elformtag.java

jakarta-struts-1.2.4-src

/*
 * $Header: /home/cvs/jakarta-struts/contrib/struts-el/src/share/org/apache/strutsel/taglib/html/ELFormTag.java,v 1.14 2004/07/24 02:40:53 niallp Exp $
 * $Revision: 1.14 $
 * $Date: 2004/07/24 02:40:53 $
 *
 * Copyright 1999-2004 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.strutsel.taglib.html;

import org.apache.struts.taglib.html.FormTag;
import javax.servlet.jsp.JspException;
import org.apache.strutsel.taglib.utils.EvalHelper;

/**
 * Custom tag that represents an input form, associated with a bean whose
 * properties correspond to the various fields of the form.
 *<p>
 * This class is a subclass of the class
 * <code>org.apache.struts.taglib.html.FormTag</code> which provides most of
 * the described functionality.  This subclass allows all attribute values to
 * be specified as expressions utilizing the JavaServer Pages Standard Library
 * expression language.
 *
 * @version $Revision: 1.14 $
 */
public class ELFormTag extends FormTag {

    /**
     * Instance variable mapped to "action" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String actionExpr;
    /**
     * Instance variable mapped to "enctype" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String enctypeExpr;
    /**
     * Instance variable mapped to "focus" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String focusExpr;
    /**
     * Instance variable mapped to "focusIndex" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String focusIndexExpr;
    /**
     * Instance variable mapped to "method" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String methodExpr;
    /**
     * Instance variable mapped to "onreset" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String onresetExpr;
    /**
     * Instance variable mapped to "onsubmit" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String onsubmitExpr;
    /**
     * Instance variable mapped to "scriptLanguage" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String scriptLanguageExpr;
    /**
     * Instance variable mapped to "style" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String styleExpr;
    /**
     * Instance variable mapped to "styleClass" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String styleClassExpr;
    /**
     * Instance variable mapped to "styleId" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String styleIdExpr;
    /**
     * Instance variable mapped to "target" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String targetExpr;
    /**
     * Instance variable mapped to "acceptCharset" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    private String acceptCharsetExpr;

    /**
     * Getter method for "action" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getActionExpr() { return (actionExpr); }
    /**
     * Getter method for "enctype" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getEnctypeExpr() { return (enctypeExpr); }
    /**
     * Getter method for "focus" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getFocusExpr() { return (focusExpr); }
    /**
     * Getter method for "focusIndex" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getFocusIndexExpr() { return (focusIndexExpr); }
    /**
     * Getter method for "method" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getMethodExpr() { return (methodExpr); }
    /**
     * Getter method for "onreset" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getOnresetExpr() { return (onresetExpr); }
    /**
     * Getter method for "onsubmit" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getOnsubmitExpr() { return (onsubmitExpr); }
    /**
     * Getter method for "scriptLanguage" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getScriptLanguageExpr() { return (scriptLanguageExpr); }
    /**
     * Getter method for "style" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getStyleExpr() { return (styleExpr); }
    /**
     * Getter method for "styleClass" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getStyleClassExpr() { return (styleClassExpr); }
    /**
     * Getter method for "styleId" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getStyleIdExpr() { return (styleIdExpr); }
    /**
     * Getter method for "target" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getTargetExpr() { return (targetExpr); }
    /**
     * Getter method for "acceptCharset" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public String getAcceptCharsetExpr() { return (acceptCharsetExpr); }

