[CALCITE-536] Add @PackageMarker to package-info.java so maven-compil…

…er skips compilation when the sources are unchanged

This is a temporary workaround for https://jira.codehaus.org/browse/MCOMPILER-205.
The proper fix is to generate empty package-info.class in maven-compiler-plugin when package-info.java is "empty"

avatica-server/src/main/java/org/apache/calcite/avatica/server/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Avatica server that listens for HTTP requests.
  */
+@PackageMarker
 package org.apache.calcite.avatica.server;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

avatica/src/main/java/org/apache/calcite/avatica/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Avatica JDBC framework.
  */
+@PackageMarker
 package org.apache.calcite.avatica;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

avatica/src/main/java/org/apache/calcite/avatica/remote/package-info.java

@@ -18,6 +18,9 @@
 /**
  * JDBC driver that uses remote procedure calls.
  */
+@PackageMarker
 package org.apache.calcite.avatica.remote;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

avatica/src/main/java/org/apache/calcite/avatica/util/PackageMarker.java

@@ -0,0 +1,37 @@
+/*
+ * 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.calcite.avatica.util;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * This is a dummy annotation that forces javac to produce output for
+ * otherwise empty package-info.java.
+ *
+ * <p>The result is maven-compiler-plugin can properly identify the scope of
+ * changed files
+ *
+ * <p>See more details in
+ * <a href="https://jira.codehaus.org/browse/MCOMPILER-205">
+ *   maven-compiler-plugin: incremental compilation broken</a>
+ */
+@Retention(RetentionPolicy.SOURCE)
+public @interface PackageMarker {
+}
+
+// End PackageMarker.java

avatica/src/main/java/org/apache/calcite/avatica/util/package-info.java

@@ -18,6 +18,7 @@
 /**
  * Avatica utilities.
  */
+@PackageMarker
 package org.apache.calcite.avatica.util;
 
 // End package-info.java

avatica/src/test/java/org/apache/calcite/avatica/test/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Avatica tests.
  */
+@PackageMarker
 package org.apache.calcite.avatica.test;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/adapter/clone/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Provides utility classes.
  */
+@PackageMarker
 package org.apache.calcite.adapter.clone;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/adapter/enumerable/impl/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Calcite-specific classes for implementation of regular and window aggregates.
  */
+@PackageMarker
 package org.apache.calcite.adapter.enumerable.impl;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/adapter/enumerable/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Query optimizer rules for Java calling convention.
  */
+@PackageMarker
 package org.apache.calcite.adapter.enumerable;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/adapter/java/package-info.java

@@ -19,6 +19,9 @@
  * Query provider based on Java in-memory data
  * structures.
  */
+@PackageMarker
 package org.apache.calcite.adapter.java;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/adapter/jdbc/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Query provider based on a JDBC data source.
  */
+@PackageMarker
 package org.apache.calcite.adapter.jdbc;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/adapter/package-info.java

@@ -37,6 +37,9 @@
  * </pre>
  * </blockquote>
  */
+@PackageMarker
 package org.apache.calcite.adapter;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/config/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Configuration.
  */
+@PackageMarker
 package org.apache.calcite.config;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/interpreter/package-info.java

@@ -22,6 +22,9 @@
  * preparation time is less, and so the total prepare + execute time is
  * competitive for queries over small data sets.
  */
+@PackageMarker
 package org.apache.calcite.interpreter;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/jdbc/package-info.java

@@ -18,6 +18,9 @@
 /**
  * JDBC driver for Calcite.
  */
+@PackageMarker
 package org.apache.calcite.jdbc;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/materialize/package-info.java

@@ -32,6 +32,9 @@
  * instantiating materializations from the intermediate results of queries, and
  * recognize what materializations would be useful based on actual query load.
  */
+@PackageMarker
 package org.apache.calcite.materialize;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/model/package-info.java

