Samchon-xml NPM

Samchon XML

Tree-structured XML parser and generator. It's the most concise and eledic XML lilbrary.

References

Dependencies

samchon-xml is a submodule in samchon-framework and inherited from typescript-stl`

Samchon Framework: https://github.com/samchon/framework
TypeScript-STL: https://github.com/samchon/stl

API Documents

Installation

npmi install -g samchon-xml

var library = require("samchon-xml");
var xml = new library.XML();

Usage

Conception

class XML extends std.HashMap<string, XMLList>;
class XMLList extends std.Vector<XML>;

Parsing XML.

function test_xml_parsing(): void
{
	let str: string = 
    	"<invoke listener='setMemberList'>\n" +
    	"	<parameter name='application' type='string'>simulation</parameter>\n" +
        "	<parameter name='sequence' type='number'>3</parameter>\n" +
        "	<parameter type='XML'>\n" +
        "		<memberList>\n" +
        "			<member id='samchon' name='Jeongho Nam' mail='samchon@samchon.org' />\n" +
        "			<member id='github' name='GitHub' mail='github@github.com' />\n" +
        "			<member id='old_man' name='Old Kim' mail='old_man@hanmail.net' />\n" +
        "			<member id='john' name='John Doe' mail='conman@gmail.com' />\n" +
        "			<member id='robot' name='Alphago' />\n" +
        "		</memberList>\n" +
        "	</parameter>\n" +
        "</invoke>";
    
    // CREATE A NEW XML WITH THE STRING
    let xml: library.XML = new library.XML(str);
}

Accessing XML elements.

function test_xml_accessing(xml: library.XML): void
{
	/////////////////////////////////////////
    // ACCESS TO THE TAG "parameter"
    /////////////////////////////////////////
	// TEST WHETHER THE XML HAS CHILDREN XML TAGS NAMED "parameter"
    console.log( xml.has("parameter") ); // true
    let xmlList: library.XMLList = xml.get("parameter");

    // GET VALUE OF THE FIRST PARAMETER
    console.log( xmlList.at(0).getValue() ); // "simulation"
    
    // GET VALUE OF THE SECOND PARAMETER
    // NOTE, ALL THE VALUE AND PROPERTIES IN XML ARE 'STRING' TYPE
    console.log( parseInt(xmlList.at(1).getValue()) ); // 3
    
    // GET PROPERTY 'name' IN 2ND PARAMETER
    console.log( xmlList.at(1).getProperty("name") ); // "sequence"
    
    // TEST WHETHER 3RD PARAMETER HAS PROPERTY NAME
    console.log( xmlList.at(2).hasProperty("name") ); // false
    
    /////////////////////////////////////////
    // ACCESS TO THE TAG "member" in "memberList"
    /////////////////////////////////////////
    // TEST WHETHER "memberList" AND "member" TAGS ARE
    console.log( xml.has("memberList") ); // true
    console.log( xml.has("memberList").at(0).has("member") ); // true
    
    // IT'S IMPORTANT. ALTHOUGH ONLY A TAG NAMED "memberList" EXISTS,
    // THE TAG ('XML') IS ALSO CAPSULED IN THE 'XMLList'
    let members: library.XMLList = xml.get("memberList").at(0).get("member");
    
    // ACCESSING TO THE [old_man]'s mail
    console.log( members.at(2).getProperty("mail") ); // "old_man@hanmail.net"
    console.log( xml.get("memberList").at(0).get("member").at(2).getProperty("mail") ); // FROM TOP LEVEL'S XML
    
     // NORMAL ITERATION
    for (let i: number = 0; i < members.size(); i++)
    	if (xmlList.get(i).getProperty("id") == "old_man")
        	console.log( members.at(i).getProperty("mail") );
    
    // ITERATION USING functions in <algorithm> of STL
    let it: std.VectorIterator<XML> = 
    	std.find_if
        (
        	members.begin(), members.end(),
    		function (myXML: library.XML): boolean
        	{
        		return myXML.hasProperty("id") && myXML.getProperty("id") == "old_man";
			}
        );
    if (it.equal_to(members.end()) == false)
    	console.log( it.value.getProperty("mail") ); // "old_man@hanmail.net"
}

Generating XML structure.

