first commit

.gitignore

@@ -0,0 +1,40 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+.gradle
+build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+
+# End of https://mrkandreev.name/snippets/gitignore-generator/#Java,Gradle

README.md

@@ -0,0 +1,25 @@
+# Full Example Plugin
+
+Standalone example plugin that uses the Database API.
+
+## Build
+
+1. Publish Database plugin to local Maven:
+
+```powershell
+./gradlew publishToMavenLocal
+```
+
+2. Build this example:
+
+```powershell
+./gradlew build
+```
+
+3. Drop the jar into your server `plugins` folder.
+
+## Notes
+
+- This plugin depends on the `Database` plugin at runtime.
+- Check `plugin.yml` for `depend: [ Database ]`.
+- For full coverage, toggle `RUN_ADVANCED` (JOIN/GROUP BY/HAVING) and `RUN_DESTRUCTIVE` (create/drop database and demo tables) in `examples/FullPlugin/src/main/java/com/andrewkydev/example/full/run/ExampleCoordinator.java`.

build.gradle.kts

@@ -0,0 +1,27 @@
+plugins {
+    id("java")
+}
+
+group = "com.andrewkydev"
+version = "0.0.1"
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+
+    maven {
+        name = "luminiadevRepositorySnapshots"
+        url = uri("https://repo.luminiadev.com/snapshots")
+    }
+}
+
+dependencies {
+    compileOnly("com.koshakmine:Lumi:1.4.0-SNAPSHOT")
+    compileOnly("com.andrewkydev:Database:1.0-SNAPSHOT")
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(17))
+    }
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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
+#
+#      https://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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# 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"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,94 @@
+@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      https://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
+@rem SPDX-License-Identifier: Apache-2.0
+@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=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@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% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 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!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

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+rootProject.name = "DatabaseFullExample"

src/main/java/com/andrewkydev/example/ExamplePlugin.java

@@ -0,0 +1,12 @@
+package com.andrewkydev.example;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.example.run.ExampleCoordinator;
+
+public class ExamplePlugin extends PluginBase {
+
+    @Override
+    public void onEnable() {
+        ExampleCoordinator.run(this);
+    }
+}

