Provider Extraction + priority to Providers:

Implemented methods for extracting each kind of Provider annotation
related method information to a DataProvider.

DataProviders required some duplicate code due to type erasure of the
parameter class.

----

Added Display-priority to Providers, highest value is placed top most.

InvalidateMethod annotations are now extracted.

Plan/api/src/main/java/com/djrapitops/plan/extension/annotation/BooleanProvider.java

@@ -53,6 +53,15 @@ public @interface BooleanProvider {
      */
     String text();
 
+    /**
+     * Display-priority of the value, highest value is placed top most.
+     * <p>
+     * Two values with same priority may appear in a random order.
+     *
+     * @return Priority between 0 and {@code Integer.MAX_VALUE}.
+     */
+    int priority() default 0;
+
     /**
      * Text displayed when hovering over the value, limited to 150 characters.
      * <p>
@@ -96,5 +105,4 @@ public @interface BooleanProvider {
      * @return Preferred color. If none are specified defaults are used.
      */
     Color iconColor() default Color.NONE;
-
-}
+}

Plan/api/src/main/java/com/djrapitops/plan/extension/annotation/DoubleProvider.java

@@ -45,6 +45,15 @@ public @interface DoubleProvider {
      */
     String text();
 
+    /**
+     * Display-priority of the value, highest value is placed top most.
+     * <p>
+     * Two values with same priority may appear in a random order.
+     *
+     * @return Priority between 0 and {@code Integer.MAX_VALUE}.
+     */
+    int priority() default 0;
+
     /**
      * Text displayed when hovering over the value, limited to 150 characters.
      * <p>

Plan/api/src/main/java/com/djrapitops/plan/extension/annotation/InvalidateMethod.java

@@ -1,3 +1,19 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
 package com.djrapitops.plan.extension.annotation;
 
 import java.lang.annotation.*;

Plan/api/src/main/java/com/djrapitops/plan/extension/annotation/NumberProvider.java

@@ -49,6 +49,15 @@ public @interface NumberProvider {
      */
     String text();
 
+    /**
+     * Display-priority of the value, highest value is placed top most.
+     * <p>
+     * Two values with same priority may appear in a random order.
+     *
+     * @return Priority between 0 and {@code Integer.MAX_VALUE}.
+     */
+    int priority() default 0;
+
     /**
      * Text displayed when hovering over the value, limited to 150 characters.
      * <p>

Plan/api/src/main/java/com/djrapitops/plan/extension/annotation/PercentageProvider.java

@@ -48,6 +48,15 @@ public @interface PercentageProvider {
      */
     String text();
 
+    /**
+     * Display-priority of the value, highest value is placed top most.
+     * <p>
+     * Two values with same priority may appear in a random order.
+     *
+     * @return Priority between 0 and {@code Integer.MAX_VALUE}.
+     */
+    int priority() default 0;
+
     /**
      * Text displayed when hovering over the value, limited to 150 characters.
      * <p>

Plan/api/src/main/java/com/djrapitops/plan/extension/annotation/StringProvider.java

@@ -50,6 +50,15 @@ public @interface StringProvider {
      */
     String text();
 
+    /**
+     * Display-priority of the value, highest value is placed top most.
+     * <p>
+     * Two values with same priority may appear in a random order.
+     *
+     * @return Priority between 0 and {@code Integer.MAX_VALUE}.
+     */
+    int priority() default 0;
+
     /**
      * Text displayed when hovering over the value, limited to 150 characters.
      * <p>

Plan/api/src/main/java/com/djrapitops/plan/extension/extractor/ExtensionExtractor.java

@@ -44,6 +44,7 @@ public final class ExtensionExtractor {
     private PluginInfo pluginInfo;
     private TabOrder tabOrder;
     private List<TabInfo> tabInformation;
+    private List<InvalidateMethod> invalidMethods;
     private MethodAnnotations methodAnnotations;
 
     public ExtensionExtractor(DataExtension extension) {
@@ -74,6 +75,7 @@ public final class ExtensionExtractor {
 
     public void extractAnnotationInformation() {
         extractPluginInfo();
+        extractInvalidMethods();
 
         extractMethodAnnotations();
         validateMethodAnnotations();
@@ -310,6 +312,22 @@ public final class ExtensionExtractor {
         }
     }
 
