Move NativeDaemonConnector to varargs.

Perform uniform argument escaping inside NativeDaemonConnector, using
varargs to separate boundaries.  Also move to parsed NativeDaemonEvent
instances instead of raw Strings.

Bug: 5472606
Change-Id: I1270733e2b2eeb2f6b810240df82ab24d38ebf40

services/java/com/android/server/NativeDaemonEvent.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2011 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.server;
+
+/**
+ * Parsed event from native side of {@link NativeDaemonConnector}.
+ */
+public class NativeDaemonEvent {
+
+    // TODO: keep class ranges in sync with ResponseCode.h
+    // TODO: swap client and server error ranges to roughly mirror HTTP spec
+
+    private final int mCode;
+    private final String mMessage;
+    private final String mRawEvent;
+
+    private NativeDaemonEvent(int code, String message, String rawEvent) {
+        mCode = code;
+        mMessage = message;
+        mRawEvent = rawEvent;
+    }
+
+    public int getCode() {
+        return mCode;
+    }
+
+    public String getMessage() {
+        return mMessage;
+    }
+
+    @Deprecated
+    public String getRawEvent() {
+        return mRawEvent;
+    }
+
+    @Override
+    public String toString() {
+        return mRawEvent;
+    }
+
+    /**
+     * Test if event represents a partial response which is continued in
+     * additional subsequent events.
+     */
+    public boolean isClassContinue() {
+        return mCode >= 100 && mCode < 200;
+    }
+
+    /**
+     * Test if event represents a command success.
+     */
+    public boolean isClassOk() {
+        return mCode >= 200 && mCode < 300;
+    }
+
+    /**
+     * Test if event represents a remote native daemon error.
+     */
+    public boolean isClassServerError() {
+        return mCode >= 400 && mCode < 500;
+    }
+
+    /**
+     * Test if event represents a command syntax or argument error.
+     */
+    public boolean isClassClientError() {
+        return mCode >= 500 && mCode < 600;
+    }
+
+    /**
+     * Test if event represents an unsolicited event from native daemon.
+     */
+    public boolean isClassUnsolicited() {
+        return mCode >= 600 && mCode < 700;
+    }
+
+    /**
+     * Parse the given raw event into {@link NativeDaemonEvent} instance.
+     *
+     * @throws IllegalArgumentException when line doesn't match format expected
+     *             from native side.
+     */
+    public static NativeDaemonEvent parseRawEvent(String rawEvent) {
+        final int splitIndex = rawEvent.indexOf(' ');
+        if (splitIndex == -1) {
+            throw new IllegalArgumentException("unable to find ' ' separator");
+        }
+
+        final int code;
+        try {
+            code = Integer.parseInt(rawEvent.substring(0, splitIndex));
+        } catch (NumberFormatException e) {
+            throw new IllegalArgumentException("problem parsing code", e);
+        }
+
+        final String message = rawEvent.substring(splitIndex + 1);
+        return new NativeDaemonEvent(code, message, rawEvent);
+    }
+}