Merge branch 'development'

.gitattributes

@@ -0,0 +1,3 @@
+gradlew                                     text eol=lf
+gradlew.bat                                 text eol=crlf
+gradle/wrapper/gradle-wrapper.properties    text eol=lf

.gitignore

@@ -9,7 +9,4 @@ out/
 ## GRADLE ##
 .gradle/
 build/
-gradle/
-gradlew
-gradlew.bat
 publish.gradle

README.MD

@@ -1,16 +1,62 @@
 # NBT Lib
 
-![version: v1.0-RC](https://img.shields.io/badge/version-v1.0--RC-a0a.svg?style=flat)
+![version: v1.1-RC](https://img.shields.io/badge/version-v1.1--RC-a0a.svg?style=flat)
-![coverage: 81%](https://img.shields.io/badge/coverage-81%25-yellowgreen.svg?style=flat)
+![coverage: 93%](https://img.shields.io/badge/coverage-93%25-darkgreen.svg?style=flat)
 
-Библиотека для работы с NBT (Named Binary Tag) в отрыве от Minecraft.
+Библиотека для работы с NBT (Named Binary Tag).
+
+Начиная с версии `1.1-RC` разделена на две составляющие: теги и кодеки. Последние занимаются (де)сериализацией тегов.
+
+## Примеры работы с NBT
+
+**Создание тега типа String:**
+
+```java
+TagString tagString = new TagString();
+tagString.setValue("hello!");
+```
+
+или в одну строчку
+
+```java
+TagString tagString = new TagString("hello!");
+```
+
+**Создание тега типа Compound:** 
+
+```java
+TagCompound tagCompound = new TagCompound();
+tagCompound.getValue().add(new TagLong("Seed", 1234567890));
+```
+
+## Сериализация NBT
+
+Сериализация в бинарный формат Minecraft Vanilla выполняется библиотекой `nbt-vanilla-codec`.
+
+Пример сериализации тега типа String в файл
+
+```java
+NbtOutputStream nbtOutputStream = new NbtOutputStream(new FileOutputStream("somefile.bin"));
+nbtOutputStream.writeTag(new TagString("hello!"));
+nbtOutputStream.close();
+```
+
+По такому же принципу происходит и десериализация
+
+```java
+NbtInputStream nbtInputStream = new NbtInputStream(new FileInputStream("somefile.bin"));
+Tag tag = nbtInputStream.readTag();
+nbtInputStream.close();
+
+if (tag.getType() == TypeTag.STRING) {
+    TagString tagString = tag.asTagString();
+}
+```
 
 ## Подключение к проекту
 
 ### Maven
 
-Добавляем сторонний репозитарий
-
 ```xml
 <repositories>
     <repository>
@@ -18,67 +64,34 @@
         <url>https://dmx-mc-project.gitlab.io/maven-repository/</url>
     </repository>
 </repositories>
-```
 
-Добавляем dependency к себе в проект
-
-```xml
 <dependencies>
     <dependency>
-        <groupId>mc-project</groupId>
+        <groupId>mc-project.nbt</groupId>
-        <artifactId>nbt-lib</artifactId>
+        <artifactId>nbt</artifactId>
-        <version>1.0-RC</version>
+        <version>1.1-RC</version>
+    </dependency>
+
+    <dependency>
+        <groupId>mc-project.nbt.codec</groupId>
+        <artifactId>nbt-vanilla-codec</artifactId>
+        <version>1.1-RC</version>
     </dependency>
 </dependencies>
-
 ```
 