+    private void extractInvalidMethods() {
+        invalidMethods = new ArrayList<>();
+        getClassAnnotation(InvalidateMethod.Multiple.class).ifPresent(tabs -> {
+            for (InvalidateMethod tabInfo : tabs.value()) {
+                String methodName = tabInfo.value();
+
+                // Length restriction check
+                if (methodName.length() > 50) {
+                    warnings.add(extensionName + " invalidated method '" + methodName + "' was over 50 characters.");
+                }
+
+                invalidMethods.add(tabInfo);
+            }
+        });
+    }
+
     public List<String> getWarnings() {
         return warnings;
     }
@@ -323,10 +341,14 @@ public final class ExtensionExtractor {
     }
 
     public List<TabInfo> getTabInformation() {
-        return tabInformation;
+        return tabInformation != null ? tabInformation : Collections.emptyList();
     }
 
     public MethodAnnotations getMethodAnnotations() {
         return methodAnnotations;
     }
+
+    public List<InvalidateMethod> getInvalidateMethodAnnotations() {
+        return invalidMethods != null ? invalidMethods : Collections.emptyList();
+    }
 }

Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/DataProviderExtractor.java

@@ -17,14 +17,15 @@
 package com.djrapitops.plan.extension.implementation;
 
 import com.djrapitops.plan.extension.DataExtension;
-import com.djrapitops.plan.extension.annotation.PluginInfo;
-import com.djrapitops.plan.extension.annotation.Tab;
-import com.djrapitops.plan.extension.annotation.TabInfo;
-import com.djrapitops.plan.extension.annotation.TabOrder;
+import com.djrapitops.plan.extension.annotation.*;
 import com.djrapitops.plan.extension.extractor.ExtensionExtractor;
+import com.djrapitops.plan.extension.extractor.MethodAnnotations;
 import com.djrapitops.plan.extension.icon.Color;
 import com.djrapitops.plan.extension.icon.Icon;
+import com.djrapitops.plan.extension.implementation.providers.*;
 
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
 import java.util.Collection;
 import java.util.Map;
 import java.util.Optional;
@@ -40,8 +41,8 @@ import java.util.stream.Collectors;
  */
 public class DataProviderExtractor {
 
-    private final DataExtension extension;
     private ExtensionExtractor extensionExtractor;
+    private DataProviders dataProviders;
 
     /**
      * Create a DataProviderExtractor.
@@ -50,7 +51,6 @@ public class DataProviderExtractor {
      * @throws IllegalArgumentException If something is badly wrong with the specified extension class annotations.
      */
     public DataProviderExtractor(DataExtension extension) {
-        this.extension = extension;
         extensionExtractor = new ExtensionExtractor(extension);
 
         extensionExtractor.extractAnnotationInformation();
@@ -85,4 +85,61 @@ public class DataProviderExtractor {
     public Optional<String[]> getTabOrder() {
         return extensionExtractor.getTabOrder().map(TabOrder::value);
     }
+
+    public Collection<String> getInvalidatedMethods() {
+        return extensionExtractor.getInvalidateMethodAnnotations().stream()
+                .map(InvalidateMethod::value)
+                .collect(Collectors.toSet());
+    }
+
+    private Optional<Class> extractParameterClass(Method method) {
+        Class<?>[] parameterTypes = method.getParameterTypes();
+        return parameterTypes.length == 1 ? Optional.of(parameterTypes[0]) : Optional.empty();
+    }
+
+    public DataProviders getDataProviders() {
+        dataProviders = new DataProviders();
+
+        PluginInfo pluginInfo = extensionExtractor.getPluginInfo();
+        MethodAnnotations methodAnnotations = extensionExtractor.getMethodAnnotations();
+        Map<Method, Tab> tabs = methodAnnotations.getMethodAnnotations(Tab.class);
+        Map<Method, Conditional> conditions = methodAnnotations.getMethodAnnotations(Conditional.class);
+
+        extractDataProviders(pluginInfo, tabs, conditions, BooleanProvider.class, BooleanDataProvider::placeToDataProviders);
+        extractDataProviders(pluginInfo, tabs, conditions, DoubleProvider.class, DoubleDataProvider::placeToDataProviders);
+        extractDataProviders(pluginInfo, tabs, conditions, PercentageProvider.class, PercentageDataProvider::placeToDataProviders);
+        extractDataProviders(pluginInfo, tabs, conditions, NumberProvider.class, NumberDataProvider::placeToDataProviders);
+        extractDataProviders(pluginInfo, tabs, conditions, StringProvider.class, StringDataProvider::placeToDataProviders);
+
+        return dataProviders;
+    }
+
+    private <T extends Annotation> void extractDataProviders(PluginInfo pluginInfo, Map<Method, Tab> tabs, Map<Method, Conditional> conditions, Class<T> ofKind, DataProviderFactory<T> factory) {
+        for (Map.Entry<Method, T> entry : extensionExtractor.getMethodAnnotations().getMethodAnnotations(ofKind).entrySet()) {
+            Method method = entry.getKey();
+            T annotation = entry.getValue();
+            Optional<Conditional> conditional = Optional.ofNullable(conditions.get(method));
+            Optional<Tab> tab = Optional.ofNullable(tabs.get(method));
+            Optional<Class> parameterClass = extractParameterClass(method);
+
+            factory.placeToDataProviders(
+                    dataProviders, method, annotation,
+                    conditional.map(Conditional::value).orElse(null),
+                    tab.map(Tab::value).orElse(null),
+                    pluginInfo.name(), parameterClass
+            );
+        }
+    }
+
+    /**
+     * Functional interface for defining a method that places required DataProvider to DataProviders.
+     *
+     * @param <T> Type of the annotation on the method that is going to be extracted.
+     */
+    interface DataProviderFactory<T extends Annotation> {
+        void placeToDataProviders(
+                DataProviders dataProviders,
+                Method method, T annotation, String condition, String tab, String pluginName, Optional<Class> parameter
+        );
+    }
 }

Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/providers/BooleanDataProvider.java

@@ -0,0 +1,107 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.djrapitops.plan.extension.implementation.providers;
+
+import com.djrapitops.plan.extension.Group;
+import com.djrapitops.plan.extension.annotation.BooleanProvider;
+import com.djrapitops.plan.extension.icon.Icon;
+
+import java.lang.reflect.Method;
+import java.util.Optional;
+import java.util.UUID;
+
+/**
+ * Represents a DataExtension API method annotated with {@link BooleanProvider} annotation.
+ * <p>
+ * Used to obtain data to place in the database.
+ *
+ * @author Rsl1122
+ */
+public class BooleanDataProvider<T> extends DataProvider<T, Boolean> {
+
+    private final String providedCondition;
+
+    private BooleanDataProvider(
+            String plugin, String condition, String tab, int priority, Icon icon,
+            String text, String description, MethodWrapper<T, Boolean> method, String providedCondition
+    ) {
+        super(plugin, condition, tab, priority, icon, text, description, method);
+
+        this.providedCondition = providedCondition;
+    }
+
+    public static void placeToDataProviders(
+            DataProviders dataProviders, Method method, BooleanProvider annotation,
+            String condition, String tab, String pluginName, Optional<Class> parameterClass
+    ) {
+        if (parameterClass.isPresent()) {
+            if (UUID.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        UUID.class, Boolean.class,
+                        new BooleanDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, UUID.class, Boolean.class),
+                                annotation.conditionName()
+                        )
+                );
+            } else if (String.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        String.class, Boolean.class,
+                        new BooleanDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, String.class, Boolean.class),
+                                annotation.conditionName()
+                        )
+                );
+            } else if (Group.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        Group.class, Boolean.class,
+                        new BooleanDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, Group.class, Boolean.class),
+                                annotation.conditionName()
+                        )
+                );
+            }
+        } else {
+            dataProviders.put(
+                    null, Boolean.class,
+                    new BooleanDataProvider<>(
+                            pluginName, condition, tab,
+                            annotation.priority(),
+                            new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                            annotation.text(), annotation.description(),
+                            new MethodWrapper<>(method, null, Boolean.class),
+                            annotation.conditionName()
+                    )
+            );
+        }
+    }
+
+    public Optional<String> getProvidedCondition() {
+        return Optional.ofNullable(providedCondition);
+    }
+}

Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/providers/DoubleDataProvider.java

