kelly.core.argument.CommonsFileUploadActionArgumentResolver.java Source code

Introduction

Here is the source code for kelly.core.argument.CommonsFileUploadActionArgumentResolver.java

Source

/*
 * Copyright 2002-2012 Zhuo Ying. All rights reserved.
 * Email: yingzhor@gmail.com
 *
 * 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 kelly.core.argument;

import java.io.File;
import java.util.List;

import kelly.core.action.ActionArgument;
import kelly.core.action.ActionArgumentResolver;
import kelly.core.annotation.Multipart;
import kelly.core.castor.Castor;
import kelly.core.dispatcher.WebContextHolder;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class CommonsFileUploadActionArgumentResolver implements ActionArgumentResolver {

    private static final File DEFAULT_TEMP_DIR = new File(System.getProperty("java.io.tmpdir"));

    @Override
    public boolean supports(ActionArgument actionArgument, Castor castor) {
        return actionArgument.isAnnotatedBy(Multipart.class)
                && actionArgument.getParameterType() == FileItem[].class;
    }

    @Override
    public Object resolve(ActionArgument actionArgument, Castor castor) {
        Multipart annotation = actionArgument.getAnnotation(Multipart.class);

        DiskFileItemFactory factory = new DiskFileItemFactory();
        factory.setRepository("".equals(annotation.tempdir()) ? DEFAULT_TEMP_DIR : new File(annotation.tempdir()));
        factory.setSizeThreshold(annotation.sizeThreshold());

        ServletFileUpload upload = new ServletFileUpload(factory);

        upload.setSizeMax(annotation.maxSize());

        try {
            List<FileItem> items = upload.parseRequest(WebContextHolder.getInstance().getRequest());
            return items.toArray(new FileItem[items.size()]);
        } catch (FileUploadException e) {
            throw new kelly.core.exception.FileUploadException(e);
        }
    }

}