Events logcat parser

Parse the transition delay items from the events log.
Bug 28793299

Test Status : 7 tests passed

Change-Id: Idd300c4baa0282244b285ce78e1b865ff3522c0d

1 files changed, 111 insertions, 0 deletions

diff --git a/src/com/android/loganalysis/parser/EventsLogParser.java b/src/com/android/loganalysis/parser/EventsLogParser.java
new file mode 100644
index 0000000..068feeb
--- /dev/null
+++ b/src/com/android/loganalysis/parser/EventsLogParser.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2016 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.IItem;
+import com.android.loganalysis.item.TransitionDelayItem;
+
+import java.io.IOException;
+import java.io.BufferedReader;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Parse the events logs. </p>
+ */
+public class EventsLogParser implements IParser {
+
+    // 08-21 17:53:53.876 1053 2135 I am_restart_activity:
+    // [0,188098346,127,com.google.android.gm/.ConversationListActivityGmail]
+    private static final Pattern ACTIVITY_RESTART = Pattern.compile("^\\d{2}-\\d{2} \\d{2}:\\d{2}"
+            + ":\\d{2}.\\d{3}\\s+\\d+\\s+\\d+ I am_restart_activity: "
+            + "\\[\\d+\\,\\d+\\,\\d+\\,(?<componentname>.*)\\]$");
+    // 08-21 17:57:15.363 1053 2095 I am_resume_activity:
+    // [0,228277756,132,com.google.android.gm/.ConversationListActivityGmail]
+    private static final Pattern ACTIVITY_RESUME = Pattern.compile("^\\d{2}-\\d{2} \\d{2}:\\d{2}"
+            + ":\\d{2}.\\d{3}\\s+\\d+\\s+\\d+ I am_resume_activity: "
+            + "\\[\\d+\\,\\d+\\,\\d+\\,(?<componentname>.*)\\]$");
+    // 08-21 17:53:53.893 1053 1115 I sysui_action: [321,74]
+    private static final Pattern STARTING_WINDOW_DELAY = Pattern.compile("^\\d{2}-\\d{2} \\d{2}:"
+            + "\\d{2}:\\d{2}.\\d{3}\\s+\\d+\\s+\\d+ I sysui_action: \\[321,(?<startdelay>.*)\\]$");
+    // 08-21 17:54:16.672 1053 1115 I sysui_action: [319,99]
+    private static final Pattern TRANSITION_DELAY = Pattern
+            .compile("^\\d{2}-\\d{2} \\d{2}:"
+                    + "\\d{2}:\\d{2}.\\d{3}\\s+\\d+\\s+\\d+ I sysui_action: \\[319,"
+                    + "(?<transitdelay>.*)\\]$");
+
+    @Override
+    public IItem parse(List<String> lines) {
+        throw new UnsupportedOperationException("Method has not been implemented in lieu"
+                + " of others");
+    }
+
+    /**
+     * Method to parse the transition delay information from the events log
+     *
+     * @param input
+     * @return
+     * @throws IOException
+     */
+    public List<TransitionDelayItem> parseTransitionDelayInfo(BufferedReader input)
+            throws IOException {
+        List<TransitionDelayItem> transitionDelayItems = new ArrayList<TransitionDelayItem>();
+        String line;
+        List<String> componentNameStack = new ArrayList<String>();
+        boolean isRecentStartWindowDelay = false;
+        while ((line = input.readLine()) != null) {
+            Matcher match = null;
+            if (((match = matches(ACTIVITY_RESTART, line))) != null ||
+                    ((match = matches(ACTIVITY_RESUME, line)) != null)) {
+                componentNameStack.add(match.group("componentname"));
+                isRecentStartWindowDelay = false;
+            } else if (((match = matches(STARTING_WINDOW_DELAY, line)) != null)
+                    && (componentNameStack.size() > 0)) {
+                TransitionDelayItem delayItem = new TransitionDelayItem();
+                delayItem.setComponentName(
+                        componentNameStack.remove(componentNameStack.size() - 1));
+                delayItem.setStartingWindowDelay(Long.parseLong(match.group("startdelay")));
+                delayItem.setTransitionDelay(-1);
+                transitionDelayItems.add(delayItem);
+                isRecentStartWindowDelay = true;
+            } else if (((match = matches(TRANSITION_DELAY, line)) != null)
+                    && (componentNameStack.size() > 0) && !isRecentStartWindowDelay) {
+                TransitionDelayItem delayItem = new TransitionDelayItem();
+                delayItem.setComponentName(
+                        componentNameStack.remove(componentNameStack.size() - 1));
+                delayItem.setTransitionDelay(Long.parseLong(match.group("transitdelay")));
+                delayItem.setStartingWindowDelay(-1);
+                transitionDelayItems.add(delayItem);
+            }
+        }
+        return transitionDelayItems;
+    }
+
+    /**
+     * Checks whether {@code line} matches the given {@link Pattern}.
+     *
+     * @return The resulting {@link Matcher} obtained by matching the {@code line} against
+     *         {@code pattern}, or null if the {@code line} does not match.
+     */
+    private static Matcher matches(Pattern pattern, String line) {
+        Matcher ret = pattern.matcher(line);
+        return ret.matches() ? ret : null;
+    }
+
+}