/*
* $Id: DynaValidatorForm.java 471754 2006-11-06 14:55:09Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.commons.beanutils.DynaBean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.validator.Validator;
import org.apache.commons.validator.ValidatorException;
import org.apache.commons.validator.ValidatorResults;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import java.io.Serializable;
import java.util.Map;
/**
* <p>This class extends <strong>DynaActionForm</strong> and provides basic
* field validation based on an XML file. The key passed into the validator
* is the action element's 'name' attribute from the struts-config.xml which
* should match the form element's name attribute in the validation.xml.</p>
*
* <ul>
*
* <li>See <code>ValidatorPlugin</code> definition in struts-config.xml for
* validation rules.</li>
*
* </ul>
*
* @version $Rev: 471754 $ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
* $
* @see org.apache.struts.action.ActionForm
* @since Struts 1.1
*/
public class DynaValidatorForm extends DynaActionForm implements DynaBean,
Serializable {
/**
* Commons Logging instance.
*/
private static Log log = LogFactory.getLog(DynaValidatorForm.class);
/**
* The results returned from the validation performed by the
* <code>Validator</code>.
*/
protected ValidatorResults validatorResults = null;
/**
* Used to indicate the current page of a multi-page form.
*/
protected int page = 0;
/**
* Gets page.
*
* @return page number.
*/
public int getPage() {
return page;
}
/**
* Sets page.
*
* @param page page number
*/
public void setPage(int page) {
this.page = page;
}
/**
* Validate the properties that have been set from this HTTP request, and
* return an <code>ActionErrors</code> object that encapsulates any
* validation errors that have been found. If no errors are found, return
* <code>null</code> or an <code>ActionErrors</code> object with no
* recorded error messages.
*
* @param mapping The mapping used to select this instance.
* @param request The servlet request we are processing.
* @return <code>ActionErrors</code> object that encapsulates any
* validation errors.
*/
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
this.setPageFromDynaProperty();
ServletContext application = getServlet().getServletContext();
ActionErrors errors = new ActionErrors();
String validationKey = getValidationKey(mapping, request);
Validator validator =
Resources.initValidator(validationKey, this, application, request,
errors, page);
try {
validatorResults = validator.validate();
} catch (ValidatorException e) {
log.error(e.getMessage(), e);
}
return errors;
}
/**
* Returns the Validation key.
*
* @param mapping The mapping used to select this instance
* @param request The servlet request we are processing
* @return validation key - the form element's name in this case
*/
public String getValidationKey(ActionMapping mapping,
HttpServletRequest request) {
return mapping.getAttribute();
}
/**
* Sets this.page to the value of the Dyna property "page" if it's
* defined. This is used to setup the page variable before validation
* starts.
*
* @since Struts 1.2
*/
protected void setPageFromDynaProperty() {
Map props = this.getMap();
if (props.containsKey("page")) {
Integer p = null;
try {
p = (Integer) props.get("page");
} catch (ClassCastException e) {
log.error("Dyna 'page' property must be of type java.lang.Integer.",
e);
throw e;
}
if (p == null) {
throw new NullPointerException(
"Dyna 'page' property must not be null. "
+ " Either provide an initial value or set 'convertNull' to false. ");
}
this.page = p.intValue();
}
}
/**
* Reset all properties to their default values.
*
* @param mapping The mapping used to select this instance
* @param request The servlet request we are processing
*/
public void reset(ActionMapping mapping, HttpServletRequest request) {
super.reset(mapping, request);
page = 0;
validatorResults = null;
}
/**
* Get results of the validation performed by the <code>Validator</code>.
*
* @return validator results as ValidatorResults object
*/
public ValidatorResults getValidatorResults() {
return validatorResults;
}
/**
* Set results of the validation performed by the <code>Validator</code>.
*
* @param validatorResults Set results of the validation performed
*/
public void setValidatorResults(ValidatorResults validatorResults) {
this.validatorResults = validatorResults;
}
/**
* Returns a <code>Map</code> of values returned from any validation that
* returns a value other than <code>null</code> or <code>Boolean</code>
* with the key the full property path of the field.
*
* @return Returns a <code>Map</code> of values, otherwise returns null if
* no results.
*/
public Map getResultValueMap() {
return ((validatorResults != null)
? validatorResults.getResultValueMap() : null);
}
}