jaxx.runtime.validator.field.ExistingDirectoryFieldValidator Maven / Gradle / Ivy

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package jaxx.runtime.validator.field;

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

import java.io.File;

/**
 * 
 * ExistingDirectoryFieldValidator checks that a File field exists and is a directory.
 * 
 * 
 * 

 * 
 * 

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

 * 
 * 
 *     <validators>
 *         <!-- Plain-Validator Syntax -->
 *         <validator type="existingDirectory">
 *             <param name="fieldName">tmp</param>
 *             <message>tmp is not an existing directory</message>
 *         </validator>
 * 
 *         <!-- Field-Validator Syntax -->
 *         <field name="tmp">
 *         	  <field-validator type="existingDirectory">
 *                 <message>tmp is not an existing directory</message>
 *            </field-validator>
 *         </field>
 *     </validators>
 * 
 * 
 *
 * @author chemit
 */
public class ExistingDirectoryFieldValidator extends FieldValidatorSupport {

    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.isDirectory() && f.exists())) {
            // f is not a directory, nor exists
            addFieldError(fieldName, object);
        }
    }

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