HugeGraph-410: improve code style

Change-Id: Idce80465ea4cbe92ac836bbc8d293e77ad7c7c5c

src/main/java/com/baidu/hugegraph/concurrent/KeyLock.java

@@ -28,6 +28,7 @@ public class KeyLock {
     private Striped<Lock> locks;
 
     public KeyLock() {
+        // The default size is availableProcessors() * 4
         this(Runtime.getRuntime().availableProcessors() << 2);
     }
 

src/main/java/com/baidu/hugegraph/concurrent/LockManager.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.concurrent;
 
 import java.util.Map;

src/main/java/com/baidu/hugegraph/config/ConfigException.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.config;
+
+public class ConfigException extends RuntimeException {
+
+    private static final long serialVersionUID = -8711375282196157058L;
+
+    public ConfigException(String message) {
+        super(message);
+    }
+
+    public ConfigException(String msg, Throwable cause) {
+        super(msg, cause);
+    }
+}

src/main/java/com/baidu/hugegraph/config/ConfigOption.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.config;
 
 import java.util.Set;

src/main/java/com/baidu/hugegraph/config/HugeConfig.java

@@ -1,5 +1,20 @@
 /*
- * Copyright (C) 2017 Baidu, Inc. All Rights Reserved.
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.config;
@@ -17,7 +32,6 @@ import org.apache.commons.configuration.PropertiesConfiguration;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.baidu.hugegraph.exception.ConfigException;
 import com.baidu.hugegraph.util.E;
 
 public class HugeConfig extends PropertiesConfiguration {

src/main/java/com/baidu/hugegraph/config/OptionChecker.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.config;
 
 import java.lang.reflect.Array;

src/main/java/com/baidu/hugegraph/config/OptionHolder.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.config;
 
 import java.lang.reflect.Field;
@@ -7,8 +26,6 @@ import java.util.Map;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.baidu.hugegraph.exception.ConfigException;
-
 /**
  * Created by liningrui on 2017/5/25.
  */
@@ -39,6 +56,6 @@ public class OptionHolder {
     }
 
     public Map<String, ConfigOption> options() {
-        return options;
+        return this.options;
     }
 }

src/main/java/com/baidu/hugegraph/config/OptionSpace.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.config;
 
 import java.util.Map;

src/main/java/com/baidu/hugegraph/event/Event.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.event;
 
 import java.util.Arrays;

src/main/java/com/baidu/hugegraph/event/EventHub.java

@@ -41,8 +41,9 @@ public class EventHub {
     private static final Logger logger =
                          LoggerFactory.getLogger(EventHub.class);
 
-    // Event executor
     public static final String ANY_EVENT = "*";
+
+    // Event executor
     private static ExecutorService executor = null;
 
     private String name;

src/main/java/com/baidu/hugegraph/event/EventListener.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.event;
 
 public interface EventListener extends java.util.EventListener {

src/main/java/com/baidu/hugegraph/exception/ConfigException.java

@@ -1,14 +0,0 @@
-package com.baidu.hugegraph.exception;
-
-public class ConfigException extends RuntimeException {
-
-    private static final long serialVersionUID = -8711375282196157058L;
-
-    public ConfigException(String message) {
-        super(message);
-    }
-
-    public ConfigException(String msg, Throwable cause) {
-        super(msg, cause);
-    }
-}

src/main/java/com/baidu/hugegraph/perf/PerfUtil.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.perf;
 
 import java.io.IOException;

src/main/java/com/baidu/hugegraph/perf/Stopwatch.java

@@ -20,6 +20,7 @@
 package com.baidu.hugegraph.perf;
 
 public class Stopwatch implements Cloneable {
+
     private long lastStartTime = -1L;
 
     private long totalCost = 0L;
@@ -37,7 +38,7 @@ public class Stopwatch implements Cloneable {
     }
 
     public String id() {
-        return id(this.parent, this.name);
+        return Stopwatch.id(this.parent, this.name);
     }
 
     public static String id(String parent, String name) {
@@ -56,22 +57,23 @@ public class Stopwatch implements Cloneable {
     }
 
     public void startTime(long time) {
-        assert this.lastStartTime == -1;
+        assert this.lastStartTime == -1L;
+
         this.lastStartTime = time;
         this.times++;
     }
 
     public void endTime(long time) {
-        assert time >= this.lastStartTime && this.lastStartTime != -1;
+        assert time >= this.lastStartTime && this.lastStartTime != -1L;
 
         long cost = time - this.lastStartTime;
         this.totalCost += cost;
-        this.lastStartTime = -1;
+        this.lastStartTime = -1L;
         this.updateMinMax(cost);
     }
 
     protected void updateMinMax(long cost) {
-        if (this.minCost > cost || this.minCost == 0) {
+        if (this.minCost > cost || this.minCost == 0L) {
             this.minCost = cost;
         }
         if (this.maxCost < cost) {
@@ -111,7 +113,7 @@ public class Stopwatch implements Cloneable {
     public String toString() {
         return String.format(
                 "{totalCost:%sms, minCost:%sns, maxCost:%sns, times:%s}",
-                this.totalCost / 1000000.0,
+                this.totalCost / 1000000.0F,
                 this.minCost, this.maxCost,
                 this.times);
     }

src/main/java/com/baidu/hugegraph/type/ExtendableIterator.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.type;
 
 import java.util.Deque;

src/main/java/com/baidu/hugegraph/type/Shard.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.type;
 
 /**

src/main/java/com/baidu/hugegraph/type/TriFunction.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.type;
 
 public interface TriFunction <T1, T2, T3, R> {

src/main/java/com/baidu/hugegraph/util/CollectionUtil.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.util;
 
 import java.util.Collection;

src/main/java/com/baidu/hugegraph/util/E.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.util;
 
 import java.util.Collection;

src/main/java/com/baidu/hugegraph/util/HashUtil.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.util;
 
 import java.nio.charset.Charset;

src/main/java/com/baidu/hugegraph/util/ReflectionUtil.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.util;
 
 import java.io.IOException;

src/main/java/com/baidu/hugegraph/util/TimeUtil.java

@@ -1,3 +1,22 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You 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.baidu.hugegraph.util;
 
 import java.util.Date;