src/main/java/com/andrewkydev/example/examples/AsyncExamples.java

@@ -0,0 +1,122 @@
+package com.andrewkydev.example.examples;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.DatabaseApi;
+import com.andrewkydev.database.query.RowMapper;
+import com.andrewkydev.example.model.PlayerModel;
+
+import java.util.Collections;
+import java.util.UUID;
+
+public final class AsyncExamples {
+    private AsyncExamples() {
+    }
+
+    public static void run(PluginBase plugin, DatabaseApi api) {
+        api.query().executeAsync("UPDATE players SET level = level")
+                .thenAccept(rows -> plugin.getLogger().info("Async update all rows: " + rows));
+
+        api.query().executeAsync(
+                        "UPDATE players SET level = level + 1 WHERE username = ?",
+                        Collections.singletonList("Steve")
+                )
+                .thenAccept(rows -> plugin.getLogger().info("Async update rows: " + rows));
+
+        api.orm().findAllAsync(PlayerModel.class)
+                .thenAccept(players -> plugin.getLogger().info("Async players: " + players.size()));
+
+        api.orm().findByIdAsync(PlayerModel.class, 1L)
+                .thenAccept(player -> plugin.getLogger().info("Async findById: " + (player == null ? "null" : player.getUsername())));
+
+        api.orm().findWhereAsync(PlayerModel.class, "level >= ?", Collections.singletonList(1))
+                .thenAccept(players -> plugin.getLogger().info("Async findWhere: " + players.size()));
+
+        api.orm().findOneWhereAsync(PlayerModel.class, "username = ?", Collections.singletonList("Steve"))
+                .thenAccept(player -> plugin.getLogger().info("Async findOneWhere: " + (player == null ? "null" : player.getUsername())));
+
+        api.orm().findWhereAsync(
+                        PlayerModel.class,
+                        "level >= ?",
+                        Collections.singletonList(1),
+                        "level DESC",
+                        5,
+                        0
+                )
+                .thenAccept(players -> plugin.getLogger().info("Async findWhere paged: " + players.size()));
+
+        api.orm().countAsync(PlayerModel.class)
+                .thenAccept(count -> plugin.getLogger().info("Async count: " + count));
+
+        api.orm().existsAsync(PlayerModel.class, "username = ?", Collections.singletonList("Steve"))
+                .thenAccept(exists -> plugin.getLogger().info("Async exists: " + exists));
+
+        PlayerModel asyncPlayer = new PlayerModel();
+        asyncPlayer.setUsername("AsyncUser_" + UUID.randomUUID().toString().substring(0, 8));
+        asyncPlayer.setLevel(1);
+        api.orm().insertAsync(asyncPlayer)
+                .thenCompose(v -> api.orm().updateAsync(asyncPlayer))
+                .thenCompose(v -> api.orm().deleteAsync(asyncPlayer))
+                .thenRun(() -> plugin.getLogger().info("Async insert/update/delete ok"));
+
+        api.orm().deleteWhereAsync(PlayerModel.class, "level < ?", Collections.singletonList(0))
+                .thenAccept(rows -> plugin.getLogger().info("Async deleteWhere: " + rows));
+
+        api.query().queryAsync(
+                        "SELECT username FROM players",
+                        rs -> rs.getString("username")
+                )
+                .thenAccept(names -> plugin.getLogger().info("Async query names: " + names.size()));
+
+        api.query().queryAsync(
+                        "SELECT username FROM players WHERE level >= ?",
+                        Collections.singletonList(1),
+                        rs -> rs.getString("username")
+                )
+                .thenAccept(names -> plugin.getLogger().info("Async query names (params): " + names.size()));
+
+        api.schema().addColumnAsync(
+                        "players",
+                        com.andrewkydev.database.schema.ColumnSpec.builder("nickname", "VARCHAR(32)").nullable(true).build()
+                )
+                .thenRun(() -> plugin.getLogger().info("Async add column done"))
+                .exceptionally(ex -> {
+                    plugin.getLogger().warning("Async add column failed: " + ex.getMessage());
+                    return null;
+                });
+
+        api.beginTransactionAsync().thenAccept(tx -> {
+            tx.execute("UPDATE players SET level = level + 1 WHERE username = ?", Collections.singletonList("Steve"));
+            tx.commitAsync().thenRun(tx::close);
+        });
+
+        api.beginTransactionAsync().thenAccept(tx -> {
+            tx.execute("UPDATE players SET level = level + 1 WHERE username = ?", Collections.singletonList("Alex"));
+            tx.rollbackAsync().thenRun(tx::close);
+        });
+
+        api.orm().query(PlayerModel.class)
+                .where("level >= ?", 1)
+                .listAsync()
+                .thenAccept(players -> plugin.getLogger().info("Async query builder list: " + players.size()));
+
+        api.orm().query(PlayerModel.class)
+                .where("username = ?", "Steve")
+                .oneAsync()
+                .thenAccept(player -> plugin.getLogger().info("Async query builder one: " + (player == null ? "null" : player.getUsername())));
+
+        api.orm().query(PlayerModel.class)
+                .where("level >= ?", 1)
+                .countAsync()
+                .thenAccept(count -> plugin.getLogger().info("Async query builder count: " + count));
+
+        api.orm().query(PlayerModel.class)
+                .where("username = ?", "Steve")
+                .existsAsync()
+                .thenAccept(exists -> plugin.getLogger().info("Async query builder exists: " + exists));
+
+        api.orm().query(PlayerModel.class)
+                .where("level < ?", 0)
+                .deleteAsync()
+                .thenAccept(rows -> plugin.getLogger().info("Async query builder delete: " + rows));
+    }
+}