We will generate a XML structure like below:

document.xml

<document>
	<id>F204-3312-3A2D</id>
    <name>schedule</name>
    <shapeList>
    	<shape type="circle" radius="5">
        	<point x="4" y="5" />
        </shape>
        <shape type="polyline">
        	<point x="10" y="12" />
            <point x="14" y="27" />
            <point x="19" y="24" />
        </shape>
        <shape type="polygon">
        	<outer type="polyline">
                <point x="2" y="-14" />
                <point x="4" y="5" />
                <point x="-3" y="0" />
                <point x="9" y="6" />
                <point x="7" y="4" />
            </outer>
            <inner>
            	<shape type="polyline">
                	<point x="1.2" y="1.5" />
                    <point x="1.5" y="1.7" />
                    <point x="1.1" y="0.9" />
				</shape>
				<shape type="polyline">
                	<point x="1.1" y="1.1" />
                    <point x="1.2" y="0.9" />
                    <point x="1.3" y="1.2" />
                </shape>
            </inner>
        </shape>
    </shapeList>
</document>

We can generate the XML structure by manually following step by step.

function test_xml_generation(): void
{
	////////////
	// CONSTRUCT TOP LEVEL XML ELEMENT
    ////////////
	let xml: library.XML = new library.XML();
    xml.setTag("document");
    xml.insertValue("id", "F204-3312-3A2D");
    xml.insertValue("name", "schedule");
    
    // CREATE SHAPE_LIST TEMPORAILY
    let shapeList: library.XML = new library.XML();
    shapeList.setTag("shapeList");
    
    // INSERT SHAPE_LIST TO THE TOP LEVEL'S
    xml.push(shapeList);

	////////////
    // CONSTRUCT SHAPE ELEMENTS
    ////////////
    // CONSTRUCT CIRCLE
    let circle: library.XML = new library.XML();
    circle.setTag("shape");
    circle.setProperty("type", "circle");
    circle.setProperty("raidus", 5);
    
    let circle_point: library.XML = new library.XML();
    circle_point.setTag("point");
    circle_point.setProperty("x", 4);
    circle_point.setProperty("y", 5);
    
    circle.push(circle_point); // INSERT TO CIRCLE
    shapeList.push(circle); // INSERT TO SHAPE_LIST

	// CONSTRUCT POLYLINE
    let polyline: library.XML = new library.XML();
    polyline.setTag("shape");
	polyline.setProperty("type", "polyline");
    
    let polyline_p1: library.XML; // ...
    let polyline_p2: library.XML; // ...
    let polyline_p3: library.XML; // ...
    
    polyline.push(polyline_p1, polyline_p2, polyline_p3); // INSERT POINTS INTO POLY_LINE
    shapeList.push(polyline); // INSERT POLYLINE INTO THE SHAPE_LIST

    /* REPEAT THOSE SCRIPTS TO POLYGON ...
    --------------------------------------------------------------------------
    	AS YOU CAN SEE, TYPING ALL FEATURES IS VERY TIRESOME.
        YOU CAN OMIT MOST OF THOSE PROCESSES BY USING ENTITY MODULE.
        LOOK BELOW, I INTRODUCE THE ENTITY MODULE IN SAMCHON-FRAMEWORK.
    --------------------------------------------------------------------------
    */

	console.log(xml.toString()); // UPPER document.xml WILL BE PRINTED OUT
}

Using Entity Module

You can utilize entity module of samchon-framework, then it will be much easier.

Samchon Framework: https://github.com/samchon/framework

First, install samchon-framework and load it.

npm install -g samchon-framework

var samchon = require("samchon-framework");

var library = samchon.library;
var protocol = samchon.protocol;

Implements

Just read and types following the codes, then you can understand how to utilize the entity module.

