Refactoring the service component

Here we'll refactor the getMapImage method of TemperatureImpl  implemented in previous section so that the city name can be retrieved from the passing parameters. The code is as shown below:

package com.supermap.sample.temperature;

import java.util.HashMap;

import java.util.List;

import com.supermap.services.components.Component;

import com.supermap.services.components.ComponentContext;

import com.supermap.services.components.ComponentContextAware;

import com.supermap.services.components.commontypes.*;

import com.supermap.services.components.spi.MapProvider;

@Component(providerTypes = { MapProvider.class, TemperatureProvider.class }, optional = false, type = "")

public class TemperatureImpl implements Temperature, ComponentContextAware {

    private MapProvider mapProvider = null;

    private TemperatureProvider temperatureProvider = null;

    private MapParameter defaultMapParam = null;

    public TemperatureImpl() {

    }

    @Override

    public String getTemperature(String cityName) {

        String temp = null;

        try {

            temp = temperatureProvider.GetTemperature(cityName);

        } catch (Exception e) {

            e.printStackTrace();

        }

        return temp;

    }

    @Override

    public String getMapImage(String cityName) {

        String imageUrl = null;

        if (defaultMapParam != null) {

            ImageOutputOption imageOutputOption = new ImageOutputOption();

            imageOutputOption.format = OutputFormat.JPG;

            imageOutputOption.transparent = false;

            ThemeLabel themeLabel = new ThemeLabel();

            themeLabel.memoryData = new HashMap<String, String>();

            String temp = cityName + ", " + getTemperature(cityName);

            themeLabel.memoryData.put(cityName, temp);

            themeLabel.labelExpression = "NAME";

            themeLabel.labelBackShape = LabelBackShape.ROUNDRECT;

            Style style = new Style();

            style.fillBackColor = new Color(java.awt.Color.MAGENTA.getRed(), java.awt.Color.MAGENTA.getGreen(), java.awt.Color.MAGENTA.getBlue());

            style.fillBackOpaque = true;

            style.fillForeColor = new Color(java.awt.Color.YELLOW.getRed(), java.awt.Color.YELLOW.getGreen(), java.awt.Color.YELLOW.getBlue());

            style.fillGradientMode = FillGradientMode.RADIAL;

            themeLabel.backStyle = style;

            TextStyle textStyle = new TextStyle();

            textStyle.backColor = new Color(java.awt.Color.BLUE.getRed(), java.awt.Color.BLUE.getGreen(), java.awt.Color.BLUE.getBlue());

            textStyle.fontWidth = 100000;

            textStyle.fontHeight = 100000;

            textStyle.align = TextAlignment.MIDDLECENTER;

            themeLabel.uniformStyle = textStyle;

            DatasetVectorInfo datasetVectorInfo = new DatasetVectorInfo();

            datasetVectorInfo.name = "China_Capital_pt";

            datasetVectorInfo.type = DatasetType.POINT;

            datasetVectorInfo.dataSourceName = "China";

            UGCThemeLayer themelayer = new UGCThemeLayer();

            themelayer.theme = themeLabel;

            themelayer.datasetInfo = datasetVectorInfo.copy();

            themelayer.visible = true;

            themelayer.displayFilter = "NAME = '" + cityName + "'";

            this.defaultMapParam.layers.get(0).subLayers.add(true, themelayer);

            this.defaultMapParam.scale = 0.00000003;

            Point2D center = this.getPosition(cityName);

            if (center != null) {

                this.defaultMapParam.center = new Point2D(center);

                this.defaultMapParam.rectifyType = RectifyType.BYCENTERANDMAPSCALE;

            }

            this.defaultMapParam.cacheEnabled = false;

            MapImage mapImage = mapProvider.getMapImage(this.defaultMapParam, imageOutputOption);

            imageUrl = mapImage.imageUrl;

            this.defaultMapParam.layers.get(0).subLayers.remove(themelayer.name);

        }

        return imageUrl;

    }

    private Point2D getPosition(String cityName) {

        Point2D point2D = null;

        QueryParameter queryParam = new QueryParameter();

        queryParam.name = "China_Capital_pt@China";

        QueryParameterSet queryParamSet = new QueryParameterSet();

        queryParamSet.queryParams = new QueryParameter[1];

        queryParamSet.queryParams[0] = queryParam;

        queryParamSet.expectCount = 1;

        queryParamSet.queryOption = QueryOption.ATTRIBUTEANDGEOMETRY;

        queryParam.attributeFilter = "NAME like '%" + cityName + "%'";

        QueryResult queryResult = this.mapProvider.queryBySQL(this.defaultMapParam.name, queryParamSet);

        if (queryResult != null) {

            if (queryResult.recordsets != null && queryResult.recordsets.length == 1) {

                Recordset recordset = queryResult.recordsets[0];

                // Capital is a point layer. Only one point position.

                if (recordset.features != null && recordset.features.length > 0) {

                    Geometry geometry = recordset.features[0].geometry;

                    point2D = geometry.points[0];

                }

            }

        }

        return point2D;

    }

    @Override

    public void setComponentContext(ComponentContext context) {

        TemperatureParam param = context.getConfig(TemperatureParam.class);

        if (param == null) {

            throw new IllegalArgumentException("TemperatureParam cannot be null");

        }

        List<Object> providers = context.getProviders(Object.class);

        if (providers != null) {

            for (Object provider : providers) {

                if (provider instanceof TemperatureProvider) {

                    this.temperatureProvider = (TemperatureProvider) provider;

                    break;

                }

            }

            for (Object provider : providers) {

                if (provider instanceof MapProvider) {

                    this.mapProvider = (MapProvider) provider;

                    this.defaultMapParam = this.mapProvider.getMapParameter(param.getMapName());

                    this.defaultMapParam.viewer = new Rectangle(new Point(0, 0), new Point(800, 600));

                }

            }

        }

    }

}

Note:

After compiling all the codes, copy the entire com directory (%SuperMap iServer_HOME%\samples\code\DSSE\Temperature_SPSC\bin\com) to the application directory of SuperMap iServer Web, i.e. %SuperMap iServer_HOME%webapps\iserver\WEB-INF\classes (if the classes folder does not exist yet, create it first).