LUCENE-4664: Make oal.codec.compressing.{C,Dec}ompressor public.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1430177 13f79535-47bb-0310-9956-ffa450edef68

lucene/core/src/java/org/apache/lucene/codecs/compressing/Compressor.java

@@ -24,7 +24,10 @@ import org.apache.lucene.store.DataOutput;
 /**
  * A data compressor.
  */
-abstract class Compressor {
+public abstract class Compressor {
+
+  /** Sole constructor, typically called from sub-classes. */
+  protected Compressor() {}
 
   /**
    * Compress bytes into <code>out</code>. It it the responsibility of the

lucene/core/src/java/org/apache/lucene/codecs/compressing/Decompressor.java

@@ -24,9 +24,12 @@ import org.apache.lucene.store.DataOutput;
 import org.apache.lucene.util.BytesRef;
 
 /**
- * An decompressor.
+ * A decompressor.
  */
-abstract class Decompressor implements Cloneable {
+public abstract class Decompressor implements Cloneable {
+
+  /** Sole constructor, typically called from sub-classes. */
+  protected Decompressor() {}
 
   /**
    * Decompress bytes that were stored between offsets <code>offset</code> and

lucene/test-framework/src/java/org/apache/lucene/codecs/compressing/CompressingCodec.java

@@ -21,6 +21,7 @@ import java.util.Random;
 
 import org.apache.lucene.codecs.FilterCodec;
 import org.apache.lucene.codecs.StoredFieldsFormat;
+import org.apache.lucene.codecs.compressing.dummy.DummyCompressingCodec;
 import org.apache.lucene.codecs.lucene41.Lucene41Codec;
 
 import com.carrotsearch.randomizedtesting.generators.RandomInts;

lucene/test-framework/src/java/org/apache/lucene/codecs/compressing/dummy/DummyCompressingCodec.java

@@ -0,0 +1,102 @@
+package org.apache.lucene.codecs.compressing.dummy;
+
+/*
+ * 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.
+ */
+
+import java.io.IOException;
+
+import org.apache.lucene.codecs.compressing.CompressingCodec;
+import org.apache.lucene.codecs.compressing.CompressionMode;
+import org.apache.lucene.codecs.compressing.Compressor;
+import org.apache.lucene.codecs.compressing.Decompressor;
+import org.apache.lucene.store.DataInput;
+import org.apache.lucene.store.DataOutput;
+import org.apache.lucene.util.ArrayUtil;
+import org.apache.lucene.util.BytesRef;
+
+/** CompressionCodec that does not compress data, useful for testing. */
+// In its own package to make sure the oal.codecs.compressing classes are
+// visible enough to let people write their own CompressionMode
+public class DummyCompressingCodec extends CompressingCodec {
+
+  public static final CompressionMode DUMMY = new CompressionMode() {
+
+    @Override
+    public Compressor newCompressor() {
+      return DUMMY_COMPRESSOR;
+    }
+
+    @Override
+    public Decompressor newDecompressor() {
+      return DUMMY_DECOMPRESSOR;
+    }
+
+    @Override
+    public String toString() {
+      return "DUMMY";
+    }
+
+  };
+
+  private static final Decompressor DUMMY_DECOMPRESSOR = new Decompressor() {
+
+    @Override
+    public void decompress(DataInput in, int originalLength,
+        int offset, int length, BytesRef bytes) throws IOException {
+      assert offset + length <= originalLength;
+      if (bytes.bytes.length < originalLength) {
+        bytes.bytes = new byte[ArrayUtil.oversize(originalLength, 1)];
+      }
+      in.readBytes(bytes.bytes, 0, offset + length);
+      bytes.offset = offset;
+      bytes.length = length;
+    }
+
+    @Override
+    public void copyCompressedData(DataInput in, int originalLength, DataOutput out) throws IOException {
+      out.copyBytes(in, originalLength);
+    }
+
+    @Override
+    public Decompressor clone() {
+      return this;
+    }
+
+  };
+
+  private static final Compressor DUMMY_COMPRESSOR = new Compressor() {
+
+    @Override
+    public void compress(byte[] bytes, int off, int len, DataOutput out) throws IOException {
+      out.writeBytes(bytes, off, len);
+    }
+
+  };
+
+  /** Constructor that allows to configure the chunk size. */
+  public DummyCompressingCodec(int chunkSize, boolean withSegmentSuffix) {
+    super("DummyCompressingStoredFields",
+          withSegmentSuffix ? "DummyCompressingStoredFields" : "",
+          DUMMY, chunkSize);
+  }
+
+  /** Default constructor. */
+  public DummyCompressingCodec() {
+    this(1 << 14, false);
+  }
+
+}

lucene/test-framework/src/java/org/apache/lucene/codecs/compressing/dummy/package.html

@@ -0,0 +1,25 @@
+<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
+<!--
+ 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.
+-->
+<html>
+<head>
+   <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+</head>
+<body>
+Dummy CompressingCodec implementation used for testing.
+</body>
+</html>

lucene/test-framework/src/resources/META-INF/services/org.apache.lucene.codecs.Codec

@@ -17,4 +17,4 @@ org.apache.lucene.codecs.asserting.AssertingCodec
 org.apache.lucene.codecs.compressing.FastCompressingCodec
 org.apache.lucene.codecs.compressing.FastDecompressionCompressingCodec
 org.apache.lucene.codecs.compressing.HighCompressionCompressingCodec
-org.apache.lucene.codecs.compressing.DummyCompressingCodec
+org.apache.lucene.codecs.compressing.dummy.DummyCompressingCodec