Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.Map;

public class Main {
    private static final String MAP_OPEN = "<map>";
    private static final String MAP_CLOSE = "</map>";
    private static final String MAP_EMPTY = "<map/>";
    private static final String ENTRY_OPEN = "<entry>";
    private static final String ENTRY_CLOSE = "</entry>";
    private static final String VALUE_OPEN = "<string>";
    private static final String VALUE_CLOSE = "</string>";

    @SuppressWarnings("unchecked")
    public static String toXML(Object obj) {
        Map<String, Object> map = (Map<String, Object>) obj;
        if (map == null || map.isEmpty()) {
            return MAP_EMPTY;
        }
        StringBuilder sb = new StringBuilder();
        sb.append(MAP_OPEN);
        for (Map.Entry<String, Object> entry : map.entrySet()) {
            addEntry(sb, entry.getKey(), entry.getValue() == null ? "" : entry.getValue().toString());
        }
        sb.append(MAP_CLOSE);
        return sb.toString();
    }

    private static void addEntry(StringBuilder sb, String key, String value) {
        if (key == null || value == null) {
            throw new IllegalArgumentException("key or value is null");
        }
        sb.append(ENTRY_OPEN);
        sb.append(VALUE_OPEN);
        escapeElementEntities(sb, key);
        sb.append(VALUE_CLOSE);
        sb.append(VALUE_OPEN);
        escapeElementEntities(sb, value);
        sb.append(VALUE_CLOSE);
        sb.append(ENTRY_CLOSE);
    }

    private static void escapeElementEntities(StringBuilder sb, String text) {
        for (int i = 0; i < text.length(); i++) {
            char c = text.charAt(i);
            switch (c) {
            case '<':
                sb.append("&lt;");
                break;
            case '>':
                sb.append("&gt;");
                break;
            case '&':
                sb.append("&amp;");
                break;
            default:
                sb.append(c);
            }
        }
    }
}