Handle special case slices

Create a handler for any slice that doesn't include anything
from a PreferenceController.

Test: robotests
Change-Id: If23947152d61877537d0cac6240e96b9ab977bce
Bug: 80263568

src/com/android/settings/slices/CustomSliceManager.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.android.settings.slices;
+
+import android.content.Context;
+import android.net.Uri;
+import android.util.ArrayMap;
+
+import java.util.Map;
+
+/**
+ * Manages custom {@link androidx.slice.Slice Slices}, which are all Slices not backed by
+ * preferences.
+ * <p>
+ *     By default, all Slices in Settings should be built by a
+ * </p>
+ */
+public class CustomSliceManager {
+
+    protected final Map<Uri, Class<? extends CustomSliceable>> mUriMap;
+
+    private final Context mContext;
+
+    public CustomSliceManager(Context context) {
+        mContext = context;
+        mUriMap = new ArrayMap<>();
+        addSlices();
+    }
+
+    /**
+     * Return a {@link CustomSliceable} associated to the Uri.
+     * <p>
+     * Do not change this method signature to accommodate for a special-case slicable - a context is
+     * the only thing that should be needed to create the object.
+     */
+    public CustomSliceable getSliceableFromUri(Uri uri) {
+        final Class clazz = mUriMap.get(uri);
+
+        if (clazz == null) {
+            throw new IllegalArgumentException("No Slice found for uri: " + uri);
+        }
+
+        return CustomSliceable.createInstance(mContext, clazz);
+    }
+
+    /**
+     * Return a {@link CustomSliceable} associated to the Action.
+     * <p>
+     * Do not change this method signature to accommodate for a special-case sliceable - a context
+     * is the only thing that should be needed to create the object.
+     */
+    public CustomSliceable getSliceableFromIntentAction(String action) {
+        return getSliceableFromUri(Uri.parse(action));
+    }
+
+    /**
+     * Returns {@code true} if {@param uri} is a valid Slice Uri handled by
+     * {@link CustomSliceManager}.
+     */
+    public boolean isValidUri(Uri uri) {
+        return mUriMap.containsKey(uri);
+    }
+
+    /**
+     * Returns {@code true} if {@param action} is a valid intent action handled by
+     * {@link CustomSliceManager}.
+     */
+    public boolean isValidAction(String action) {
+        return isValidUri(Uri.parse(action));
+    }
+
+    private void addSlices() {
+    }
+}