/** * Licensed under the Artistic License; you may not use this file * except in compliance with the License. * You may obtain a copy of the License at * *      http://displaytag.sourceforge.net/license.html * * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */package org.displaytag.tags.el;import javax.servlet.jsp.JspException;import org.displaytag.tags.SetPropertyTag;/** * Adds EL support to SetPropertyTag. * @author Fabrizio Giustina * @version $Revision: 1081 $ ($Author: fgiust $) */public class ELSetPropertyTag extends SetPropertyTag{    /**     * D1597A17A6.     */    private static final long serialVersionUID = 899149338534L;    /**     * Expression for the "name" tag attribute.     */    private String nameExpr;    /**     * Expression for the "value" tag attribute.     */    private String valueExpr;    /**     * @see org.displaytag.tags.SetPropertyTag#setName(java.lang.String)     */    public void setName(String value)    {        nameExpr = value;    }    /**     * @see org.displaytag.tags.SetPropertyTag#setValue(java.lang.String)     */    public void setValue(String value)    {        valueExpr = value;    }    /**     * @see javax.servlet.jsp.tagext.Tag#doStartTag()     */    public int doStartTag() throws JspException    {        evaluateExpressions();        return super.doStartTag();    }    /**     * Evaluates the expressions for all the given attributes and pass results up to the parent tag.     * @throws JspException for exceptions occurred during evaluation.     */    private void evaluateExpressions() throws JspException    {        ExpressionEvaluator eval = new ExpressionEvaluator(this, pageContext);        super.setName(eval.evalString("name", nameExpr)); //$NON-NLS-1$        if (valueExpr != null)        {            super.setValue(eval.evalString("value", valueExpr)); //$NON-NLS-1$        }    }    /**     * @see javax.servlet.jsp.tagext.Tag#release()     */    public void release()    {        super.release();        this.nameExpr = null;        this.valueExpr = null;    }}