diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..221e82d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.idea
+.gradle
+build
\ No newline at end of file
diff --git a/delta-codec/build.gradle b/delta-codec/build.gradle
new file mode 100644
index 0000000..d7868c1
--- /dev/null
+++ b/delta-codec/build.gradle
@@ -0,0 +1,20 @@
+plugins {
+    id 'java'
+}
+
+group 'io.ably'
+version '1.0.0'
+
+sourceCompatibility = 1.7
+targetCompatibility = 1.7
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'com.davidehrmann.vcdiff:vcdiff-core:0.1.1'
+    implementation group: 'org.slf4j', name: 'slf4j-nop', version: '1.7.21'
+    implementation 'com.google.code.gson:gson:2.8.5'
+    testCompile group:'junit', name: 'junit', version: '4.12'
+}
diff --git a/delta-codec/src/main/java/io/ably/deltacodec/Base64Coder.java b/delta-codec/src/main/java/io/ably/deltacodec/Base64Coder.java
new file mode 100644
index 0000000..f8f0703
--- /dev/null
+++ b/delta-codec/src/main/java/io/ably/deltacodec/Base64Coder.java
@@ -0,0 +1,239 @@
+package io.ably.deltacodec;
+
+import java.nio.charset.Charset;
+
+//Copyright 2003-2010 Christian d'Heureuse, Inventec Informatik AG, Zurich, Switzerland
+//www.source-code.biz, www.inventec.ch/chdh
+//
+//This module is multi-licensed and may be used under the terms
+//of any of the following licenses:
+//
+//EPL, Eclipse Public License, http://www.eclipse.org/legal
+//LGPL, GNU Lesser General Public License, http://www.gnu.org/licenses/lgpl.html
+//AL, Apache License, http://www.apache.org/licenses
+//BSD, BSD License, http://www.opensource.org/licenses/bsd-license.php
+//
+//Please contact the author if you need another license.
+//This module is provided "as is", without warranties of any kind.
+
+/**
+* A Base64 encoder/decoder.
+*
+* <p>
+* This class is used to encode and decode data in Base64 format as described in RFC 1521.
+*
+* <p>
+* Project home page: <a href="http://www.source-code.biz/base64coder/java/">www.source-code.biz/base64coder/java</a><br>
+* Author: Christian d'Heureuse, Inventec Informatik AG, Zurich, Switzerland<br>
+* Multi-licensed: EPL / LGPL / AL / BSD.
+*/
+public class Base64Coder {
+
+//The line separator string of the operating system.
+private static final String systemLineSeparator = System.getProperty("line.separator");
+
+//Mapping table from 6-bit nibbles to Base64 characters.
+private static char[]    map1 = new char[64];
+static {
+ int i=0;
+ for (char c='A'; c<='Z'; c++) map1[i++] = c;
+ for (char c='a'; c<='z'; c++) map1[i++] = c;
+ for (char c='0'; c<='9'; c++) map1[i++] = c;
+ map1[i++] = '+'; map1[i++] = '/'; }
+
+//Mapping table from Base64 characters to 6-bit nibbles.
+private static byte[]    map2 = new byte[128];
+static {
+ for (int i=0; i<map2.length; i++) map2[i] = -1;
+ for (int i=0; i<64; i++) map2[map1[i]] = (byte)i;
+ /* URL safe Base 64 decoding */
+ map2['-'] = map2['+']; map2['_'] = map2['/'];
+}
+
+/**
+* Encodes a string into Base64 format.
+* No blanks or line breaks are inserted.
+* @param s  A String to be encoded.
+* @return   A String containing the Base64 encoded data.
+*/
+public static String encodeString (String s) {
+return new String(encode(s.getBytes(Charset.forName("UTF-8")))); }
+
+/**
+* Encodes a byte array into Base 64 format and breaks the output into lines of 76 characters.
+* This method is compatible with <code>sun.misc.BASE64Encoder.encodeBuffer(byte[])</code>.
+* @param in  An array containing the data bytes to be encoded.
+* @return    A String containing the Base64 encoded data, broken into lines.
