org.dussan.vaadin.dcharts.helpers.ChartDataHelper.java Source code

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Here is the source code for org.dussan.vaadin.dcharts.helpers.ChartDataHelper.java

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/**
 * Copyright (C) 2012-2013  Duan Vejnovi?  <vaadin@dussan.org>
 *
 * 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.dussan.vaadin.dcharts.helpers;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.math.NumberUtils;
import org.dussan.vaadin.dcharts.events.ChartData;
import org.dussan.vaadin.dcharts.events.ChartEventType;

public class ChartDataHelper {

    private static final String ID = "id";
    private static final String EVENT_TYPE = "event";
    private static final String DATA = "data";
    private static final String EVENT_SPLITTER = "_::_";
    private static final String DATA_SPLITTER = "_:::_";

    private static boolean isNumber(String value) {
        return (value != null && NumberUtils.isNumber(value));
    }

    private static boolean isLongNumber(String value) {
        if (isNumber(value)) {
            Double number = convertToDouble(value);
            return (number == Math.floor(number));
        }
        return false;
    }

    private static Long converToLong(String value) {
        if (isNumber(value)) {
            return Long.parseLong(value);
        }
        return null;
    }

    private static Double convertToDouble(String value) {
        if (isNumber(value)) {
            return Double.parseDouble(value);
        }
        return null;
    }

    private static List<Object> convertToArray(String datas, String splitter) {
        List<String> tempData = new ArrayList<String>();
        if (datas.contains(splitter)) {
            tempData.addAll(Arrays.asList(datas.split(splitter)));
        } else {
            tempData.add(datas);
        }

        List<Object> objectData = new ArrayList<Object>();
        for (String data : tempData) {
            if (!splitter.equals(DATA_SPLITTER) && data.contains(DATA_SPLITTER)) {
                objectData.add(convertToArray(data, DATA_SPLITTER));
            } else {
                if (isNumber(data)) {
                    if (isLongNumber(data)) {
                        objectData.add(converToLong(data));
                    } else {
                        objectData.add(convertToDouble(data));
                    }
                } else {
                    objectData.add(data);
                }
            }
        }
        return objectData;
    }

    public static ChartData process(Map<String, String> chartData) {
        try {
            if (chartData.containsKey(ID) && chartData.containsKey(EVENT_TYPE) && chartData.containsKey(DATA)) {
                String chartId = chartData.get(ID);
                ChartEventType chartEventType = ChartEventType.fromString(chartData.get(EVENT_TYPE));
                Long seriesIndex = null;
                Long pointIndex = null;

                List<Object> data = convertToArray(chartData.get(DATA), EVENT_SPLITTER);
                if (data != null && data.size() > 2) {
                    seriesIndex = (Long) data.get(0);
                    data.remove(0);
                    pointIndex = (Long) data.get(0);
                    data.remove(0);
                }

                if (chartId != null && !chartId.isEmpty() && chartEventType != null) {
                    return new ChartData(chartId, chartEventType, seriesIndex, pointIndex,
                            data == null ? null : data.toArray());
                }
            }
            return null;
        } catch (Exception e) {
            return null;
        }
    }

}