src/main/java/com/andrewkydev/example/examples/OrmExamples.java

@@ -0,0 +1,88 @@
+package com.andrewkydev.example.examples;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.orm.Conditions;
+import com.andrewkydev.database.orm.EntityManager;
+import com.andrewkydev.example.model.PlayerModel;
+
+import java.util.Collections;
+import java.util.List;
+
+public final class OrmExamples {
+    private OrmExamples() {
+    }
+
+    public static void run(PluginBase plugin, EntityManager orm) {
+        List<PlayerModel> all = orm.findAll(PlayerModel.class);
+        plugin.getLogger().info("All players: " + all.size());
+
+        PlayerModel byId = orm.findById(PlayerModel.class, 1L);
+        plugin.getLogger().info("Find by id: " + (byId == null ? "null" : byId.getUsername()));
+
+        PlayerModel one = orm.findOneWhere(
+                PlayerModel.class,
+                "username = ?",
+                Collections.singletonList("Steve")
+        );
+        plugin.getLogger().info("Find one: " + (one == null ? "null" : one.getUsername()));
+
+        List<PlayerModel> paged = orm.findWhere(
+                PlayerModel.class,
+                "level >= ?",
+                Collections.singletonList(1),
+                "level DESC",
+                5,
+                0
+        );
+        plugin.getLogger().info("Paged players: " + paged.size());
+
+        long count = orm.count(PlayerModel.class, "level >= ?", Collections.singletonList(1));
+        long total = orm.count(PlayerModel.class);
+        boolean exists = orm.exists(PlayerModel.class, "username = ?", Collections.singletonList("Steve"));
+        plugin.getLogger().info("Count >= 1: " + count + ", Total: " + total + ", Steve exists: " + exists);
+
+        List<PlayerModel> byCondition = orm.query(PlayerModel.class)
+                .where(Conditions.eq("level", 10).or(Conditions.gt("level", 1)))
+                .list();
+        plugin.getLogger().info("Condition list: " + byCondition.size());
+
+        List<PlayerModel> byChainedCondition = orm.query(PlayerModel.class)
+                .where(Conditions.eq("level", 1))
+                .and(Conditions.like("username", "S%"))
+                .list();
+        plugin.getLogger().info("Chained condition list: " + byChainedCondition.size());
+
+        List<PlayerModel> top = orm.query(PlayerModel.class)
+                .where("level >= ?", 1)
+                .orderBy("level DESC")
+                .limit(10)
+                .list();
+        plugin.getLogger().info("Top players: " + top.size());
+
+        int deleted = orm.deleteWhere(PlayerModel.class, "level < ?", Collections.singletonList(0));
+        plugin.getLogger().info("Deleted low level players: " + deleted);
+
+        PlayerModel temp = new PlayerModel();
+        temp.setUsername("TempUser");
+        temp.setLevel(1);
+        orm.insert(temp);
+        temp.setLevel(2);
+        orm.update(temp);
+        orm.delete(temp);
+
+        PlayerModel fromQuery = orm.query(PlayerModel.class)
+                .where("username = ?", "Steve")
+                .one();
+        plugin.getLogger().info("Query one: " + (fromQuery == null ? "null" : fromQuery.getUsername()));
+
+        boolean queryExists = orm.query(PlayerModel.class)
+                .where(Conditions.in("username", "Steve", "Alex"))
+                .exists();
+        plugin.getLogger().info("Query exists: " + queryExists);
+
+        int queryDeleted = orm.query(PlayerModel.class)
+                .where("level < ?", 0)
+                .delete();
+        plugin.getLogger().info("Query delete: " + queryDeleted);
+    }
+}

