ImageFileController.java

/*
 Copyright 2006 - 2010 Under Dusken

 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 no.dusken.aranea.admin.control;

import no.dusken.aranea.model.Image;
import no.dusken.aranea.util.ImageUtils;
import no.dusken.common.service.GenericService;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.util.HashMap;
import java.util.Map;

public class ImageFileController extends AbstractController {

    private GenericService<Image> imageFileService;

    private ImageUtils imageUtils;

    private String resourceDir;

    protected ModelAndView handleRequestInternal(HttpServletRequest request,
                                                 HttpServletResponse response) throws Exception {

        Map<String, Object> map = new HashMap<String, Object>();

        Long ID = ServletRequestUtils.getRequiredLongParameter(request, "ID");
        Image imageFile = imageFileService.getEntity(ID);
        if (imageFile == null) {
            // wrong or missing ID
            throw new Exception("Image file with ID " + ID + " not found.");
        }
        File file = new File(resourceDir + imageFile.getUrl());

        Integer height = ServletRequestUtils.getIntParameter(request, "height", 0);
        Integer width = ServletRequestUtils.getIntParameter(request, "width", 0);

        if (height > 0 || width > 0) {
            // we are to resize the image
            file = new File(resourceDir + imageFile.getUrl());
            file = imageUtils.resizeImage(file, width, height);
        }
        map.put("file", file);

        return new ModelAndView("fileView", map);
    }

    public void setImageFileService(GenericService<Image> imageFileService) {
        this.imageFileService = imageFileService;
    }

    public void setResourceDir(String resourceDir) {
        this.resourceDir = resourceDir;
    }

    public void setImageUtils(ImageUtils imageUtils) {
        this.imageUtils = imageUtils;
    }
}