com.persistent.cloudninja.validator.LogoFileDTOValidator.java Source code

Introduction

Here is the source code for com.persistent.cloudninja.validator.LogoFileDTOValidator.java

Source

/*******************************************************************************
 * Copyright 2012 Persistent Systems Ltd.
 * 
 * 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.persistent.cloudninja.validator;

import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
import org.springframework.web.multipart.MultipartFile;

import com.persistent.cloudninja.transferObjects.LogoFileDTO;

/**
 * Validator class for LogoFile. 
 *
 */
@Component("logoFileDTOValidator")
public class LogoFileDTOValidator implements Validator {

    @Override
    public boolean supports(Class<?> clazz) {
        return LogoFileDTO.class.isAssignableFrom(clazz);
    }

    /**
     * validates the multipart file.
     * 
     * @param target : LogoFile object.
     * @param errors : stores and exposes validation errors.
     * 
     */
    @Override
    public void validate(Object target, Errors errors) {
        LogoFileDTO logoFile = (LogoFileDTO) target;
        MultipartFile file = logoFile.getFile(); // file should be of gif, png, bmp, jpeg, jpg type
        if (file.isEmpty()) {
            errors.rejectValue("file", "Invalid file", "File cannot be empty");
        } else if (!(file.getOriginalFilename().endsWith(".gif") | file.getOriginalFilename().endsWith(".png")
                | file.getOriginalFilename().endsWith(".bmp") | file.getOriginalFilename().endsWith(".jpeg")
                | file.getOriginalFilename().endsWith(".jpg"))) {
            errors.rejectValue("file", "Invalid file", "File should be a valid gif,png, bmp, jpeg or jpg file.");
        } else if (logoFile.getFile().getSize() > 200 * 1024) {
            errors.rejectValue("file", "Invalid file", "File size should be less then 200KB.");
        }
    }

}