org.tonguetied.web.ImportValidator.java Source code

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Here is the source code for org.tonguetied.web.ImportValidator.java

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/*
 * Copyright 2008 The Tongue-Tied Authors
 * 
 * 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 org.tonguetied.web;

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;
import org.tonguetied.datatransfer.common.ImportParameters;

/**
 * Class used to verify the user input of data entered for the import feature.
 * 
 * @author bsion
 * 
 */
public class ImportValidator implements Validator {

    static final String FIELD_FILE_NAME = "fileUploadBean.file.name";
    static final String FIELD_FORMAT_TYPE = "parameters.formatType";
    static final String FIELD_TRANSLATION_STATE = "parameters.translationState";

    /*
     * (non-Javadoc)
     * 
     * @see org.springframework.validation.Validator#supports(java.lang.Class)
     */
    public boolean supports(Class klass) {
        return ImportBean.class.isAssignableFrom(klass);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.springframework.validation.Validator#validate(java.lang.Object,
     *      org.springframework.validation.Errors)
     */
    public void validate(Object target, Errors errors) {
        ImportBean importBean = (ImportBean) target;
        validate(importBean.getFileUploadBean(), errors);
        validate(importBean.getParameters(), errors);
    }

    /**
     * Validate the {@link ImportParameters} of the {@link ImportBean} for
     * erroneous input.
     * 
     * @param parameters the import parameters to validate
     * @param errors the errors object
     */
    private void validate(ImportParameters parameters, Errors errors) {
        ValidationUtils.rejectIfEmpty(errors, FIELD_FORMAT_TYPE, "error.import.type.required");
        ValidationUtils.rejectIfEmpty(errors, FIELD_TRANSLATION_STATE, "error.import.state.required");
    }

    /**
     * Validate the {@link FileUploadBean} of the {@link ImportBean} for
     * erroneous input.
     * 
     * @param fileUploadBean the object container of the file to validate
     * @param errors the errors object
     */
    private void validate(FileUploadBean fileUploadBean, Errors errors) {
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, FIELD_FILE_NAME, fileUploadBean.getFile().getName());
    }
}