formtag.java

分页查询控件 分页查询控件

/*
 * Copyright 2004 original author or authors.
 *
 * 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.extremecomponents.table.tag;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

import org.apache.commons.lang.StringUtils;
import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager;
import org.extremecomponents.base.BaseModel;
import org.extremecomponents.table.bean.Attributes;
import org.extremecomponents.table.bean.Form;
import org.extremecomponents.table.core.TableProperties;

/**
 * @jsp.tag name="form" display-name="FormTag" body-content="JSP" description="A
 *          form can be placed in the body of the table."
 * 
 * @author Jeff Johnston
 */
public class FormTag extends TagSupport implements ExtendedAttributes {
    private static final long serialVersionUID = 573881459303927870L;
    
    private String name;
    private String action;
    private String method;
    private String onsubmit;

    public BaseModel getModel() {
        TableTag tableTag = (TableTag) findAncestorWithClass(this, TableTag.class);
        return tableTag.getModel();
    }

    /**
     * @jsp.attribute description="Define a form name." required="true"
     *                rtexprvalue="true"
     */
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    /**
     * @jsp.attribute description="Define a form action." required="true"
     *                rtexprvalue="true"
     */
    public String getAction() {
        return action;
    }

    public void setAction(String action) {
        this.action = action;
    }

    /**
     * @jsp.attribute description="Define a form method." required="false"
     *                rtexprvalue="true"
     */
    public String getMethod() {
        if (StringUtils.isBlank(method)) {
            return getModel().getProperties().getProperty(TableProperties.METHOD);
        }

        return method;
    }

    public void setMethod(String method) {
        this.method = method;
    }

    /**
     * @jsp.attribute description="Define a form onsubmit." required="false"
     *                rtexprvalue="true"
     */
    public String getOnsubmit() {
        return onsubmit;
    }

    public void setOnsubmit(String onsubmit) {
        this.onsubmit = onsubmit;
    }

    public int doStartTag()
            throws JspException {
        TableTag tableTag = (TableTag) findAncestorWithClass(this, TableTag.class);

        if (tableTag.getRowCount() > 0) //only go through the first pass
        {
            return SKIP_BODY;
        }

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

        Form form = new Form();
        form.addAttribute(Form.NAME, getName());
        form.addAttribute(Form.ACTION, getAction());
        form.addAttribute(Form.METHOD, getMethod());
        form.addAttribute(Form.ONSUBMIT, getOnsubmit());
        addExtendedAttributes(form);
        tableTag.addForm(form);

        return EVAL_BODY_INCLUDE;
    }

    public void addExtendedAttributes(Attributes attributes)
            throws JspException {
    }

    public void release() {
        name = null;
        action = null;
        method = null;
        onsubmit = null;
        super.release();
    }
}