org.apache.taglibs.standard.tag.el.sql.DateParamTag Maven / Gradle / Ivy

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.taglibs.standard.tag.el.sql;

import java.util.Date;

import javax.servlet.jsp.JspException;

import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager;
import org.apache.taglibs.standard.tag.common.sql.DateParamTagSupport;

/**
 * Subclass for the JSTL library with EL support.
 *
 * @author Justyna Horwat
 */
public class DateParamTag extends DateParamTagSupport {

    private String valueEL;
    private String typeEL;

    public void setValue(String valueEL) {
        this.valueEL = valueEL;
    }

    public void setType(String typeEL) {
        this.typeEL = typeEL;
    }

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

    //*********************************************************************
    // Private utility methods

    // Evaluates expressions as necessary

    private void evaluateExpressions() throws JspException {
        if (valueEL != null) {
            value = (Date) ExpressionEvaluatorManager.evaluate(
                    "value", valueEL, Date.class, this, pageContext);
        }

        if (typeEL != null) {
            type = (String) ExpressionEvaluatorManager.evaluate(
                    "type", typeEL, String.class, this, pageContext);
        }
    }

}