[#217] Refactor Query Engine code

src/main/2.7.0/org/apache/hadoop/util/CollectionGSetWrapper.java

@@ -0,0 +1,86 @@
+/**
+ * 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 org.apache.hadoop.util;
+
+import com.googlecode.cqengine.IndexedCollection;
+import java.util.Iterator;
+import org.apache.hadoop.hdfs.server.namenode.INode;
+import org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields;
+import org.jetbrains.annotations.NotNull;
+
+public class CollectionGSetWrapper implements GSet<INode, INodeWithAdditionalFields> {
+
+  private final IndexedCollection<INode> wrapped;
+  private final GSet<INode, INodeWithAdditionalFields> backing;
+
+  public CollectionGSetWrapper(
+      IndexedCollection<INode> wrapped, GSet<INode, INodeWithAdditionalFields> backing) {
+    this.wrapped = wrapped;
+    this.backing = backing;
+  }
+
+  @Override
+  public int size() {
+    return backing.size();
+  }
+
+  @Override
+  public boolean contains(INode element) {
+    return backing.contains(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields get(INode element) {
+    return backing.get(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields put(INodeWithAdditionalFields element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.add(element);
+      return prev;
+    } else {
+      wrapped.add(element);
+      return null;
+    }
+  }
+
+  @Override
+  public INodeWithAdditionalFields remove(INode element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.remove(element);
+      return prev;
+    }
+    return null;
+  }
+
+  @Override
+  public void clear() {
+    wrapped.clear();
+  }
+
+  @NotNull
+  @Override
+  public Iterator<INodeWithAdditionalFields> iterator() {
+    return backing.iterator();
+  }
+}

src/main/2.8.0/org/apache/hadoop/util/CollectionGSetWrapper.java

@@ -0,0 +1,92 @@
+/**
+ * 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 org.apache.hadoop.util;
+
+import com.googlecode.cqengine.IndexedCollection;
+import java.util.Collection;
+import java.util.Iterator;
+import org.apache.hadoop.hdfs.server.namenode.INode;
+import org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields;
+import org.jetbrains.annotations.NotNull;
+
+public class CollectionGSetWrapper implements GSet<INode, INodeWithAdditionalFields> {
+
+  private final IndexedCollection<INode> wrapped;
+  private final GSet<INode, INodeWithAdditionalFields> backing;
+
+  public CollectionGSetWrapper(
+      IndexedCollection<INode> wrapped, GSet<INode, INodeWithAdditionalFields> backing) {
+    this.wrapped = wrapped;
+    this.backing = backing;
+  }
+
+  @Override
+  public int size() {
+    return backing.size();
+  }
+
+  @Override
+  public boolean contains(INode element) {
+    return backing.contains(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields get(INode element) {
+    return backing.get(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields put(INodeWithAdditionalFields element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.add(element);
+      return prev;
+    } else {
+      wrapped.add(element);
+      return null;
+    }
+  }
+
+  @Override
+  public INodeWithAdditionalFields remove(INode element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.remove(element);
+      return prev;
+    }
+    return null;
+  }
+
+  @Override
+  public void clear() {
+    wrapped.clear();
+  }
+
+  @Override
+  public Collection<INodeWithAdditionalFields> values() {
+    return backing.values();
+  }
+
+  @NotNull
+  @Override
+  public Iterator<INodeWithAdditionalFields> iterator() {
+    return backing.iterator();
+  }
+}

src/main/2.9.0/org/apache/hadoop/util/CollectionGSetWrapper.java

@@ -0,0 +1,92 @@
+/**
+ * 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 org.apache.hadoop.util;
+
+import com.googlecode.cqengine.IndexedCollection;
+import java.util.Collection;
+import java.util.Iterator;
+import org.apache.hadoop.hdfs.server.namenode.INode;
+import org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields;
+import org.jetbrains.annotations.NotNull;
+
+public class CollectionGSetWrapper implements GSet<INode, INodeWithAdditionalFields> {
+
+  private final IndexedCollection<INode> wrapped;
+  private final GSet<INode, INodeWithAdditionalFields> backing;
+
+  public CollectionGSetWrapper(
+      IndexedCollection<INode> wrapped, GSet<INode, INodeWithAdditionalFields> backing) {
+    this.wrapped = wrapped;
+    this.backing = backing;
+  }
+
+  @Override
+  public int size() {
+    return backing.size();
+  }
+
+  @Override
+  public boolean contains(INode element) {
+    return backing.contains(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields get(INode element) {
+    return backing.get(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields put(INodeWithAdditionalFields element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.add(element);
+      return prev;
+    } else {
+      wrapped.add(element);
+      return null;
+    }
+  }
+
+  @Override
+  public INodeWithAdditionalFields remove(INode element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.remove(element);
+      return prev;
+    }
+    return null;
+  }
+
+  @Override
+  public void clear() {
+    wrapped.clear();
+  }
+
+  @Override
+  public Collection<INodeWithAdditionalFields> values() {
+    return backing.values();
+  }
+
+  @NotNull
+  @Override
+  public Iterator<INodeWithAdditionalFields> iterator() {
+    return backing.iterator();
+  }
+}

src/main/3.0.0/org/apache/hadoop/util/CollectionGSetWrapper.java

@@ -0,0 +1,92 @@
+/**
+ * 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 org.apache.hadoop.util;
+
+import com.googlecode.cqengine.IndexedCollection;
+import java.util.Collection;
+import java.util.Iterator;
+import org.apache.hadoop.hdfs.server.namenode.INode;
+import org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields;
+import org.jetbrains.annotations.NotNull;
+
+public class CollectionGSetWrapper implements GSet<INode, INodeWithAdditionalFields> {
+
+  private final IndexedCollection<INode> wrapped;
+  private final GSet<INode, INodeWithAdditionalFields> backing;
+
+  public CollectionGSetWrapper(
+      IndexedCollection<INode> wrapped, GSet<INode, INodeWithAdditionalFields> backing) {
+    this.wrapped = wrapped;
+    this.backing = backing;
+  }
+
+  @Override
+  public int size() {
+    return backing.size();
+  }
+
+  @Override
+  public boolean contains(INode element) {
+    return backing.contains(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields get(INode element) {
+    return backing.get(element);
+  }
+
+  @Override
+  public INodeWithAdditionalFields put(INodeWithAdditionalFields element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.add(element);
+      return prev;
+    } else {
+      wrapped.add(element);
+      return null;
+    }
+  }
+
+  @Override
+  public INodeWithAdditionalFields remove(INode element) {
+    if (backing.contains(element)) {
+      INodeWithAdditionalFields prev = backing.get(element);
+      wrapped.remove(element);
+      return prev;
+    }
+    return null;
+  }
+
+  @Override
+  public void clear() {
+    wrapped.clear();
+  }
+
+  @Override
+  public Collection<INodeWithAdditionalFields> values() {
+    return backing.values();
+  }
+
+  @NotNull
+  @Override
+  public Iterator<INodeWithAdditionalFields> iterator() {
+    return backing.iterator();
+  }
+}