exporthandler.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.handler;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.extremecomponents.table.bean.Export;
import org.extremecomponents.table.core.BaseModel;
import org.extremecomponents.table.core.TableConstants;

/**
 * @author Jeff Johnston
 */
public class ExportHandler {
    public final static String PDF = "pdf";
    public final static String XLS = "xls";
    public final static String TXT = "txt";
    public final static String CSV = "csv";
    public final static String EXPORT_NAME = "en_";
    public final static String EXPORT_DATA = "exportData";
    private BaseModel model;
    private List exports = new ArrayList();

    private Boolean invokeExport;

    public ExportHandler(BaseModel model) {
        this.model = model;
    }

    public void addExport(Export export) {
        exports.add(export);
    }

    public Export getExport(String view) {
        for (Iterator iter = exports.iterator(); iter.hasNext();) {
            Export export = (Export) iter.next();

            if (export.getView().equals(view)) {
                return export;
            }
        }

        return null;
    }

    public boolean invokeExport() {
        if (invokeExport != null) {
            return invokeExport.booleanValue();
        }

        String value = model.getRegistry().getParameter(TableConstants.EXPORT);
        invokeExport = new Boolean(StringUtils.isNotBlank(value));

        return invokeExport.booleanValue();
    }

    public Export getCurrentExport() {
        return getExport(model.getRegistry().getParameter(TableConstants.EXPORT));
    }

    public List getExports() {
        return exports;
    }

    public boolean showExports() {
        if (!model.getTableHandler().getTable().showExports()) {
            return false;
        }

        return getExports().size() > 0;
    }

    public void destroy() {
        exports.clear();
        exports = null;
    }
}