eloptiontag.java

structs源码

/*
 * $Id: ELOptionTag.java 479635 2006-11-27 14:27:18Z pbenedict $
 *
 * 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.strutsel.taglib.html;

import org.apache.struts.taglib.html.OptionTag;
import org.apache.strutsel.taglib.utils.EvalHelper;

import javax.servlet.jsp.JspException;

/**
 * Tag for select options.  The body of this tag is presented to the user in
 * the option list, while the value attribute is the value returned to the
 * server if this option is selected. <p> This class is a subclass of the
 * class <code>org.apache.struts.taglib.html.OptionTag</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 $Rev: 479635 $
 */
public class ELOptionTag extends OptionTag {
    /**
     * Instance variable mapped to "bundle" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String bundleExpr;

    /**
     * Instance variable mapped to "dir" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String dirExpr;

    /**
     * Instance variable mapped to "disabled" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String disabledExpr;

    /**
     * Instance variable mapped to "filter" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String filterExpr;

    /**
     * Instance variable mapped to "lang" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String langExpr;

    /**
     * Instance variable mapped to "key" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String keyExpr;

    /**
     * Instance variable mapped to "locale" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String localeExpr;

    /**
     * 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 "value" tag attribute. (Mapping set in
     * associated BeanInfo class.)
     */
    private String valueExpr;

    /**
     * Getter method for "bundle" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getBundleExpr() {
        return (bundleExpr);
    }

    /**
     * Getter method for "dir" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getDirExpr() {
        return (dirExpr);
    }

    /**
     * Getter method for "disabled" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getDisabledExpr() {
        return (disabledExpr);
    }

    /**
     * Getter method for "filter" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getFilterExpr() {
        return (filterExpr);
    }

    /**
     * Getter method for "lang" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getLangExpr() {
        return (langExpr);
    }

    /**
     * Getter method for "key" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getKeyExpr() {
        return (keyExpr);
    }

    /**
     * Getter method for "locale" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getLocaleExpr() {
        return (localeExpr);
    }

    /**
     * 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 "value" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public String getValueExpr() {
        return (valueExpr);
    }

    /**
     * Setter method for "bundle" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setBundleExpr(String bundleExpr) {
        this.bundleExpr = bundleExpr;
    }

    /**
     * Setter method for "dir" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setDirExpr(String dirExpr) {
        this.dirExpr = dirExpr;
    }

    /**
     * Setter method for "disabled" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setDisabledExpr(String disabledExpr) {
        this.disabledExpr = disabledExpr;
    }

    /**
     * Setter method for "filter" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setFilterExpr(String filterExpr) {
        this.filterExpr = filterExpr;
    }

    /**
     * Setter method for "key" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setKeyExpr(String keyExpr) {
        this.keyExpr = keyExpr;
    }

    /**
     * Setter method for "lang" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setLangExpr(String langExpr) {
        this.langExpr = langExpr;
    }

    /**
     * Setter method for "locale" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setLocaleExpr(String localeExpr) {
        this.localeExpr = localeExpr;
    }

    /**
     * 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 "value" tag attribute. (Mapping set in associated
     * BeanInfo class.)
     */
    public void setValueExpr(String valueExpr) {
        this.valueExpr = valueExpr;
    }

    /**
     * Resets attribute values for tag reuse.
     */
    public void release() {
        super.release();
        setBundleExpr(null);
        setDirExpr(null);
        setDisabledExpr(null);
        setFilterExpr(null);
        setLangExpr(null);
        setKeyExpr(null);
        setLocaleExpr(null);
        setStyleExpr(null);
        setStyleClassExpr(null);
        setStyleIdExpr(null);
        setValueExpr(null);
    }

    /**
     * Process the start tag.
     *
     * @throws 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.
     *
     * @throws JspException if a JSP exception has occurred
     */
    private void evaluateExpressions()
        throws JspException {
        String string = null;
        Boolean bool = null;

        if ((string =
                EvalHelper.evalString("bundle", getBundleExpr(), this,
                    pageContext)) != null) {
            setBundle(string);
        }

        if ((string =
        		EvalHelper.evalString("dir", getDirExpr(), this,
        			pageContext)) != null) {
        	setDir(string);
        }
        
        if ((bool =
                EvalHelper.evalBoolean("disabled", getDisabledExpr(), this,
                    pageContext)) != null) {
            setDisabled(bool.booleanValue());
        }

        if ((bool =
                EvalHelper.evalBoolean("filter", getFilterExpr(), this,
                    pageContext)) != null) {
            setFilter(bool.booleanValue());
        }

        if ((string =
            	EvalHelper.evalString("lang", getLangExpr(), this,
            		pageContext)) != null) {
        	setLang(string);
        }

        if ((string =
                EvalHelper.evalString("key", getKeyExpr(), this, pageContext)) != null) {
            setKey(string);
        }

        if ((string =
                EvalHelper.evalString("locale", getLocaleExpr(), this,
                    pageContext)) != null) {
            setLocale(string);
        }

        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("value", getValueExpr(), this, pageContext)) != null) {
            setValue(string);
        }
    }
}