+*/
+public static String encodeLines (byte[] in) {
+return encodeLines(in, 0, in.length, 76, systemLineSeparator); }
+
+/**
+* Encodes a byte array into Base 64 format and breaks the output into lines.
+* @param in            An array containing the data bytes to be encoded.
+* @param iOff          Offset of the first byte in <code>in</code> to be processed.
+* @param iLen          Number of bytes to be processed in <code>in</code>, starting at <code>iOff</code>.
+* @param lineLen       Line length for the output data. Should be a multiple of 4.
+* @param lineSeparator The line separator to be used to separate the output lines.
+* @return              A String containing the Base64 encoded data, broken into lines.
+*/
+public static String encodeLines (byte[] in, int iOff, int iLen, int lineLen, String lineSeparator) {
+int blockLen = (lineLen*3) / 4;
+if (blockLen <= 0) throw new IllegalArgumentException();
+int lines = (iLen+blockLen-1) / blockLen;
+int bufLen = ((iLen+2)/3)*4 + lines*lineSeparator.length();
+StringBuilder buf = new StringBuilder(bufLen);
+int ip = 0;
+while (ip < iLen) {
+ int l = Math.min(iLen-ip, blockLen);
+ buf.append (encode(in, iOff+ip, l));
+ buf.append (lineSeparator);
+ ip += l; }
+return buf.toString(); }
+
+/**
+* Encodes a byte array into Base64 format.
+* No blanks or line breaks are inserted in the output.
+* @param in  An array containing the data bytes to be encoded.
+* @return    A character array containing the Base64 encoded data.
+*/
+public static char[] encode (byte[] in) {
+return encode(in, 0, in.length); }
+
+/**
+* Encodes a byte array into Base64 format.
+* No blanks or line breaks are inserted in the output.
+* @param in  An array containing the data bytes to be encoded.
+* @return    A String containing the Base64 encoded data.
+*/
+public static String encodeToString (byte[] in) {
+return new String(encode(in, 0, in.length)); }
+
+/**
+* Encodes a byte array into Base64 format.
+* No blanks or line breaks are inserted in the output.
+* @param in    An array containing the data bytes to be encoded.
+* @param iLen  Number of bytes to process in <code>in</code>.
+* @return      A character array containing the Base64 encoded data.
+*/
+public static char[] encode (byte[] in, int iLen) {
+return encode(in, 0, iLen); }
+
+/**
+* Encodes a byte array into Base64 format.
+* No blanks or line breaks are inserted in the output.
+* @param in    An array containing the data bytes to be encoded.
+* @param iOff  Offset of the first byte in <code>in</code> to be processed.
+* @param iLen  Number of bytes to process in <code>in</code>, starting at <code>iOff</code>.
+* @return      A character array containing the Base64 encoded data.
+*/
+public static char[] encode (byte[] in, int iOff, int iLen) {
+int oDataLen = (iLen*4+2)/3;       // output length without padding
+int oLen = ((iLen+2)/3)*4;         // output length including padding
+char[] out = new char[oLen];
+int ip = iOff;
+int iEnd = iOff + iLen;
+int op = 0;
+while (ip < iEnd) {
+ int i0 = in[ip++] & 0xff;
+ int i1 = ip < iEnd ? in[ip++] & 0xff : 0;
+ int i2 = ip < iEnd ? in[ip++] & 0xff : 0;
+ int o0 = i0 >>> 2;
+ int o1 = ((i0 &   3) << 4) | (i1 >>> 4);
+ int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6);
+ int o3 = i2 & 0x3F;
+ out[op++] = map1[o0];
+ out[op++] = map1[o1];
+ out[op] = op < oDataLen ? map1[o2] : '='; op++;
+ out[op] = op < oDataLen ? map1[o3] : '='; op++; }
+return out; }
+
+/**
+* Decodes a string from Base64 format.
+* No blanks or line breaks are allowed within the Base64 encoded input data.
+* @param s  A Base64 String to be decoded.
+* @return   A String containing the decoded data.
+* @throws   IllegalArgumentException If the input is not valid Base64 encoded data.
+*/
+public static String decodeString (String s) {
+return new String(decode(s)); }
+
+/**
+* Decodes a byte array from Base64 format and ignores line separators, tabs and blanks.