 ### Gradle
 
-Добавляем сторонний репозитарий
-
 ```groovy
 repositories {
-    maven { url 'https://dmx-mc-project.gitlab.io/maven-repository/' }
+    maven {
+        name 'mc-project' 
+        url 'https://dmx-mc-project.gitlab.io/maven-repository/' 
+    }
+}
+
+dependencies {
+    implementation (group: 'mc-project.nbt', name: 'nbt', version: '1.1-RC')
+    implementation (group: 'mc-project.nbt.codec', name: 'nbt-vanilla-codec', version: '1.1-RC')
 }
 ```
-
-Добавляем dependency к себе в проект
-
-```groovy
-implementation (group: 'mc-project', name: 'nbt-lib', version: '1.0-RC')
-```
-
-## Использование
-
-### Чтение
-
-Для чтения NBT из потока (`InputStream`) используется класс `NbtInputStream`:
-
-```java
-NbtInputStream nbtInputStream = new NbtInputStream(inputStream);
-Tag tag = nbtInputStream.readTag();
-```
-
-Если поток данных предполагается сжатым (GZip), то вторым параметром в конструкторе `NbtInputStream` указываем на это:
-
-```java
-NbtInputStream nbtInputStream = new NbtInputStream(inputStream, true);
-Tag tag = nbtInputStream.readTag();
-```
-
-### Запись
-
-Для записи NBT в поток (`OutputStream`) используется класс `NbtOutputStream`:
-
-```java
-NbtOutputStream nbtOutputStream = new NbtOutputStream(outputStream);
-nbtOutputStream.writeTag(new TagString("Hello world"));
-```
-
-Если необходимо сжатие данных (GZip), то вторым параметром в конструкторе `NbtOutputStream` указываем на это:
-
-```java
-NbtOutputStream nbtOutputStream = new NbtOutputStream(outputStream, true);
-nbtOutputStream.writeTag(new TagString("Hello world"));
-```

build.gradle

@@ -1,20 +1,33 @@
-group = 'mc-project'
+/* Gradle 5.3 */
-version = '1.0-RC'
 
+wrapper {
+    gradleVersion = '5.3'
+    distributionType = Wrapper.DistributionType.ALL
+}
+
+subprojects {
     apply plugin: 'java'
     apply plugin: 'jacoco'
 
-repositories {
+    def publishScript = file(rootProject.getProjectDir().getPath() + '/publish.gradle')
-    mavenLocal()
+    if (publishScript.exists()) {
-    mavenCentral()
+        apply from: publishScript.path
     }
 
+    project.group = projectGroup
+    project.version = projectVersion
+
     compileJava {
         sourceCompatibility = 1.8
         targetCompatibility = 1.8
         options.encoding = 'UTF-8'
     }
 
+    repositories {
+        mavenLocal()
+        mavenCentral()
+    }
+
     ext {
         slf4j_version  = '1.7.25'
         lombok_version = '1.18.2'
@@ -41,5 +54,6 @@ test {
     }
 
     jacoco {
-    toolVersion = '0.8.3'
+        toolVersion = '0.8.5'
+    }
 }

gradle.properties

@@ -0,0 +1,2 @@
+projectGroup=mc-project.nbt
+projectVersion=1.1-RC

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Apr 27 14:14:33 MSK 2020
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.3-all.zip
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -0,0 +1,188 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  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 "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+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" "$@"

gradlew.bat

@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      http://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@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" "-Xms64m"
+
+@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

nbt/src/main/java/mc/nbt/TypeTag.java

@@ -22,7 +22,7 @@ public enum TypeTag {
     LONG_ARRAY(12, TagLongArray.class);
 
     public static Tag getTagById(int id) {
-        TypeTag type = getTypeById(id);
+        TypeTag type = valueOfTypeId(id);
         try {
             return type.classTag.newInstance();
         } catch (InstantiationException | IllegalAccessException e) {
@@ -30,7 +30,7 @@ public enum TypeTag {
         }
     }
 
-    public static TypeTag getTypeById(int id) {
+    public static TypeTag valueOfTypeId(int id) {
         for (TypeTag type : TypeTag.values()) {
             if (type.id == id) {
                 return type;

nbt/src/main/java/mc/nbt/tag/Tag.java

@@ -3,10 +3,6 @@ package mc.nbt.tag;
 import lombok.Getter;
 import lombok.Setter;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 public abstract class Tag {
 
@@ -16,10 +12,6 @@ public abstract class Tag {
 
     public abstract TypeTag getType();
 
