1 files changed, 83 insertions, 0 deletions
diff --git a/core/java/android/gesture/Learner.java b/core/java/android/gesture/Learner.java
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+++ b/core/java/android/gesture/Learner.java
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+/*
+ * Copyright (C) 2008-2009 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 android.gesture;
+
+import java.util.ArrayList;
+
+/**
+ * The abstract class of a gesture learner
+ */
+abstract class Learner {
+    private final ArrayList<Instance> mInstances = new ArrayList<Instance>();
+
+    /**
+     * Add an instance to the learner
+     * 
+     * @param instance
+     */
+    void addInstance(Instance instance) {
+        mInstances.add(instance);
+    }
+
+    /**
+     * Retrieve all the instances
+     * 
+     * @return instances
+     */
+    ArrayList<Instance> getInstances() {
+        return mInstances;
+    }
+
+    /**
+     * Remove an instance based on its id
+     * 
+     * @param id
+     */
+    void removeInstance(long id) {
+        ArrayList<Instance> instances = mInstances;
+        int count = instances.size();
+        for (int i = 0; i < count; i++) {
+            Instance instance = instances.get(i);
+            if (id == instance.id) {
+                instances.remove(instance);
+                return;
+            }
+        }
+    }
+
+    /**
+     * Remove all the instances of a category
+     * 
+     * @param name the category name
+     */
+    void removeInstances(String name) {
+        final ArrayList<Instance> toDelete = new ArrayList<Instance>();
+        final ArrayList<Instance> instances = mInstances;
+        final int count = instances.size();
+
+        for (int i = 0; i < count; i++) {
+            final Instance instance = instances.get(i);
+            // the label can be null, as specified in Instance
+            if ((instance.label == null && name == null) || instance.label.equals(name)) {
+                toDelete.add(instance);
+            }
+        }
+        instances.removeAll(toDelete);
+    }
+
+    abstract ArrayList<Prediction> classify(int gestureType, float[] vector);
+}