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API de l'application modulaire evasion-en-ligne

There is a newer version: 2.0.0.2

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.evasion.common.inputfile;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.FacesValidator;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;
import org.apache.commons.fileupload.FileItem;

/**
 *
 * @author sebastien.glon
 */
@FacesValidator(value = "fileValidator")
public class FileValidator implements Validator {
    /*
     * If you want to change the maximum size of the file to be uploaded, you can change the value for MAX_FILE_SIZE
     */

    private static final long MAX_FILE_SIZE = 10485760L; // 10MB.
    /*
     *you can change the extensions of the files to be uploaded
     */
    private static final String[] VALID_EXTENSIONS = {"jpg", "jpeg", "gif", "bmp", "png"}; //set valid formats

    @Override
    public void validate(FacesContext context, UIComponent component, Object value)
            throws ValidatorException {
        if (value != null) {
            final FileItem uploadedFile = (FileItem) value;
            final String extension = uploadedFile.getFieldName().substring(uploadedFile.getFieldName().lastIndexOf(".") + 1).toLowerCase();
            boolean valid = false;
            for (String ext : VALID_EXTENSIONS) {
                if (ext.equals(extension)) {
                    valid = true;
                    break;
                }
            }
            //check if the extension has been set to valid, if not throw an exception
            if (!valid) {
                uploadedFile.delete();
                throw new ValidatorException(new FacesMessage(String.format(
                        "Invalid file format, Reqired formats are of " + getValidExtensions())));
            }
            //check the files size
            if (uploadedFile.getSize() > MAX_FILE_SIZE) {
                uploadedFile.delete();
                throw new ValidatorException(new FacesMessage(String.format(
                        "File exceeds maximum permitted size of %d Kilo Bytes.", MAX_FILE_SIZE / 1024)));
            }
        }
    }

    private String getValidExtensions() {
        StringBuilder strExtensions = new StringBuilder();
        for (String ext : VALID_EXTENSIONS) {
            strExtensions.append(ext).append(" ,");
        }
        return strExtensions.substring(0, strExtensions.lastIndexOf(" ,"));
    }
}