com.github.tsijercic1.XMLParser Maven / Gradle / Ivy

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XML Parser for students
There is a newer version: 1.3
package com.github.tsijercic1;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import java.util.TreeMap;


public class XMLParser {

    BufferedReader reader = null;
    public XMLParser(String filepath){
        try {
            reader = new BufferedReader(new FileReader(filepath));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
    public Node parse(){
        String document = "";
        int t=0;
        while(true){
            try {
                if (!((t=reader.read())!=-1)) break;
            } catch (IOException e) {
                e.printStackTrace();
            }
            document += ""+(char)t;
        }
        document=excludeTags(document,"");
        document=excludeTags(document,"");
        document = document.trim();
        String[] lines = document.split("\n");
        document = "";
        for(int i=0; i< lines.length;i++){
            if(!lines[i].isEmpty())
                document = document.concat(lines[i]+"\n");
        }
        Node node = createStructure(document);
        String test = "0123456789";
        try {
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return node;
    }
    private boolean isOpenningTag(String tag){
        return tag.matches("<[a-zA-Z].*");
    }
    private boolean isContentTag(String tag){
        return tag.matches("<_Content>.*");
    }
    private boolean isClosingTag(String tag){
        return tag.matches("");
    }

    private Map getAttributesFromTag(String s, int afterLastCharacterIndex) {
        Map map = new TreeMap<>();
        ArrayList attributes = new ArrayList<>();
        int numberOfQuotes = 0;
        int startOfAttribute = afterLastCharacterIndex;
        for(int i=afterLastCharacterIndex;i tags = null;
        Node node = null;
        try {
            tags = parseDocumentIntoArrayList(document);
            TagTree tagTree = new TagTree(tags);
            Tag root = tagTree.getRoot();
            node = new Node();
            node.setName(root.getName());
            Map attributes = getAttributesFromTag(root.getTag(), 1+node.getName().length());
            attributes.forEach(node::addAttribute);
            ArrayList nodes = getChildNodes(root); //parseNode(tags,0).nodes;
            if(nodes!=null){
                for(Node element:nodes){
                    node.addChildNode(element);
                }
            }
        } catch (InvalidXMLException e) {
            e.printStackTrace();
        }
        return node;
    }

    private ArrayList getChildNodes(Tag root) {
        ArrayList nodes = new ArrayList<>();
        for(Tag element : root.getChildren()){
            if(isContentTag(element.getTag())){
                Node node = new Node();
                node.setContent(element.getTag().replace("<_Content>","").replace("",""));
                node.setName("");
                nodes.add(node);
            }else{
                Node node = new Node(element.getName());
                Map attributes = getAttributesFromTag(element.getTag(), 1 + node.getName().length());
                attributes.forEach(node::addAttribute);
                ArrayList children = getChildNodes(element);
                children.forEach(node::addChildNode);
                nodes.add(node);
            }
        }

        return nodes;
    }

    private String excludeTags(String document, String leftBorder, String rightBorder) {
        String result = "";
        int start=0;
        int end=0;
        end = document.indexOf(leftBorder);
        if(end == -1)return document;
        for(;;){
            end = document.indexOf(leftBorder,start);
            if(end==-1)break;
            for(int i=start;i parseDocumentIntoArrayList(String document) throws InvalidXMLException {
        ArrayList dom = new ArrayList<>();
        boolean isInQoutation = false;
        boolean isInTag = false;
        boolean mustTakeChar = false;
        boolean isContent = false;
        String temp = "";
        for (int i = 0; i < document.length(); i++)
        {
            char element = document.charAt(i);
            if (element == '<')
            {
                if (isContent)
                {
                    temp = temp.trim();
                    dom.add("<_Content>"+temp+"");
                    temp = "";
                    isContent = false;
                }
                if (isInTag && !isInQoutation)
                    throw new InvalidXMLException("Invalid XML => \"<\" after \"<\"");
                isInTag = true;
                temp = temp + element;
            }
            else if (element == '>' && !isInQoutation)
            {
                if (!isInTag)
                    throw new InvalidXMLException("Invalid XML => loose \">\" at: "+document.substring(i));
                isInTag = false;
                temp = temp + element;
                temp = temp.trim();
                dom.add(temp);
                temp = "";
            }
            else if (element == '\"')
            {
                isInQoutation = !isInQoutation;
                temp += element;
            }
            else
            {
                if (isInTag)
                {
                    if (element == '\n')
                    {
                        temp += " ";
                    }
                    else
                    {
                        temp += element;
                    }
                }
                else if (isContent)
                {
                    temp += element;
                }
                else if (element != ' ' && element != '\n' && element != '\r' && element != '\t')
                {
                    isContent = true;
                    temp += element;
                }
            }
        }
        if (isInQoutation)
            throw new InvalidXMLException("Invalid XML Qoutation");
        return dom;
    }


}