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/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the License).  You may not use this file except in
 * compliance with the License.
 * 
 * You can obtain a copy of the license at
 * https://woodstock.dev.java.net/public/CDDLv1.0.html.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at https://woodstock.dev.java.net/public/CDDLv1.0.html.
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * you own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 * 
 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
 */

/*
 * StringLengthValidator.java
 *
 * Created on February 11, 2005, 9:58 AM
 */
package com.sun.webui.jsf.validator;

import java.text.MessageFormat;
import java.util.Date;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;
import com.sun.webui.jsf.util.ConversionUtilities;
import com.sun.webui.jsf.util.ThemeUtilities;
import com.sun.webui.jsf.component.DateManager;

/**
 *  	Use this validator to check the number of characters in a string when
 *	you need to set the validation messages.
 *
 * @author avk
 */
public class DateInRangeValidator implements Validator {

    /**
     * The converter id for this converter.
     */
    public static final String VALIDATOR_ID = "com.sun.webui.jsf.DateInRange";
    private static final boolean DEBUG = false;

    /** Creates a new instance of StringLengthValidator */
    public DateInRangeValidator() {
    }

    /**
     *	 Validate the value with regard to a UIComponent and a
     *	    FacesContext.
     *
     *	@param	context	    The FacesContext
     *	@param	component   The component to be validated
     *	@param	value	    The submitted value of the component
     *
     * @exception ValidatorException if the value is not valid
     */
    public void validate(FacesContext context,
            UIComponent component,
            Object value) throws ValidatorException {

        //log("validate()" + String.valueOf(value)); 
        if ((context == null) || (component == null)) {
            //if(DEBUG) log("\tContext or component is null");
            throw new NullPointerException();
        }

        if (!(value instanceof Date)) {
            return;
        }

        DateManager dateManager = null;
        if (component instanceof DateManager) {
            dateManager = (DateManager) component;
        } else if (component.getParent() instanceof DateManager) {
            dateManager = (DateManager) (component.getParent());
        }
        if (dateManager == null) {
            //log("Didn't find a DateManager " + component.getClass().toString()); 
            return;
        }

        Date date = (Date) value;
        Date minDate = dateManager.getFirstAvailableDate();
        if (minDate != null && date.before(minDate)) {
            //log("Date is before minDAte!"); 
            FacesMessage msg = getFacesMessage(component, context, minDate,
                    "DateInRangeValidator.after");
            throw new ValidatorException(msg);
        }
        Date maxDate = dateManager.getLastAvailableDate();
        if (maxDate != null && maxDate.before(date)) {
            //log("Date is after maxDAte!"); 
            FacesMessage msg = getFacesMessage(component, context, maxDate,
                    "DateInRangeValidator.before");
            throw new ValidatorException(msg);

        }
    }

    private FacesMessage getFacesMessage(UIComponent component,
            FacesContext context,
            Date date, String key) {

        String message = ThemeUtilities.getTheme(context).getMessage(key);
        String arg = ConversionUtilities.convertValueToString(component, date);
        MessageFormat mf = new MessageFormat(message,
                context.getViewRoot().getLocale());
        Object[] params = {arg};
        return new FacesMessage(mf.format(params));
    }

    private void log(String s) {
        System.out.println(this.getClass().getName() + "::" + s); //NOI18N
    }
}