1 files changed, 103 insertions, 0 deletions
diff --git a/pw_log/java/android_main/dev/pigweed/pw_log/Logger.java b/pw_log/java/android_main/dev/pigweed/pw_log/Logger.java
new file mode 100644
index 000000000..3390011a4
--- /dev/null
+++ b/pw_log/java/android_main/dev/pigweed/pw_log/Logger.java
@@ -0,0 +1,103 @@
+// Copyright 2022 The Pigweed Authors
+//
+// 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
+//
+//     https://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 dev.pigweed.pw_log;
+
+import android.util.Log;
+import java.util.logging.Level;
+
+/**
+ * Partial implementation of the com.google.common.flogger.FluentLogger API that
+ * logs to android.util.Log.
+ */
+public final class Logger {
+  private final String tag;
+
+  public final class AndroidLogApi {
+    private final int level;
+
+    private Throwable cause = null;
+
+    private AndroidLogApi(Level level) {
+      if (level == Level.FINEST || level == Level.FINER) {
+        this.level = Log.VERBOSE;
+      } else if (level == Level.FINE || level == Level.CONFIG) {
+        this.level = Log.DEBUG;
+      } else if (level == Level.WARNING) {
+        this.level = Log.WARN;
+      } else if (level == Level.SEVERE) {
+        this.level = Log.ERROR;
+      } else {
+        this.level = Log.INFO;
+      }
+    }
+
+    public AndroidLogApi withCause(Throwable cause) {
+      this.cause = cause;
+      return this;
+    }
+
+    public void log(String message) {
+      if (cause != null) {
+        message = String.format("%s: %s", cause, message);
+      }
+
+      Log.println(level, tag, message);
+    }
+
+    public void log(String message, Object... args) {
+      log(String.format(message, args));
+    }
+  }
+
+  public static Logger forClass(Class<?> enclosingClass) {
+    return new Logger(enclosingClass.getSimpleName());
+  }
+
+  private Logger(String tag) {
+    this.tag = tag;
+  }
+
+  public AndroidLogApi at(Level level) {
+    return new AndroidLogApi(level);
+  }
+
+  public AndroidLogApi atSevere() {
+    return at(Level.SEVERE);
+  }
+
+  public AndroidLogApi atWarning() {
+    return at(Level.WARNING);
+  }
+
+  public AndroidLogApi atInfo() {
+    return at(Level.INFO);
+  }
+
+  public AndroidLogApi atConfig() {
+    return at(Level.CONFIG);
+  }
+
+  public AndroidLogApi atFine() {
+    return at(Level.FINE);
+  }
+
+  public AndroidLogApi atFiner() {
+    return at(Level.FINER);
+  }
+
+  public AndroidLogApi atFinest() {
+    return at(Level.FINEST);
+  }
+}