-    public abstract void readSelf(NbtInputStream nbtInputStream) throws IOException;
-
-    public abstract void writeSelf(NbtOutputStream nbtOutputStream) throws IOException;
-
     public TagByte asTagByte() {
         return (TagByte) this;
     }

nbt/src/main/java/mc/nbt/tag/TagByte.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,14 +27,4 @@ public class TagByte extends Tag {
     public TypeTag getType() {
         return TypeTag.BYTE;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = nbtInputStream.readByte();
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeByte(value);
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagByteArray.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,16 +27,4 @@ public class TagByteArray extends Tag {
     public TypeTag getType() {
         return TypeTag.BYTE_ARRAY;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = new byte[nbtInputStream.readInt()];
-        nbtInputStream.read(value); //FIXME
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeInt(value.length);
-        nbtOutputStream.write(value);
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagCompound.java

@@ -0,0 +1,32 @@
+package mc.nbt.tag;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import mc.nbt.TypeTag;
+
+import java.util.List;
+
+@NoArgsConstructor
+@ToString(callSuper = true)
+public class TagCompound extends Tag {
+
+    @Getter
+    @Setter
+    private List<Tag> value;
+
+    public TagCompound(List<Tag> value) {
+        setValue(value);
+    }
+
+    public TagCompound(String name, List<Tag> value) {
+        this(value);
+        setName(name);
+    }
+
+    @Override
+    public TypeTag getType() {
+        return TypeTag.COMPOUND;
+    }
+}

nbt/src/main/java/mc/nbt/tag/TagDouble.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,14 +27,4 @@ public class TagDouble extends Tag {
     public TypeTag getType() {
         return TypeTag.DOUBLE;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = nbtInputStream.readDouble();
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeDouble(value);
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagEnd.java

@@ -1,11 +1,14 @@
 package mc.nbt.tag;
 
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
 
 public class TagEnd extends Tag {
 
+    public static final TagEnd INSTANCE = new TagEnd();
+
+    TagEnd() {
+    }
+
     @Override
     public void setName(String name) {
         throw new UnsupportedOperationException();
@@ -20,14 +23,4 @@ public class TagEnd extends Tag {
     public TypeTag getType() {
         return TypeTag.END;
     }
-
-    @lombok.Generated // Dirt hack for jacoco
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) {
-    }
-
-    @lombok.Generated // Dirt hack for jacoco
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) {
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagFloat.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,14 +27,4 @@ public class TagFloat extends Tag {
     public TypeTag getType() {
         return TypeTag.FLOAT;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = nbtInputStream.readFloat();
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeFloat(value);
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagInt.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,14 +27,4 @@ public class TagInt extends Tag {
     public TypeTag getType() {
         return TypeTag.INT;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = nbtInputStream.readInt();
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeInt(value);
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagIntArray.java

@@ -0,0 +1,30 @@
+package mc.nbt.tag;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import mc.nbt.TypeTag;
+
+@NoArgsConstructor
+@ToString(callSuper = true)
+public class TagIntArray extends Tag {
+
+    @Getter
+    @Setter
+    private int[] value;
+
+    public TagIntArray(int[] value) {
+        setValue(value);
+    }
+
+    public TagIntArray(String name, int[] value) {
+        this(value);
+        setName(name);
+    }
+
+    @Override
+    public TypeTag getType() {
+        return TypeTag.INT_ARRAY;
+    }
+}

nbt/src/main/java/mc/nbt/tag/TagList.java

@@ -5,11 +5,7 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
 
-import java.io.IOException;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 
@@ -52,30 +48,4 @@ public class TagList extends Tag {
     public TypeTag getType() {
         return TypeTag.LIST;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        typeList = TypeTag.getTypeById(nbtInputStream.readByte());
-
-        int size = nbtInputStream.readInt();
-        if (size > 0) {
-            value = new ArrayList<>(size);
-
-            for (int i = 0; i < size; i++) {
-                Tag tag = TypeTag.getTagById(typeList.getId());
-                tag.readSelf(nbtInputStream);
-                value.add(tag);
-            }
-        }
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeByte(typeList.getId());
-        nbtOutputStream.writeInt(value.size());
-
-        for (Tag tag : value) {
-            tag.writeSelf(nbtOutputStream);
-        }
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagLong.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,14 +27,4 @@ public class TagLong extends Tag {
     public TypeTag getType() {
         return TypeTag.LONG;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = nbtInputStream.readLong();
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeLong(value);
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagLongArray.java