+* CR, LF, Tab and Space characters are ignored in the input data.
+* This method is compatible with <code>sun.misc.BASE64Decoder.decodeBuffer(String)</code>.
+* @param s  A Base64 String to be decoded.
+* @return   An array containing the decoded data bytes.
+* @throws   IllegalArgumentException If the input is not valid Base64 encoded data.
+*/
+public static byte[] decodeLines (String s) {
+char[] buf = new char[s.length()];
+int p = 0;
+for (int ip = 0; ip < s.length(); ip++) {
+ char c = s.charAt(ip);
+ if (c != ' ' && c != '\r' && c != '\n' && c != '\t')
+    buf[p++] = c; }
+return decode(buf, 0, p); }
+
+/**
+* Decodes a byte array from Base64 format.
+* No blanks or line breaks are allowed within the Base64 encoded input data.
+* @param s  A Base64 String to be decoded.
+* @return   An array containing the decoded data bytes.
+* @throws   IllegalArgumentException If the input is not valid Base64 encoded data.
+*/
+public static byte[] decode (String s) {
+return decode(s.toCharArray()); }
+
+/**
+* Decodes a byte array from Base64 format.
+* No blanks or line breaks are allowed within the Base64 encoded input data.
+* @param in  A character array containing the Base64 encoded data.
+* @return    An array containing the decoded data bytes.
+* @throws    IllegalArgumentException If the input is not valid Base64 encoded data.
+*/
+public static byte[] decode (char[] in) {
+return decode(in, 0, in.length); }
+
+/**
+* Decodes a byte array from Base64 format.
+* No blanks or line breaks are allowed within the Base64 encoded input data.
+* @param in    A character array containing the Base64 encoded data.
+* @param iOff  Offset of the first character in <code>in</code> to be processed.
+* @param iLen  Number of characters to process in <code>in</code>, starting at <code>iOff</code>.
+* @return      An array containing the decoded data bytes.
+* @throws      IllegalArgumentException If the input is not valid Base64 encoded data.
+*/
+public static byte[] decode (char[] in, int iOff, int iLen) {
+if (iLen%4 != 0) throw new IllegalArgumentException ("Length of Base64 encoded input string is not a multiple of 4.");
+while (iLen > 0 && in[iOff+iLen-1] == '=') iLen--;
+int oLen = (iLen*3) / 4;
+byte[] out = new byte[oLen];
+int ip = iOff;
+int iEnd = iOff + iLen;
+int op = 0;
+while (ip < iEnd) {
+ int i0 = in[ip++];
+ int i1 = in[ip++];
+ int i2 = ip < iEnd ? in[ip++] : 'A';
+ int i3 = ip < iEnd ? in[ip++] : 'A';
+ if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127)
+    throw new IllegalArgumentException ("Illegal character in Base64 encoded data.");
+ int b0 = map2[i0];
+ int b1 = map2[i1];
+ int b2 = map2[i2];
+ int b3 = map2[i3];
+ if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0)
+    throw new IllegalArgumentException ("Illegal character in Base64 encoded data.");
+ int o0 = ( b0       <<2) | (b1>>>4);
+ int o1 = ((b1 & 0xf)<<4) | (b2>>>2);
+ int o2 = ((b2 &   3)<<6) |  b3;
+ out[op++] = (byte)o0;
+ if (op<oLen) out[op++] = (byte)o1;
+ if (op<oLen) out[op++] = (byte)o2; }
+return out; }
+
+//Dummy constructor.
