com.hazelcast.org.apache.calcite.interpreter.UncollectNode Maven / Gradle / Ivy
/*
* 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 com.hazelcast.org.apache.calcite.interpreter;
import com.hazelcast.org.apache.calcite.rel.core.Uncollect;
import java.util.List;
import java.util.Locale;
import java.util.Map;
/**
* Interpreter node that implements a
* {@link com.hazelcast.org.apache.calcite.rel.core.Uncollect}.
*/
public class UncollectNode extends AbstractSingleNode {
public UncollectNode(Compiler compiler, Uncollect uncollect) {
super(compiler, uncollect);
}
@Override public void run() throws InterruptedException {
Row row = null;
while ((row = source.receive()) != null) {
for (Object value: row.getValues()) {
if (value == null) {
throw new NullPointerException("NULL value for unnest.");
}
int i = 1;
if (value instanceof List) {
List list = (List) value;
for (Object o : list) {
if (rel.withOrdinality) {
sink.send(Row.of(o, i++));
} else {
sink.send(Row.of(o));
}
}
} else if (value instanceof Map) {
Map map = (Map) value;
for (Object key : map.keySet()) {
if (rel.withOrdinality) {
sink.send(Row.of(key, map.get(key), i++));
} else {
sink.send(Row.of(key, map.get(key)));
}
}
} else {
throw new UnsupportedOperationException(
String.format(Locale.ROOT,
"Invalid type: %s for unnest.",
value.getClass().getCanonicalName()));
}
}
}
}
}