@@ -0,0 +1,95 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.djrapitops.plan.extension.implementation.providers;
+
+import com.djrapitops.plan.extension.Group;
+import com.djrapitops.plan.extension.annotation.DoubleProvider;
+import com.djrapitops.plan.extension.icon.Icon;
+
+import java.lang.reflect.Method;
+import java.util.Optional;
+import java.util.UUID;
+
+/**
+ * Represents a DataExtension API method annotated with {@link DoubleProvider} annotation.
+ * <p>
+ * Used to obtain data to place in the database.
+ *
+ * @author Rsl1122
+ */
+public class DoubleDataProvider<T> extends DataProvider<T, Double> {
+
+    private DoubleDataProvider(
+            String plugin, String condition, String tab, int priority, Icon icon,
+            String text, String description, MethodWrapper<T, Double> method
+    ) {
+        super(plugin, condition, tab, priority, icon, text, description, method);
+    }
+
+    public static void placeToDataProviders(
+            DataProviders dataProviders, Method method, DoubleProvider annotation,
+            String condition, String tab, String pluginName, Optional<Class> parameterClass
+    ) {
+        if (parameterClass.isPresent()) {
+            if (UUID.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        UUID.class, Double.class,
+                        new DoubleDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, UUID.class, Double.class)
+                        )
+                );
+            } else if (String.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        String.class, Double.class,
+                        new DoubleDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, String.class, Double.class)
+                        )
+                );
+            } else if (Group.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        Group.class, Double.class,
+                        new DoubleDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, Group.class, Double.class)
+                        )
+                );
+            }
+        } else {
+            dataProviders.put(
+                    null, Double.class,
+                    new DoubleDataProvider<>(
+                            pluginName, condition, tab,
+                            annotation.priority(),
+                            new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                            annotation.text(), annotation.description(),
+                            new MethodWrapper<>(method, null, Double.class)
+                    )
+            );
+        }
+    }
+}

Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/providers/MethodWrapper.java

@@ -29,15 +29,23 @@ import java.lang.reflect.Method;
 public class MethodWrapper<T, K> {
 
     private final Method method;
-    private final Class<K> result;
+    private final Class<T> parameterType;
+    private final Class<K> resultType;
 
-    public MethodWrapper(Method method, Class<T> parameter, Class<K> result) {
+    public MethodWrapper(Method method, Class<T> parameterType, Class<K> resultType) {
         this.method = method;
-        this.result = result;
+        this.parameterType = parameterType;
+        this.resultType = resultType;
     }
 
     public K callMethod(DataExtension extension, T parameter) throws InvocationTargetException, IllegalAccessException {
-        return result.cast(method.invoke(extension, parameter));
+        if (parameterType == null) {
+            return resultType.cast(method.invoke(extension));
+        }
+        if (parameterType.isInstance(parameter)) {
+            return resultType.cast(method.invoke(extension, parameter));
+        }
+        throw new IllegalArgumentException(parameter.getClass().getName() + " can not be accepted as parameter when type is " + parameterType.getName());
     }
 
     public String getMethodName() {

Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/providers/NumberDataProvider.java

@@ -0,0 +1,95 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.djrapitops.plan.extension.implementation.providers;
+
+import com.djrapitops.plan.extension.Group;
+import com.djrapitops.plan.extension.annotation.NumberProvider;
+import com.djrapitops.plan.extension.icon.Icon;
+
+import java.lang.reflect.Method;
+import java.util.Optional;
+import java.util.UUID;
+
+/**
+ * Represents a DataExtension API method annotated with {@link NumberProvider} annotation.
+ * <p>
+ * Used to obtain data to place in the database.
+ *
+ * @author Rsl1122
+ */
+public class NumberDataProvider<T> extends DataProvider<T, Long> {
+
+    private NumberDataProvider(
+            String plugin, String condition, String tab, int priority, Icon icon,
+            String text, String description, MethodWrapper<T, Long> method
+    ) {
+        super(plugin, condition, tab, priority, icon, text, description, method);
+    }
+
+    public static void placeToDataProviders(
+            DataProviders dataProviders, Method method, NumberProvider annotation,
+            String condition, String tab, String pluginName, Optional<Class> parameterClass
+    ) {
+        if (parameterClass.isPresent()) {
+            if (UUID.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        UUID.class, Long.class,
+                        new NumberDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, UUID.class, Long.class)
+                        )
+                );
+            } else if (String.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        String.class, Long.class,
+                        new NumberDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, String.class, Long.class)
+                        )
+                );
+            } else if (Group.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        Group.class, Long.class,
+                        new NumberDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, Group.class, Long.class)
+                        )
+                );
+            }
+        } else {
+            dataProviders.put(
+                    null, Long.class,
+                    new NumberDataProvider<>(
+                            pluginName, condition, tab,
+                            annotation.priority(),
+                            new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                            annotation.text(), annotation.description(),
+                            new MethodWrapper<>(method, null, Long.class)
+                    )
+            );
+        }
+    }
+}

Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/providers/PercentageDataProvider.java

@@ -0,0 +1,95 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.djrapitops.plan.extension.implementation.providers;
+
+import com.djrapitops.plan.extension.Group;
+import com.djrapitops.plan.extension.annotation.PercentageProvider;
+import com.djrapitops.plan.extension.icon.Icon;
+
+import java.lang.reflect.Method;
+import java.util.Optional;
+import java.util.UUID;
+
+/**
+ * Represents a DataExtension API method annotated with {@link PercentageProvider} annotation.
+ * <p>
+ * Used to obtain data to place in the database.
+ *
+ * @author Rsl1122
+ */
+public class PercentageDataProvider<T> extends DataProvider<T, Double> {
+
+    private PercentageDataProvider(
+            String plugin, String condition, String tab, int priority, Icon icon,
+            String text, String description, MethodWrapper<T, Double> method
+    ) {
+        super(plugin, condition, tab, priority, icon, text, description, method);
+    }
+
+    public static void placeToDataProviders(
+            DataProviders dataProviders, Method method, PercentageProvider annotation,
+            String condition, String tab, String pluginName, Optional<Class> parameterClass
+    ) {
+        if (parameterClass.isPresent()) {
+            if (UUID.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        UUID.class, Double.class,
+                        new PercentageDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, UUID.class, Double.class)
+                        )
+                );
+            } else if (String.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        String.class, Double.class,
+                        new PercentageDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, String.class, Double.class)
+                        )
+                );
+            } else if (Group.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        Group.class, Double.class,
+                        new PercentageDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, Group.class, Double.class)
+                        )
+                );
+            }
+        } else {
+            dataProviders.put(
+                    null, Double.class,
+                    new PercentageDataProvider<>(
+                            pluginName, condition, tab,
+                            annotation.priority(),
+                            new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                            annotation.text(), annotation.description(),
+                            new MethodWrapper<>(method, null, Double.class)
+                    )
+            );
+        }
+    }
+}

Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/providers/StringDataProvider.java

@@ -0,0 +1,95 @@
+/*
+ *  This file is part of Player Analytics (Plan).
+ *
+ *  Plan is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License v3 as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Plan is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with Plan. If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.djrapitops.plan.extension.implementation.providers;
+
+import com.djrapitops.plan.extension.Group;
+import com.djrapitops.plan.extension.annotation.StringProvider;
+import com.djrapitops.plan.extension.icon.Icon;
+
+import java.lang.reflect.Method;
+import java.util.Optional;
+import java.util.UUID;
+
+/**
+ * Represents a DataExtension API method annotated with {@link StringProvider} annotation.
+ * <p>
+ * Used to obtain data to place in the database.
+ *
+ * @author Rsl1122
+ */
+public class StringDataProvider<T> extends DataProvider<T, String> {
+
+    private StringDataProvider(
+            String plugin, String condition, String tab, int priority, Icon icon,
+            String text, String description, MethodWrapper<T, String> method
+    ) {
+        super(plugin, condition, tab, priority, icon, text, description, method);
+    }
+
+    public static void placeToDataProviders(
+            DataProviders dataProviders, Method method, StringProvider annotation,
+            String condition, String tab, String pluginName, Optional<Class> parameterClass
+    ) {
+        if (parameterClass.isPresent()) {
+            if (UUID.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        UUID.class, String.class,
+                        new StringDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, UUID.class, String.class)
+                        )
+                );
+            } else if (String.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        String.class, String.class,
+                        new StringDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, String.class, String.class)
+                        )
+                );
+            } else if (Group.class.isAssignableFrom(parameterClass.get())) {
+                dataProviders.put(
+                        Group.class, String.class,
+                        new StringDataProvider<>(
+                                pluginName, condition, tab,
+                                annotation.priority(),
+                                new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                                annotation.text(), annotation.description(),
+                                new MethodWrapper<>(method, Group.class, String.class)
+                        )
+                );
+            }
+        } else {
+            dataProviders.put(
+                    null, String.class,
+                    new StringDataProvider<>(
+                            pluginName, condition, tab,
+                            annotation.priority(),
+                            new Icon(annotation.iconFamily(), annotation.iconName(), annotation.iconColor()),
+                            annotation.text(), annotation.description(),
+                            new MethodWrapper<>(method, null, String.class)
+                    )
+            );
+        }
+    }
+}