Fix thumb load

app/src/main/java/com/hippo/conaco/Register.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * 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.hippo.conaco;
+
+import com.hippo.yorozuya.collect.Multimap;
+import com.hippo.yorozuya.collect.SparseILArray;
+
+import java.util.List;
+
+class Register<V> {
+
+    private final SparseILArray<ConacoTask<V>> mIdMap = new SparseILArray<>();
+    private final Multimap<String, ConacoTask<V>> mKeyMap = Multimap.create();
+
+    /**
+     * @return true for the key is already registered
+     */
+    public synchronized boolean register(int id, ConacoTask<V> task) {
+        boolean repeatedKey = false;
+        String taskKey = task.getKey();
+
+        // For no-key task, there no need to check
+        if (taskKey != null) {
+            repeatedKey = mKeyMap.countElements(taskKey) != 0;
+        }
+
+        // Append task
+        mKeyMap.putElement(taskKey, task);
+        mIdMap.append(id, task);
+
+        return repeatedKey;
+    }
+
+    public synchronized ConacoTask<V> unregister(int id) {
+        ConacoTask<V> task = mIdMap.remove(id);
+        if (task != null) {
+            mKeyMap.removeElement(task.getKey(), task);
+        }
+        return task;
+    }
+
+    public synchronized boolean contain(int id) {
+        return mIdMap.indexOfKey(id) >= 0;
+    }
+
+    public synchronized ConacoTask<V> getByKey(String key) {
+        if (key == null) {
+            return null;
+        }
+
+        List<ConacoTask<V>> list = mKeyMap.get(key);
+        if (list != null && list.size() > 0) {
+            return list.get(0);
+        } else {
+            return null;
+        }
+    }
+}