@@ -34,6 +34,9 @@
  * <a href="https://github.com/julianhyde/blog/master/optiq-csv/TUTORIAL.md">optiq-csv
  * tutorial</a>.
  */
+@PackageMarker
 package org.apache.calcite.model;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Main package for Calcite, the dynamic data management platform.
  */
+@PackageMarker
 package org.apache.calcite;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/plan/hep/package-info.java

@@ -19,6 +19,9 @@
  * Provides a heuristic planner implementation for the interfaces in
  * {@link org.apache.calcite.plan}.
  */
+@PackageMarker
 package org.apache.calcite.plan.hep;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/plan/package-info.java

@@ -19,6 +19,9 @@
  * Defines interfaces for constructing rule-based optimizers of
  * relational expressions.
  */
+@PackageMarker
 package org.apache.calcite.plan;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/plan/volcano/package-info.java

@@ -268,6 +268,9 @@
  *     McKenna
  *     (1993)</a>.</p>
  */
+@PackageMarker
 package org.apache.calcite.plan.volcano;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/prepare/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Preparation of queries (parsing, planning and implementation).
  */
+@PackageMarker
 package org.apache.calcite.prepare;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/convert/package-info.java

@@ -19,6 +19,9 @@
  * Defines relational expressions and rules for converting between calling
  * conventions.
  */
+@PackageMarker
 package org.apache.calcite.rel.convert;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/core/package-info.java

@@ -31,6 +31,9 @@
  *
  * </ul>
  */
+@PackageMarker
 package org.apache.calcite.rel.core;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/externalize/package-info.java

@@ -19,6 +19,9 @@
  * Facilities to externalize {@link org.apache.calcite.rel.RelNode}s to and from
  * XML and JSON format.
  */
+@PackageMarker
 package org.apache.calcite.rel.externalize;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/jdbc/package-info.java

@@ -19,6 +19,9 @@
  * Contains query transformation rules relating to generating SQL for
  * foreign JDBC databases.
  */
+@PackageMarker
 package org.apache.calcite.rel.jdbc;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/logical/package-info.java

@@ -31,6 +31,9 @@
  *
  * </ul>
  */
+@PackageMarker
 package org.apache.calcite.rel.logical;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/metadata/package-info.java

@@ -19,6 +19,9 @@
  * Defines metadata interfaces and utilities for relational
  * expressions.
  */
+@PackageMarker
 package org.apache.calcite.rel.metadata;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/package-info.java

@@ -35,6 +35,9 @@
  *
  * </ul>
  */
+@PackageMarker
 package org.apache.calcite.rel;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/rules/package-info.java

@@ -47,6 +47,9 @@
  *        provides an optimizer interface.</li>
  * </ul>
  */
+@PackageMarker
 package org.apache.calcite.rel.rules;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rel/type/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Defines a type system for relational expressions.
  */
+@PackageMarker
 package org.apache.calcite.rel.type;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/rex/package-info.java

@@ -79,6 +79,9 @@
  *
  * </ul>
  */
+@PackageMarker
 package org.apache.calcite.rex;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/runtime/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Utilities required at runtime.
  */
+@PackageMarker
 package org.apache.calcite.runtime;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/schema/impl/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Utilities to help implement Calcite's SPIs.
  */
+@PackageMarker
 package org.apache.calcite.schema.impl;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/schema/package-info.java

@@ -22,6 +22,9 @@
  * SQL validator to validate SQL abstract syntax trees and resolve
  * identifiers to objects.
  */
+@PackageMarker
 package org.apache.calcite.schema;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/server/package-info.java

@@ -18,6 +18,9 @@
 /**
  * Provides a server for hosting Calcite connections.
  */
+@PackageMarker
 package org.apache.calcite.server;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java

core/src/main/java/org/apache/calcite/sql/advise/package-info.java

@@ -24,6 +24,9 @@
  * <p>The advisor uses the validation and parser framework set up in
  * <code>org.apache.calcite.sql.validate</code> package.
 */
+@PackageMarker
 package org.apache.calcite.sql.advise;
 
+import org.apache.calcite.avatica.util.PackageMarker;
+
 // End package-info.java