converts xml mml files to json mml files

bin/mml2json.js

@@ -0,0 +1,64 @@
+#!/usr/bin/env node
+
+var xml2js = require('xml2js'),
+    fs = require('fs'),
+    sys = require('sys');
+
+if (!process.ARGV[2]) {
+    console.log('Please specify a XML file.');
+    process.exit(1);
+}
+
+fs.readFile(process.ARGV[2], 'utf-8', function(err, data) {
+    if (err) throw err;
+
+    // Replace entities.
+    var entities = {};
+    data.match(/<!ENTITY([^>]|"([^"]|\\")*")+>/g).forEach(function(entity) {
+        var parts = entity.match(/^<!ENTITY\s+(\w+)\s+"(.+)">$/);
+        entities['&' + parts[1] + ';'] = parts[2];
+    });
+    data = data.replace(/&\w+;/g, function(entity) {
+        return entities[entity];
+    });
+
+    function addAttributes(obj) {
+        if (obj['@']) for (var key in obj['@']) obj[key] = obj['@'][key];
+        delete obj['@'];
+        return obj;
+    }
+    
+    function simplifyExternal(obj) {
+        if (obj.src) return obj.src;
+        else return obj;
+    }
+
+    var parser = new xml2js.Parser();
+    parser.addListener('end', function(json) {
+        console.log(JSON.stringify(json, function(key, value) {
+            if (!key) {
+                return addAttributes(value);
+            }
+            else if (key === 'Stylesheet') {
+                if (Array.isArray(value)) return value.map(addAttributes).map(simplifyExternal);
+                else return [ simplifyExternal(addAttributes(value)) ];
+            }
+            else if (key === 'Layer' || key === 'Stylesheet') {
+                if (Array.isArray(value)) return value.map(addAttributes);
+                else return [ addAttributes(value) ];
+            }
+            else if (key === 'Datasource') {
+                value = addAttributes(value);
+                value.Parameter.forEach(function(parameter) {
+                    value[parameter['@'].name] = parameter['#'];
+                });
+                delete value.Parameter;
+                return value;
+            }
+            else {
+                return value;
+            }
+        }, 4));
+    });
+    parser.parseString(data);
+});