diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTest.tokens b/runtime/Swift/Tests/Antlr4Tests/SwiftTest.tokens
deleted file mode 100644
index e91685d6e..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTest.tokens
+++ /dev/null
@@ -1,2 +0,0 @@
-T__0=1
-'A'=1
diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTestBaseListener.swift b/runtime/Swift/Tests/Antlr4Tests/SwiftTestBaseListener.swift
deleted file mode 100644
index 35d518c6a..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTestBaseListener.swift
+++ /dev/null
@@ -1,50 +0,0 @@
-// Generated from SwiftTest.g4 by ANTLR 4.6
-
-import Antlr4
-
-
-/**
- * This class provides an empty implementation of {@link SwiftTestListener},
- * which can be extended to create a listener which only needs to handle a subset
- * of the available methods.
- */
-open class SwiftTestBaseListener: SwiftTestListener {
-    public init() { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	open func enterS(_ ctx: SwiftTestParser.SContext) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	open func exitS(_ ctx: SwiftTestParser.SContext) { }
-
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	open func enterEveryRule(_ ctx: ParserRuleContext) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	open func exitEveryRule(_ ctx: ParserRuleContext) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	open func visitTerminal(_ node: TerminalNode) { }
-	/**
-	 * {@inheritDoc}
-	 *
-	 * <p>The default implementation does nothing.</p>
-	 */
-	open func visitErrorNode(_ node: ErrorNode) { }
-}
\ No newline at end of file
diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexer.swift b/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexer.swift
deleted file mode 100644
index d722fc187..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexer.swift
+++ /dev/null
@@ -1,90 +0,0 @@
-// Generated from SwiftTest.g4 by ANTLR 4.6
-import Antlr4
-
-open class SwiftTestLexer: Lexer {
-	internal static var _decisionToDFA: [DFA] = {
-          var decisionToDFA = [DFA]()
-          let length = SwiftTestLexer._ATN.getNumberOfDecisions()
-          for i in 0..<length {
-          	    decisionToDFA.append(DFA(SwiftTestLexer._ATN.getDecisionState(i)!, i))
-          }
-           return decisionToDFA
-     }()
-
-	internal static let _sharedContextCache:PredictionContextCache = PredictionContextCache()
-	public static let T__0=1
-	public static let channelNames: [String] = [
-		"DEFAULT_TOKEN_CHANNEL", "HIDDEN"
-	]
-
-	public static let modeNames: [String] = [
-		"DEFAULT_MODE"
-	]
-
-	public static let ruleNames: [String] = [
-		"T__0"
-	]
-
-	private static let _LITERAL_NAMES: [String?] = [
-		nil, "'A'"
-	]
-	private static let _SYMBOLIC_NAMES: [String?] = [
-	]
-	public static let VOCABULARY: Vocabulary = Vocabulary(_LITERAL_NAMES, _SYMBOLIC_NAMES)
-
-	/**
-	 * @deprecated Use {@link #VOCABULARY} instead.
