4 files changed, 52 insertions, 15 deletions
diff --git a/swift/src/Ice/CommunicatorI.swift b/swift/src/Ice/CommunicatorI.swift
index 0283be06291..bb06b80c7c8 100644
--- a/swift/src/Ice/CommunicatorI.swift
+++ b/swift/src/Ice/CommunicatorI.swift
@@ -15,6 +15,7 @@ class CommunicatorI: LocalObject<ICECommunicator>, Communicator {
 
     let initData: InitializationData
     let valueFactoryManager: ValueFactoryManager = ValueFactoryManagerI()
+    let defaultsAndOverrides: DefaultsAndOverrides
 
     //    required init(initData: InitializationData) {
     //        if let enc = initData.properties?.getProperty(key: "Ice.Default.EncodingVersion"), !enc.isEmpty {
@@ -33,6 +34,7 @@ class CommunicatorI: LocalObject<ICECommunicator>, Communicator {
 
     init(handle: ICECommunicator, initData: InitializationData) {
         self.initData = initData
+        self.defaultsAndOverrides = DefaultsAndOverrides(handle: handle)
         super.init(handle: handle)
     }
 
@@ -190,3 +192,17 @@ class CommunicatorI: LocalObject<ICECommunicator>, Communicator {
         preconditionFailure("Not yet implemented")
     }
 }
+
+public class DefaultsAndOverrides {
+
+    public init(handle: ICECommunicator) {
+
+        var defaultEncoding = EncodingVersion()
+        handle.getDefaultEncoding(major: &defaultEncoding.major, minor: &defaultEncoding.minor)
+        self.defaultEncoding = defaultEncoding
+        self.defaultFormat = FormatType(rawValue: handle.getDefaultFormat())!
+    }
+
+    public let defaultEncoding: EncodingVersion
+    public let defaultFormat: FormatType
+}
diff --git a/swift/src/Ice/InputStream.swift b/swift/src/Ice/InputStream.swift
index 555081f41ed..fc6f64188d2 100644
--- a/swift/src/Ice/InputStream.swift
+++ b/swift/src/Ice/InputStream.swift
@@ -27,9 +27,18 @@ public class InputStream {
     private var minSeqSize: Int32 = 0
     public var sliceValues: Bool = true
 
-    public init(communicator: Communicator,
-                encoding: EncodingVersion = currentEncoding,
-                bytes: [UInt8]) {
+    public convenience init(communicator: Communicator) {
+        self.init(communicator: communicator, bytes: [])
+    }
+
+    public convenience init(communicator: Communicator, bytes: [UInt8]) {
+        let encoding = (communicator as! CommunicatorI).defaultsAndOverrides.defaultEncoding
+        self.init(communicator: communicator, encoding: encoding, bytes: bytes)
+    }
+
+    public required init(communicator: Communicator,
+                         encoding: EncodingVersion,
+                         bytes: [UInt8]) {
         self.communicator = communicator
         self.encoding = encoding
         self.bytes = bytes
@@ -39,11 +48,9 @@ public class InputStream {
         traceSlicing = communicator.getProperties().getPropertyAsIntWithDefault(key: "Ice.Trace.Slicing", value: 0) > 0
     }
 
-    init(communicator: Communicator,
-         encoding: EncodingVersion = currentEncoding,
-         inputStream handle: ICEInputStream) {
+    init(communicator: Communicator, inputStream handle: ICEInputStream) {
         self.communicator = communicator
-        self.encoding = encoding
+        self.encoding = currentEncoding // TODO should we get encoding from ICEInputStream?
         self.handle = handle
         buf = Buffer(start: handle.data(), count: handle.size())
         traceSlicing = communicator.getProperties().getPropertyAsIntWithDefault(key: "Ice.Trace.Slicing", value: 0) > 0
diff --git a/swift/src/Ice/OutputStream.swift b/swift/src/Ice/OutputStream.swift
index 8dcfd0d9c58..e49901441e0 100644
--- a/swift/src/Ice/OutputStream.swift
+++ b/swift/src/Ice/OutputStream.swift
@@ -19,17 +19,17 @@ public class OutputStream {
     private var encapsStack: Encaps!
     private var encapsCache: Encaps?
 
-    public init(communicator: Communicator, encoding: EncodingVersion = currentEncoding) {
+    public convenience init(communicator: Communicator) {
+        let encoding = (communicator as! CommunicatorI).defaultsAndOverrides.defaultEncoding
+        self.init(communicator: communicator, encoding: encoding)
+    }
+
+    public init(communicator: Communicator, encoding: EncodingVersion) {
         self.communicator = communicator
         self.encoding = encoding
         self.encoding_1_0 = (encoding.major == 1 && encoding.minor == 0)
-        buf = Buffer()
-
-        if communicator.getProperties().getPropertyAsIntWithDefault(key: "Ice.Default.SlicedFormat", value: 0) > 0 {
-            format = FormatType.SlicedFormat
-        } else {
-            format = FormatType.CompactFormat
-        }
+        self.buf = Buffer()
+        self.format = (communicator as! CommunicatorI).defaultsAndOverrides.defaultFormat
     }
 
     public func startEncapsulation() {
diff --git a/swift/src/IceObjc/Communicator.mm b/swift/src/IceObjc/Communicator.mm
index d8851091e51..c3f80bead58 100644
--- a/swift/src/IceObjc/Communicator.mm
+++ b/swift/src/IceObjc/Communicator.mm
@@ -15,6 +15,9 @@
 
 #include "IceObjcUtil.h"
 
+#include <Ice/Instance.h>
+#include <Ice/DefaultsAndOverrides.h>
+
 @implementation ICECommunicator
 
 -(instancetype) initWithCppCommunicator:(std::shared_ptr<Ice::Communicator>)communicator
@@ -207,4 +210,15 @@
     return [[ICEProperties alloc] initWithCppProperties:props];
 }
 
+-(void) getDefaultEncoding:(nonnull uint8_t*)major minor:(nonnull uint8_t*)minor
+{
+    auto defaultEncoding = IceInternal::getInstance(_communicator)->defaultsAndOverrides()->defaultEncoding;
+    *major = defaultEncoding.major;
+    *minor = defaultEncoding.minor;
+}
+
+-(uint8_t) getDefaultFormat
+{
+    return static_cast<uint8_t>(IceInternal::getInstance(_communicator)->defaultsAndOverrides()->defaultFormat);
+}
 @end