eu.trentorise.smartcampus.parcheggiausiliari.controller.AbstractObjectController.java Source code

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/**
 *    Copyright 2014 FBK
 *
 *    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 eu.trentorise.smartcampus.parcheggiausiliari.controller;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.codehaus.jackson.map.ObjectMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.geo.Circle;

import eu.trentorise.smartcampus.parcheggiausiliari.data.GeoObjectSyncStorage;
import eu.trentorise.smartcampus.parcheggiausiliari.model.GeoObject;
import eu.trentorise.smartcampus.parcheggiausiliari.model.ObjectFilter;

public class AbstractObjectController {

    private static final String SEARCH_FILTER_PARAM = "filter";

    @Autowired
    protected GeoObjectSyncStorage storage;

    protected Log logger = LogFactory.getLog(this.getClass());

    public <T extends GeoObject> List<T> getAllObject(HttpServletRequest request, Class<T> cls) throws Exception {
        try {
            ObjectFilter filterObj = null;
            Map<String, Object> criteria = null;
            String filter = request.getParameter(SEARCH_FILTER_PARAM);
            if (filter != null) {
                filterObj = new ObjectMapper().readValue(filter, ObjectFilter.class);
                criteria = filterObj.getCriteria() != null ? filterObj.getCriteria()
                        : new HashMap<String, Object>();
            } else {
                filterObj = new ObjectFilter();
                criteria = Collections.emptyMap();
            }

            if (filterObj.getSkip() == null) {
                filterObj.setSkip(0);
            }
            if (filterObj.getLimit() == null || filterObj.getLimit() < 0) {
                filterObj.setLimit(100);
            }

            Circle circle = null;
            if (filterObj.getCenter() != null && filterObj.getRadius() != null) {
                circle = new Circle(filterObj.getCenter()[0], filterObj.getCenter()[1], filterObj.getRadius());
            }
            List<T> objects = null;

            objects = storage.searchObjects((Class<T>) cls, circle, criteria, filterObj.getLimit(),
                    filterObj.getSkip());

            if (objects != null) {
                return objects;
            }
        } catch (Exception e) {
            logger.error("failed to find objects: " + e.getMessage());
            e.printStackTrace();
        }
        return Collections.emptyList();
    }

}