-	 */
-	//@Deprecated
-	public let tokenNames: [String?]? = {
-	    let length = _SYMBOLIC_NAMES.count
-	    var tokenNames = [String?](repeating: nil, count: length)
-		for i in 0..<length {
-			var name = VOCABULARY.getLiteralName(i)
-			if name == nil {
-				name = VOCABULARY.getSymbolicName(i)
-			}
-			if name == nil {
-				name = "<INVALID>"
-			}
-			tokenNames[i] = name
-		}
-		return tokenNames
-	}()
-
-	override
-	open func getTokenNames() -> [String?]? {
-		return tokenNames
-	}
-
-    open override func getVocabulary() -> Vocabulary {
-        return SwiftTestLexer.VOCABULARY
-    }
-
-	public override init(_ input: CharStream) {
-	    RuntimeMetaData.checkVersion("4.7", RuntimeMetaData.VERSION)
-		super.init(input)
-		_interp = LexerATNSimulator(self, SwiftTestLexer._ATN, SwiftTestLexer._decisionToDFA, SwiftTestLexer._sharedContextCache)
-	}
-
-	override
-	open func getGrammarFileName() -> String { return "SwiftTest.g4" }
-
-    override
-	open func getRuleNames() -> [String] { return SwiftTestLexer.ruleNames }
-
-	override
-	open func getSerializedATN() -> String { return SwiftTestLexer._serializedATN }
-
-	override
-	open func getChannelNames() -> [String] { return HelloLexer.channelNames }
-
-	override
-	open func getModeNames() -> [String] { return SwiftTestLexer.modeNames }
-
-	override
-	open func getATN() -> ATN { return SwiftTestLexer._ATN }
-
-    public static let _serializedATN: String = SwiftTestLexerATN().jsonString
-	public static let _ATN: ATN = ATNDeserializer().deserializeFromJson(_serializedATN)
-}
diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexer.tokens b/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexer.tokens
deleted file mode 100644
index e91685d6e..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexer.tokens
+++ /dev/null
@@ -1,2 +0,0 @@
-T__0=1
-'A'=1
diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexerATN.swift b/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexerATN.swift
deleted file mode 100644
index 978753511..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTestLexerATN.swift
+++ /dev/null
@@ -1,3 +0,0 @@
-class SwiftTestLexerATN {
-    let jsonString: String = "{\"version\":3,\"uuid\":\"aadb8d7e-aeef-4415-ad2b-8204d6cf042e\",\"grammarType\":0,\"maxTokenType\":1,\"states\":[{\"stateType\":6,\"ruleIndex\":-1},{\"stateType\":2,\"ruleIndex\":0},{\"stateType\":7,\"ruleIndex\":0},{\"stateType\":1,\"ruleIndex\":0},{\"stateType\":1,\"ruleIndex\":0}],\"nonGreedyStates\":[],\"precedenceStates\":[],\"ruleToStartState\":[{\"stateNumber\":1,\"ruleToTokenType\":1}],\"modeToStartState\":[0],\"nsets\":0,\"IntervalSet\":[],\"allTransitionsBuilder\":[[{\"src\":0,\"trg\":1,\"edgeType\":1,\"arg1\":0,\"arg2\":0,\"arg3\":0}],[{\"src\":1,\"trg\":3,\"edgeType\":1,\"arg1\":0,\"arg2\":0,\"arg3\":0}],[{\"src\":3,\"trg\":4,\"edgeType\":5,\"arg1\":65,\"arg2\":0,\"arg3\":0}],[{\"src\":4,\"trg\":2,\"edgeType\":1,\"arg1\":0,\"arg2\":0,\"arg3\":0}]],\"decisionToState\":[0],\"lexerActions\":[]}"
-}
\ No newline at end of file
diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTestListener.swift b/runtime/Swift/Tests/Antlr4Tests/SwiftTestListener.swift
deleted file mode 100644
index fbcbc17bf..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTestListener.swift
+++ /dev/null
@@ -1,21 +0,0 @@
-// Generated from SwiftTest.g4 by ANTLR 4.6
-import Antlr4
-
-/**
- * This interface defines a complete listener for a parse tree produced by
- * {@link SwiftTestParser}.
- */
-public protocol SwiftTestListener: ParseTreeListener {
-	/**
-	 * Enter a parse tree produced by {@link SwiftTestParser#s}.
-	 - Parameters:
-	   - ctx: the parse tree
-	 */
-	func enterS(_ ctx: SwiftTestParser.SContext)
-	/**
-	 * Exit a parse tree produced by {@link SwiftTestParser#s}.
