Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2662#discussion_r213161218
--- Diff:
core/src/main/java/org/apache/carbondata/core/datastore/page/FallbackDecoderBasedColumnPageEncoder.java
---
@@ -0,0 +1,98 @@
+/*
+ * 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.carbondata.core.datastore.page;
+
+import java.util.concurrent.Callable;
+
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datastore.TableSpec;
+import org.apache.carbondata.core.datastore.compression.CompressorFactory;
+import
org.apache.carbondata.core.datastore.page.encoding.EncodedColumnPage;
+import org.apache.carbondata.core.keygenerator.KeyGenerator;
+import org.apache.carbondata.core.keygenerator.factory.KeyGeneratorFactory;
+import
org.apache.carbondata.core.localdictionary.generator.LocalDictionaryGenerator;
+import org.apache.carbondata.core.metadata.datatype.DataType;
+import org.apache.carbondata.core.util.CarbonUtil;
+
+public class FallbackDecoderBasedColumnPageEncoder implements
Callable<FallbackEncodedColumnPage> {
+ /**
+ * actual local dictionary generated column page
+ */
+ private EncodedColumnPage encodedColumnPage;
+
+ /**
+ * actual index in the page
+ * this is required as in a blocklet few pages will be local dictionary
+ * encoded and few pages will be plain text encoding
+ * in this case local dictionary encoded page
+ */
+ private int pageIndex;
+
+ private LocalDictionaryGenerator localDictionaryGenerator;
+
+ public FallbackDecoderBasedColumnPageEncoder(EncodedColumnPage
encodedColumnPage, int pageIndex,
+ LocalDictionaryGenerator localDictionaryGenerator) {
+ this.encodedColumnPage = encodedColumnPage;
+ this.pageIndex = pageIndex;
+ this.localDictionaryGenerator = localDictionaryGenerator;
+ }
+
+ @Override public FallbackEncodedColumnPage call() throws Exception {
+
+ // uncompress the encoded column page
+ byte[] bytes = CompressorFactory.getInstance().getCompressor()
--- End diff --
emm, PR #2628 changed this. We should get the compressor from input
configuration or from the metadata.
---