src/main/java/com/andrewkydev/example/examples/QueryBuilderExamples.java

@@ -0,0 +1,31 @@
+package com.andrewkydev.example.examples;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.orm.Conditions;
+import com.andrewkydev.database.orm.EntityManager;
+import com.andrewkydev.example.model.PlayerModel;
+
+import java.util.List;
+
+public final class QueryBuilderExamples {
+    private QueryBuilderExamples() {
+    }
+
+    public static void run(PluginBase plugin, EntityManager orm) {
+        List<PlayerModel> joined = orm.query(PlayerModel.class)
+                .select("players.*")
+                .join("LEFT JOIN clans ON clans.id = players.clan_id")
+                .where(Conditions.like("players.username", "S%"))
+                .groupBy("players.id")
+                .having("COUNT(clans.id) >= ?", 1)
+                .orderBy("players.level DESC")
+                .limit(10, 0)
+                .list();
+        plugin.getLogger().info("Joined rows: " + joined.size());
+
+        long count = orm.query(PlayerModel.class)
+                .where(Conditions.in("players.username", "Steve", "Alex"))
+                .count();
+        plugin.getLogger().info("IN count: " + count);
+    }
+}

src/main/java/com/andrewkydev/example/examples/QueryExamples.java

@@ -0,0 +1,35 @@
+package com.andrewkydev.example.examples;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.query.QueryRunner;
+import com.andrewkydev.database.query.RowMapper;
+
+import java.util.Collections;
+import java.util.List;
+
+public final class QueryExamples {
+    private QueryExamples() {
+    }
+
+    public static void run(PluginBase plugin, QueryRunner query) {
+        query.execute("UPDATE players SET level = level");
+        int updated = query.execute(
+                "UPDATE players SET level = level + 1 WHERE username = ?",
+                Collections.singletonList("Steve")
+        );
+        plugin.getLogger().info("Rows updated: " + updated);
+
+        List<String> names = query.query(
+                "SELECT username FROM players WHERE level >= ?",
+                Collections.singletonList(1),
+                rs -> rs.getString("username")
+        );
+        plugin.getLogger().info("Names size: " + names.size());
+
+        List<Integer> levels = query.query(
+                "SELECT level FROM players",
+                rs -> rs.getInt("level")
+        );
+        plugin.getLogger().info("Levels size: " + levels.size());
+    }
+}

src/main/java/com/andrewkydev/example/examples/SchemaExamples.java

@@ -0,0 +1,59 @@
+package com.andrewkydev.example.examples;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.DatabaseApi;
+import com.andrewkydev.database.orm.OrmSchema;
+import com.andrewkydev.database.schema.ColumnSpec;
+import com.andrewkydev.database.schema.IndexSpec;
+import com.andrewkydev.database.schema.SqlDialect;
+import com.andrewkydev.database.schema.TableSpec;
+import com.andrewkydev.example.model.PlayerModel;
+
+import java.util.Collections;
+
+public final class SchemaExamples {
+    private SchemaExamples() {
+    }
+
+    public static void setup(PluginBase plugin, DatabaseApi api) {
+        TableSpec spec = OrmSchema.fromEntity(PlayerModel.class, SqlDialect.MYSQL);
+        try {
+            api.schema().createTable(spec);
+        } catch (Exception ex) {
+            plugin.getLogger().warning("Table create failed (might already exist): " + ex.getMessage());
+        }
+    }
+
+    public static void runDestructive(PluginBase plugin, DatabaseApi api) {
+        api.schema().createDatabase("lumi_demo");
+        api.schema().dropDatabase("lumi_demo");
+
+        api.schema().createDatabaseAsync("lumi_demo_async")
+                .thenRun(() -> api.schema().dropDatabaseAsync("lumi_demo_async"));
+
+        TableSpec demo = TableSpec.builder("players_demo")
+                .column(ColumnSpec.builder("id", "BIGINT").primaryKey(true).autoIncrement(true).nullable(false).build())
+                .column(ColumnSpec.builder("username", "VARCHAR(32)").nullable(false).build())
+                .build();
+
+        api.schema().createTable(demo);
+        api.schema().addColumn("players_demo", ColumnSpec.builder("level", "INT").nullable(true).build());
+        api.schema().updateColumn("players_demo", ColumnSpec.builder("level", "INT").nullable(false).build());
+        api.schema().addIndex("players_demo", new IndexSpec("players_demo_username_idx", Collections.singletonList("username"), false));
+        api.schema().dropIndex("players_demo", "players_demo_username_idx");
+        api.schema().dropColumn("players_demo", "level");
+        api.schema().dropTable("players_demo");
+
+        TableSpec demoAsync = TableSpec.builder("players_demo_async")
+                .column(ColumnSpec.builder("id", "BIGINT").primaryKey(true).autoIncrement(true).nullable(false).build())
+                .column(ColumnSpec.builder("username", "VARCHAR(32)").nullable(false).build())
+                .build();
+
+        api.schema().createTableAsync(demoAsync)
+                .thenCompose(v -> api.schema().dropTableAsync("players_demo_async"))
+                .exceptionally(ex -> {
+                    plugin.getLogger().warning("Async schema failed: " + ex.getMessage());
+                    return null;
+                });
+    }
+}

