org.dhara.portal.web.controllers.ExperimentController.java Source code

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Here is the source code for org.dhara.portal.web.controllers.ExperimentController.java

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/***********************************************************************************************************************
 *
 * Dhara- A Geoscience Gateway
 * ==========================================
 *
 * Copyright (C) 2013 by Dhara
 *
 ***********************************************************************************************************************
 *
 * 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.dhara.portal.web.controllers;

import org.apache.rave.model.PortalPreference;
import org.apache.rave.portal.service.PortalPreferenceService;
import org.apache.rave.portal.web.util.ModelKeys;
import org.apache.rave.portal.web.util.PortalPreferenceKeys;
import org.apache.rave.rest.model.SearchResult;
import org.dhara.portal.web.helper.ExperimentHelper;
import org.dhara.portal.web.restClientService.RestServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import static org.dhara.portal.web.controllers.GatewayControllerUtil.addNavigationMenusToModel;

/**
 * Controller class for manage experiments
 */
@Controller
public class ExperimentController {

    private static final String SELECTED_ITEM = "experiments";
    int DEFAULT_PAGE_SIZE = 10;

    @Autowired
    private RestServiceImpl restService;

    @Autowired
    private PortalPreferenceService preferenceService;

    @RequestMapping(value = { "/admin/experiments", "/admin/experiments/" }, method = RequestMethod.GET)
    public String handleRequestInternal(@RequestParam(required = false, defaultValue = "0") int offset,
            @RequestParam(required = false) final String action,
            @RequestParam(required = false) String referringPageId, Model model,
            HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        model.addAttribute(ModelKeys.REFERRING_PAGE_ID, referringPageId);
        addNavigationMenusToModel(SELECTED_ITEM, model, referringPageId);
        List<ExperimentHelper> experimentHelpers = restService.getExperiments();
        int count = experimentHelpers.size();

        experimentHelpers = getLimitedList(offset, count, experimentHelpers);
        //Set experiment data and configurations
        final SearchResult<ExperimentHelper> experiments = new SearchResult<ExperimentHelper>(experimentHelpers,
                count);
        experiments.setOffset(offset);
        experiments.setPageSize(getPageSize());
        model.addAttribute(ModelKeys.SEARCHRESULT, experiments);
        return "templates.admin.experiments";
    }

    //Reverse the list
    public ArrayList<ExperimentHelper> reverseList(List<ExperimentHelper> list) {

        if (list == null || list.isEmpty()) {
            return null;
        }

        ArrayList<ExperimentHelper> reversedlist = new ArrayList<ExperimentHelper>(list);

        Collections.reverse(reversedlist);
        return reversedlist;
    }

    //Filter out experiments to be displayed in each view
    private List<ExperimentHelper> getLimitedList(int offset, int count, List<ExperimentHelper> exp) {
        List<ExperimentHelper> limited = new ArrayList<ExperimentHelper>();

        int max = count;
        if (count > DEFAULT_PAGE_SIZE + offset)
            max = DEFAULT_PAGE_SIZE + offset;
        int j = 0;
        for (int i = offset; i < max; i++) {
            limited.add(j, exp.get(i));
            j++;
        }
        return limited;

    }

    //Get number of experiments to be displayed in view at a time
    public int getPageSize() {
        final PortalPreference pageSizePref = preferenceService.getPreference(PortalPreferenceKeys.PAGE_SIZE);
        if (pageSizePref == null) {
            return DEFAULT_PAGE_SIZE;
        }
        try {
            return Integer.parseInt(pageSizePref.getValue());
        } catch (NumberFormatException e) {
            return DEFAULT_PAGE_SIZE;
        }
    }
}