@@ -0,0 +1,30 @@
+package mc.nbt.tag;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import mc.nbt.TypeTag;
+
+@NoArgsConstructor
+@ToString(callSuper = true)
+public class TagLongArray extends Tag {
+
+    @Getter
+    @Setter
+    private long[] value;
+
+    public TagLongArray(long[] value) {
+        setValue(value);
+    }
+
+    public TagLongArray(String name, long[] value) {
+        this(value);
+        setName(name);
+    }
+
+    @Override
+    public TypeTag getType() {
+        return TypeTag.LONG_ARRAY;
+    }
+}

nbt/src/main/java/mc/nbt/tag/TagShort.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,14 +27,4 @@ public class TagShort extends Tag {
     public TypeTag getType() {
         return TypeTag.SHORT;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = nbtInputStream.readShort();
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeShort(value);
-    }
 }

nbt/src/main/java/mc/nbt/tag/TagString.java

@@ -5,10 +5,6 @@ import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
 import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
 
 @NoArgsConstructor
 @ToString(callSuper = true)
@@ -31,14 +27,4 @@ public class TagString extends Tag {
     public TypeTag getType() {
         return TypeTag.STRING;
     }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        value = nbtInputStream.readString();
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeString(value);
-    }
 }

settings.gradle

@@ -1,2 +1,4 @@
 rootProject.name = 'nbt-lib'
 
+include('nbt')
+include('vanilla-codec')

src/main/java/mc/nbt/tag/TagCompound.java

@@ -1,58 +0,0 @@
-package mc.nbt.tag;
-
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.Setter;
-import lombok.ToString;
-import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
-
-@NoArgsConstructor
-@ToString(callSuper = true)
-public class TagCompound extends Tag {
-
-    @Getter
-    @Setter
-    private List<Tag> value;
-
-    public TagCompound(List<Tag> value) {
-        setValue(value);
-    }
-
-    public TagCompound(String name, List<Tag> value) {
-        this(value);
-        setName(name);
-    }
-
-    @Override
-    public TypeTag getType() {
-        return TypeTag.COMPOUND;
-    }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) {
-        value = new ArrayList<>();
-
-        while (true) {
-            Tag tag = nbtInputStream.readTag();
-            if (tag.getType() == TypeTag.END) {
-                break;
-            }
-
-            value.add(tag);
-        }
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        for (Tag tag : value) {
-            nbtOutputStream.writeTag(tag);
-        }
-        nbtOutputStream.writeTag(new TagEnd());
-    }
-}

src/main/java/mc/nbt/tag/TagIntArray.java

@@ -1,52 +0,0 @@
-package mc.nbt.tag;
-
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.Setter;
-import lombok.ToString;
-import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
-
-@NoArgsConstructor
-@ToString(callSuper = true)
-public class TagIntArray extends Tag {
-
-    @Getter
-    @Setter
-    private int[] value;
-
-    public TagIntArray(int[] value) {
-        setValue(value);
-    }
-
-    public TagIntArray(String name, int[] value) {
-        this(value);
-        setName(name);
-    }
-
-    @Override
-    public TypeTag getType() {
-        return TypeTag.INT_ARRAY;
-    }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        int count = nbtInputStream.readInt();
-        value = new int[count];
-
-        for (int i = 0; i < count; i++) {
-            value[i] = nbtInputStream.readInt();
-        }
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeInt(value.length);
-        for (int item : value) {
-            nbtOutputStream.writeInt(item);
-        }
-    }
-}