src/main/java/com/andrewkydev/example/examples/SeedData.java

@@ -0,0 +1,35 @@
+package com.andrewkydev.example.examples;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.orm.EntityManager;
+import com.andrewkydev.example.model.PlayerModel;
+
+import java.util.Collections;
+
+public final class SeedData {
+    private SeedData() {
+    }
+
+    public static void seed(PluginBase plugin, EntityManager orm) {
+        PlayerModel player = orm.findOneWhere(
+                PlayerModel.class,
+                "username = ?",
+                Collections.singletonList("Steve")
+        );
+        if (player != null) {
+            return;
+        }
+
+        PlayerModel steve = new PlayerModel();
+        steve.setUsername("Steve");
+        steve.setLevel(10);
+        orm.insert(steve);
+
+        PlayerModel alex = new PlayerModel();
+        alex.setUsername("Alex");
+        alex.setLevel(5);
+        orm.insert(alex);
+
+        plugin.getLogger().info("Seeded demo players");
+    }
+}

src/main/java/com/andrewkydev/example/examples/TransactionExamples.java

@@ -0,0 +1,44 @@
+package com.andrewkydev.example.examples;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.DatabaseApi;
+import com.andrewkydev.database.query.RowMapper;
+import com.andrewkydev.database.query.Transaction;
+
+import java.util.Collections;
+import java.util.List;
+
+public final class TransactionExamples {
+    private TransactionExamples() {
+    }
+
+    public static void run(PluginBase plugin, DatabaseApi api) {
+        try (Transaction tx = api.beginTransaction()) {
+            tx.execute(
+                    "UPDATE players SET level = level + 1 WHERE username = ?",
+                    Collections.singletonList("Alex")
+            );
+            List<String> names = tx.query(
+                    "SELECT username FROM players WHERE level >= ?",
+                    Collections.singletonList(1),
+                    rs -> rs.getString("username")
+            );
+            plugin.getLogger().info("Tx names: " + names.size());
+            tx.commit();
+            plugin.getLogger().info("Transaction committed");
+        } catch (Exception ex) {
+            plugin.getLogger().warning("Transaction failed: " + ex.getMessage());
+        }
+
+        try (Transaction tx = api.beginTransaction()) {
+            tx.execute(
+                    "UPDATE players SET level = level + 1 WHERE username = ?",
+                    Collections.singletonList("Steve")
+            );
+            tx.rollback();
+            plugin.getLogger().info("Transaction rolled back");
+        } catch (Exception ex) {
+            plugin.getLogger().warning("Rollback failed: " + ex.getMessage());
+        }
+    }
+}

