exporttag.java

exTreme taglib的使用

/*
 * 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.extremecomponents.table.bean.Attributes;
import org.extremecomponents.table.bean.Export;

/**
 * @jsp.tag name="export" display-name="ExportTag" body-content="JSP"
 *          description="Export data to a given view. For example pdf or xls."
 * 
 * @author Jeff Johnston
 */
public class ExportTag extends TagSupport implements ExtendedAttributes {
    private String fileName;
    private String imageName;
    private String view;
    private String tooltip;

    /**
     * @jsp.attribute description="The name of the export file. Example
     *                presidents.pdf" required="true" rtexprvalue="true"
     */
    public String getFileName() {
        return TagUtils.evaluateExpressionAsString("fileName", fileName, this, pageContext);
    }

    public void setFileName(String fileName) {
        this.fileName = fileName;
    }

    /**
     * @jsp.attribute description="The image name. Example pdf" required="false"
     *                rtexprvalue="true"
     */
    public String getImageName() {
        if (StringUtils.isBlank(imageName)) {
            return getView();
        }

        return TagUtils.evaluateExpressionAsString("image", imageName, this, pageContext);
    }

    public void setImageName(String imageName) {
        this.imageName = imageName;
    }

    /**
     * @jsp.attribute description="The type of the export. Types are pdf, xls,
     *                or csv. Works with the View interface." required="false"
     *                rtexprvalue="true"
     */
    public String getView() {
        return TagUtils.evaluateExpressionAsString("view", view, this, pageContext);
    }

    public void setView(String view) {
        this.view = view;
    }

    /**
     * @jsp.attribute description="The tooltip that shows up when you mouseover
     *                the export image." required="false" rtexprvalue="true"
     */
    public String getTooltip() {
        return TagUtils.evaluateExpressionAsString("tooltip", this.tooltip, this, pageContext);
    }

    public void setTooltip(String tooltip) {
        this.tooltip = tooltip;
    }

    public int doEndTag()
            throws JspException {
        if (TagUtils.isIteratingBody(this)) {
            return EVAL_PAGE;
        }

        Export export = new Export();
        export.addAttribute(Export.FILE_NAME, getFileName());
        export.addAttribute(Export.IMAGE_NAME, getImageName());
        export.addAttribute(Export.VIEW, getView());
        export.addAttribute(Export.TOOLTIP, getTooltip());
        addExtendedAttributes(export);
        TagUtils.getModel(this).getExportHandler().addExport(export);

        return EVAL_PAGE;
    }

    public void addExtendedAttributes(Attributes attributes)
            throws JspException {
    }

    public void release() {
        fileName = null;
        imageName = null;
        view = null;
        tooltip = null;
        super.release();
    }
}