src/main/java/mc/nbt/tag/TagLongArray.java

@@ -1,52 +0,0 @@
-package mc.nbt.tag;
-
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.Setter;
-import lombok.ToString;
-import mc.nbt.TypeTag;
-import mc.nbt.io.NbtInputStream;
-import mc.nbt.io.NbtOutputStream;
-
-import java.io.IOException;
-
-@NoArgsConstructor
-@ToString(callSuper = true)
-public class TagLongArray extends Tag {
-
-    @Getter
-    @Setter
-    private long[] value;
-
-    public TagLongArray(long[] value) {
-        setValue(value);
-    }
-
-    public TagLongArray(String name, long[] value) {
-        this(value);
-        setName(name);
-    }
-
-    @Override
-    public TypeTag getType() {
-        return TypeTag.LONG_ARRAY;
-    }
-
-    @Override
-    public void readSelf(NbtInputStream nbtInputStream) throws IOException {
-        int count = nbtInputStream.readInt();
-        value = new long[count];
-
-        for (int i = 0; i < count; i++) {
-            value[i] = nbtInputStream.readLong();
-        }
-    }
-
-    @Override
-    public void writeSelf(NbtOutputStream nbtOutputStream) throws IOException {
-        nbtOutputStream.writeInt(value.length);
-        for (long item : value) {
-            nbtOutputStream.writeLong(item);
-        }
-    }
-}

vanilla-codec/build.gradle

@@ -0,0 +1,3 @@
+dependencies {
+    compile project(':nbt')
+}

vanilla-codec/gradle.properties

@@ -0,0 +1,2 @@
+projectGroup=mc-project.nbt.codec
+projectName=nbt-vanilla-codec

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/Codec.java

@@ -0,0 +1,13 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.Tag;
+
+import java.io.IOException;
+
+public interface Codec<T extends Tag> {
+
+    T decode(NbtInputStream in) throws IOException;
+    void encode(T tag, NbtOutputStream out) throws IOException;
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/CodecEnum.java

@@ -0,0 +1,36 @@
+package mc.nbt.codec.vanilla;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import mc.nbt.TypeTag;
+
+import java.util.stream.Stream;
+
+@RequiredArgsConstructor
+@Getter
+public enum CodecEnum {
+
+    END(TypeTag.END, new TagEndCodec()),
+    BYTE(TypeTag.BYTE, new TagByteCodec()),
+    SHORT(TypeTag.SHORT, new TagShortCodec()),
+    INT(TypeTag.INT, new TagIntCodec()),
+    LONG(TypeTag.LONG, new TagLongCodec()),
+    FLOAT(TypeTag.FLOAT, new TagFloatCodec()),
+    DOUBLE(TypeTag.DOUBLE, new TagDoubleCodec()),
+    BYTE_ARRAY(TypeTag.BYTE_ARRAY, new TagByteArrayCodec()),
+    STRING(TypeTag.STRING, new TagStringCodec()),
+    LIST(TypeTag.LIST, new TagListCodec()),
+    COMPOUND(TypeTag.COMPOUND, new TagCompoundCodec()),
+    INT_ARRAY(TypeTag.INT_ARRAY, new TagIntArrayCodec()),
+    LONG_ARRAY(TypeTag.LONG_ARRAY, new TagLongArrayCodec());
+
+    public static CodecEnum valueOfTypeTag(TypeTag typeTag) {
+        return Stream.of(CodecEnum.values())
+                .filter(codecEnum -> codecEnum.getTypeTag() == typeTag)
+                .findFirst()
+                .orElseThrow(() -> new RuntimeException("Codec for " + typeTag.name() + " not found"));
+    }
+
+    private final TypeTag typeTag;
+    private final Codec codec;
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagByteArrayCodec.java

@@ -0,0 +1,23 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagByteArray;
+
+import java.io.IOException;
+
+class TagByteArrayCodec implements Codec<TagByteArray> {
+
+    @Override
+    public TagByteArray decode(NbtInputStream in) throws IOException {
+        byte[] value = new byte[in.readInt()];
+        in.read(value);
+        return new TagByteArray(value);
+    }
+
+    @Override
+    public void encode(TagByteArray tag, NbtOutputStream out) throws IOException {
+        out.writeInt(tag.getValue().length);
+        out.write(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagByteCodec.java

