Toggles introduced.

flower-core/src/main/java/com/github/xdcrafts/flower/core/impl/middleware/ToggleMiddleware.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2017 Vadim Dubs https://github.com/xdcrafts
+ *
+ * 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.
+ */
+
+package com.github.xdcrafts.flower.core.impl.middleware;
+
+import com.github.xdcrafts.flower.core.Middleware;
+
+import java.util.Map;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+/**
+ * Toggle middleware.
+ */
+public class ToggleMiddleware implements Middleware, Supplier<Boolean> {
+
+    private final String name;
+    private volatile boolean isEnabled;
+
+    public ToggleMiddleware(String name) {
+        this.name = name;
+    }
+
+    public ToggleMiddleware(String name, boolean isEnabled) {
+        this.name = name;
+        this.isEnabled = isEnabled;
+    }
+
+    public void setEnabled(boolean enabled) {
+        this.isEnabled = enabled;
+    }
+
+    public void setEnabled(String enabled) {
+        this.isEnabled = Boolean.valueOf(enabled);
+    }
+
+    @Override
+    public String getName() {
+        return this.name;
+    }
+
+    @Override
+    public Boolean get() {
+        return this.isEnabled;
+    }
+
+    @Override
+    public Function<Map, Map> apply(Map<String, Object> stringObjectMap, Function<Map, Map> mapMapFunction) {
+        return ctx -> this.isEnabled ? mapMapFunction.apply(ctx) : ctx;
+    }
+
+    @Override
+    public String toString() {
+        return "ToggleMiddleware{"
+                + "name='" + name + '\''
+                + ", isEnabled=" + isEnabled
+                + '}';
+    }
+}

flower-core/src/main/java/com/github/xdcrafts/flower/core/impl/selectors/Toggle.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2017 Vadim Dubs https://github.com/xdcrafts
+ *
+ * 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.
+ */
+
+package com.github.xdcrafts.flower.core.impl.selectors;
+
+import java.util.Map;
+import java.util.function.Predicate;
+
+/**
+ * Toggle predicate.
+ */
+public class Toggle implements Predicate<Map> {
+
+    private volatile boolean isEnabled = false;
+
+    public Toggle() {
+    }
+
+    public Toggle(boolean isEnabled) {
+        this.isEnabled = isEnabled;
+    }
+
+    public void setEnabled(boolean enabled) {
+        isEnabled = enabled;
+    }
+
+    public void setEnabled(String enabled) {
+        this.isEnabled = Boolean.valueOf(enabled);
+    }
+
+    @Override
+    public boolean test(Map map) {
+        return this.isEnabled;
+    }
+
+    @Override
+    public String toString() {
+        return "Toggle{"
+                + "isEnabled=" + this.isEnabled
+                + '}';
+    }
+}
+