/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* Licensed 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 com.linkedin.pinot.pql.parsers.pql2.ast;
import com.linkedin.pinot.common.request.FilterOperator;
import com.linkedin.pinot.common.utils.StringUtil;
import com.linkedin.pinot.common.utils.request.FilterQueryTree;
import com.linkedin.pinot.pql.parsers.Pql2CompilationException;
import java.util.Collections;
import java.util.TreeSet;
/**
* AST node for IN predicates.
*/
public class InPredicateAstNode extends PredicateAstNode {
private final boolean _isNotInClause;
private String _identifier;
public InPredicateAstNode(boolean isNotInClause) {
_isNotInClause = isNotInClause;
}
@Override
public void addChild(AstNode childNode) {
if (childNode instanceof IdentifierAstNode) {
if (_identifier == null) {
IdentifierAstNode node = (IdentifierAstNode) childNode;
_identifier = node.getName();
} else {
throw new Pql2CompilationException("IN predicate has more than one identifier.");
}
} else {
super.addChild(childNode);
}
}
public String getIdentifier() {
return _identifier;
}
@Override
public String toString() {
return "InPredicateAstNode{" + "_identifier='" + _identifier + '\'' + '}';
}
@Override
public FilterQueryTree buildFilterQueryTree() {
if (_identifier == null) {
throw new Pql2CompilationException("IN predicate has no identifier");
}
TreeSet<String> values = new TreeSet<>();
for (AstNode astNode : getChildren()) {
if (astNode instanceof LiteralAstNode) {
LiteralAstNode node = (LiteralAstNode) astNode;
values.add(node.getValueAsString());
}
}
String[] valueArray = values.toArray(new String[values.size()]);
FilterOperator filterOperator;
if (_isNotInClause) {
filterOperator = FilterOperator.NOT_IN;
} else {
filterOperator = FilterOperator.IN;
}
return new FilterQueryTree(_identifier, Collections.singletonList(StringUtil.join("\t\t", valueArray)),
filterOperator, null);
}
}