org.codehaus.griffon.runtime.validation.constraints.EmailConstraint.java Source code

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Here is the source code for org.codehaus.griffon.runtime.validation.constraints.EmailConstraint.java

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/*
 * Copyright 2014-2015 the original author or 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.codehaus.griffon.runtime.validation.constraints;

import griffon.plugins.validation.Errors;
import org.apache.commons.validator.routines.EmailValidator;

import javax.annotation.Nonnull;

import static griffon.util.GriffonClassUtils.requireState;
import static griffon.util.GriffonNameUtils.isBlank;
import static java.util.Objects.requireNonNull;

/**
 * Validates an email address.
 *
 * @author Graeme Rocher (Grails 0.4)
 */
public class EmailConstraint extends AbstractConstraint {
    public static final String VALIDATION_DSL_NAME = "email";
    public static final String DEFAULT_INVALID_EMAIL_MESSAGE_CODE = "default.invalid.email.message";
    public static final String DEFAULT_INVALID_EMAIL_MESSAGE = "Property [{0}] of class [{1}] with value [{2}] is not a valid e-mail address";

    private boolean email;

    @Override
    public boolean supports(@Nonnull Class<?> type) {
        requireNonNull(type, "Argument 'type' must not be null");
        return CharSequence.class.isAssignableFrom(type);
    }

    @Override
    public void setParameter(@Nonnull Object constraintParameter) {
        requireState(constraintParameter instanceof Boolean,
                "Parameter for constraint [" + VALIDATION_DSL_NAME + "] of property [" + constraintPropertyName
                        + "] of class [" + constraintOwningClass + "] must be a boolean value");

        email = (Boolean) constraintParameter;
        super.setParameter(constraintParameter);
    }

    @Nonnull
    public String getName() {
        return VALIDATION_DSL_NAME;
    }

    @Override
    protected void processValidate(@Nonnull Object target, Object propertyValue, @Nonnull Errors errors) {
        if (!email) {
            return;
        }

        EmailValidator emailValidator = EmailValidator.getInstance();
        Object[] args = new Object[] { constraintPropertyName, constraintOwningClass, propertyValue };

        String value = propertyValue.toString();
        if (isBlank(value)) {
            return;
        }

        if (!emailValidator.isValid(value)) {
            rejectValue(target, errors, DEFAULT_INVALID_EMAIL_MESSAGE_CODE, VALIDATION_DSL_NAME + INVALID_SUFFIX,
                    args);
        }
    }
}