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JAXX Runtime api
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/*
 * *##% 
 * JAXX Runtime
 * Copyright (C) 2008 - 2009 CodeLutin
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * ##%*
 */
package jaxx.runtime.validator.field;

import com.opensymphony.xwork2.validator.ValidationException;
import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;

import java.io.File;

/**
 * 
 * NotExistingFileFieldValidator checks that a File field as a file does not exist. *
 * 
 * 
 * 

 * 
 * 

 * fieldName - The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required
 * 
 * 
 * 
 * 

 * 
 * 
 *     <validators>
 *         <!-- Plain-Validator Syntax -->
 *         <validator type="notExistingFile">
 *             <param name="fieldName">tmp</param>
 *             <message>tmp is an existing file</message>
 *         </validator>
 * 
 *         <!-- Field-Validator Syntax -->
 *         <field name="tmp">
 *         	  <field-validator type="notExistingFile">
 *                 <message>tmp is an existing file</message>
 *            </field-validator>
 *         </field>
 *     </validators>
 * 
 * 
 *
 * @author chemit
 */
public class NotExistingFileFieldValidator extends FieldValidatorSupport {

    @Override
    public void validate(Object object) throws ValidationException {
        String fieldName = getFieldName();
        Object value = this.getFieldValue(fieldName, object);
        if (value==null) {
            // no value defined
            addFieldError(fieldName, object);            
            return;
        }
        File f;
        if (value instanceof File) {
            f = (File) value;
        } else if (value instanceof String) {
            f = new File((String) value);
        } else {
            addFieldError(fieldName, object);
            return;
        }

        if (f.exists() || f.isDirectory()) {
            // f is not a file and exist
            addFieldError(fieldName, object);
        }
    }

    @Override
    public String getValidatorType() {
        return "notExistingFile";
    }
}