src/main/java/com/andrewkydev/example/model/PlayerModel.java

@@ -0,0 +1,77 @@
+package com.andrewkydev.example.model;
+
+import com.andrewkydev.database.orm.DbColumn;
+import com.andrewkydev.database.orm.DbEntity;
+import com.andrewkydev.database.orm.DbId;
+import com.andrewkydev.database.orm.DbJson;
+
+import java.util.Map;
+import java.util.UUID;
+
+@DbEntity(table = "players")
+public class PlayerModel {
+    @DbId(autoIncrement = true)
+    private long id;
+
+    @DbColumn(nullable = false, unique = true, length = 32)
+    private String username;
+
+    @DbColumn(nullable = false)
+    private int level;
+
+    @DbColumn(type = "VARCHAR(16)")
+    private Rank rank = Rank.MEMBER;
+
+    @DbColumn(type = "CHAR(36)")
+    private UUID externalId = UUID.randomUUID();
+
+    @DbJson
+    private Map<String, Object> metadata;
+
+    public PlayerModel() {
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public int getLevel() {
+        return level;
+    }
+
+    public void setLevel(int level) {
+        this.level = level;
+    }
+
+    public Rank getRank() {
+        return rank;
+    }
+
+    public void setRank(Rank rank) {
+        this.rank = rank;
+    }
+
+    public UUID getExternalId() {
+        return externalId;
+    }
+
+    public void setExternalId(UUID externalId) {
+        this.externalId = externalId;
+    }
+
+    public Map<String, Object> getMetadata() {
+        return metadata;
+    }
+
+    public void setMetadata(Map<String, Object> metadata) {
+        this.metadata = metadata;
+    }
+}

src/main/java/com/andrewkydev/example/model/Rank.java

@@ -0,0 +1,6 @@
+package com.andrewkydev.example.model;
+
+public enum Rank {
+    MEMBER,
+    VIP
+}

src/main/java/com/andrewkydev/example/orm/AdapterRegistrar.java

@@ -0,0 +1,27 @@
+package com.andrewkydev.example.orm;
+
+import com.andrewkydev.database.orm.EntityManager;
+import com.andrewkydev.database.orm.TypeAdapter;
+import com.andrewkydev.example.model.Rank;
+
+public final class AdapterRegistrar {
+    private AdapterRegistrar() {
+    }
+
+    public static void register(EntityManager orm) {
+        orm.registerAdapter(Rank.class, new TypeAdapter<Rank>() {
+            @Override
+            public Object toDatabase(Rank value) {
+                return value == null ? null : value.name();
+            }
+
+            @Override
+            public Rank fromDatabase(Object value) {
+                if (value == null) {
+                    return null;
+                }
+                return Rank.valueOf(value.toString());
+            }
+        });
+    }
+}

src/main/java/com/andrewkydev/example/run/ExampleCoordinator.java

@@ -0,0 +1,36 @@
+package com.andrewkydev.example.run;
+
+import cn.nukkit.plugin.PluginBase;
+import com.andrewkydev.database.DatabaseApi;
+import com.andrewkydev.database.DatabaseProvider;
+import com.andrewkydev.database.orm.EntityManager;
+import com.andrewkydev.example.examples.*;
+import com.andrewkydev.example.orm.AdapterRegistrar;
+
+public final class ExampleCoordinator {
+    private static final boolean RUN_DESTRUCTIVE = false;
+    private static final boolean RUN_ADVANCED = false;
+
+    private ExampleCoordinator() {
+    }
+
+    public static void run(PluginBase plugin) {
+        DatabaseApi api = DatabaseProvider.get();
+        EntityManager orm = api.orm();
+        AdapterRegistrar.register(orm);
+
+        SchemaExamples.setup(plugin, api);
+        SeedData.seed(plugin, orm);
+
+        OrmExamples.run(plugin, orm);
+        QueryExamples.run(plugin, api.query());
+        TransactionExamples.run(plugin, api);
+        AsyncExamples.run(plugin, api);
+        if (RUN_ADVANCED) {
+            QueryBuilderExamples.run(plugin, orm);
+        }
+        if (RUN_DESTRUCTIVE) {
+            SchemaExamples.runDestructive(plugin, api);
+        }
+    }
+}

src/main/resources/plugin.yml

@@ -0,0 +1,6 @@
+name: DatabaseFullExample
+description: "Full example plugin using Database API"
+main: com.andrewkydev.example.full.ExamplePlugin
+version: "0.0.1"
+api: [ 1.1.0 ]
+depend: [ Database ]