@@ -0,0 +1,20 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagByte;
+
+import java.io.IOException;
+
+class TagByteCodec implements Codec<TagByte> {
+
+    @Override
+    public TagByte decode(NbtInputStream in) throws IOException {
+        return new TagByte(in.readByte());
+    }
+
+    @Override
+    public void encode(TagByte tag, NbtOutputStream out) throws IOException {
+        out.writeByte(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagCompoundCodec.java

@@ -0,0 +1,42 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.TypeTag;
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.Tag;
+import mc.nbt.tag.TagCompound;
+import mc.nbt.tag.TagEnd;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+class TagCompoundCodec implements Codec<TagCompound> {
+
+    @Override
+    public TagCompound decode(NbtInputStream in) throws IOException {
+        List<Tag> tagList = new ArrayList<>();
+
+        while (true) {
+            Tag tag = in.readTag();
+            if (tag.getType() == TypeTag.END) {
+                break;
+            }
+
+            tagList.add(tag);
+        }
+
+        TagCompound tagCompound = new TagCompound();
+        tagCompound.setValue(tagList);
+        return tagCompound;
+    }
+
+    @Override
+    public void encode(TagCompound tag, NbtOutputStream out) throws IOException {
+        for (Tag itemTag : tag.getValue()) {
+            out.writeTag(itemTag);
+        }
+
+        out.writeTag(TagEnd.INSTANCE);
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagDoubleCodec.java

@@ -0,0 +1,20 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagDouble;
+
+import java.io.IOException;
+
+public class TagDoubleCodec implements Codec<TagDouble> {
+
+    @Override
+    public TagDouble decode(NbtInputStream in) throws IOException {
+        return new TagDouble(in.readDouble());
+    }
+
+    @Override
+    public void encode(TagDouble tag, NbtOutputStream out) throws IOException {
+        out.writeDouble(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagEndCodec.java

@@ -0,0 +1,18 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagEnd;
+
+class TagEndCodec implements Codec<TagEnd> {
+
+    @Override
+    public TagEnd decode(NbtInputStream in) {
+        return TagEnd.INSTANCE;
+    }
+
+    @Override
+    public void encode(TagEnd tag, NbtOutputStream out) {
+        //nothing
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagFloatCodec.java

@@ -0,0 +1,20 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagFloat;
+
+import java.io.IOException;
+
+public class TagFloatCodec implements Codec<TagFloat> {
+
+    @Override
+    public TagFloat decode(NbtInputStream in) throws IOException {
+        return new TagFloat(in.readFloat());
+    }
+
+    @Override
+    public void encode(TagFloat tag, NbtOutputStream out) throws IOException {
+        out.writeFloat(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagIntArrayCodec.java

@@ -0,0 +1,29 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagIntArray;
+
+import java.io.IOException;
+
+public class TagIntArrayCodec implements Codec<TagIntArray> {
+
+    @Override
+    public TagIntArray decode(NbtInputStream in) throws IOException {
+        final int[] value = new int[in.readInt()];
+
+        for (int i = 0; i < value.length; i++) {
+            value[i] = in.readInt();
+        }
+
+        return new TagIntArray(value);
+    }
+
+    @Override
+    public void encode(TagIntArray tag, NbtOutputStream out) throws IOException {
+        out.writeInt(tag.getValue().length);
+        for (int item : tag.getValue()) {
+            out.writeInt(item);
+        }
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagIntCodec.java

@@ -0,0 +1,20 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagInt;
+
+import java.io.IOException;
+
+class TagIntCodec implements Codec<TagInt> {
+
+    @Override
+    public TagInt decode(NbtInputStream in) throws IOException {
+        return new TagInt(in.readInt());
+    }
+
+    @Override
+    public void encode(TagInt tag, NbtOutputStream out) throws IOException {
+        out.writeInt(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagListCodec.java

