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Java example source code file (Component.ts)

This example Java source code file (Component.ts) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

charthistogram, chartscatter, chartstackedarea, component, componentdiv, componenttable, componenttext, componenttype, error, json, renderable, typical, unknown

The Component.ts Java example source code

/*
 *
 *  * Copyright 2016 Skymind,Inc.
 *  *
 *  *    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.
 *
 */
/// <reference path="../typedefs/jquery.d.ts" />
/// <reference path="Style.ts" />
/// <reference path="ComponentType.ts" />


abstract class Component {

    private componentType: ComponentType;

    constructor(componentType: ComponentType){
        this.componentType = componentType;
    }

    public getComponentType(){
        return this.componentType;
    }

    /* Parse the JSON string that represents a component, and build that component
     * Assumption here: the format is like '{"ComponentTable": {...}}' - i.e., as generated by Jackson for the Java objects
     *  */
    public static getComponent(jsonStr: string): Renderable {

        var json: any = JSON.parse(jsonStr);
        var key: string;
        if(json["componentType"]) key = json["componentType"];  //No wrapper object case...
        else key = Object.keys(json)[0];    //Typical wrapper object case



        switch(key){
            case ComponentType[ComponentType.ComponentText]:
                return new ComponentText(jsonStr);

            case ComponentType[ComponentType.ComponentTable]:
                return new ComponentTable(jsonStr);

            case ComponentType[ComponentType.ChartHistogram]:
                return new ChartHistogram(jsonStr);

            case ComponentType[ComponentType.ChartHorizontalBar]:
                throw new Error("Horizontal bar chart: not yet implemented");

            case ComponentType[ComponentType.ChartLine]:
                return new ChartLine(jsonStr);

            case ComponentType[ComponentType.ChartScatter]:
                return new ChartScatter(jsonStr);

            case ComponentType[ComponentType.ChartStackedArea]:
                return new ChartStackedArea(jsonStr);

            case ComponentType[ComponentType.DecoratorAccordion]:
                return new DecoratorAccordion(jsonStr);

            case ComponentType[ComponentType.ComponentDiv]:
                return new ComponentDiv(jsonStr);

            default:
                throw new Error("Unknown component type \"" + key + "\" or invalid JSON: \"" + jsonStr + "\"");
        }
    }
}






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