From afa8e56b4edcbf920a780219ee08d341ef35d26c Mon Sep 17 00:00:00 2001
From: Takuro Wada <taxpon@gmail.com>
Date: Tue, 2 May 2017 16:11:10 +0900
Subject: [PATCH] Add validate option to swagger-codegen-cli (Issue #5466)
 (#5526)

---
 .../io/swagger/codegen/SwaggerCodegen.java    |  2 +
 .../java/io/swagger/codegen/cmd/Validate.java | 37 +++++++++++++++++++
 .../codegen/cmd/ValidateException.java        |  7 ++++
 3 files changed, 46 insertions(+)
 create mode 100644 modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/Validate.java
 create mode 100644 modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/ValidateException.java

diff --git a/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/SwaggerCodegen.java b/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/SwaggerCodegen.java
index 94b64be8d02..1b73ec6e98c 100644
--- a/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/SwaggerCodegen.java
+++ b/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/SwaggerCodegen.java
@@ -6,6 +6,7 @@ import io.swagger.codegen.cmd.ConfigHelp;
 import io.swagger.codegen.cmd.Generate;
 import io.swagger.codegen.cmd.Langs;
 import io.swagger.codegen.cmd.Meta;
+import io.swagger.codegen.cmd.Validate;
 import io.swagger.codegen.cmd.Version;
 
 /**
@@ -35,6 +36,7 @@ public class SwaggerCodegen {
                         Langs.class,
                         Help.class,
                         ConfigHelp.class,
+                        Validate.class,
                         Version.class
                 );
 
diff --git a/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/Validate.java b/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/Validate.java
new file mode 100644
index 00000000000..832e008f282
--- /dev/null
+++ b/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/Validate.java
@@ -0,0 +1,37 @@
+package io.swagger.codegen.cmd;
+
+import io.airlift.airline.Command;
+import io.airlift.airline.Option;
+
+import io.swagger.parser.SwaggerParser;
+import io.swagger.parser.util.SwaggerDeserializationResult;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+@Command(name = "validate", description = "Validate specification")
+public class Validate implements Runnable {
+
+    @Option(name = {"-i", "--input-spec"}, title = "spec file", required = true,
+            description = "location of the swagger spec, as URL or file (required)")
+    private String spec;
+
+    @Override
+    public void run() {
+        System.out.println("Validating spec file (" + spec + ")");
+
+        SwaggerParser parser = new SwaggerParser();
+        SwaggerDeserializationResult result = parser.readWithInfo(spec, null, true);
+        List<String> messageList = result.getMessages();
+        Set<String> messages = new HashSet<String>(messageList);
+
+        for (String message: messages) {
+            System.out.println(message);
+        }
+
+        if (messages.size() > 0) {
+            throw new ValidateException();
+        }
+    }
+}
\ No newline at end of file
diff --git a/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/ValidateException.java b/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/ValidateException.java
new file mode 100644
index 00000000000..f1715827ba9
--- /dev/null
+++ b/modules/swagger-codegen-cli/src/main/java/io/swagger/codegen/cmd/ValidateException.java
@@ -0,0 +1,7 @@
+package io.swagger.codegen.cmd;
+
+/**
+ * Created by takuro on 2017/05/02.
+ */
+public class ValidateException extends RuntimeException {
+}