-	 - Parameters:
-	   - ctx: the parse tree
-	 */
-	func exitS(_ ctx: SwiftTestParser.SContext)
-}
\ No newline at end of file
diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTestParser.swift b/runtime/Swift/Tests/Antlr4Tests/SwiftTestParser.swift
deleted file mode 100644
index e1ef5ee9c..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTestParser.swift
+++ /dev/null
@@ -1,118 +0,0 @@
-// Generated from SwiftTest.g4 by ANTLR 4.6
-import Antlr4
-
-open class SwiftTestParser: Parser {
-
-	internal static var _decisionToDFA: [DFA] = {
-          var decisionToDFA = [DFA]()
-          let length = SwiftTestParser._ATN.getNumberOfDecisions()
-          for i in 0..<length {
-            decisionToDFA.append(DFA(SwiftTestParser._ATN.getDecisionState(i)!, i))
-           }
-           return decisionToDFA
-     }()
-	internal static let _sharedContextCache: PredictionContextCache = PredictionContextCache()
-	public enum Tokens: Int {
-		case EOF = -1, T__0 = 1
-	}
-	public static let RULE_s = 0
-	public static let ruleNames: [String] = [
-		"s"
-	]
-
-	private static let _LITERAL_NAMES: [String?] = [
-		nil, "'A'"
-	]
-	private static let _SYMBOLIC_NAMES: [String?] = [
-	]
-	public static let VOCABULARY: Vocabulary = Vocabulary(_LITERAL_NAMES, _SYMBOLIC_NAMES)
-
-	/**
-	 * @deprecated Use {@link #VOCABULARY} instead.
-	 */
-	//@Deprecated
-	public let tokenNames: [String?]? = {
-	    let length = _SYMBOLIC_NAMES.count
-	    var tokenNames = [String?](repeating: nil, count: length)
-		for i in 0..<length {
-			var name = VOCABULARY.getLiteralName(i)
-			if name == nil {
-				name = VOCABULARY.getSymbolicName(i)
-			}
-			if name == nil {
-				name = "<INVALID>"
-			}
-			tokenNames[i] = name
-		}
-		return tokenNames
-	}()
-
-	override
-	open func getTokenNames() -> [String?]? {
-		return tokenNames
-	}
-
-	override
-	open func getGrammarFileName() -> String { return "SwiftTest.g4" }
-
-	override
-	open func getRuleNames() -> [String] { return SwiftTestParser.ruleNames }
-
-	override
-	open func getSerializedATN() -> String { return SwiftTestParser._serializedATN }
-
-	override
-	open func getATN() -> ATN { return SwiftTestParser._ATN }
-
-	open override func getVocabulary() -> Vocabulary {
-	    return SwiftTestParser.VOCABULARY
-	}
-
-	public override init(_ input:TokenStream)throws {
-	    RuntimeMetaData.checkVersion("4.6", RuntimeMetaData.VERSION)
-		try super.init(input)
-		_interp = ParserATNSimulator(self,SwiftTestParser._ATN,SwiftTestParser._decisionToDFA, SwiftTestParser._sharedContextCache)
-	}
-	open class SContext:ParserRuleContext {
-		open func EOF() -> TerminalNode? { return getToken(SwiftTestParser.Tokens.EOF.rawValue, 0) }
-		open override func getRuleIndex() -> Int { return SwiftTestParser.RULE_s }
-		override
-		open func enterRule(_ listener: ParseTreeListener) {
-			if listener is SwiftTestListener {
-			 	(listener as! SwiftTestListener).enterS(self)
-			}
-		}
-		override
-		open func exitRule(_ listener: ParseTreeListener) {
-			if listener is SwiftTestListener {
-			 	(listener as! SwiftTestListener).exitS(self)
-			}
-		}
-	}
-	@discardableResult
-	open func s() throws -> SContext {
-		var _localctx: SContext = SContext(_ctx, getState())
-		try enterRule(_localctx, 0, SwiftTestParser.RULE_s)
-		defer {
-	    		try! exitRule()
-	    }
-		do {
-		 	try enterOuterAlt(_localctx, 1)
-		 	setState(2)
-		 	try match(SwiftTestParser.Tokens.T__0.rawValue)
-		 	setState(3)
-		 	try match(SwiftTestParser.Tokens.EOF.rawValue)
-
-		}
-		catch ANTLRException.recognition(let re) {
-			_localctx.exception = re
