Implement collectBeansFromConfigFile for JSON files

Author: NathanJPhillips

env-model-generator/src/parseJson.ts

@@ -1,5 +1,8 @@
+import * as fs from "fs-extra";
 import * as jsonConfig from "./annotationConfig";
+import { ConfigParseError } from "./configParseError";
 import * as model from "./model";
+import { lowerInitialChar } from "./utils";
 
 interface BeanWithName {
   qualifiedClassName: string;
@@ -8,7 +11,31 @@ interface BeanWithName {
 
 const beansById = new Map<string, BeanWithName>();
 
-export async function collectBeansFromConfigFile(_filePath: string): Promise<string[]> {
+export async function collectBeansFromConfigFile(filePath: string): Promise<string[]> {
+  let json: string;
+  try {
+    json = await fs.readFile(filePath, "utf8");
+  } catch (err) {
+    throw new ConfigParseError(`Can't open input file '${filePath}': ${err.message}`);
+  }
+  const annotationConfig: jsonConfig.AnnotationConfig = JSON.parse(json);
+  for (const qualifiedClassName in annotationConfig.beans) {
+    if (!annotationConfig.beans.hasOwnProperty(qualifiedClassName))
+      continue;
+    // Create bean ID
+    // TODO: Handle name parameter to @Component constructor
+    const id = lowerInitialChar(<string>qualifiedClassName.split(".").pop());
+    // Check for duplicate ids from other beans
+    if (beansById.has(id))
+      throw new ConfigParseError(`Found multiple beans with id '${id}'`);
+    const aliasedBeanId = model.Bean.getAlias(id);
+    if (aliasedBeanId !== undefined)
+      throw new ConfigParseError(`Found a bean with id same as an alias for '${aliasedBeanId}'`);
+    // Create a bean model for the bean
+    const bean = { qualifiedClassName: qualifiedClassName, bean: annotationConfig.beans[qualifiedClassName] };
+    beansById.set(id, bean);
+  }
+  // TODO: Return paths to XML config files specified in code
   return [];
 }
 

env-model-generator/src/utils.ts

@@ -3,6 +3,10 @@ import * as _ from "lodash";
 import * as pathUtils from "path";
 import * as xml2js from "xml2js";
 
+export function lowerInitialChar(value: string) {
+  return value[0].toLowerCase() + value.substr(1);
+}
+
 export function upperInitialChar(value: string) {
   return value[0].toUpperCase() + value.substr(1);
 }