interface IShape extends protocol.IEntity 
{
	TYPE(): string;
}

class ShapeList extends protocol.EntityArray<IShape>
{
	public createChild(xml: library.XML): IShape
    {
    	let type: string = xml.getProperty("type");
        
        if (type == "circle")
        	return new Circle();
        else if (type == "polyline")
        	return new Polyline();
        else if (type == "polygon")
        	return new Polygon();
        else
        	return null;
	}
    
    public TAG(): string
    {
    	return "shapeList";
	}
    public CHILD_TAG(): string
    {
    	return "shape";
	}
}

class Point extends protocol.Entity
{
	private x: number;
    private y: number;
    
    public constructor();
    public constructor(x: number, y: number);
    
    public constructor(x: number = 0, y: number = 0)
    {
    	super();
    
    	// MEMBER VARIABLES MUST BE INITIALIZED
    	this.x = x;
        this.y = y;
	}
    
    public TAG(): string
    {
    	// IT'S ALL. 
        // YOU DON'T NEED TO SPECIFY PARSING OR GENERATING COMMAND FOR ATOMIC-VARIABLES.
    	return "point";
	}
}

class Circle extends protocol.Entity implements IShape
{
	private radius: number;
    private center: Point;
    
    public constructor();
    public constructor(radius: number, center: Point);
    
    public constructor(radius: number = 0, center: Point = new Point(0, 0))
    {
    	super();
        
        this.radius = radius;
        this.center = center;
    }
    
    public construct(xml: library.XML): void
    {
    	// ATOMIC VARIABLE raidus IS CONSTRUCTED AUTOMATICALLY
    	super.construct(xml);
        
        // BUT CHILD ENTITY OBJECT IS NOT. IT MUST BE SPECIFIED
        this.center.construct( xml.get(this.center.TAG()).at(0) );
    }
    
    public toXML(): library.XML
    {
    	// ATOMIC VARIABLE raidus IS CONVERTED AUTOMATICCALLY
        let xml: library.XML = super.toXML();
        
        // SPECIFY THE TYPE "CIRCLE"
       	xml.setProperty("type", this.TYPE());
        
        // BUT CHILD ENTITY OBJECT IS NOT. IT MUST BE SPECIFIED
        xml.push(this.center.toXML());
        
        return xml;
	}
}

class Polyline extends protocol.EntityArray<Point> implements IShape
{
	public createChild(xml: library.XML): Point
    {
    	return new Point();
	}

	public TAG(): string
    {
    	return "shape";
    }
    public CHILD_TAG(): string
    {
    	return "point";
	}
    
    public TYPE(): string
    {
    	return "polyline";
	}
    
    public toXML(): library.XML
    {
    	let xml: library.XML = super.toXML();
        xml.setProperty("type", this.TYPE());
        
        return xml;
	}
}

class InnerPolylines extends protocol.EntityArray<Polyline>
{
	public createChild(xml: library.XML): Polyline
    {
    	return new PolyLine();
	}
    
    public TAG(): string
    {
    	return "inner";
	}
    public CHILD_TAG(): string
    {
    	return "shape";
	}
}

class Polygon extends protocol.Entity implements IShape
{
    private outer: PolyLine;
    private inner: InnerPolyLines;

	public constructor();
    public constructor(outer: Polyline, inner: InnerPolylines);
    
    public constructor(outer: Polyline = new Polyline(), inner: InnerPolylines = new InnerPolylines())
    {
    	super();
    
    	// MUST BE INITAILIZED
    	this.outer = outer;
        this.inner = inner;
	}

	public construct(xml: library.XML): void
    {
    	this.outer.construct(xml.get("outer").at(0));
        
        // IF TAG "inner" DOESN'T EXIST, CLEAR ORDINARY
        if (xml.has("inner"))
        	this.inner.construct(xml.get("inner").at(0));
        else
        	this.inner.clear();
	}

    public TAG(): string
    {
    	return "shape";
    }
    public TYPE(): string
    {
    	return "polyline";
	}
    
    public toXML(): library.XML
    {
    	let xml: library.XML = super.toXML();
        xml.setProperty("type", this.TYPE());
        
        // CHANGE OUTER'S TAG; "shape" -> "outer"
        let outer_xml: library.XML = this.outer.toXML();
        outer_xml.setTag("outer");
        
        xml.push(outer_xml);
        
        // PUSH INNER IF NOT EMPTY
        if (this.inner.empty() == false)
        	xml.push(this.inner.toXML());
        
        return xml;
	}
}

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