EmailValidator.java

/*
 * Copyright 2009 Prime Technology.
 *
 * 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.primefaces.examples.validate;

import java.util.Map;
import java.util.regex.Pattern;
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.primefaces.validate.ClientValidator;

/**
 * Custom JSF Validator for Email input
 */
@FacesValidator("custom.emailValidator")
public class EmailValidator implements Validator, ClientValidator {

    private Pattern pattern;
 
	private static final String EMAIL_PATTERN = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
                                                + "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
 
	public EmailValidator() {
		pattern = Pattern.compile(EMAIL_PATTERN);
	}

    public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
        if(value == null) {
            return;
        }
        
        if(!pattern.matcher(value.toString()).matches()) {
            throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Validation Error", 
                        value + " is not a valid email;"));
        }
    }

    public Map<String, Object> getMetadata() {
        return null;
    }

    public String getValidatorId() {
        return "custom.emailValidator";
    }
    
}