PARQUET-2075: Implement unified file rewriter

 - A new ParquetRewriter is introduced to unify rewriting logic.
 - RewriteOptions is defined to provide essential settings.
 - CompressionConverter, ColumnPruner, ColumnMasker, and ColumnEncryptor
   have been refactored.

parquet-hadoop/src/main/java/org/apache/parquet/hadoop/rewrite/MaskMode.java

@@ -0,0 +1,45 @@
+/*
+ * 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.parquet.hadoop.rewrite;
+
+public enum MaskMode {
+  NULLIFY("nullify"),
+  HASH("hash"),
+  REDACT("redact");
+
+  private String mode;
+
+  MaskMode(String text) {
+    this.mode = text;
+  }
+
+  public String getMode() {
+    return this.mode;
+  }
+
+  public static MaskMode fromString(String mode) {
+    for (MaskMode b : MaskMode.values()) {
+      if (b.mode.equalsIgnoreCase(mode)) {
+        return b;
+      }
+    }
+    return null;
+  }
+
+}

parquet-hadoop/src/main/java/org/apache/parquet/hadoop/rewrite/RewriteOptions.java

@@ -0,0 +1,144 @@
+/*
+ * 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.parquet.hadoop.rewrite;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.Path;
+import org.apache.parquet.crypto.FileEncryptionProperties;
+import org.apache.parquet.hadoop.metadata.CompressionCodecName;
+
+import java.util.List;
+import java.util.Map;
+
+public class RewriteOptions {
+
+  final Configuration conf;
+  final Path inputFile;
+  final Path outputFile;
+  final List<String> pruneColumns;
+  final CompressionCodecName codecName;
+  final Map<String, MaskMode> maskColumns;
+  final List<String> encryptColumns;
+  final FileEncryptionProperties fileEncryptionProperties;
+
+  private RewriteOptions(Configuration conf,
+                         Path inputFile,
+                         Path outputFile,
+                         List<String> pruneColumns,
+                         CompressionCodecName codecName,
+                         Map<String, MaskMode> maskColumns,
+                         List<String> encryptColumns,
+                         FileEncryptionProperties fileEncryptionProperties) {
+    this.conf = conf;
+    this.inputFile = inputFile;
+    this.outputFile = outputFile;
+    this.pruneColumns = pruneColumns;
+    this.codecName = codecName;
+    this.maskColumns = maskColumns;
+    this.encryptColumns = encryptColumns;
+    this.fileEncryptionProperties = fileEncryptionProperties;
+  }
+
+  public Configuration getConf() {
+    return conf;
+  }
+
+  public Path getInputFile() {
+    return inputFile;
+  }
+
+  public Path getOutputFile() {
+    return outputFile;
+  }
+
+  public List<String> getPruneColumns() {
+    return pruneColumns;
+  }
+
+  public CompressionCodecName getCodecName() {
+    return codecName;
+  }
+
+  public Map<String, MaskMode> getMaskColumns() {
+    return maskColumns;
+  }
+
+  public List<String> getEncryptColumns() {
+    return encryptColumns;
+  }
+
+  public FileEncryptionProperties getFileEncryptionProperties() {
+    return fileEncryptionProperties;
+  }
+
+  public static class Builder {
+    private Configuration conf;
+    private Path inputFile;
+    private Path outputFile;
+    private List<String> pruneColumns;
+    private CompressionCodecName codecName;
+    private Map<String, MaskMode> maskColumns;
+    private List<String> encryptColumns;
+    private FileEncryptionProperties fileEncryptionProperties;
+
+    public Builder(Configuration conf, Path inputFile, Path outputFile) {
+      this.conf = conf;
+      this.inputFile = inputFile;
+      this.outputFile = outputFile;
+    }
+
+    public Builder prune(List<String> columns) {
+      this.pruneColumns = columns;
+      return this;
+    }
+
+    public Builder transform(CompressionCodecName codecName) {
+      this.codecName = codecName;
+      return this;
+    }
+
+    public Builder mask(Map<String, MaskMode> maskColumns) {
+      this.maskColumns = maskColumns;
+      return this;
+    }
+
+    public Builder encrypt(List<String> encryptColumns) {
+      this.encryptColumns = encryptColumns;
+      return this;
+    }
+
+    public Builder encryptionProperties(FileEncryptionProperties fileEncryptionProperties) {
+      this.fileEncryptionProperties = fileEncryptionProperties;
+      return this;
+    }
+
+    public RewriteOptions build() {
+      // TODO: validate any conflict setting
+      return new RewriteOptions(conf,
+              inputFile,
+              outputFile,
+              pruneColumns,
+              codecName,
+              maskColumns,
+              encryptColumns,
+              fileEncryptionProperties);
+    }
+  }
+
+}