@@ -0,0 +1,46 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.TypeTag;
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.Tag;
+import mc.nbt.tag.TagList;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class TagListCodec implements Codec<TagList> {
+
+    @Override
+    public TagList decode(NbtInputStream in) throws IOException {
+        final Codec typeCodec = CodecEnum.valueOfTypeTag(TypeTag.valueOfTypeId(in.readByte())).getCodec();
+        final int size = in.readInt();
+
+        List<Tag> tagList;
+        if (size > 0) {
+            tagList = new ArrayList<>(size);
+
+            for (int i = 0; i < size; i++) {
+                tagList.add(typeCodec.decode(in));
+            }
+        } else {
+            tagList = Collections.emptyList();
+        }
+
+        return new TagList(tagList);
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public void encode(TagList tag, NbtOutputStream out) throws IOException {
+        out.writeByte(tag.getTypeList().getId());
+        out.writeInt(tag.getValue().size());
+
+        final Codec typeCodec = CodecEnum.valueOfTypeTag(tag.getTypeList()).getCodec();
+        for (Tag item : tag.getValue()) {
+            typeCodec.encode(item, out);
+        }
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagLongArrayCodec.java

@@ -0,0 +1,29 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagLongArray;
+
+import java.io.IOException;
+
+public class TagLongArrayCodec implements Codec<TagLongArray> {
+
+    @Override
+    public TagLongArray decode(NbtInputStream in) throws IOException {
+        final long[] value = new long[in.readInt()];
+
+        for (int i = 0; i < value.length; i++) {
+            value[i] = in.readLong();
+        }
+
+        return new TagLongArray(value);
+    }
+
+    @Override
+    public void encode(TagLongArray tag, NbtOutputStream out) throws IOException {
+        out.writeInt(tag.getValue().length);
+        for (long item : tag.getValue()) {
+            out.writeLong(item);
+        }
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagLongCodec.java

@@ -0,0 +1,21 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagLong;
+
+import java.io.IOException;
+
+public class TagLongCodec implements Codec<TagLong> {
+
+    @Override
+    public TagLong decode(NbtInputStream in) throws IOException {
+        long value = in.readLong();
+        return new TagLong(value);
+    }
+
+    @Override
+    public void encode(TagLong tag, NbtOutputStream out) throws IOException {
+        out.writeLong(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagShortCodec.java

@@ -0,0 +1,20 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagShort;
+
+import java.io.IOException;
+
+class TagShortCodec implements Codec<TagShort> {
+
+    @Override
+    public TagShort decode(NbtInputStream in) throws IOException {
+        return new TagShort(in.readShort());
+    }
+
+    @Override
+    public void encode(TagShort tag, NbtOutputStream out) throws IOException {
+        out.writeShort(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/TagStringCodec.java

@@ -0,0 +1,20 @@
+package mc.nbt.codec.vanilla;
+
+import mc.nbt.codec.vanilla.io.NbtInputStream;
+import mc.nbt.codec.vanilla.io.NbtOutputStream;
+import mc.nbt.tag.TagString;
+
+import java.io.IOException;
+
+public class TagStringCodec implements Codec<TagString> {
+
+    @Override
+    public TagString decode(NbtInputStream in) throws IOException {
+        return new TagString(in.readString());
+    }
+
+    @Override
+    public void encode(TagString tag, NbtOutputStream out) throws IOException {
+        out.writeString(tag.getValue());
+    }
+}

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/io/NbtInputStream.java

@@ -1,7 +1,10 @@
-package mc.nbt.io;
+package mc.nbt.codec.vanilla.io;
 
 import mc.nbt.TypeTag;
+import mc.nbt.codec.vanilla.Codec;
+import mc.nbt.codec.vanilla.CodecEnum;
 import mc.nbt.tag.Tag;
+import mc.nbt.tag.TagEnd;
 
 import java.io.DataInputStream;
 import java.io.IOException;
@@ -24,23 +27,20 @@ public class NbtInputStream extends InputStream {
         this(inputStream, false);
     }
 
