com.tcdng.unify.web.ui.controller.FileAttachmentResourceController Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2018-2023 The Code Department.
 * 
 * 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 com.tcdng.unify.web.ui.controller;

import java.io.OutputStream;

import com.tcdng.unify.core.UnifyException;
import com.tcdng.unify.core.annotation.Component;
import com.tcdng.unify.core.util.IOUtils;
import com.tcdng.unify.web.constant.Secured;
import com.tcdng.unify.web.ui.AbstractPageResourceController;
import com.tcdng.unify.web.ui.widget.control.FileAttachmentHandler;
import com.tcdng.unify.web.ui.widget.data.FileAttachmentInfo;
import com.tcdng.unify.web.ui.widget.data.FileAttachmentsInfo;

/**
 * Resource controller for file attachment.
 * 
 * @author The Code Department
 * @since 1.0
 */
@Component("/resource/fileattachment")
public class FileAttachmentResourceController extends AbstractPageResourceController {

    public FileAttachmentResourceController() {
        super(Secured.FALSE);
    }

    @Override
    public void prepareExecution() throws UnifyException {
        setContentDisposition(getResourceName());
    }

    @Override
    public void execute(OutputStream outputStream) throws UnifyException {
        byte[] data = null;
        Object resource = removeSessionAttribute(getResourceName());
        if (resource instanceof FileAttachmentsInfo) {
            FileAttachmentsInfo fileAttachmentsInfo = (FileAttachmentsInfo) resource;
            FileAttachmentInfo fileAttachmentInfo = fileAttachmentsInfo.getSelectedAttachmentInfo();
            data = fileAttachmentInfo.getAttachment();
            if (data == null) {
                String handler = fileAttachmentsInfo.getHandlerName();
                if (handler != null) {
                    FileAttachmentHandler fileAttachmentHandler = (FileAttachmentHandler) getComponent(handler);
                    FileAttachmentInfo viewFileAttachmentInfo = fileAttachmentHandler
                            .handleView(fileAttachmentsInfo.getParentId(), fileAttachmentInfo);
                    data = viewFileAttachmentInfo.getAttachment();
                }
            }
        } else {
            data = ((FileAttachmentInfo) resource).getAttachment();
        }

        IOUtils.writeAll(outputStream, data);
    }

}