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/*
 * $Id: ValidateLongRangeTag.java,v 1.19.4.1 2008/04/28 23:27:57 rlubke Exp $
 */

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
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 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
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 * Version 2] license."  If you don't indicate a single choice of license, a
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 */

// ValidateLongRangeTag.java

package com.sun.faces.taglib.jsf_core;

import javax.el.ELContext;
import javax.el.ValueExpression;
import javax.el.ExpressionFactory;
import javax.faces.context.FacesContext;
import javax.faces.validator.LongRangeValidator;
import javax.faces.validator.Validator;
import javax.servlet.jsp.JspException;

import com.sun.faces.el.ELUtils;

/**
 * ValidateLongRangeTag is the tag handler class for
 * validate_longrange tag.
 */

public class ValidateLongRangeTag extends MaxMinValidatorTag {

    private static final long serialVersionUID = 292617728229736800L;
    private static ValueExpression VALIDATOR_ID_EXPR = null;

// Attribute Instance Variables
    protected ValueExpression maximumExpression = null;
    protected ValueExpression minimumExpression = null;

    protected long maximum = 0;
    protected long minimum = 0;


// Relationship Instance Variables

//
// Constructors and Initializers    
//

    public ValidateLongRangeTag() {
        super();
        if (VALIDATOR_ID_EXPR == null) {
            FacesContext context = FacesContext.getCurrentInstance();
            ExpressionFactory factory =
                FacesContext.getCurrentInstance().getApplication().
                    getExpressionFactory();
            VALIDATOR_ID_EXPR =
                factory.createValueExpression(context.getELContext(),  
                                              "javax.faces.LongRange",
                                              String.class);
        }
    }

//
// Class methods
//

//
// General Methods
//

    public void setMaximum(ValueExpression newMaximum) {
        maximumSet = true;
        maximumExpression = newMaximum;
    }


    public void setMinimum(ValueExpression newMinimum) {
        minimumSet = true;
        minimumExpression = newMinimum;
    }

    public int doStartTag() throws JspException {
        super.setValidatorId(VALIDATOR_ID_EXPR);
        return super.doStartTag();
    }


// 
// Methods from ValidatorTag
//

    protected Validator createValidator() throws JspException {

        LongRangeValidator result = (LongRangeValidator)
            super.createValidator();
        assert (null != result);

        evaluateExpressions();
        if (maximumSet) {
            result.setMaximum(maximum);
        }

        if (minimumSet) {
            result.setMinimum(minimum);
        }

        return result;
    }

/* Evaluates expressions as necessary */
    private void evaluateExpressions() {

        ELContext context = FacesContext.getCurrentInstance().getELContext();

        if (minimumExpression != null) {
            if (!minimumExpression.isLiteralText()) {
                minimum = ((Number)
                              ELUtils.evaluateValueExpression(minimumExpression,
                                  context)).longValue();
            } else {
                minimum =
                Long.valueOf(minimumExpression.getExpressionString()).
                    longValue();
            }
        }
        if (maximumExpression != null) {
            if (!maximumExpression.isLiteralText()) {
                maximum = ((Number)
                              ELUtils.evaluateValueExpression(maximumExpression,
                                  context)).longValue();
            } else {
                maximum =
                Long.valueOf(maximumExpression.getExpressionString()).
                    longValue();
            }
        }
    }

} // end of class ValidateLongRangeTag