/*
 * Copyright 2002-2006,2009 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 com.opensymphony.xwork2.validator.validators;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.conversion.impl.XWorkConverter;
import com.opensymphony.xwork2.validator.ValidationException;

import java.util.Map;


/**
 * <!-- START SNIPPET: javadoc -->
 * Field Validator that checks if a conversion error occured for this field.
 * <!-- END SNIPPET: javadoc -->
 * <p/>
 * <!-- START SNIPPET: parameters -->
 * <ul>
 *     <li>fieldName - The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required</li>
 * </ul>
 * <!-- END SNIPPET: parameters -->
 *
 * <!-- START SNIPPET: example -->
 * <pre>
 *     <!-- Plain Validator Syntax -->
 *     <validator type="conversion">
 *     		<param name="fieldName">myField</param>
 *          <message>Conversion Error Occurred</message>
 *     </validator>
 *      
 *     <!-- Field Validator Syntax -->
 *     <field name="myField">
 *        <field-validator type="conversion">
 *           <message>Conversion Error Occurred</message>
 *        </field-validator>
 *     </field>
 * </pre>
 * <!-- END SNIPPET: example -->
 *
 * @author Jason Carreira
 * @author tm_jee
 * 
 * @version $Date $Id$
 */
public class ConversionErrorFieldValidator extends RepopulateConversionErrorFieldValidatorSupport {

    /**
     * The validation implementation must guarantee that setValidatorContext will
     * be called with a non-null ValidatorContext before validate is called.
     *
     * @param object
     * @throws ValidationException
     */
    @Override
    public void doValidate(Object object) throws ValidationException {
        String fieldName = getFieldName();
        String fullFieldName = getValidatorContext().getFullFieldName(fieldName);
        ActionContext context = ActionContext.getContext();
        Map<String, Object> conversionErrors = context.getConversionErrors();
        
        if (conversionErrors.containsKey(fullFieldName)) {
            if ((defaultMessage == null) || ("".equals(defaultMessage.trim()))) {
                defaultMessage = XWorkConverter.getConversionErrorMessage(fullFieldName, context.getValueStack());
            }
            
            addFieldError(fieldName, object);
        }
    }
    
}