AbstractValidator.java

/*
 * Copyright 2004-2010 the Seasar Foundation and the Others.
 *
 * 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.slim3.controller.validator;

import java.util.MissingResourceException;

import org.slim3.util.ApplicationMessage;

/**
 * An abstract class to validate an input value.
 * 
 * @author higa
 * @since 1.0.0
 * 
 */
public abstract class AbstractValidator implements Validator {

    /**
     * The error message.
     */
    protected String message;

    /**
     * Constructor.
     */
    public AbstractValidator() {
    }

    /**
     * Constructor.
     * 
     * @param message
     *            the error message
     */
    public AbstractValidator(String message) {
        this.message = message;
    }

    /**
     * Returns the message key.
     * 
     * @return the message key
     */
    protected abstract String getMessageKey();

    /**
     * Returns the label.
     * 
     * @param name
     *            the name
     * @return the label
     */
    protected String getLabel(String name) {
        try {
            String label = ApplicationMessage.get("label." + name);
            if (label != null) {
                return label;
            }
        } catch (MissingResourceException ignore) {
        }
        return name;
    }
}