/*
 * Copyright 2004-2011 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.seasar.teeda.extension.validator;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.internal.FacesMessageUtil;
import javax.faces.internal.UIComponentUtil;
import javax.faces.validator.ValidatorException;

/**
 * @author shot
 */
public class TLessValidator extends AbstractCompareValidator {

    public static final String LR_MESSAGE_ID = "org.seasar.teeda.extension.validator.TLessValidator.LR";

    protected void doValidate(FacesContext context, UIComponent component,
            Object value, UIComponent targetComponent, Object targetValue)
            throws ValidatorException {
        if (targetValue == null) {
            return;
        }
        if (isGreaterEqualThan(value, targetValue)) {
            Object[] args = { UIComponentUtil.getLabel(targetComponent),
                    UIComponentUtil.getLabel(component) };
            String messaId = getMessageId();
            FacesMessage message = FacesMessageUtil.getMessage(context,
                    messaId, args);
            throw new ValidatorException(message, messaId, args);
        }
    }

    public String getMessageId() {
        String msg = super.getMessageId();
        return (msg != null) ? msg : LR_MESSAGE_ID;
    }

    private boolean isGreaterEqualThan(Object value, Object targetValue) {
        return (!(value instanceof Comparable))
                || ((Comparable) value).compareTo(targetValue) >= 0;
    }

}