-    public Tag readTag() {
+    public Tag readTag() throws IOException {
-        Tag tag = null;
+        final TypeTag typeTag = TypeTag.valueOfTypeId(read());
-
+        if (typeTag == TypeTag.END) {
-        try {
+            return TagEnd.INSTANCE;
-            tag = TypeTag.getTagById(read());
+        } else {
-            if (tag.getType() != TypeTag.END) {
+            final CodecEnum codecEnum = CodecEnum.valueOfTypeTag(typeTag);
-                tag.setName(readString());
+            final Codec codec = codecEnum.getCodec();
-            }
+            final String name = readString();
-
+            final Tag tag = codec.decode(this);
-            tag.readSelf(this);
-
-        } catch (IOException e) {
-            e.printStackTrace(); //FIXME
-        }
 
+            tag.setName(name);
             return tag;
         }
+    }
 
     public byte readByte() throws IOException {
         return dataInputStream.readByte();

vanilla-codec/src/main/java/mc/nbt/codec/vanilla/io/NbtOutputStream.java

@@ -1,5 +1,8 @@
-package mc.nbt.io;
+package mc.nbt.codec.vanilla.io;
 
+import mc.nbt.TypeTag;
+import mc.nbt.codec.vanilla.Codec;
+import mc.nbt.codec.vanilla.CodecEnum;
 import mc.nbt.tag.Tag;
 
 import java.io.DataOutputStream;
@@ -23,10 +26,16 @@ public class NbtOutputStream extends OutputStream {
         this(outputStream, false);
     }
 
+    @SuppressWarnings("unchecked")
     public void writeTag(Tag tag) throws IOException {
-        writeByte(tag.getType().getId());
+        final TypeTag typeTag = tag.getType();
+        final CodecEnum codecEnum = CodecEnum.valueOfTypeTag(typeTag);
+        final Codec codec = codecEnum.getCodec();
+
+        writeByte(typeTag.getId());
         writeString(tag.getName());
-        tag.writeSelf(this);
+
+        codec.encode(tag, this);
     }
 
     public void writeByte(int value) throws IOException {

vanilla-codec/src/test/java/mc/nbt/codec/vanilla/io/NbtInputStreamTest.java

@@ -1,4 +1,4 @@
-package mc.nbt.io;
+package mc.nbt.codec.vanilla.io;
 
 import mc.nbt.TypeTag;
 import mc.nbt.tag.*;

vanilla-codec/src/test/java/mc/nbt/codec/vanilla/io/NbtOutputStreamCompressedTest.java

@@ -1,4 +1,4 @@
-package mc.nbt.io;
+package mc.nbt.codec.vanilla.io;
 
 import mc.nbt.TypeTag;
 import mc.nbt.tag.Tag;

vanilla-codec/src/test/java/mc/nbt/codec/vanilla/io/NbtOutputStreamTest.java

@@ -1,4 +1,4 @@
-package mc.nbt.io;
+package mc.nbt.codec.vanilla.io;
 
 import mc.nbt.TypeTag;
 import mc.nbt.tag.*;
@@ -32,7 +32,7 @@ class NbtOutputStreamTest {
 
     @Test
     void testWriteTagEnd() throws IOException {
-        nbtOutputStream.writeTag(new TagEnd());
+        nbtOutputStream.writeTag(TagEnd.INSTANCE);
 
         Tag tag = createNbtInputStream().readTag();
         assertEquals(TypeTag.END, tag.getType());
@@ -201,10 +201,11 @@ class NbtOutputStreamTest {
 
     private static Stream<Arguments> streamOfTagList() {
         final List<Tag> value = new ArrayList<>();
-        value.add(new TagLong("TestName", RandomUtils.nextLong()));
+//        value.add(new TagLong("TestName", RandomUtils.nextLong()));
-        value.add(new TagLong(RandomUtils.nextLong()));
+//        value.add(new TagLong(RandomUtils.nextLong()));
-        value.add(new TagLong(RandomUtils.nextLong()));
+//        value.add(new TagLong(RandomUtils.nextLong()));
-        value.add(new TagLong(RandomUtils.nextLong()));
+//        value.add(new TagLong(RandomUtils.nextLong()));
+        value.add(new TagLong(1L));
 
         return Stream.of(
                 Arguments.of(new TagList(value)),