validatelengthtag.java

一个使用struts+hibernate+spring开发的完的网站源代码。

/*
 * Copyright 2004 The Apache Software Foundation.
 * 
 * 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.apache.myfaces.taglib.core;

import org.apache.myfaces.convert.ConverterUtils;

import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.faces.validator.LengthValidator;
import javax.faces.validator.Validator;
import javax.faces.webapp.UIComponentTag;
import javax.faces.webapp.ValidatorTag;
import javax.servlet.jsp.JspException;

/**
 * @author Thomas Spiegl (latest modification by $Author: matze $)
 * @author Manfred Geiler
 * @version $Revision: 1.11 $ $Date: 2004/10/13 11:51:00 $
 */
public class ValidateLengthTag
    extends ValidatorTag
{
    private String _minimum = null;
    private String _maximum = null;

    private static final String VALIDATOR_ID = "javax.faces.Length";

    public void release()
    {
        _minimum = null;
        _maximum  = null;
    }

    public void setMinimum(String minimum)
    {
        _minimum = minimum;
    }

    public void setMaximum(String maximum)
    {
        _maximum = maximum;
    }

    protected Validator createValidator()
        throws JspException
    {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        setValidatorId(VALIDATOR_ID);
        LengthValidator validator = (LengthValidator)super.createValidator();
        if (_minimum != null)
        {
            if (UIComponentTag.isValueReference(_minimum))
            {
                ValueBinding vb = facesContext.getApplication().createValueBinding(_minimum);
                validator.setMinimum(ConverterUtils.convertToInt(vb.getValue(facesContext)));
            }
            else
            {
                validator.setMinimum(ConverterUtils.convertToInt(_minimum));
            }
        }
        if (_maximum != null)
        {
            if (UIComponentTag.isValueReference(_maximum))
            {
                ValueBinding vb = facesContext.getApplication().createValueBinding(_maximum);
                validator.setMaximum(ConverterUtils.convertToInt(vb.getValue(facesContext)));
            }
            else
            {
                validator.setMaximum(ConverterUtils.convertToInt(_maximum));
            }
        }
        return validator;
    }


}