+private Base64Coder() {}
+
+} // end class Base64Coder
\ No newline at end of file
diff --git a/delta-codec/src/main/java/io/ably/deltacodec/DeltaApplicationResult.java b/delta-codec/src/main/java/io/ably/deltacodec/DeltaApplicationResult.java
new file mode 100644
index 0000000..0a882b7
--- /dev/null
+++ b/delta-codec/src/main/java/io/ably/deltacodec/DeltaApplicationResult.java
@@ -0,0 +1,40 @@
+package io.ably.deltacodec;
+
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Contains and manages the result of delta application
+ * */
+public class DeltaApplicationResult {
+    private byte[] data;
+
+    DeltaApplicationResult(byte[] data) {
+        this.data = data;
+    }
+
+    /**
+     * Exports the delta application result as byte[]
+     * @return byte[] representation of this delta application result
+     */
+    public byte[] asByteArray() {
+        return this.data;
+    }
+
+    /**
+     * Exports the delta application result as string assuming the bytes
+     * in the result represent an UTF-8 encoded string
+     * @return The UTF-8 string representation of this delta application result
+     */
+    public String asUtf8String() {
+        return new String(this.data, StandardCharsets.UTF_8);
+    }
+
+    /**
+     * Exports the delta application result as object assuming the bytes in
+     * the result represent an UTF-8 encoded JSON string
+     * @return The object representation of this delta application result
+     */
+    public Object asObject() {
+        return JsonHelper.getInstance().deserialize(this.asUtf8String());
+    }
+}
diff --git a/delta-codec/src/main/java/io/ably/deltacodec/JsonHelper.java b/delta-codec/src/main/java/io/ably/deltacodec/JsonHelper.java
new file mode 100644
index 0000000..ebba75d
--- /dev/null
+++ b/delta-codec/src/main/java/io/ably/deltacodec/JsonHelper.java
@@ -0,0 +1,22 @@
+package io.ably.deltacodec;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+
+class JsonHelper {
+    private static final JsonHelper instance = new JsonHelper();
+
+    private final Gson gson = new Gson();
+
+    static JsonHelper getInstance() {
+        return instance;
+    }
+
+    String serialize(Object obj) {
+        return this.gson.toJson(obj);
+    }
+
+    Object deserialize(String str) {
+        return this.gson.fromJson(str, JsonElement.class);
+    }
+}
diff --git a/delta-codec/src/main/java/io/ably/deltacodec/SequenceContinuityException.java b/delta-codec/src/main/java/io/ably/deltacodec/SequenceContinuityException.java
new file mode 100644
index 0000000..a91b871
--- /dev/null
+++ b/delta-codec/src/main/java/io/ably/deltacodec/SequenceContinuityException.java
@@ -0,0 +1,10 @@
+package io.ably.deltacodec;
+
+/**
+ * Thrown when {@link VcdiffDecoder}'s built-in sequence continuity check fails
+ */
+public class SequenceContinuityException extends Exception {
+    SequenceContinuityException(String expectedId, String actualId) {
+        super("Sequence continuity check failed - the provided id (" + expectedId + ") does not match the last preserved sequence id (" + actualId + ")");
+    }
+}
diff --git a/delta-codec/src/main/java/io/ably/deltacodec/VcdiffDecoder.java b/delta-codec/src/main/java/io/ably/deltacodec/VcdiffDecoder.java
new file mode 100644
index 0000000..487f7cd
--- /dev/null
+++ b/delta-codec/src/main/java/io/ably/deltacodec/VcdiffDecoder.java
@@ -0,0 +1,129 @@
+package io.ably.deltacodec;
+
+import com.davidehrmann.vcdiff.VCDiffDecoder;
+import com.davidehrmann.vcdiff.VCDiffDecoderBuilder;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
+/**
+ * VCDIFF decoder capable of processing continuous sequences of consecutively generated VCDIFFs
+ */
+public class VcdiffDecoder {
+    private final VCDiffDecoder decoder = VCDiffDecoderBuilder.builder().buildSimple();
+    private byte[] base;
+    private String baseId;
+
+    /**
+     * Applies the {@code delta} to the result of applying the previous delta or to the base data
+     * if no previous delta has been applied yet. Base data has to be set by {@link VcdiffDecoder#setBase(Object)}
+     * before calling this method for the first time.