    /**
     * Setter method for "action" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setActionExpr(String actionExpr) { this.actionExpr = actionExpr; }
    /**
     * Setter method for "enctype" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setEnctypeExpr(String enctypeExpr) { this.enctypeExpr = enctypeExpr; }
    /**
     * Setter method for "focus" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setFocusExpr(String focusExpr) { this.focusExpr = focusExpr; }
    /**
     * Setter method for "focusIndex" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setFocusIndexExpr(String focusIndexExpr) { this.focusIndexExpr = focusIndexExpr; }
    /**
     * Setter method for "method" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setMethodExpr(String methodExpr) { this.methodExpr = methodExpr; }
    /**
     * Setter method for "onreset" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setOnresetExpr(String onresetExpr) { this.onresetExpr = onresetExpr; }
    /**
     * Setter method for "onsubmit" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setOnsubmitExpr(String onsubmitExpr) { this.onsubmitExpr = onsubmitExpr; }
    /**
     * Setter method for "scriptLanguage" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setScriptLanguageExpr(String scriptLanguageExpr) { this.scriptLanguageExpr = scriptLanguageExpr; }
    /**
     * Setter method for "style" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setStyleExpr(String styleExpr) { this.styleExpr = styleExpr; }
    /**
     * Setter method for "styleClass" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setStyleClassExpr(String styleClassExpr) { this.styleClassExpr = styleClassExpr; }
    /**
     * Setter method for "styleId" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setStyleIdExpr(String styleIdExpr) { this.styleIdExpr = styleIdExpr; }
    /**
     * Setter method for "target" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setTargetExpr(String targetExpr) { this.targetExpr = targetExpr; }
    /**
     * Setter method for "acceptCharset" tag attribute.
     * (Mapping set in associated BeanInfo class.)
     */
    public void setAcceptCharsetExpr(String acceptCharsetExpr) { this.acceptCharsetExpr = acceptCharsetExpr; }

    /**
     * Resets attribute values for tag reuse.
     */
    public void release()
    {
        super.release();
        setActionExpr(null);
        setEnctypeExpr(null);
        setFocusExpr(null);
        setFocusIndexExpr(null);
        setMethodExpr(null);
        setOnresetExpr(null);
        setOnsubmitExpr(null);
        setScriptLanguageExpr(null);
        setStyleExpr(null);
        setStyleClassExpr(null);
        setStyleIdExpr(null);
        setTargetExpr(null);
        setAcceptCharsetExpr(null);
    }
    
    /**
     * Process the start tag.
     *
     * @exception JspException if a JSP exception has occurred
     */
    public int doStartTag() throws JspException {
        evaluateExpressions();
        return(super.doStartTag());
    }

    /**
     * Processes all attribute values which use the JSTL expression evaluation
     * engine to determine their values.
     *
     * @exception JspException if a JSP exception has occurred
     */
    private void evaluateExpressions() throws JspException {
        String  string  = null;
        Boolean bool    = null;

        if ((string = EvalHelper.evalString("action", getActionExpr(),
                                            this, pageContext)) != null)
            setAction(string);

        if ((string = EvalHelper.evalString("enctype", getEnctypeExpr(),
                                            this, pageContext)) != null)
            setEnctype(string);

        if ((string = EvalHelper.evalString("focus", getFocusExpr(),
                                            this, pageContext)) != null)
            setFocus(string);

        if ((string = EvalHelper.evalString("focusIndex", getFocusIndexExpr(),
                                            this, pageContext)) != null)
            setFocusIndex(string);

        if ((string = EvalHelper.evalString("method", getMethodExpr(),
                                            this, pageContext)) != null)
            setMethod(string);

        if ((string = EvalHelper.evalString("onreset", getOnresetExpr(),
                                            this, pageContext)) != null)
            setOnreset(string);

        if ((string = EvalHelper.evalString("onsubmit", getOnsubmitExpr(),
                                            this, pageContext)) != null)
            setOnsubmit(string);

       if ((bool = EvalHelper.evalBoolean("scriptLanguage", getScriptLanguageExpr(),
                                          this, pageContext)) != null)
           setScriptLanguage(bool.booleanValue());

        if ((string = EvalHelper.evalString("style", getStyleExpr(),
                                            this, pageContext)) != null)
            setStyle(string);

        if ((string = EvalHelper.evalString("styleClass", getStyleClassExpr(),
                                            this, pageContext)) != null)
            setStyleClass(string);

        if ((string = EvalHelper.evalString("styleId", getStyleIdExpr(),
                                            this, pageContext)) != null)
            setStyleId(string);

        if ((string = EvalHelper.evalString("target", getTargetExpr(),
                                            this, pageContext)) != null)
            setTarget(string);

        if ((string = EvalHelper.evalString("acceptCharset", getAcceptCharsetExpr(),
                                            this, pageContext)) != null)
            setAcceptCharset(string);

    }
}