/*

  * 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.core.taglib.core;

 import javax.faces.context.FacesContext;

 import javax.faces.el.ValueBinding;

 import javax.faces.internal.ValueBindingUtil;

 import javax.faces.validator.LengthValidator;

 import javax.faces.validator.Validator;

 import javax.servlet.jsp.JspException;

 import org.seasar.framework.util.AssertionUtil;

 import org.seasar.teeda.core.util.BindingUtil;

 import org.seasar.teeda.core.util.ConverterUtil;

 /**

  * @author yone

  * @author shot

  */

 public class ValidateLengthTag extends MaxMinValidatorTag {

     private static final long serialVersionUID = 1L;

     private static final String VALIDATOR_ID = LengthValidator.VALIDATOR_ID;

     protected int minimum = 0;

     protected int maximum = 0;

     public ValidateLengthTag() {

         super();

     }

     protected Validator createValidator() throws JspException {

         super.setValidatorId(VALIDATOR_ID);

         LengthValidator validator = (LengthValidator) super.createValidator();

         AssertionUtil.assertNotNull("LengthValidator", validator);

         evaluateExpressions();

         if (isMinimumSet()) {

             validator.setMinimum(minimum);

         }

         if (isMaximumSet()) {

             validator.setMaximum(maximum);

         }

         return validator;

     }

     private void evaluateExpressions() throws JspException {

         FacesContext context = FacesContext.getCurrentInstance();

         final String min = getMinimum();

         if (min != null) {

             if (BindingUtil.isValueReference(min)) {

                 ValueBinding vb = ValueBindingUtil.createValueBinding(context,

                         min);

                 minimum = ConverterUtil.convertToInt(vb.getValue(context));

             } else {

                 minimum = ConverterUtil.convertToInt(min);

             }

         }

         final String max = getMaximum();

         if (max != null) {

             if (BindingUtil.isValueReference(max)) {

                 ValueBinding vb = context.getApplication().createValueBinding(

                         max);

                 maximum = ConverterUtil.convertToInt(vb.getValue(context));

             } else {

                 maximum = ConverterUtil.convertToInt(max);

             }

         }

     }

 }