+     * @param delta The delta to be applied
+     * @return {@link DeltaApplicationResult} instance
+     * @throws IOException Delta application failed
+     * @throws IllegalStateException The decoder is not initialized by calling {@link VcdiffDecoder#setBase(Object)}
+     * @throws IllegalArgumentException The provided {@code delta} is not a valid VCDIFF
+     */
+    public DeltaApplicationResult applyDelta(Object delta) throws IllegalStateException, IllegalArgumentException, IOException {
+        if (this.base == null) {
+            throw new IllegalStateException("Uninitialized decoder - setBase() should be called first");
+        }
+        byte[] deltaAsByteArray = tryConvertToDeltaByteArray(delta);
+        if (deltaAsByteArray == null || !hasVcdiffHeader(deltaAsByteArray)) {
+            throw new IllegalArgumentException("The provided delta is not a valid VCDIFF delta");
+        }
+        ByteArrayOutputStream decoded = new ByteArrayOutputStream();
+        this.decoder.decode(this.base, deltaAsByteArray, decoded);
+        this.base = decoded.toByteArray();
+        // Return a copy to avoid future delta application failures if the returned array is modified
+        return new DeltaApplicationResult(decoded.toByteArray());
+    }
+
+    /**
+     * Applies the {@code delta} to the result of applying the previous delta or to the base data
+     * if no previous delta has been applied yet. Base data has to be set by {@link VcdiffDecoder#setBase(Object, String)}
+     * before calling this method for the first time.
+     * @param delta The delta to be applied
+     * @return {@link DeltaApplicationResult} instance
+     * @throws IOException Delta application failed
+     * @throws IllegalStateException The decoder is not initialized by calling {@link VcdiffDecoder#setBase(Object, String)}
+     * @throws IllegalArgumentException The provided {@code delta} is not a valid VCDIFF
+     * @throws SequenceContinuityException The provided {@code baseId} does not match the last preserved sequence ID
+     */
+    public DeltaApplicationResult applyDelta(Object delta, String deltaId, String baseId) throws SequenceContinuityException, IllegalStateException, IllegalArgumentException, IOException {
+        if (!Objects.equals(this.baseId, baseId)) {
+            throw new SequenceContinuityException(baseId, this.baseId);
+        }
+        DeltaApplicationResult result = this.applyDelta(delta);
+        this.baseId = deltaId;
+        return result;
+    }
+
+    /**
+     * Sets the base object used for the next delta application (see {@link VcdiffDecoder#applyDelta(Object)}).
+     * @param newBase The base object to be set
+     * @throws IllegalArgumentException The provided {@code newBase} parameter is null
+     */
+    public void setBase(Object newBase) throws IllegalArgumentException {
+        if (newBase == null) {
+            throw new IllegalArgumentException("newBase cannot be null");
+        }
+        
+        this.base = convertToByteArray(newBase);
+    }
+
+    /**
+     * Sets the base object used for the next delta application (see {@link VcdiffDecoder#applyDelta(Object, String, String)}).
+     * @param newBase The base object to be set
+     * @param newBaseId (Optional) The {@code newBase}'s sequence ID, to be used for sequence continuity checking
+     *                  when delta is applied using {@link VcdiffDecoder#applyDelta(Object, String, String)}
+     * @throws IllegalArgumentException The provided {@code newBase} parameter is null
+     */
+    public void setBase(Object newBase, String newBaseId) {
+        this.setBase(newBase);
+        this.baseId = newBaseId;
+    }
+
+    private static boolean hasVcdiffHeader(byte[] delta) {
+        return delta[0] == (byte)0xd6 &&
+                delta[1] == (byte)0xc3 &&
+                delta[2] == (byte)0xc4 &&
+                delta[3] == (byte)0;
+    }
+
+    private static byte[] convertToByteArray(Object data) {
+        if (data instanceof byte[]) {
+            return (byte[])data;
+        } else if (data instanceof String) {
+            String dataAsString = (String)data;
+            byte[] base64DecodeResult = tryConvertFromBase64String(dataAsString);
+            if (base64DecodeResult != null) {
+                return base64DecodeResult;
+            } else {
+                return dataAsString.getBytes(StandardCharsets.UTF_8);
+            }
+        } else {
+            return JsonHelper.getInstance().serialize(data).getBytes(StandardCharsets.UTF_8);
+        }
+    }
+
+    private static byte[] tryConvertToDeltaByteArray(Object obj) {
+        if (obj instanceof byte[]) {
+            return (byte[])obj;