-			_errHandler.reportError(self, re)
-			try _errHandler.recover(self, re)
-		}
-
-		return _localctx
-	}
-
-   public static let _serializedATN : String = SwiftTestParserATN().jsonString
-   public static let _ATN: ATN = ATNDeserializer().deserializeFromJson(_serializedATN)
-}
\ No newline at end of file
diff --git a/runtime/Swift/Tests/Antlr4Tests/SwiftTestParserATN.swift b/runtime/Swift/Tests/Antlr4Tests/SwiftTestParserATN.swift
deleted file mode 100644
index 0cb68b385..000000000
--- a/runtime/Swift/Tests/Antlr4Tests/SwiftTestParserATN.swift
+++ /dev/null
@@ -1,3 +0,0 @@
-class SwiftTestParserATN {
-    let jsonString: String = "{\"version\":3,\"uuid\":\"aadb8d7e-aeef-4415-ad2b-8204d6cf042e\",\"grammarType\":1,\"maxTokenType\":1,\"states\":[{\"stateType\":2,\"ruleIndex\":0},{\"stateType\":7,\"ruleIndex\":0},{\"stateType\":1,\"ruleIndex\":0},{\"stateType\":1,\"ruleIndex\":0},{\"stateType\":1,\"ruleIndex\":0},{\"stateType\":1,\"ruleIndex\":0}],\"nonGreedyStates\":[],\"precedenceStates\":[],\"ruleToStartState\":[{\"stateNumber\":0}],\"modeToStartState\":[],\"nsets\":0,\"IntervalSet\":[],\"allTransitionsBuilder\":[[{\"src\":0,\"trg\":2,\"edgeType\":1,\"arg1\":0,\"arg2\":0,\"arg3\":0}],[{\"src\":2,\"trg\":3,\"edgeType\":5,\"arg1\":1,\"arg2\":0,\"arg3\":0}],[{\"src\":3,\"trg\":4,\"edgeType\":5,\"arg1\":0,\"arg2\":0,\"arg3\":1}],[{\"src\":4,\"trg\":1,\"edgeType\":1,\"arg1\":0,\"arg2\":0,\"arg3\":0}],[]],\"decisionToState\":[],\"lexerActions\":[]}"
-}
\ No newline at end of file
diff --git a/runtime/Swift/test.py b/runtime/Swift/test.py
new file mode 100755
index 000000000..19e6f0be1
--- /dev/null
+++ b/runtime/Swift/test.py
@@ -0,0 +1,66 @@
+#! /usr/bin/python
+
+"""
+Find all .g4 files and generate parsers in the same directory.
+the antlr used should be the one located at user's mvn directory
+the filename is antlr4-ANTLR_VERSION-SNAPSHOT.jar. You can get it
+by running: "mvn install"
+
+NOTE: In case of customized location of .m2 folder, you can change the
+USER_M2 constant below.
+
+the java version is used according to environment variable $JAVA_HOME.
+"""
+
+import fnmatch
+import os.path
+from subprocess import call
+
+ANTLR_VERSION = '4.7'
+USER_M2 = os.path.expanduser('~') + '/.m2/'
+ANTLR4_FOLDER = USER_M2 + 'repository/org/antlr/antlr4/' + ANTLR_VERSION + '-SNAPSHOT/'
+ANTLR4_JAR = ANTLR4_FOLDER + 'antlr4-' + ANTLR_VERSION + '-SNAPSHOT-complete.jar'
+
+
+def jar_exists():
+    """
+    Finds the antlr4 jar.
+    """
+    return os.path.exists(ANTLR4_JAR)
+
+
+def find_g4():
+    """
+    Find all g4 files and return a list of them.
+    The recursive search starts from the directory containing
+    this python file.
+    """
+    file_path = os.path.realpath(__file__)
+    parent_folder = file_path[0:file_path.rindex('/')+1]
+    res = []
+    for cur, _, filenames in os.walk(parent_folder):
+        cur_files = fnmatch.filter(filenames, "*.g4")
+        res += [cur+'/'+cur_file for cur_file in cur_files]
+    return res
+
+
+def gen_parser(grammar):
+    """
+    Generate parser for the input g4 file.
+    """
+    java_home = os.environ['JAVA_HOME']
+    java = java_home + '/bin/java'
+    if not os.path.exists(java):
+        print 'Cannot find java. Check your JAVA_HOME setting.'
+        return
+
+    call([java, '-jar', ANTLR4_JAR, '-Dlanguage=Swift', grammar])
+
+
+if __name__ == '__main__':
+    if not jar_exists():
+        print 'Run "mvn install" in antlr4 project root' + \
+                'first or check mvn settings'
+        exit()
+
+    _ = [gen_parser(f) for f in find_g4()]