Github user manishgupta88 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/3039#discussion_r244668632
--- Diff:
core/src/main/java/org/apache/carbondata/core/scan/expression/conditional/ImplicitExpression.java
---
@@ -0,0 +1,109 @@
+/*
+ * 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.scan.expression.conditional;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.scan.expression.Expression;
+import org.apache.carbondata.core.scan.expression.ExpressionResult;
+import org.apache.carbondata.core.scan.expression.LiteralExpression;
+import
org.apache.carbondata.core.scan.expression.exception.FilterIllegalMemberException;
+import
org.apache.carbondata.core.scan.expression.exception.FilterUnsupportedException;
+import org.apache.carbondata.core.scan.filter.intf.ExpressionType;
+import org.apache.carbondata.core.scan.filter.intf.RowIntf;
+
+import org.apache.commons.lang.StringUtils;
+
+/**
+ * Custom class to handle filter values for Implicit filter
+ */
+public class ImplicitExpression extends Expression {
+
+ /**
+ * map that contains the mapping of block id to the valid blocklets in
that block which contain
+ * the data as per the applied filter
+ */
+ private Map<String, Set<Integer>> blockIdToBlockletIdMapping;
+
+ public ImplicitExpression(List<Expression> implicitFilterList) {
+ // initialize map with half the size of filter list as one block id
can contain
+ // multiple blocklets
+ blockIdToBlockletIdMapping = new HashMap<>(implicitFilterList.size() /
2);
+ for (Expression value : implicitFilterList) {
+ String blockletPath = ((LiteralExpression)
value).getLiteralExpValue().toString();
+ addBlockEntry(blockletPath);
+ }
+ }
+
+ public ImplicitExpression(Map<String, Set<Integer>>
blockIdToBlockletIdMapping) {
+ this.blockIdToBlockletIdMapping = blockIdToBlockletIdMapping;
+ }
+
+ private void addBlockEntry(String blockletPath) {
+ String blockId =
+ blockletPath.substring(0,
blockletPath.lastIndexOf(CarbonCommonConstants.FILE_SEPARATOR));
+ Set<Integer> blockletIds = blockIdToBlockletIdMapping.get(blockId);
+ if (null == blockletIds) {
+ blockletIds = new HashSet<>();
+ blockIdToBlockletIdMapping.put(blockId, blockletIds);
+ }
+
blockletIds.add(Integer.parseInt(blockletPath.substring(blockId.length() + 1)));
+ }
+
+ @Override public ExpressionResult evaluate(RowIntf value)
+ throws FilterUnsupportedException, FilterIllegalMemberException {
+ throw new UnsupportedOperationException("Operation not supported for
Implicit expression");
+ }
+
+ public Map<String, Set<Integer>> getBlockIdToBlockletIdMapping() {
+ return blockIdToBlockletIdMapping;
+ }
+
+ @Override public ExpressionType getFilterExpressionType() {
+ return ExpressionType.IMPLICIT;
+ }
+
+ @Override public void findAndSetChild(Expression oldExpr, Expression
newExpr) {
--- End diff --
This method is not required to be implemented in this class so its
implementation is empty
---