+        } else if (obj instanceof String) {
+            return tryConvertFromBase64String((String)obj);
+        } else {
+            return null;
+        }
+    }
+
+    private static byte[] tryConvertFromBase64String(String str) {
+        try {
+            return Base64Coder.decode(str);
+        } catch (IllegalArgumentException e) {
+            return null;
+        }
+    }
+}
diff --git a/delta-sample-app/build.gradle b/delta-sample-app/build.gradle
new file mode 100644
index 0000000..32ce1fa
--- /dev/null
+++ b/delta-sample-app/build.gradle
@@ -0,0 +1,19 @@
+plugins {
+    id 'java'
+}
+
+group 'io.ably'
+version '1.0.0'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+    jcenter()
+}
+
+dependencies {
+    implementation project(':delta-codec')
+    implementation 'io.ably:ably-java:1.1.3'
+    implementation 'com.google.code.gson:gson:2.8.5'
+}
diff --git a/delta-sample-app/src/main/java/io/ably/deltasampleapp/Main.java b/delta-sample-app/src/main/java/io/ably/deltasampleapp/Main.java
new file mode 100644
index 0000000..4cfc8da
--- /dev/null
+++ b/delta-sample-app/src/main/java/io/ably/deltasampleapp/Main.java
@@ -0,0 +1,78 @@
+package io.ably.deltasampleapp;
+
+import io.ably.deltacodec.VcdiffDecoder;
+import io.ably.lib.realtime.*;
+import io.ably.lib.types.AblyException;
+import io.ably.lib.types.Message;
+import io.ably.lib.util.Serialisation;
+
+public class Main {
+    public static void main(String[] args) throws AblyException {
+        AblyRealtime ably = new AblyRealtime("HG2KVw.AjZP_A:W7VXUG9yw1-Cza6u");
+        Channel channel = ably.channels.get("[?delta=vcdiff]delta-sample-app");
+        VcdiffDecoder channelDecoder = new VcdiffDecoder();
+        ably.connection.on(ConnectionState.connected, new ConnectionStateListener() {
+            @Override
+            public void onConnectionStateChanged(ConnectionStateChange state) {
+                try {
+                    channel.subscribe(new ChannelBase.MessageListener() {
+                        @Override
+                        public void onMessage(Message message) {
+                            Object data = message.data;
+                            try {
+                                MessageExtras extras = Serialisation.gson.fromJson(message.extras, MessageExtras.class);
+                                if (extras != null && extras.delta != null) {
+                                    data = channelDecoder.applyDelta(data, message.id, extras.delta.from).asUtf8String();
+                                } else {
+                                    channelDecoder.setBase(data, message.id);
+                                }
+                            } catch (Exception e) {
+                                /* Delta decoder error */
+                            }
+
+                            /* Process decoded data */
+                            System.out.println(Serialisation.gson.fromJson((String)data, Data.class).toString());
+                        }
+                    });
+                } catch (AblyException e) {
+                    /* Subscribe error */
+                }
+
+                Data data = new Data();
+                data.foo = "bar";
+                data.count = 1;
+                data.status = "active";
+
+                try {
+                    channel.publish("data", Serialisation.gson.toJson(data));
+                    data.count++;
+                    channel.publish("data", Serialisation.gson.toJson(data));
+                    data.status = "inactive";
+                    channel.publish("data", Serialisation.gson.toJson(data));
+                } catch (Exception e) {
+                    /* Publish error */
+                }
+            }
+        });
+    }
+
+    private class MessageExtras {
+        public DeltaExtras delta;
+
+        private class DeltaExtras {
+            public String format;
+            public String from;
+        }
+    }
+
+    private static class Data {
+        public String foo;
+        public int count;
+        public String status;
+
+        @Override
+        public String toString() {
+            return "foo = " + this.foo + "; count = " + this.count + "; status = " + this.status;
+        }
+    }
+}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..87b738c
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..44e7c4d
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..af6708f
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..0f8d593
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..403d1e4
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,3 @@
+rootProject.name = 'delta-codec-java'
+include 'delta-codec'
+include 'delta-sample-app'