Parse the battery usage statistics

Change-Id: I5000e4352ded2eaa004bc486242c241bcdf4dada

1 files changed, 68 insertions, 0 deletions

diff --git a/src/com/android/loganalysis/parser/BatteryUsageParser.java b/src/com/android/loganalysis/parser/BatteryUsageParser.java
new file mode 100644
index 0000000..92cb5d2
--- /dev/null
+++ b/src/com/android/loganalysis/parser/BatteryUsageParser.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2015 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.loganalysis.parser;
+
+import com.android.loganalysis.item.BatteryUsageItem;
+
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * A {@link IParser} to parse battery usage statistics
+ */
+public class BatteryUsageParser implements IParser {
+
+    /**
+     * Matches: Capacity: 3220, Computed drain: 11.0, actual drain: 0
+     */
+    private static final Pattern Capacity = Pattern.compile(
+            "^\\s*Capacity: (\\d+), Computed drain: \\d+.*");
+
+    private static final Pattern Usage = Pattern.compile("^\\s*(.*): (\\d+(\\.\\d*)?)");
+    private BatteryUsageItem mItem = new BatteryUsageItem();
+
+    /**
+     * {@inheritDoc}
+     *
+     * @return The {@link BatteryUsageItem}.
+     */
+    @Override
+    public BatteryUsageItem parse(List<String> lines) {
+        for (String line : lines) {
+            Matcher m = Capacity.matcher(line);
+            if(m.matches()) {
+                mItem.setBatteryCapacity(Integer.parseInt(m.group(1)));
+            } else {
+                m = Usage.matcher(line);
+                if (m.matches()) {
+                    mItem.addBatteryUsage(m.group(1), Double.parseDouble(m.group(2)));
+                }
+            }
+        }
+        return mItem;
+    }
+
+    /**
+     * Get the {@link BatteryUsageItem}.
+     * <p>
+     * Exposed for unit testing.
+     * </p>
+     */
+    BatteryUsageItem getItem() {
+        return mItem;
+    }
+}