENTS;
}
String schemesVar = allowallschemes ? null : field.getVarValue("schemes");
// No options or schemes - use GenericValidator as default
if (options == 0 && schemesVar == null) {
if (GenericValidator.isUrl(value)) {
return true;
} else {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
}
// Parse comma delimited list of schemes into a String[]
String[] schemes = null;
if (schemesVar != null) {
StringTokenizer st = new StringTokenizer(schemesVar, ",");
schemes = new String[st.countTokens()];
int i = 0;
while (st.hasMoreTokens()) {
schemes[i++] = st.nextToken().trim();
}
}
// Create UrlValidator and validate with options/schemes
UrlValidator urlValidator = new UrlValidator(schemes, options);
if (urlValidator.isValid(value)) {
return true;
} else {
errors.add(field.getKey(), Resources.getActionMessage(request, va, field));
return false;
}
}
/**
* Return <code>true</code> if the specified object is a String or a <code>null</code>
* value.
*
* @param o Object to be tested
* @return The string value
*/
protected static boolean isString(Object o) {
return (o == null) ? true : String.class.isInstance(o);
}
}