Implement the resolver

1 files changed, 21 insertions, 0 deletions

diff --git a/packages/resolver/src/resolvers/fallthrough_resolver.ts b/packages/resolver/src/resolvers/fallthrough_resolver.ts
new file mode 100644
index 000000000..8f6af9be0
--- /dev/null
+++ b/packages/resolver/src/resolvers/fallthrough_resolver.ts
@@ -0,0 +1,21 @@
+import * as _ from 'lodash';
+
+import { ContractSource } from '../types';
+
+import { Resolver } from './resolver';
+
+export class FallthroughResolver extends Resolver {
+    private _resolvers: Resolver[] = [];
+    public appendResolver(resolver: Resolver): void {
+        this._resolvers.push(resolver);
+    }
+    public resolveIfExists(importPath: string): ContractSource | undefined {
+        for (const resolver of this._resolvers) {
+            const contractSourceIfExists = resolver.resolveIfExists(importPath);
+            if (!_.isUndefined(contractSourceIfExists)) {
+                return contractSourceIfExists;
+            }
+        }
+        return undefined;
+    }
+}