Add utility to parse maven identifiers.

src/util/maven.ts

@@ -0,0 +1,39 @@
+import { normalize } from 'path'
+import { URL } from 'url'
+
+export class MavenUtil {
+
+    public static readonly ID_REGEX = /(.+):(.+):([^@]+)(?:@{1}(.+)$)?/
+
+    public static isMavenIdentifier(id: string) {
+        return this.ID_REGEX.test(id)
+    }
+
+    public static mavenToString(id: string, extension = 'jar') {
+        if (!this.isMavenIdentifier(id)) {
+            return null
+        }
+
+        const result = this.ID_REGEX.exec(id)
+        if (result != null) {
+            const group = result[1]
+            const artifact = result[2]
+            const version = result[3]
+            const ext = result[4] || extension
+
+            return `${group.replace(/\./g, '/')}/${artifact}/${version}/${artifact}-${version}.${ext}`
+        }
+        return null
+    }
+
+    public static mavenToUrl(id: string, extension = 'jar') {
+        const res = this.mavenToString(id, extension)
+        return res == null ? null : new URL(res)
+    }
+
+    public static mavenToPath(id: string, extension = 'jar') {
+        const res = this.mavenToString(id, extension)
+        return res == null ? null : normalize(res)
+    }
+
+}